diff --git a/3party/fmt/.clang-format b/3party/fmt/.clang-format
deleted file mode 100644
index df55d34..0000000
--- a/3party/fmt/.clang-format
+++ /dev/null
@@ -1,8 +0,0 @@
-# Run manually to reformat a file:
-# clang-format -i --style=file <file>
-Language: Cpp
-BasedOnStyle: Google
-IndentPPDirectives: AfterHash
-IndentCaseLabels: false
-AlwaysBreakTemplateDeclarations: false
-DerivePointerAlignment: false
diff --git a/3party/fmt/.gitignore b/3party/fmt/.gitignore
new file mode 100644
index 0000000..c57070c
--- /dev/null
+++ b/3party/fmt/.gitignore
@@ -0,0 +1,19 @@
+bin/
+/_CPack_Packages
+/doc/doxyxml
+/doc/html
+virtualenv
+/Testing
+/install_manifest.txt
+*~
+*.a
+*.so*
+*.zip
+cmake_install.cmake
+CPack*.cmake
+fmt-*.cmake
+CTestTestfile.cmake
+CMakeCache.txt
+CMakeFiles
+Makefile
+run-msbuild.bat
diff --git a/3party/fmt/support/Android.mk b/3party/fmt/Android.mk
similarity index 87%
rename from 3party/fmt/support/Android.mk
rename to 3party/fmt/Android.mk
index 84a3e32..5d86239 100644
--- a/3party/fmt/support/Android.mk
+++ b/3party/fmt/Android.mk
@@ -4,7 +4,7 @@ include $(CLEAR_VARS)
 LOCAL_MODULE := fmt_static
 LOCAL_MODULE_FILENAME := libfmt
 
-LOCAL_SRC_FILES := ../src/format.cc
+LOCAL_SRC_FILES := fmt/format.cc
 
 LOCAL_C_INCLUDES := $(LOCAL_PATH)
 LOCAL_EXPORT_C_INCLUDES := $(LOCAL_PATH)
diff --git a/3party/fmt/CMakeLists.txt b/3party/fmt/CMakeLists.txt
index 4b928ae..887f7bd 100644
--- a/3party/fmt/CMakeLists.txt
+++ b/3party/fmt/CMakeLists.txt
@@ -1,176 +1,54 @@
-cmake_minimum_required(VERSION 3.8...3.26)
+message(STATUS "CMake version: ${CMAKE_VERSION}")
 
-# Fallback for using newer policies on CMake <3.12.
-if (${CMAKE_VERSION} VERSION_LESS 3.12)
-  cmake_policy(VERSION ${CMAKE_MAJOR_VERSION}.${CMAKE_MINOR_VERSION})
+cmake_minimum_required(VERSION 2.8.12)
+
+if (POLICY CMP0048) # Version variables
+  cmake_policy(SET CMP0048 OLD)
 endif ()
 
+if (POLICY CMP0063) # Visibility
+  cmake_policy(SET CMP0063 OLD)
+endif (POLICY CMP0063)
+
 # Determine if fmt is built as a subproject (using add_subdirectory)
 # or if it is the master project.
-if (NOT DEFINED FMT_MASTER_PROJECT)
-  set(FMT_MASTER_PROJECT OFF)
-  if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
-    set(FMT_MASTER_PROJECT ON)
-    message(STATUS "CMake version: ${CMAKE_VERSION}")
-  endif ()
+set(MASTER_PROJECT OFF)
+if (CMAKE_CURRENT_SOURCE_DIR STREQUAL CMAKE_SOURCE_DIR)
+  set(MASTER_PROJECT ON)
 endif ()
 
 # Joins arguments and places the results in ${result_var}.
 function(join result_var)
-  set(result "")
+  set(result )
   foreach (arg ${ARGN})
     set(result "${result}${arg}")
   endforeach ()
   set(${result_var} "${result}" PARENT_SCOPE)
 endfunction()
 
-# DEPRECATED! Should be merged into add_module_library.
-function(enable_module target)
-  if (MSVC)
-    set(BMI ${CMAKE_CURRENT_BINARY_DIR}/${target}.ifc)
-    target_compile_options(${target}
-      PRIVATE /interface /ifcOutput ${BMI}
-      INTERFACE /reference fmt=${BMI})
-    set_target_properties(${target} PROPERTIES ADDITIONAL_CLEAN_FILES ${BMI})
-    set_source_files_properties(${BMI} PROPERTIES GENERATED ON)
-  endif ()
-endfunction()
-
-# Adds a library compiled with C++20 module support.
-# `enabled` is a CMake variables that specifies if modules are enabled.
-# If modules are disabled `add_module_library` falls back to creating a
-# non-modular library.
-#
-# Usage:
-#   add_module_library(<name> [sources...] FALLBACK [sources...] [IF enabled])
-function(add_module_library name)
-  cmake_parse_arguments(AML "" "IF" "FALLBACK" ${ARGN})
-  set(sources ${AML_UNPARSED_ARGUMENTS})
-
-  add_library(${name})
-  set_target_properties(${name} PROPERTIES LINKER_LANGUAGE CXX)
-
-  if (NOT ${${AML_IF}})
-    # Create a non-modular library.
-    target_sources(${name} PRIVATE ${AML_FALLBACK})
-    return()
-  endif ()
-
-  # Modules require C++20.
-  target_compile_features(${name} PUBLIC cxx_std_20)
-  if (CMAKE_COMPILER_IS_GNUCXX)
-    target_compile_options(${name} PUBLIC -fmodules-ts)
-  endif ()
-
-  # `std` is affected by CMake options and may be higher than C++20.
-  get_target_property(std ${name} CXX_STANDARD)
-
-  if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-    set(pcms)
-    foreach (src ${sources})
-      get_filename_component(pcm ${src} NAME_WE)
-      set(pcm ${pcm}.pcm)
-
-      # Propagate -fmodule-file=*.pcm to targets that link with this library.
-      target_compile_options(
-        ${name} PUBLIC -fmodule-file=${CMAKE_CURRENT_BINARY_DIR}/${pcm})
-
-      # Use an absolute path to prevent target_link_libraries prepending -l
-      # to it.
-      set(pcms ${pcms} ${CMAKE_CURRENT_BINARY_DIR}/${pcm})
-      add_custom_command(
-        OUTPUT ${pcm}
-        COMMAND ${CMAKE_CXX_COMPILER}
-                -std=c++${std} -x c++-module --precompile -c
-                -o ${pcm} ${CMAKE_CURRENT_SOURCE_DIR}/${src}
-                "-I$<JOIN:$<TARGET_PROPERTY:${name},INCLUDE_DIRECTORIES>,;-I>"
-        # Required by the -I generator expression above.
-        COMMAND_EXPAND_LISTS
-        DEPENDS ${src})
-    endforeach ()
-
-    # Add .pcm files as sources to make sure they are built before the library.
-    set(sources)
-    foreach (pcm ${pcms})
-      get_filename_component(pcm_we ${pcm} NAME_WE)
-      set(obj ${pcm_we}.o)
-      # Use an absolute path to prevent target_link_libraries prepending -l.
-      set(sources ${sources} ${pcm} ${CMAKE_CURRENT_BINARY_DIR}/${obj})
-      add_custom_command(
-        OUTPUT ${obj}
-        COMMAND ${CMAKE_CXX_COMPILER} $<TARGET_PROPERTY:${name},COMPILE_OPTIONS>
-                -c -o ${obj} ${pcm}
-        DEPENDS ${pcm})
-    endforeach ()
-  endif ()
-  target_sources(${name} PRIVATE ${sources})
-endfunction()
-
-include(CMakeParseArguments)
-
-# Sets a cache variable with a docstring joined from multiple arguments:
-#   set(<variable> <value>... CACHE <type> <docstring>...)
-# This allows splitting a long docstring for readability.
-function(set_verbose)
-  # cmake_parse_arguments is broken in CMake 3.4 (cannot parse CACHE) so use
-  # list instead.
-  list(GET ARGN 0 var)
-  list(REMOVE_AT ARGN 0)
-  list(GET ARGN 0 val)
-  list(REMOVE_AT ARGN 0)
-  list(REMOVE_AT ARGN 0)
-  list(GET ARGN 0 type)
-  list(REMOVE_AT ARGN 0)
-  join(doc ${ARGN})
-  set(${var} ${val} CACHE ${type} ${doc})
-endfunction()
-
 # Set the default CMAKE_BUILD_TYPE to Release.
 # This should be done before the project command since the latter can set
 # CMAKE_BUILD_TYPE itself (it does so for nmake).
-if (FMT_MASTER_PROJECT AND NOT CMAKE_BUILD_TYPE)
-  set_verbose(CMAKE_BUILD_TYPE Release CACHE STRING
-              "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or "
-              "CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.")
+if (NOT CMAKE_BUILD_TYPE)
+  join(doc "Choose the type of build, options are: None(CMAKE_CXX_FLAGS or "
+           "CMAKE_C_FLAGS used) Debug Release RelWithDebInfo MinSizeRel.")
+  set(CMAKE_BUILD_TYPE Release CACHE STRING ${doc})
 endif ()
 
-project(FMT CXX)
-include(GNUInstallDirs)
-set_verbose(FMT_INC_DIR ${CMAKE_INSTALL_INCLUDEDIR} CACHE STRING
-            "Installation directory for include files, a relative path that "
-            "will be joined with ${CMAKE_INSTALL_PREFIX} or an absolute path.")
-
 option(FMT_PEDANTIC "Enable extra warnings and expensive tests." OFF)
-option(FMT_WERROR "Halt the compilation with an error on compiler warnings."
-       OFF)
 
 # Options that control generation of various targets.
-option(FMT_DOC "Generate the doc target." ${FMT_MASTER_PROJECT})
-option(FMT_INSTALL "Generate the install target." ON)
-option(FMT_TEST "Generate the test target." ${FMT_MASTER_PROJECT})
-option(FMT_FUZZ "Generate the fuzz target." OFF)
-option(FMT_CUDA_TEST "Generate the cuda-test target." OFF)
-option(FMT_OS "Include core requiring OS (Windows/Posix) " ON)
-option(FMT_MODULE "Build a module instead of a traditional library." OFF)
-option(FMT_SYSTEM_HEADERS "Expose headers with marking them as system." OFF)
+option(FMT_DOC "Generate the doc target." ${MASTER_PROJECT})
+option(FMT_INSTALL "Generate the install target." ${MASTER_PROJECT})
+option(FMT_TEST "Generate the test target." ${MASTER_PROJECT})
+option(FMT_USE_CPP11 "Enable the addition of C++11 compiler flags." ON)
 
-if (FMT_TEST AND FMT_MODULE)
-  # The tests require {fmt} to be compiled as traditional library
-  message(STATUS "Testing is incompatible with build mode 'module'.")
-endif ()
-set(FMT_SYSTEM_HEADERS_ATTRIBUTE "")
-if (FMT_SYSTEM_HEADERS)
-  set(FMT_SYSTEM_HEADERS_ATTRIBUTE SYSTEM)
-endif ()
-if (CMAKE_SYSTEM_NAME STREQUAL "MSDOS")
-  set(FMT_TEST OFF)
-  message(STATUS "MSDOS is incompatible with gtest")
-endif ()
+project(FMT)
 
-# Get version from core.h
-file(READ include/fmt/core.h core_h)
-if (NOT core_h MATCHES "FMT_VERSION ([0-9]+)([0-9][0-9])([0-9][0-9])")
-  message(FATAL_ERROR "Cannot get FMT_VERSION from core.h.")
+# Starting with cmake 3.0 VERSION is part of the project command.
+file(READ fmt/format.h format_h)
+if (NOT format_h MATCHES "FMT_VERSION ([0-9]+)([0-9][0-9])([0-9][0-9])")
+  message(FATAL_ERROR "Cannot get FMT_VERSION from format.h.")
 endif ()
 # Use math to skip leading zeros if any.
 math(EXPR CPACK_PACKAGE_VERSION_MAJOR ${CMAKE_MATCH_1})
@@ -182,72 +60,18 @@ message(STATUS "Version: ${FMT_VERSION}")
 
 message(STATUS "Build type: ${CMAKE_BUILD_TYPE}")
 
-if (NOT CMAKE_RUNTIME_OUTPUT_DIRECTORY)
-  set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/bin)
-endif ()
+set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/bin)
 
 set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH}
   "${CMAKE_CURRENT_SOURCE_DIR}/support/cmake")
 
-include(CheckCXXCompilerFlag)
-include(JoinPaths)
+include(cxx11)
 
-if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_CXX_VISIBILITY_PRESET)
-  set_verbose(CMAKE_CXX_VISIBILITY_PRESET hidden CACHE STRING
-              "Preset for the export of private symbols")
-  set_property(CACHE CMAKE_CXX_VISIBILITY_PRESET PROPERTY STRINGS
-               hidden default)
+if (CMAKE_COMPILER_IS_GNUCXX OR (CMAKE_CXX_COMPILER_ID MATCHES "Clang"))
+  set(PEDANTIC_COMPILE_FLAGS -Wall -Wextra -Wshadow -pedantic)
 endif ()
 
-if (FMT_MASTER_PROJECT AND NOT DEFINED CMAKE_VISIBILITY_INLINES_HIDDEN)
-  set_verbose(CMAKE_VISIBILITY_INLINES_HIDDEN ON CACHE BOOL
-              "Whether to add a compile flag to hide symbols of inline functions")
-endif ()
-
-if (CMAKE_CXX_COMPILER_ID MATCHES "GNU")
-  set(PEDANTIC_COMPILE_FLAGS -pedantic-errors -Wall -Wextra -pedantic
-      -Wold-style-cast -Wundef
-      -Wredundant-decls -Wwrite-strings -Wpointer-arith
-      -Wcast-qual -Wformat=2 -Wmissing-include-dirs
-      -Wcast-align
-      -Wctor-dtor-privacy -Wdisabled-optimization
-      -Winvalid-pch -Woverloaded-virtual
-      -Wconversion -Wundef
-      -Wno-ctor-dtor-privacy -Wno-format-nonliteral)
-  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.6)
-      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS}
-         -Wno-dangling-else -Wno-unused-local-typedefs)
-  endif ()
-  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.0)
-      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wdouble-promotion
-          -Wtrampolines -Wzero-as-null-pointer-constant -Wuseless-cast
-          -Wvector-operation-performance -Wsized-deallocation -Wshadow)
-  endif ()
-  if (NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0)
-      set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS} -Wshift-overflow=2
-          -Wnull-dereference -Wduplicated-cond)
-  endif ()
-  set(WERROR_FLAG -Werror)
-endif ()
-
-if (CMAKE_CXX_COMPILER_ID MATCHES "Clang")
-  set(PEDANTIC_COMPILE_FLAGS -Wall -Wextra -pedantic -Wconversion -Wundef
-      -Wdeprecated -Wweak-vtables -Wshadow
-      -Wno-gnu-zero-variadic-macro-arguments)
-  check_cxx_compiler_flag(-Wzero-as-null-pointer-constant HAS_NULLPTR_WARNING)
-  if (HAS_NULLPTR_WARNING)
-    set(PEDANTIC_COMPILE_FLAGS ${PEDANTIC_COMPILE_FLAGS}
-        -Wzero-as-null-pointer-constant)
-  endif ()
-  set(WERROR_FLAG -Werror)
-endif ()
-
-if (MSVC)
-  set(PEDANTIC_COMPILE_FLAGS /W3)
-  set(WERROR_FLAG /WX)
-endif ()
-
-if (FMT_MASTER_PROJECT AND CMAKE_GENERATOR MATCHES "Visual Studio")
+if (MASTER_PROJECT AND CMAKE_GENERATOR MATCHES "Visual Studio")
   # If Microsoft SDK is installed create script run-msbuild.bat that
   # calls SetEnv.cmd to set up build environment and runs msbuild.
   # It is useful when building Visual Studio projects with the SDK
@@ -257,158 +81,21 @@ if (FMT_MASTER_PROJECT AND CMAKE_GENERATOR MATCHES "Visual Studio")
     set(MSBUILD_SETUP "call \"${WINSDK_SETENV}\"")
   endif ()
   # Set FrameworkPathOverride to get rid of MSB3644 warnings.
-  join(netfxpath
-       "C:\\Program Files\\Reference Assemblies\\Microsoft\\Framework\\"
-       ".NETFramework\\v4.0")
+  set(netfxpath "C:\\Program Files\\Reference Assemblies\\Microsoft\\Framework\\.NETFramework\\v4.0")
   file(WRITE run-msbuild.bat "
     ${MSBUILD_SETUP}
     ${CMAKE_MAKE_PROGRAM} -p:FrameworkPathOverride=\"${netfxpath}\" %*")
 endif ()
 
-function(add_headers VAR)
-  set(headers ${${VAR}})
-  foreach (header ${ARGN})
-    set(headers ${headers} include/fmt/${header})
-  endforeach()
-  set(${VAR} ${headers} PARENT_SCOPE)
-endfunction()
-
-# Define the fmt library, its includes and the needed defines.
-add_headers(FMT_HEADERS args.h chrono.h color.h compile.h core.h format.h
-                        format-inl.h os.h ostream.h printf.h ranges.h std.h
-                        xchar.h)
-set(FMT_SOURCES src/format.cc)
-if (FMT_OS)
-  set(FMT_SOURCES ${FMT_SOURCES} src/os.cc)
-endif ()
-
-add_module_library(fmt src/fmt.cc FALLBACK
-                   ${FMT_SOURCES} ${FMT_HEADERS} README.md ChangeLog.md
-                   IF FMT_MODULE)
-add_library(fmt::fmt ALIAS fmt)
-if (FMT_MODULE)
-  enable_module(fmt)
-endif ()
-
-if (FMT_WERROR)
-  target_compile_options(fmt PRIVATE ${WERROR_FLAG})
-endif ()
-if (FMT_PEDANTIC)
-  target_compile_options(fmt PRIVATE ${PEDANTIC_COMPILE_FLAGS})
-endif ()
-
-if (cxx_std_11 IN_LIST CMAKE_CXX_COMPILE_FEATURES)
-  target_compile_features(fmt PUBLIC cxx_std_11)
+include(CheckSymbolExists)
+if (WIN32)
+  check_symbol_exists(open io.h HAVE_OPEN)
 else ()
-  message(WARNING "Feature cxx_std_11 is unknown for the CXX compiler")
+  check_symbol_exists(open fcntl.h HAVE_OPEN)
 endif ()
+check_symbol_exists(strtod_l stdlib.h HAVE_STRTOD_L)
 
-target_include_directories(fmt ${FMT_SYSTEM_HEADERS_ATTRIBUTE} PUBLIC
-  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-  $<INSTALL_INTERFACE:${FMT_INC_DIR}>)
-
-set(FMT_DEBUG_POSTFIX d CACHE STRING "Debug library postfix.")
-
-set_target_properties(fmt PROPERTIES
-  VERSION ${FMT_VERSION} SOVERSION ${CPACK_PACKAGE_VERSION_MAJOR}
-  PUBLIC_HEADER "${FMT_HEADERS}"
-  DEBUG_POSTFIX "${FMT_DEBUG_POSTFIX}"
-
-  # Workaround for Visual Studio 2017:
-  # Ensure the .pdb is created with the same name and in the same directory
-  # as the .lib. Newer VS versions already do this by default, but there is no
-  # harm in setting it for those too. Ignored by other generators.
-  COMPILE_PDB_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}"
-  COMPILE_PDB_NAME "fmt"
-  COMPILE_PDB_NAME_DEBUG "fmt${FMT_DEBUG_POSTFIX}")
-
-# Set FMT_LIB_NAME for pkg-config fmt.pc. We cannot use the OUTPUT_NAME target
-# property because it's not set by default.
-set(FMT_LIB_NAME fmt)
-if (CMAKE_BUILD_TYPE STREQUAL "Debug")
-  set(FMT_LIB_NAME ${FMT_LIB_NAME}${FMT_DEBUG_POSTFIX})
-endif ()
-
-if (BUILD_SHARED_LIBS)
-  target_compile_definitions(fmt PRIVATE FMT_LIB_EXPORT INTERFACE FMT_SHARED)
-endif ()
-if (FMT_SAFE_DURATION_CAST)
-  target_compile_definitions(fmt PUBLIC FMT_SAFE_DURATION_CAST)
-endif ()
-
-add_library(fmt-header-only INTERFACE)
-add_library(fmt::fmt-header-only ALIAS fmt-header-only)
-
-target_compile_definitions(fmt-header-only INTERFACE FMT_HEADER_ONLY=1)
-target_compile_features(fmt-header-only INTERFACE cxx_std_11)
-
-target_include_directories(fmt-header-only
-  ${FMT_SYSTEM_HEADERS_ATTRIBUTE} INTERFACE
-  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
-  $<INSTALL_INTERFACE:${FMT_INC_DIR}>)
-
-# Install targets.
-if (FMT_INSTALL)
-  include(CMakePackageConfigHelpers)
-  set_verbose(FMT_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/fmt CACHE STRING
-              "Installation directory for cmake files, a relative path that "
-              "will be joined with ${CMAKE_INSTALL_PREFIX} or an absolute "
-              "path.")
-  set(version_config ${PROJECT_BINARY_DIR}/fmt-config-version.cmake)
-  set(project_config ${PROJECT_BINARY_DIR}/fmt-config.cmake)
-  set(pkgconfig ${PROJECT_BINARY_DIR}/fmt.pc)
-  set(targets_export_name fmt-targets)
-
-  set_verbose(FMT_LIB_DIR ${CMAKE_INSTALL_LIBDIR} CACHE STRING
-              "Installation directory for libraries, a relative path that "
-              "will be joined to ${CMAKE_INSTALL_PREFIX} or an absolute path.")
-
-  set_verbose(FMT_PKGCONFIG_DIR ${CMAKE_INSTALL_LIBDIR}/pkgconfig CACHE STRING
-              "Installation directory for pkgconfig (.pc) files, a relative "
-              "path that will be joined with ${CMAKE_INSTALL_PREFIX} or an "
-              "absolute path.")
-
-  # Generate the version, config and target files into the build directory.
-  write_basic_package_version_file(
-    ${version_config}
-    VERSION ${FMT_VERSION}
-    COMPATIBILITY AnyNewerVersion)
-
-  join_paths(libdir_for_pc_file "\${exec_prefix}" "${FMT_LIB_DIR}")
-  join_paths(includedir_for_pc_file "\${prefix}" "${FMT_INC_DIR}")
-
-  configure_file(
-    "${PROJECT_SOURCE_DIR}/support/cmake/fmt.pc.in"
-    "${pkgconfig}"
-    @ONLY)
-  configure_package_config_file(
-    ${PROJECT_SOURCE_DIR}/support/cmake/fmt-config.cmake.in
-    ${project_config}
-    INSTALL_DESTINATION ${FMT_CMAKE_DIR})
-
-  set(INSTALL_TARGETS fmt fmt-header-only)
-
-  # Install the library and headers.
-  install(TARGETS ${INSTALL_TARGETS} EXPORT ${targets_export_name}
-          LIBRARY DESTINATION ${FMT_LIB_DIR}
-          ARCHIVE DESTINATION ${FMT_LIB_DIR}
-          PUBLIC_HEADER DESTINATION "${FMT_INC_DIR}/fmt"
-          RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR})
-
-  # Use a namespace because CMake provides better diagnostics for namespaced
-  # imported targets.
-  export(TARGETS ${INSTALL_TARGETS} NAMESPACE fmt::
-         FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake)
-
-  # Install version, config and target files.
-  install(
-    FILES ${project_config} ${version_config}
-    DESTINATION ${FMT_CMAKE_DIR})
-  install(EXPORT ${targets_export_name} DESTINATION ${FMT_CMAKE_DIR}
-          NAMESPACE fmt::)
-
-  install(FILES "${pkgconfig}" DESTINATION "${FMT_PKGCONFIG_DIR}")
-endif ()
+add_subdirectory(fmt)
 
 if (FMT_DOC)
   add_subdirectory(doc)
@@ -419,23 +106,11 @@ if (FMT_TEST)
   add_subdirectory(test)
 endif ()
 
-# Control fuzzing independent of the unit tests.
-if (FMT_FUZZ)
-  add_subdirectory(test/fuzzing)
-
-  # The FMT_FUZZ macro is used to prevent resource exhaustion in fuzzing
-  # mode and make fuzzing practically possible. It is similar to
-  # FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION but uses a different name to
-  # avoid interfering with fuzzing of projects that use {fmt}.
-  # See also https://llvm.org/docs/LibFuzzer.html#fuzzer-friendly-build-mode.
-  target_compile_definitions(fmt PUBLIC FMT_FUZZ)
-endif ()
-
 set(gitignore ${PROJECT_SOURCE_DIR}/.gitignore)
-if (FMT_MASTER_PROJECT AND EXISTS ${gitignore})
+if (MASTER_PROJECT AND EXISTS ${gitignore})
   # Get the list of ignored files from .gitignore.
   file (STRINGS ${gitignore} lines)
-  list(REMOVE_ITEM lines /doc/html)
+  LIST(REMOVE_ITEM lines /doc/html)
   foreach (line ${lines})
     string(REPLACE "." "[.]" line "${line}")
     string(REPLACE "*" ".*" line "${line}")
@@ -448,6 +123,6 @@ if (FMT_MASTER_PROJECT AND EXISTS ${gitignore})
   set(CPACK_SOURCE_IGNORE_FILES ${ignored_files})
   set(CPACK_SOURCE_PACKAGE_FILE_NAME fmt-${FMT_VERSION})
   set(CPACK_PACKAGE_NAME fmt)
-  set(CPACK_RESOURCE_FILE_README ${PROJECT_SOURCE_DIR}/README.md)
+  set(CPACK_RESOURCE_FILE_README ${PROJECT_SOURCE_DIR}/README.rst)
   include(CPack)
 endif ()
diff --git a/3party/fmt/CONTRIBUTING.md b/3party/fmt/CONTRIBUTING.md
deleted file mode 100644
index b82f145..0000000
--- a/3party/fmt/CONTRIBUTING.md
+++ /dev/null
@@ -1,20 +0,0 @@
-Contributing to {fmt}
-=====================
-
-By submitting a pull request or a patch, you represent that you have the right
-to license your contribution to the {fmt} project owners and the community,
-agree that your contributions are licensed under the {fmt} license, and agree
-to future changes to the licensing.
-
-All C++ code must adhere to [Google C++ Style Guide](
-https://google.github.io/styleguide/cppguide.html) with the following
-exceptions:
-
-* Exceptions are permitted
-* snake_case should be used instead of UpperCamelCase for function and type
-  names
-
-All documentation must adhere to the [Google Developer Documentation Style
-Guide](https://developers.google.com/style).
-
-Thanks for contributing!
diff --git a/3party/fmt/ChangeLog.md b/3party/fmt/ChangeLog.md
deleted file mode 100644
index 515f9fd..0000000
--- a/3party/fmt/ChangeLog.md
+++ /dev/null
@@ -1,5533 +0,0 @@
-# 10.2.1 - 2024-01-03
-
--   Fixed ABI compatibility with earlier 10.x versions
-    (https://github.com/fmtlib/fmt/pull/3786). Thanks @saraedum.
-
-# 10.2.0 - 2024-01-01
-
--   Added support for the `%j` specifier (the number of days) for
-    `std::chrono::duration` (https://github.com/fmtlib/fmt/issues/3643,
-    https://github.com/fmtlib/fmt/pull/3732). Thanks @intelfx.
-
--   Added support for the chrono suffix for days and changed
-    the suffix for minutes from "m" to the correct "min"
-    (https://github.com/fmtlib/fmt/issues/3662,
-    https://github.com/fmtlib/fmt/pull/3664).
-    For example ([godbolt](https://godbolt.org/z/9KhMnq9ba)):
-
-    ```c++
-    #include <fmt/chrono.h>
-
-    int main() {
-      fmt::print("{}\n", std::chrono::days(42)); // prints "42d"
-    }
-    ```
-
-    Thanks @Richardk2n.
-
--   Fixed an overflow in `std::chrono::time_point` formatting with large dates
-    (https://github.com/fmtlib/fmt/issues/3725,
-    https://github.com/fmtlib/fmt/pull/3727). Thanks @cschreib.
-
--   Added a formatter for `std::source_location`
-    (https://github.com/fmtlib/fmt/pull/3730).
-    For example ([godbolt](https://godbolt.org/z/YajfKjhhr)):
-
-    ```c++
-    #include <source_location>
-    #include <fmt/std.h>
-
-    int main() {
-      fmt::print("{}\n", std::source_location::current());
-    }
-    ```
-
-    prints
-
-    ```
-    /app/example.cpp:5:51: int main()
-    ```
-
-    Thanks @felix642.
-
--   Added a formatter for `std::bitset`
-    (https://github.com/fmtlib/fmt/pull/3660).
-    For example ([godbolt](https://godbolt.org/z/bdEaGeYxe)):
-
-    ```c++
-    #include <bitset>
-    #include <fmt/std.h>
-
-    int main() {
-      fmt::print("{}\n", std::bitset<6>(42)); // prints "101010"
-    }
-    ```
-
-    Thanks @muggenhor.
-
--   Added an experimental `nested_formatter` that provides an easy way of
-    applying a formatter to one or more subobjects while automatically handling
-    width, fill and alignment. For example:
-
-    ```c++
-    #include <fmt/format.h>
-
-    struct point {
-      double x, y;
-    };
-
-    template <>
-    struct fmt::formatter<point> : nested_formatter<double> {
-      auto format(point p, format_context& ctx) const {
-        return write_padded(ctx, [=](auto out) {
-          return format_to(out, "({}, {})", nested(p.x), nested(p.y));
-        });
-      }
-    };
-
-    int main() {
-      fmt::print("[{:>20.2f}]", point{1, 2});
-    }
-    ```
-
-    prints
-
-    ```
-    [          (1.00, 2.00)]
-    ```
-
--   Added the generic representation (`g`) to `std::filesystem::path`
-    (https://github.com/fmtlib/fmt/issues/3715,
-    https://github.com/fmtlib/fmt/pull/3729). For example:
-
-    ```c++
-    #include <filesystem>
-    #include <fmt/std.h>
-
-    int main() {
-      fmt::print("{:g}\n", std::filesystem::path("C:\\foo"));
-    }
-    ```
-
-    prints `"C:/foo"` on Windows.
-
-    Thanks @js324.
-
--   Made `format_as` work with references
-    (https://github.com/fmtlib/fmt/pull/3739). Thanks @tchaikov.
-
--   Fixed formatting of invalid UTF-8 with precision
-    (https://github.com/fmtlib/fmt/issues/3284).
-
--   Fixed an inconsistency between `fmt::to_string` and `fmt::format`
-    (https://github.com/fmtlib/fmt/issues/3684).
-
--   Disallowed unsafe uses of `fmt::styled`
-    (https://github.com/fmtlib/fmt/issues/3625):
-
-    ```c++
-    auto s = fmt::styled(std::string("dangle"), fmt::emphasis::bold);
-    fmt::print("{}\n", s); // compile error
-    ```
-
-    Pass `fmt::styled(...)` as a parameter instead.
-
--   Added a null check when formatting a C string with the `s` specifier
-    (https://github.com/fmtlib/fmt/issues/3706).
-
--   Disallowed the `c` specifier for `bool`
-    (https://github.com/fmtlib/fmt/issues/3726,
-    https://github.com/fmtlib/fmt/pull/3734). Thanks @js324.
-
--   Made the default formatting unlocalized in `fmt::ostream_formatter` for
-    consistency with the rest of the library
-    (https://github.com/fmtlib/fmt/issues/3460).
-
--   Fixed localized formatting in bases other than decimal
-    (https://github.com/fmtlib/fmt/issues/3693,
-    https://github.com/fmtlib/fmt/pull/3750). Thanks @js324.
-
--   Fixed a performance regression in experimental `fmt::ostream::print`
-    (https://github.com/fmtlib/fmt/issues/3674).
-
--   Added synchronization with the underlying output stream when writing to
-    the Windows console
-    (https://github.com/fmtlib/fmt/pull/3668,
-    https://github.com/fmtlib/fmt/issues/3688,
-    https://github.com/fmtlib/fmt/pull/3689).
-    Thanks @Roman-Koshelev and @dimztimz.
-
--   Changed to only export `format_error` when {fmt} is built as a shared
-    library (https://github.com/fmtlib/fmt/issues/3626,
-    https://github.com/fmtlib/fmt/pull/3627). Thanks @phprus.
-
--   Made `fmt::streamed` `constexpr`.
-    (https://github.com/fmtlib/fmt/pull/3650). Thanks @muggenhor.
-
--   Enabled `consteval` on older versions of MSVC
-    (https://github.com/fmtlib/fmt/pull/3757). Thanks @phprus.
-
--   Added an option to build without `wchar_t` support on Windows
-    (https://github.com/fmtlib/fmt/issues/3631,
-    https://github.com/fmtlib/fmt/pull/3636). Thanks @glebm.
-
--   Improved build and CI configuration
-    (https://github.com/fmtlib/fmt/pull/3679,
-    https://github.com/fmtlib/fmt/issues/3701,
-    https://github.com/fmtlib/fmt/pull/3702,
-    https://github.com/fmtlib/fmt/pull/3749).
-    Thanks @jcar87, @pklima and @tchaikov.
-
--   Fixed various warnings, compilation and test issues
-    (https://github.com/fmtlib/fmt/issues/3607,
-    https://github.com/fmtlib/fmt/pull/3610,
-    https://github.com/fmtlib/fmt/pull/3624,
-    https://github.com/fmtlib/fmt/pull/3630,
-    https://github.com/fmtlib/fmt/pull/3634,
-    https://github.com/fmtlib/fmt/pull/3638,
-    https://github.com/fmtlib/fmt/issues/3645,
-    https://github.com/fmtlib/fmt/issues/3646,
-    https://github.com/fmtlib/fmt/pull/3647,
-    https://github.com/fmtlib/fmt/pull/3652,
-    https://github.com/fmtlib/fmt/issues/3654,
-    https://github.com/fmtlib/fmt/pull/3663,
-    https://github.com/fmtlib/fmt/issues/3670,
-    https://github.com/fmtlib/fmt/pull/3680,
-    https://github.com/fmtlib/fmt/issues/3694,
-    https://github.com/fmtlib/fmt/pull/3695,
-    https://github.com/fmtlib/fmt/pull/3699,
-    https://github.com/fmtlib/fmt/issues/3705,
-    https://github.com/fmtlib/fmt/issues/3710,
-    https://github.com/fmtlib/fmt/issues/3712,
-    https://github.com/fmtlib/fmt/pull/3713,
-    https://github.com/fmtlib/fmt/issues/3714,
-    https://github.com/fmtlib/fmt/pull/3716,
-    https://github.com/fmtlib/fmt/pull/3723,
-    https://github.com/fmtlib/fmt/issues/3738,
-    https://github.com/fmtlib/fmt/issues/3740,
-    https://github.com/fmtlib/fmt/pull/3741,
-    https://github.com/fmtlib/fmt/pull/3743,
-    https://github.com/fmtlib/fmt/issues/3745,
-    https://github.com/fmtlib/fmt/pull/3747,
-    https://github.com/fmtlib/fmt/pull/3748,
-    https://github.com/fmtlib/fmt/pull/3751,
-    https://github.com/fmtlib/fmt/pull/3754,
-    https://github.com/fmtlib/fmt/pull/3755,
-    https://github.com/fmtlib/fmt/issues/3760,
-    https://github.com/fmtlib/fmt/pull/3762,
-    https://github.com/fmtlib/fmt/issues/3763,
-    https://github.com/fmtlib/fmt/pull/3764,
-    https://github.com/fmtlib/fmt/issues/3774,
-    https://github.com/fmtlib/fmt/pull/3779).
-    Thanks @danakj, @vinayyadav3016, @cyyever, @phprus, @qimiko, @saschasc,
-    @gsjaardema, @lazka, @Zhaojun-Liu, @carlsmedstad, @hotwatermorning,
-    @cptFracassa, @kuguma, @PeterJohnson, @H1X4Dev, @asantoni, @eltociear,
-    @msimberg, @tchaikov, @waywardmonkeys.
-
--   Improved documentation and README
-    (https://github.com/fmtlib/fmt/issues/2086,
-    https://github.com/fmtlib/fmt/issues/3637,
-    https://github.com/fmtlib/fmt/pull/3642,
-    https://github.com/fmtlib/fmt/pull/3653,
-    https://github.com/fmtlib/fmt/pull/3655,
-    https://github.com/fmtlib/fmt/pull/3661,
-    https://github.com/fmtlib/fmt/issues/3673,
-    https://github.com/fmtlib/fmt/pull/3677,
-    https://github.com/fmtlib/fmt/pull/3737,
-    https://github.com/fmtlib/fmt/issues/3742,
-    https://github.com/fmtlib/fmt/pull/3744).
-    Thanks @idzm, @perlun, @joycebrum, @fennewald, @reinhardt1053, @GeorgeLS.
-
--   Updated CI dependencies
-    (https://github.com/fmtlib/fmt/pull/3615,
-    https://github.com/fmtlib/fmt/pull/3622,
-    https://github.com/fmtlib/fmt/pull/3623,
-    https://github.com/fmtlib/fmt/pull/3666,
-    https://github.com/fmtlib/fmt/pull/3696,
-    https://github.com/fmtlib/fmt/pull/3697,
-    https://github.com/fmtlib/fmt/pull/3759,
-    https://github.com/fmtlib/fmt/pull/3782).
-
-# 10.1.1 - 2023-08-28
-
--   Added formatters for `std::atomic` and `atomic_flag`
-    (https://github.com/fmtlib/fmt/pull/3574,
-    https://github.com/fmtlib/fmt/pull/3594).
-    Thanks @wangzw and @AlexGuteniev.
--   Fixed an error about partial specialization of `formatter<string>`
-    after instantiation when compiled with gcc and C++20
-    (https://github.com/fmtlib/fmt/issues/3584).
--   Fixed compilation as a C++20 module with gcc and clang
-    (https://github.com/fmtlib/fmt/issues/3587,
-    https://github.com/fmtlib/fmt/pull/3597,
-    https://github.com/fmtlib/fmt/pull/3605).
-    Thanks @MathewBensonCode.
--   Made `fmt::to_string` work with types that have `format_as`
-    overloads (https://github.com/fmtlib/fmt/pull/3575). Thanks @phprus.
--   Made `formatted_size` work with integral format specifiers at
-    compile time (https://github.com/fmtlib/fmt/pull/3591).
-    Thanks @elbeno.
--   Fixed a warning about the `no_unique_address` attribute on clang-cl
-    (https://github.com/fmtlib/fmt/pull/3599). Thanks @lukester1975.
--   Improved compatibility with the legacy GBK encoding
-    (https://github.com/fmtlib/fmt/issues/3598,
-    https://github.com/fmtlib/fmt/pull/3599). Thanks @YuHuanTin.
--   Added OpenSSF Scorecard analysis
-    (https://github.com/fmtlib/fmt/issues/3530,
-    https://github.com/fmtlib/fmt/pull/3571). Thanks @joycebrum.
--   Updated CI dependencies
-    (https://github.com/fmtlib/fmt/pull/3591,
-    https://github.com/fmtlib/fmt/pull/3592,
-    https://github.com/fmtlib/fmt/pull/3593,
-    https://github.com/fmtlib/fmt/pull/3602).
-
-# 10.1.0 - 2023-08-12
-
--   Optimized format string compilation resulting in up to 40% speed up
-    in compiled `format_to` and \~4x speed up in compiled `format_to_n`
-    on a concatenation benchmark
-    (https://github.com/fmtlib/fmt/issues/3133,
-    https://github.com/fmtlib/fmt/issues/3484).
-
-    {fmt} 10.0:
-
-        ---------------------------------------------------------
-        Benchmark               Time             CPU   Iterations
-        ---------------------------------------------------------
-        BM_format_to         78.9 ns         78.9 ns      8881746
-        BM_format_to_n        568 ns          568 ns      1232089
-
-    {fmt} 10.1:
-
-        ---------------------------------------------------------
-        Benchmark               Time             CPU   Iterations
-        ---------------------------------------------------------
-        BM_format_to         54.9 ns         54.9 ns     12727944
-        BM_format_to_n        133 ns          133 ns      5257795
-
--   Optimized storage of an empty allocator in `basic_memory_buffer`
-    (https://github.com/fmtlib/fmt/pull/3485). Thanks @Minty-Meeo.
-
--   Added formatters for proxy references to elements of
-    `std::vector<bool>` and `std::bitset<N>`
-    (https://github.com/fmtlib/fmt/issues/3567,
-    https://github.com/fmtlib/fmt/pull/3570). For example
-    ([godbolt](https://godbolt.org/z/zYb79Pvn8)):
-
-    ```c++
-    #include <vector>
-    #include <fmt/std.h>
-
-    int main() {
-      auto v = std::vector<bool>{true};
-      fmt::print("{}", v[0]);
-    }
-    ```
-
-    Thanks @phprus and @felix642.
-
--   Fixed an ambiguous formatter specialization for containers that look
-    like container adaptors such as `boost::flat_set`
-    (https://github.com/fmtlib/fmt/issues/3556,
-    https://github.com/fmtlib/fmt/pull/3561). Thanks @5chmidti.
-
--   Fixed compilation when formatting durations not convertible from
-    `std::chrono::seconds`
-    (https://github.com/fmtlib/fmt/pull/3430). Thanks @patlkli.
-
--   Made the `formatter` specialization for `char*` const-correct
-    (https://github.com/fmtlib/fmt/pull/3432). Thanks @timsong-cpp.
-
--   Made `{}` and `{:}` handled consistently during compile-time checks
-    (https://github.com/fmtlib/fmt/issues/3526).
-
--   Disallowed passing temporaries to `make_format_args` to improve API
-    safety by preventing dangling references.
-
--   Improved the compile-time error for unformattable types
-    (https://github.com/fmtlib/fmt/pull/3478). Thanks @BRevzin.
-
--   Improved the floating-point formatter
-    (https://github.com/fmtlib/fmt/pull/3448,
-    https://github.com/fmtlib/fmt/pull/3450).
-    Thanks @florimond-collette.
-
--   Fixed handling of precision for `long double` larger than 64 bits.
-    (https://github.com/fmtlib/fmt/issues/3539,
-    https://github.com/fmtlib/fmt/issues/3564).
-
--   Made floating-point and chrono tests less platform-dependent
-    (https://github.com/fmtlib/fmt/issues/3337,
-    https://github.com/fmtlib/fmt/issues/3433,
-    https://github.com/fmtlib/fmt/pull/3434). Thanks @phprus.
-
--   Removed the remnants of the Grisu floating-point formatter that has
-    been replaced by Dragonbox in earlier versions.
-
--   Added `throw_format_error` to the public API
-    (https://github.com/fmtlib/fmt/pull/3551). Thanks @mjerabek.
-
--   Made `FMT_THROW` assert even if assertions are disabled when
-    compiling with exceptions disabled
-    (https://github.com/fmtlib/fmt/issues/3418,
-    https://github.com/fmtlib/fmt/pull/3439). Thanks @BRevzin.
-
--   Made `format_as` and `std::filesystem::path` formatter work with
-    exotic code unit types.
-    (https://github.com/fmtlib/fmt/pull/3457,
-    https://github.com/fmtlib/fmt/pull/3476). Thanks @gix and @hmbj.
-
--   Added support for the `?` format specifier to
-    `std::filesystem::path` and made the default unescaped for
-    consistency with strings.
-
--   Deprecated the wide stream overload of `printf`.
-
--   Removed unused `basic_printf_parse_context`.
-
--   Improved RTTI detection used when formatting exceptions
-    (https://github.com/fmtlib/fmt/pull/3468). Thanks @danakj.
-
--   Improved compatibility with VxWorks7
-    (https://github.com/fmtlib/fmt/pull/3467). Thanks @wenshan1.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/issues/3174,
-    https://github.com/fmtlib/fmt/issues/3423,
-    https://github.com/fmtlib/fmt/pull/3454,
-    https://github.com/fmtlib/fmt/issues/3458,
-    https://github.com/fmtlib/fmt/pull/3461,
-    https://github.com/fmtlib/fmt/issues/3487,
-    https://github.com/fmtlib/fmt/pull/3515).
-    Thanks @zencatalyst, @rlalik and @mikecrowe.
-
--   Improved build and CI configurations
-    (https://github.com/fmtlib/fmt/issues/3449,
-    https://github.com/fmtlib/fmt/pull/3451,
-    https://github.com/fmtlib/fmt/pull/3452,
-    https://github.com/fmtlib/fmt/pull/3453,
-    https://github.com/fmtlib/fmt/pull/3459,
-    https://github.com/fmtlib/fmt/issues/3481,
-    https://github.com/fmtlib/fmt/pull/3486,
-    https://github.com/fmtlib/fmt/issues/3489,
-    https://github.com/fmtlib/fmt/pull/3496,
-    https://github.com/fmtlib/fmt/issues/3517,
-    https://github.com/fmtlib/fmt/pull/3523,
-    https://github.com/fmtlib/fmt/pull/3563).
-    Thanks @joycebrum, @glebm, @phprus, @petrmanek, @setoye and @abouvier.
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/issues/3408,
-    https://github.com/fmtlib/fmt/issues/3424,
-    https://github.com/fmtlib/fmt/issues/3444,
-    https://github.com/fmtlib/fmt/pull/3446,
-    https://github.com/fmtlib/fmt/pull/3475,
-    https://github.com/fmtlib/fmt/pull/3482,
-    https://github.com/fmtlib/fmt/issues/3492,
-    https://github.com/fmtlib/fmt/pull/3493,
-    https://github.com/fmtlib/fmt/pull/3508,
-    https://github.com/fmtlib/fmt/issues/3509,
-    https://github.com/fmtlib/fmt/issues/3533,
-    https://github.com/fmtlib/fmt/pull/3542,
-    https://github.com/fmtlib/fmt/issues/3543,
-    https://github.com/fmtlib/fmt/issues/3540,
-    https://github.com/fmtlib/fmt/pull/3544,
-    https://github.com/fmtlib/fmt/issues/3548,
-    https://github.com/fmtlib/fmt/pull/3549,
-    https://github.com/fmtlib/fmt/pull/3550,
-    https://github.com/fmtlib/fmt/pull/3552).
-    Thanks @adesitter, @hmbj, @Minty-Meeo, @phprus, @TobiSchluter,
-    @kieranclancy, @alexeedm, @jurihock, @Ozomahtli and @razaqq.
-
-# 10.0.0 - 2023-05-09
-
--   Replaced Grisu with a new floating-point formatting algorithm for
-    given precision (https://github.com/fmtlib/fmt/issues/3262,
-    https://github.com/fmtlib/fmt/issues/2750,
-    https://github.com/fmtlib/fmt/pull/3269,
-    https://github.com/fmtlib/fmt/pull/3276). The new algorithm
-    is based on Dragonbox already used for the shortest representation
-    and gives substantial performance improvement:
-
-    ![](https://user-images.githubusercontent.com/33922675/211956670-84891a09-6867-47d9-82fc-3230da7abe0f.png)
-
-    -   Red: new algorithm
-    -   Green: new algorithm with `FMT_USE_FULL_CACHE_DRAGONBOX` defined
-        to 1
-    -   Blue: old algorithm
-
-    Thanks @jk-jeon.
-
--   Replaced `snprintf`-based hex float formatter with an internal
-    implementation (https://github.com/fmtlib/fmt/pull/3179,
-    https://github.com/fmtlib/fmt/pull/3203). This removes the
-    last usage of `s(n)printf` in {fmt}. Thanks @phprus.
-
--   Fixed alignment of floating-point numbers with localization
-    (https://github.com/fmtlib/fmt/issues/3263,
-    https://github.com/fmtlib/fmt/pull/3272). Thanks @ShawnZhong.
-
--   Made handling of `#` consistent with `std::format`.
-
--   Improved C++20 module support
-    (https://github.com/fmtlib/fmt/pull/3134,
-    https://github.com/fmtlib/fmt/pull/3254,
-    https://github.com/fmtlib/fmt/pull/3386,
-    https://github.com/fmtlib/fmt/pull/3387,
-    https://github.com/fmtlib/fmt/pull/3388,
-    https://github.com/fmtlib/fmt/pull/3392,
-    https://github.com/fmtlib/fmt/pull/3397,
-    https://github.com/fmtlib/fmt/pull/3399,
-    https://github.com/fmtlib/fmt/pull/3400).
-    Thanks @laitingsheng, @Orvid and @DanielaE.
-    
--   Switched to the [modules CMake library](https://github.com/vitaut/modules)
-    which allows building {fmt} as a C++20 module with clang:
-
-        CXX=clang++ cmake -DFMT_MODULE=ON .
-        make
-
--   Made `format_as` work with any user-defined type and not just enums.
-    For example ([godbolt](https://godbolt.org/z/b7rqhq5Kh)):
-
-    ```c++
-    #include <fmt/format.h>
-
-    struct floaty_mc_floatface {
-      double value;
-    };
-
-    auto format_as(floaty_mc_floatface f) { return f.value; }
-
-    int main() {
-      fmt::print("{:8}\n", floaty_mc_floatface{0.42}); // prints "    0.42"
-    }
-    ```
-
--   Removed deprecated implicit conversions for enums and conversions to
-    primitive types for compatibility with `std::format` and to prevent
-    potential ODR violations. Use `format_as` instead.
-
--   Added support for fill, align and width to the time point formatter
-    (https://github.com/fmtlib/fmt/issues/3237,
-    https://github.com/fmtlib/fmt/pull/3260,
-    https://github.com/fmtlib/fmt/pull/3275). For example
-    ([godbolt](https://godbolt.org/z/rKP6MGz6c)):
-
-    ```c++
-    #include <fmt/chrono.h>
-
-    int main() {
-      // prints "    2023"
-      fmt::print("{:>8%Y}\n", std::chrono::system_clock::now());
-    }
-    ```
-
-    Thanks @ShawnZhong.
-
--   Implemented formatting of subseconds
-    (https://github.com/fmtlib/fmt/issues/2207,
-    https://github.com/fmtlib/fmt/issues/3117,
-    https://github.com/fmtlib/fmt/pull/3115,
-    https://github.com/fmtlib/fmt/pull/3143,
-    https://github.com/fmtlib/fmt/pull/3144,
-    https://github.com/fmtlib/fmt/pull/3349). For example
-    ([godbolt](https://godbolt.org/z/45738oGEo)):
-
-    ```c++
-    #include <fmt/chrono.h>
-
-    int main() {
-      // prints 01.234567
-      fmt::print("{:%S}\n", std::chrono::microseconds(1234567));
-    }
-    ```
-
-    Thanks @patrickroocks @phprus and @BRevzin.
-
--   Added precision support to `%S`
-    (https://github.com/fmtlib/fmt/pull/3148). Thanks @SappyJoy
-
--   Added support for `std::utc_time`
-    (https://github.com/fmtlib/fmt/issues/3098,
-    https://github.com/fmtlib/fmt/pull/3110). Thanks @patrickroocks.
-
--   Switched formatting of `std::chrono::system_clock` from local time
-    to UTC for compatibility with the standard
-    (https://github.com/fmtlib/fmt/issues/3199,
-    https://github.com/fmtlib/fmt/pull/3230). Thanks @ned14.
-
--   Added support for `%Ez` and `%Oz` to chrono formatters.
-    (https://github.com/fmtlib/fmt/issues/3220,
-    https://github.com/fmtlib/fmt/pull/3222). Thanks @phprus.
-
--   Improved validation of format specifiers for `std::chrono::duration`
-    (https://github.com/fmtlib/fmt/issues/3219,
-    https://github.com/fmtlib/fmt/pull/3232). Thanks @ShawnZhong.
-
--   Fixed formatting of time points before the epoch
-    (https://github.com/fmtlib/fmt/issues/3117,
-    https://github.com/fmtlib/fmt/pull/3261). For example
-    ([godbolt](https://godbolt.org/z/f7bcznb3W)):
-
-    ```c++
-    #include <fmt/chrono.h>
-
-    int main() {
-      auto t = std::chrono::system_clock::from_time_t(0) -
-               std::chrono::milliseconds(250);
-      fmt::print("{:%S}\n", t); // prints 59.750000000
-    }
-    ```
-
-    Thanks @ShawnZhong.
-
--   Experimental: implemented glibc extension for padding seconds,
-    minutes and hours
-    (https://github.com/fmtlib/fmt/issues/2959,
-    https://github.com/fmtlib/fmt/pull/3271). Thanks @ShawnZhong.
-
--   Added a formatter for `std::exception`
-    (https://github.com/fmtlib/fmt/issues/2977,
-    https://github.com/fmtlib/fmt/issues/3012,
-    https://github.com/fmtlib/fmt/pull/3062,
-    https://github.com/fmtlib/fmt/pull/3076,
-    https://github.com/fmtlib/fmt/pull/3119). For example
-    ([godbolt](https://godbolt.org/z/8xoWGs9e4)):
-
-    ```c++
-    #include <fmt/std.h>
-    #include <vector>
-
-    int main() {
-      try {
-        std::vector<bool>().at(0);
-      } catch(const std::exception& e) {
-        fmt::print("{}", e);
-      }
-    }
-    ```
-
-    prints:
-
-        vector<bool>::_M_range_check: __n (which is 0) >= this->size() (which is 0)
-
-    on libstdc++. Thanks @zach2good and @phprus.
-
--   Moved `std::error_code` formatter from `fmt/os.h` to `fmt/std.h`.
-    (https://github.com/fmtlib/fmt/pull/3125). Thanks @phprus.
-
--   Added formatters for standard container adapters:
-    `std::priority_queue`, `std::queue` and `std::stack`
-    (https://github.com/fmtlib/fmt/issues/3215,
-    https://github.com/fmtlib/fmt/pull/3279). For example
-    ([godbolt](https://godbolt.org/z/74h1xY9qK)):
-
-    ```c++
-    #include <fmt/ranges.h>
-    #include <stack>
-    #include <vector>
-
-    int main() {
-      auto s = std::stack<bool, std::vector<bool>>();
-      for (auto b: {true, false, true}) s.push(b);
-      fmt::print("{}\n", s); // prints [true, false, true]
-    }
-    ```
-
-    Thanks @ShawnZhong.
-
--   Added a formatter for `std::optional` to `fmt/std.h`
-    (https://github.com/fmtlib/fmt/issues/1367,
-    https://github.com/fmtlib/fmt/pull/3303).
-    Thanks @tom-huntington.
-
--   Fixed formatting of valueless by exception variants
-    (https://github.com/fmtlib/fmt/pull/3347). Thanks @TheOmegaCarrot.
-
--   Made `fmt::ptr` accept `unique_ptr` with a custom deleter
-    (https://github.com/fmtlib/fmt/pull/3177). Thanks @hmbj.
-
--   Fixed formatting of noncopyable ranges and nested ranges of chars
-    (https://github.com/fmtlib/fmt/pull/3158
-    https://github.com/fmtlib/fmt/issues/3286,
-    https://github.com/fmtlib/fmt/pull/3290). Thanks @BRevzin.
-
--   Fixed issues with formatting of paths and ranges of paths
-    (https://github.com/fmtlib/fmt/issues/3319,
-    https://github.com/fmtlib/fmt/pull/3321
-    https://github.com/fmtlib/fmt/issues/3322). Thanks @phprus.
-
--   Improved handling of invalid Unicode in paths.
-
--   Enabled compile-time checks on Apple clang 14 and later
-    (https://github.com/fmtlib/fmt/pull/3331). Thanks @cloyce.
-
--   Improved compile-time checks of named arguments
-    (https://github.com/fmtlib/fmt/issues/3105,
-    https://github.com/fmtlib/fmt/pull/3214). Thanks @rbrich.
-
--   Fixed formatting when both alignment and `0` are given
-    (https://github.com/fmtlib/fmt/issues/3236,
-    https://github.com/fmtlib/fmt/pull/3248). Thanks @ShawnZhong.
-
--   Improved Unicode support in the experimental file API on Windows
-    (https://github.com/fmtlib/fmt/issues/3234,
-    https://github.com/fmtlib/fmt/pull/3293). Thanks @Fros1er.
-
--   Unified UTF transcoding
-    (https://github.com/fmtlib/fmt/pull/3416). Thanks @phprus.
-
--   Added support for UTF-8 digit separators via an experimental locale
-    facet (https://github.com/fmtlib/fmt/issues/1861). For
-    example ([godbolt](https://godbolt.org/z/f7bcznb3W)):
-
-    ```c++
-    auto loc = std::locale(
-      std::locale(), new fmt::format_facet<std::locale>("’"));
-    auto s = fmt::format(loc, "{:L}", 1000);
-    ```
-
-    where `’` is U+2019 used as a digit separator in the de_CH locale.
-
--   Added an overload of `formatted_size` that takes a locale
-    (https://github.com/fmtlib/fmt/issues/3084,
-    https://github.com/fmtlib/fmt/pull/3087). Thanks @gerboengels.
-
--   Removed the deprecated `FMT_DEPRECATED_OSTREAM`.
-
--   Fixed a UB when using a null `std::string_view` with
-    `fmt::to_string` or format string compilation
-    (https://github.com/fmtlib/fmt/issues/3241,
-    https://github.com/fmtlib/fmt/pull/3244). Thanks @phprus.
-
--   Added `starts_with` to the fallback `string_view` implementation
-    (https://github.com/fmtlib/fmt/pull/3080). Thanks @phprus.
-
--   Added `fmt::basic_format_string::get()` for compatibility with
-    `basic_format_string`
-    (https://github.com/fmtlib/fmt/pull/3111). Thanks @huangqinjin.
-
--   Added `println` for compatibility with C++23
-    (https://github.com/fmtlib/fmt/pull/3267). Thanks @ShawnZhong.
-
--   Renamed the `FMT_EXPORT` macro for shared library usage to
-    `FMT_LIB_EXPORT`.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/issues/3108,
-    https://github.com/fmtlib/fmt/issues/3169,
-    https://github.com/fmtlib/fmt/pull/3243).
-    https://github.com/fmtlib/fmt/pull/3404).
-    Thanks @Cleroth and @Vertexwahn.
-
--   Improved build configuration and tests
-    (https://github.com/fmtlib/fmt/pull/3118,
-    https://github.com/fmtlib/fmt/pull/3120,
-    https://github.com/fmtlib/fmt/pull/3188,
-    https://github.com/fmtlib/fmt/issues/3189,
-    https://github.com/fmtlib/fmt/pull/3198,
-    https://github.com/fmtlib/fmt/pull/3205,
-    https://github.com/fmtlib/fmt/pull/3207,
-    https://github.com/fmtlib/fmt/pull/3210,
-    https://github.com/fmtlib/fmt/pull/3240,
-    https://github.com/fmtlib/fmt/pull/3256,
-    https://github.com/fmtlib/fmt/pull/3264,
-    https://github.com/fmtlib/fmt/issues/3299,
-    https://github.com/fmtlib/fmt/pull/3302,
-    https://github.com/fmtlib/fmt/pull/3312,
-    https://github.com/fmtlib/fmt/issues/3317,
-    https://github.com/fmtlib/fmt/pull/3328,
-    https://github.com/fmtlib/fmt/pull/3333,
-    https://github.com/fmtlib/fmt/pull/3369,
-    https://github.com/fmtlib/fmt/issues/3373,
-    https://github.com/fmtlib/fmt/pull/3395,
-    https://github.com/fmtlib/fmt/pull/3406,
-    https://github.com/fmtlib/fmt/pull/3411).
-    Thanks @dimztimz, @phprus, @DavidKorczynski, @ChrisThrasher,
-    @FrancoisCarouge, @kennyweiss, @luzpaz, @codeinred, @Mixaill, @joycebrum,
-    @kevinhwang and @Vertexwahn.
-
--   Fixed a regression in handling empty format specifiers after a colon
-    (`{:}`) (https://github.com/fmtlib/fmt/pull/3086). Thanks @oxidase.
-
--   Worked around a broken implementation of
-    `std::is_constant_evaluated` in some versions of libstdc++ on clang
-    (https://github.com/fmtlib/fmt/issues/3247,
-    https://github.com/fmtlib/fmt/pull/3281). Thanks @phprus.
-
--   Fixed formatting of volatile variables
-    (https://github.com/fmtlib/fmt/pull/3068).
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/pull/3057,
-    https://github.com/fmtlib/fmt/pull/3066,
-    https://github.com/fmtlib/fmt/pull/3072,
-    https://github.com/fmtlib/fmt/pull/3082,
-    https://github.com/fmtlib/fmt/pull/3091,
-    https://github.com/fmtlib/fmt/issues/3092,
-    https://github.com/fmtlib/fmt/pull/3093,
-    https://github.com/fmtlib/fmt/pull/3095,
-    https://github.com/fmtlib/fmt/issues/3096,
-    https://github.com/fmtlib/fmt/pull/3097,
-    https://github.com/fmtlib/fmt/issues/3128,
-    https://github.com/fmtlib/fmt/pull/3129,
-    https://github.com/fmtlib/fmt/pull/3137,
-    https://github.com/fmtlib/fmt/pull/3139,
-    https://github.com/fmtlib/fmt/issues/3140,
-    https://github.com/fmtlib/fmt/pull/3142,
-    https://github.com/fmtlib/fmt/issues/3149,
-    https://github.com/fmtlib/fmt/pull/3150,
-    https://github.com/fmtlib/fmt/issues/3154,
-    https://github.com/fmtlib/fmt/issues/3163,
-    https://github.com/fmtlib/fmt/issues/3178,
-    https://github.com/fmtlib/fmt/pull/3184,
-    https://github.com/fmtlib/fmt/pull/3196,
-    https://github.com/fmtlib/fmt/issues/3204,
-    https://github.com/fmtlib/fmt/pull/3206,
-    https://github.com/fmtlib/fmt/pull/3208,
-    https://github.com/fmtlib/fmt/issues/3213,
-    https://github.com/fmtlib/fmt/pull/3216,
-    https://github.com/fmtlib/fmt/issues/3224,
-    https://github.com/fmtlib/fmt/issues/3226,
-    https://github.com/fmtlib/fmt/issues/3228,
-    https://github.com/fmtlib/fmt/pull/3229,
-    https://github.com/fmtlib/fmt/pull/3259,
-    https://github.com/fmtlib/fmt/issues/3274,
-    https://github.com/fmtlib/fmt/issues/3287,
-    https://github.com/fmtlib/fmt/pull/3288,
-    https://github.com/fmtlib/fmt/issues/3292,
-    https://github.com/fmtlib/fmt/pull/3295,
-    https://github.com/fmtlib/fmt/pull/3296,
-    https://github.com/fmtlib/fmt/issues/3298,
-    https://github.com/fmtlib/fmt/issues/3325,
-    https://github.com/fmtlib/fmt/pull/3326,
-    https://github.com/fmtlib/fmt/issues/3334,
-    https://github.com/fmtlib/fmt/issues/3342,
-    https://github.com/fmtlib/fmt/pull/3343,
-    https://github.com/fmtlib/fmt/issues/3351,
-    https://github.com/fmtlib/fmt/pull/3352,
-    https://github.com/fmtlib/fmt/pull/3362,
-    https://github.com/fmtlib/fmt/issues/3365,
-    https://github.com/fmtlib/fmt/pull/3366,
-    https://github.com/fmtlib/fmt/pull/3374,
-    https://github.com/fmtlib/fmt/issues/3377,
-    https://github.com/fmtlib/fmt/pull/3378,
-    https://github.com/fmtlib/fmt/issues/3381,
-    https://github.com/fmtlib/fmt/pull/3398,
-    https://github.com/fmtlib/fmt/pull/3413,
-    https://github.com/fmtlib/fmt/issues/3415).
-    Thanks @phprus, @gsjaardema, @NewbieOrange, @EngineLessCC, @asmaloney,
-    @HazardyKnusperkeks, @sergiud, @Youw, @thesmurph, @czudziakm,
-    @Roman-Koshelev, @chronoxor, @ShawnZhong, @russelltg, @glebm, @tmartin-gh,
-    @Zhaojun-Liu, @louiswins and @mogemimi.
-
-# 9.1.0 - 2022-08-27
-
--   `fmt::formatted_size` now works at compile time
-    (https://github.com/fmtlib/fmt/pull/3026). For example
-    ([godbolt](https://godbolt.org/z/1MW5rMdf8)):
-
-    ```c++
-    #include <fmt/compile.h>
-
-    int main() {
-      using namespace fmt::literals;
-      constexpr size_t n = fmt::formatted_size("{}"_cf, 42);
-      fmt::print("{}\n", n); // prints 2
-    }
-    ```
-
-    Thanks @marksantaniello.
-
--   Fixed handling of invalid UTF-8
-    (https://github.com/fmtlib/fmt/pull/3038,
-    https://github.com/fmtlib/fmt/pull/3044,
-    https://github.com/fmtlib/fmt/pull/3056).
-    Thanks @phprus and @skeeto.
-
--   Improved Unicode support in `ostream` overloads of `print`
-    (https://github.com/fmtlib/fmt/pull/2994,
-    https://github.com/fmtlib/fmt/pull/3001,
-    https://github.com/fmtlib/fmt/pull/3025). Thanks @dimztimz.
-
--   Fixed handling of the sign specifier in localized formatting on
-    systems with 32-bit `wchar_t`
-    (https://github.com/fmtlib/fmt/issues/3041).
-
--   Added support for wide streams to `fmt::streamed`
-    (https://github.com/fmtlib/fmt/pull/2994). Thanks @phprus.
-
--   Added the `n` specifier that disables the output of delimiters when
-    formatting ranges (https://github.com/fmtlib/fmt/pull/2981,
-    https://github.com/fmtlib/fmt/pull/2983). For example
-    ([godbolt](https://godbolt.org/z/roKqGdj8c)):
-
-    ```c++
-    #include <fmt/ranges.h>
-    #include <vector>
-
-    int main() {
-      auto v = std::vector{1, 2, 3};
-      fmt::print("{:n}\n", v); // prints 1, 2, 3
-    }
-    ```
-
-    Thanks @BRevzin.
-
--   Worked around problematic `std::string_view` constructors introduced
-    in C++23 (https://github.com/fmtlib/fmt/issues/3030,
-    https://github.com/fmtlib/fmt/issues/3050). Thanks @strega-nil-ms.
-
--   Improve handling (exclusion) of recursive ranges
-    (https://github.com/fmtlib/fmt/issues/2968,
-    https://github.com/fmtlib/fmt/pull/2974). Thanks @Dani-Hub.
-
--   Improved error reporting in format string compilation
-    (https://github.com/fmtlib/fmt/issues/3055).
-
--   Improved the implementation of
-    [Dragonbox](https://github.com/jk-jeon/dragonbox), the algorithm
-    used for the default floating-point formatting
-    (https://github.com/fmtlib/fmt/pull/2984). Thanks @jk-jeon.
-
--   Fixed issues with floating-point formatting on exotic platforms.
-
--   Improved the implementation of chrono formatting
-    (https://github.com/fmtlib/fmt/pull/3010). Thanks @phprus.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/pull/2966,
-    https://github.com/fmtlib/fmt/pull/3009,
-    https://github.com/fmtlib/fmt/issues/3020,
-    https://github.com/fmtlib/fmt/pull/3037).
-    Thanks @mwinterb, @jcelerier and @remiburtin.
-
--   Improved build configuration
-    (https://github.com/fmtlib/fmt/pull/2991,
-    https://github.com/fmtlib/fmt/pull/2995,
-    https://github.com/fmtlib/fmt/issues/3004,
-    https://github.com/fmtlib/fmt/pull/3007,
-    https://github.com/fmtlib/fmt/pull/3040).
-    Thanks @dimztimz and @hwhsu1231.
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/issues/2969,
-    https://github.com/fmtlib/fmt/pull/2971,
-    https://github.com/fmtlib/fmt/issues/2975,
-    https://github.com/fmtlib/fmt/pull/2982,
-    https://github.com/fmtlib/fmt/pull/2985,
-    https://github.com/fmtlib/fmt/issues/2988,
-    https://github.com/fmtlib/fmt/issues/2989,
-    https://github.com/fmtlib/fmt/issues/3000,
-    https://github.com/fmtlib/fmt/issues/3006,
-    https://github.com/fmtlib/fmt/issues/3014,
-    https://github.com/fmtlib/fmt/issues/3015,
-    https://github.com/fmtlib/fmt/pull/3021,
-    https://github.com/fmtlib/fmt/issues/3023,
-    https://github.com/fmtlib/fmt/pull/3024,
-    https://github.com/fmtlib/fmt/pull/3029,
-    https://github.com/fmtlib/fmt/pull/3043,
-    https://github.com/fmtlib/fmt/issues/3052,
-    https://github.com/fmtlib/fmt/pull/3053,
-    https://github.com/fmtlib/fmt/pull/3054).
-    Thanks @h-friederich, @dimztimz, @olupton, @bernhardmgruber and @phprus.
-
-# 9.0.0 - 2022-07-04
-
--   Switched to the internal floating point formatter for all decimal
-    presentation formats. In particular this results in consistent
-    rounding on all platforms and removing the `s[n]printf` fallback for
-    decimal FP formatting.
-
--   Compile-time floating point formatting no longer requires the
-    header-only mode. For example
-    ([godbolt](https://godbolt.org/z/G37PTeG3b)):
-
-    ```c++
-    #include <array>
-    #include <fmt/compile.h>
-
-    consteval auto compile_time_dtoa(double value) -> std::array<char, 10> {
-      auto result = std::array<char, 10>();
-      fmt::format_to(result.data(), FMT_COMPILE("{}"), value);
-      return result;
-    }
-
-    constexpr auto answer = compile_time_dtoa(0.42);
-    ```
-
-    works with the default settings.
-
--   Improved the implementation of
-    [Dragonbox](https://github.com/jk-jeon/dragonbox), the algorithm
-    used for the default floating-point formatting
-    (https://github.com/fmtlib/fmt/pull/2713,
-    https://github.com/fmtlib/fmt/pull/2750). Thanks @jk-jeon.
-
--   Made `fmt::to_string` work with `__float128`. This uses the internal
-    FP formatter and works even on system without `__float128` support
-    in `[s]printf`.
-
--   Disabled automatic `std::ostream` insertion operator (`operator<<`)
-    discovery when `fmt/ostream.h` is included to prevent ODR
-    violations. You can get the old behavior by defining
-    `FMT_DEPRECATED_OSTREAM` but this will be removed in the next major
-    release. Use `fmt::streamed` or `fmt::ostream_formatter` to enable
-    formatting via `std::ostream` instead.
-
--   Added `fmt::ostream_formatter` that can be used to write `formatter`
-    specializations that perform formatting via `std::ostream`. For
-    example ([godbolt](https://godbolt.org/z/5sEc5qMsf)):
-
-    ```c++
-    #include <fmt/ostream.h>
-
-    struct date {
-      int year, month, day;
-
-      friend std::ostream& operator<<(std::ostream& os, const date& d) {
-        return os << d.year << '-' << d.month << '-' << d.day;
-      }
-    };
-
-    template <> struct fmt::formatter<date> : ostream_formatter {};
-
-    std::string s = fmt::format("The date is {}", date{2012, 12, 9});
-    // s == "The date is 2012-12-9"
-    ```
-
--   Added the `fmt::streamed` function that takes an object and formats
-    it via `std::ostream`. For example
-    ([godbolt](https://godbolt.org/z/5G3346G1f)):
-
-    ```c++
-    #include <thread>
-    #include <fmt/ostream.h>
-
-    int main() {
-      fmt::print("Current thread id: {}\n",
-                 fmt::streamed(std::this_thread::get_id()));
-    }
-    ```
-
-    Note that `fmt/std.h` provides a `formatter` specialization for
-    `std::thread::id` so you don\'t need to format it via
-    `std::ostream`.
-
--   Deprecated implicit conversions of unscoped enums to integers for
-    consistency with scoped enums.
-
--   Added an argument-dependent lookup based `format_as` extension API
-    to simplify formatting of enums.
-
--   Added experimental `std::variant` formatting support
-    (https://github.com/fmtlib/fmt/pull/2941). For example
-    ([godbolt](https://godbolt.org/z/KG9z6cq68)):
-
-    ```c++
-    #include <variant>
-    #include <fmt/std.h>
-
-    int main() {
-      auto v = std::variant<int, std::string>(42);
-      fmt::print("{}\n", v);
-    }
-    ```
-
-    prints:
-
-        variant(42)
-
-    Thanks @jehelset.
-
--   Added experimental `std::filesystem::path` formatting support
-    (https://github.com/fmtlib/fmt/issues/2865,
-    https://github.com/fmtlib/fmt/pull/2902,
-    https://github.com/fmtlib/fmt/issues/2917,
-    https://github.com/fmtlib/fmt/pull/2918). For example
-    ([godbolt](https://godbolt.org/z/o44dMexEb)):
-
-    ```c++
-    #include <filesystem>
-    #include <fmt/std.h>
-
-    int main() {
-      fmt::print("There is no place like {}.", std::filesystem::path("/home"));
-    }
-    ```
-
-    prints:
-
-        There is no place like "/home".
-
-    Thanks @phprus.
-
--   Added a `std::thread::id` formatter to `fmt/std.h`. For example
-    ([godbolt](https://godbolt.org/z/j1azbYf3E)):
-
-    ```c++
-    #include <thread>
-    #include <fmt/std.h>
-
-    int main() {
-      fmt::print("Current thread id: {}\n", std::this_thread::get_id());
-    }
-    ```
-
--   Added `fmt::styled` that applies a text style to an individual
-    argument (https://github.com/fmtlib/fmt/pull/2793). For
-    example ([godbolt](https://godbolt.org/z/vWGW7v5M6)):
-
-    ```c++
-    #include <fmt/chrono.h>
-    #include <fmt/color.h>
-
-    int main() {
-      auto now = std::chrono::system_clock::now();
-      fmt::print(
-        "[{}] {}: {}\n",
-        fmt::styled(now, fmt::emphasis::bold),
-        fmt::styled("error", fg(fmt::color::red)),
-        "something went wrong");
-    }
-    ```
-
-    prints
-
-    ![](https://user-images.githubusercontent.com/576385/175071215-12809244-dab0-4005-96d8-7cd911c964d5.png)
-
-    Thanks @rbrugo.
-
--   Made `fmt::print` overload for text styles correctly handle UTF-8
-    (https://github.com/fmtlib/fmt/issues/2681,
-    https://github.com/fmtlib/fmt/pull/2701). Thanks @AlexGuteniev.
-
--   Fixed Unicode handling when writing to an ostream.
-
--   Added support for nested specifiers to range formatting
-    (https://github.com/fmtlib/fmt/pull/2673). For example
-    ([godbolt](https://godbolt.org/z/xd3Gj38cf)):
-
-    ```c++
-    #include <vector>
-    #include <fmt/ranges.h>
-
-    int main() {
-      fmt::print("{::#x}\n", std::vector{10, 20, 30});
-    }
-    ```
-
-    prints `[0xa, 0x14, 0x1e]`.
-
-    Thanks @BRevzin.
-
--   Implemented escaping of wide strings in ranges
-    (https://github.com/fmtlib/fmt/pull/2904). Thanks @phprus.
-
--   Added support for ranges with `begin` / `end` found via the
-    argument-dependent lookup
-    (https://github.com/fmtlib/fmt/pull/2807). Thanks @rbrugo.
-
--   Fixed formatting of certain kinds of ranges of ranges
-    (https://github.com/fmtlib/fmt/pull/2787). Thanks @BRevzin.
-
--   Fixed handling of maps with element types other than `std::pair`
-    (https://github.com/fmtlib/fmt/pull/2944). Thanks @BrukerJWD.
-
--   Made tuple formatter enabled only if elements are formattable
-    (https://github.com/fmtlib/fmt/issues/2939,
-    https://github.com/fmtlib/fmt/pull/2940). Thanks @jehelset.
-
--   Made `fmt::join` compatible with format string compilation
-    (https://github.com/fmtlib/fmt/issues/2719,
-    https://github.com/fmtlib/fmt/pull/2720). Thanks @phprus.
-
--   Made compile-time checks work with named arguments of custom types
-    and `std::ostream` `print` overloads
-    (https://github.com/fmtlib/fmt/issues/2816,
-    https://github.com/fmtlib/fmt/issues/2817,
-    https://github.com/fmtlib/fmt/pull/2819). Thanks @timsong-cpp.
-
--   Removed `make_args_checked` because it is no longer needed for
-    compile-time checks
-    (https://github.com/fmtlib/fmt/pull/2760). Thanks @phprus.
-
--   Removed the following deprecated APIs: `_format`, `arg_join`, the
-    `format_to` overload that takes a memory buffer, `[v]fprintf` that
-    takes an `ostream`.
-
--   Removed the deprecated implicit conversion of `[const] signed char*`
-    and `[const] unsigned char*` to C strings.
-
--   Removed the deprecated `fmt/locale.h`.
-
--   Replaced the deprecated `fileno()` with `descriptor()` in
-    `buffered_file`.
-
--   Moved `to_string_view` to the `detail` namespace since it\'s an
-    implementation detail.
-
--   Made access mode of a created file consistent with `fopen` by
-    setting `S_IWGRP` and `S_IWOTH`
-    (https://github.com/fmtlib/fmt/pull/2733). Thanks @arogge.
-
--   Removed a redundant buffer resize when formatting to `std::ostream`
-    (https://github.com/fmtlib/fmt/issues/2842,
-    https://github.com/fmtlib/fmt/pull/2843). Thanks @jcelerier.
-
--   Made precision computation for strings consistent with width
-    (https://github.com/fmtlib/fmt/issues/2888).
-
--   Fixed handling of locale separators in floating point formatting
-    (https://github.com/fmtlib/fmt/issues/2830).
-
--   Made sign specifiers work with `__int128_t`
-    (https://github.com/fmtlib/fmt/issues/2773).
-
--   Improved support for systems such as CHERI with extra data stored in
-    pointers (https://github.com/fmtlib/fmt/pull/2932).
-    Thanks @davidchisnall.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/pull/2706,
-    https://github.com/fmtlib/fmt/pull/2712,
-    https://github.com/fmtlib/fmt/pull/2789,
-    https://github.com/fmtlib/fmt/pull/2803,
-    https://github.com/fmtlib/fmt/pull/2805,
-    https://github.com/fmtlib/fmt/pull/2815,
-    https://github.com/fmtlib/fmt/pull/2924).
-    Thanks @BRevzin, @Pokechu22, @setoye, @rtobar, @rbrugo, @anoonD and
-    @leha-bot.
-
--   Improved build configuration
-    (https://github.com/fmtlib/fmt/pull/2766,
-    https://github.com/fmtlib/fmt/pull/2772,
-    https://github.com/fmtlib/fmt/pull/2836,
-    https://github.com/fmtlib/fmt/pull/2852,
-    https://github.com/fmtlib/fmt/pull/2907,
-    https://github.com/fmtlib/fmt/pull/2913,
-    https://github.com/fmtlib/fmt/pull/2914).
-    Thanks @kambala-decapitator, @mattiasljungstrom, @kieselnb, @nathannaveen
-    and @Vertexwahn.
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/issues/2408,
-    https://github.com/fmtlib/fmt/issues/2507,
-    https://github.com/fmtlib/fmt/issues/2697,
-    https://github.com/fmtlib/fmt/issues/2715,
-    https://github.com/fmtlib/fmt/issues/2717,
-    https://github.com/fmtlib/fmt/pull/2722,
-    https://github.com/fmtlib/fmt/pull/2724,
-    https://github.com/fmtlib/fmt/pull/2725,
-    https://github.com/fmtlib/fmt/issues/2726,
-    https://github.com/fmtlib/fmt/pull/2728,
-    https://github.com/fmtlib/fmt/pull/2732,
-    https://github.com/fmtlib/fmt/issues/2738,
-    https://github.com/fmtlib/fmt/pull/2742,
-    https://github.com/fmtlib/fmt/issues/2744,
-    https://github.com/fmtlib/fmt/issues/2745,
-    https://github.com/fmtlib/fmt/issues/2746,
-    https://github.com/fmtlib/fmt/issues/2754,
-    https://github.com/fmtlib/fmt/pull/2755,
-    https://github.com/fmtlib/fmt/issues/2757,
-    https://github.com/fmtlib/fmt/pull/2758,
-    https://github.com/fmtlib/fmt/issues/2761,
-    https://github.com/fmtlib/fmt/pull/2762,
-    https://github.com/fmtlib/fmt/issues/2763,
-    https://github.com/fmtlib/fmt/pull/2765,
-    https://github.com/fmtlib/fmt/issues/2769,
-    https://github.com/fmtlib/fmt/pull/2770,
-    https://github.com/fmtlib/fmt/issues/2771,
-    https://github.com/fmtlib/fmt/issues/2777,
-    https://github.com/fmtlib/fmt/pull/2779,
-    https://github.com/fmtlib/fmt/pull/2782,
-    https://github.com/fmtlib/fmt/pull/2783,
-    https://github.com/fmtlib/fmt/issues/2794,
-    https://github.com/fmtlib/fmt/issues/2796,
-    https://github.com/fmtlib/fmt/pull/2797,
-    https://github.com/fmtlib/fmt/pull/2801,
-    https://github.com/fmtlib/fmt/pull/2802,
-    https://github.com/fmtlib/fmt/issues/2808,
-    https://github.com/fmtlib/fmt/issues/2818,
-    https://github.com/fmtlib/fmt/pull/2819,
-    https://github.com/fmtlib/fmt/issues/2829,
-    https://github.com/fmtlib/fmt/issues/2835,
-    https://github.com/fmtlib/fmt/issues/2848,
-    https://github.com/fmtlib/fmt/issues/2860,
-    https://github.com/fmtlib/fmt/pull/2861,
-    https://github.com/fmtlib/fmt/pull/2882,
-    https://github.com/fmtlib/fmt/issues/2886,
-    https://github.com/fmtlib/fmt/issues/2891,
-    https://github.com/fmtlib/fmt/pull/2892,
-    https://github.com/fmtlib/fmt/issues/2895,
-    https://github.com/fmtlib/fmt/issues/2896,
-    https://github.com/fmtlib/fmt/pull/2903,
-    https://github.com/fmtlib/fmt/issues/2906,
-    https://github.com/fmtlib/fmt/issues/2908,
-    https://github.com/fmtlib/fmt/pull/2909,
-    https://github.com/fmtlib/fmt/issues/2920,
-    https://github.com/fmtlib/fmt/pull/2922,
-    https://github.com/fmtlib/fmt/pull/2927,
-    https://github.com/fmtlib/fmt/pull/2929,
-    https://github.com/fmtlib/fmt/issues/2936,
-    https://github.com/fmtlib/fmt/pull/2937,
-    https://github.com/fmtlib/fmt/pull/2938,
-    https://github.com/fmtlib/fmt/pull/2951,
-    https://github.com/fmtlib/fmt/issues/2954,
-    https://github.com/fmtlib/fmt/pull/2957,
-    https://github.com/fmtlib/fmt/issues/2958,
-    https://github.com/fmtlib/fmt/pull/2960).
-    Thanks @matrackif @Tobi823, @ivan-volnov, @VasiliPupkin256,
-    @federico-busato, @barcharcraz, @jk-jeon, @HazardyKnusperkeks, @dalboris,
-    @seanm, @gsjaardema, @timsong-cpp, @seanm, @frithrah, @chronoxor, @Agga,
-    @madmaxoft, @JurajX, @phprus and @Dani-Hub.
-
-# 8.1.1 - 2022-01-06
-
--   Restored ABI compatibility with version 8.0.x
-    (https://github.com/fmtlib/fmt/issues/2695,
-    https://github.com/fmtlib/fmt/pull/2696). Thanks @saraedum.
--   Fixed chrono formatting on big endian systems
-    (https://github.com/fmtlib/fmt/issues/2698,
-    https://github.com/fmtlib/fmt/pull/2699).
-    Thanks @phprus and @xvitaly.
--   Fixed a linkage error with mingw
-    (https://github.com/fmtlib/fmt/issues/2691,
-    https://github.com/fmtlib/fmt/pull/2692). Thanks @rbberger.
-
-# 8.1.0 - 2022-01-02
-
--   Optimized chrono formatting
-    (https://github.com/fmtlib/fmt/pull/2500,
-    https://github.com/fmtlib/fmt/pull/2537,
-    https://github.com/fmtlib/fmt/issues/2541,
-    https://github.com/fmtlib/fmt/pull/2544,
-    https://github.com/fmtlib/fmt/pull/2550,
-    https://github.com/fmtlib/fmt/pull/2551,
-    https://github.com/fmtlib/fmt/pull/2576,
-    https://github.com/fmtlib/fmt/issues/2577,
-    https://github.com/fmtlib/fmt/pull/2586,
-    https://github.com/fmtlib/fmt/pull/2591,
-    https://github.com/fmtlib/fmt/pull/2594,
-    https://github.com/fmtlib/fmt/pull/2602,
-    https://github.com/fmtlib/fmt/pull/2617,
-    https://github.com/fmtlib/fmt/issues/2628,
-    https://github.com/fmtlib/fmt/pull/2633,
-    https://github.com/fmtlib/fmt/issues/2670,
-    https://github.com/fmtlib/fmt/pull/2671).
-
-    Processing of some specifiers such as `%z` and `%Y` is now up to
-    10-20 times faster, for example on GCC 11 with libstdc++:
-
-        ----------------------------------------------------------------------------
-        Benchmark                                  Before             After
-        ----------------------------------------------------------------------------
-        FMTFormatter_z                             261 ns             26.3 ns
-        FMTFormatterCompile_z                      246 ns             11.6 ns
-        FMTFormatter_Y                             263 ns             26.1 ns
-        FMTFormatterCompile_Y                      244 ns             10.5 ns
-        ----------------------------------------------------------------------------
-
-    Thanks @phprus and @toughengineer.
-
--   Implemented subsecond formatting for chrono durations
-    (https://github.com/fmtlib/fmt/pull/2623). For example
-    ([godbolt](https://godbolt.org/z/es7vWTETe)):
-
-    ```c++
-    #include <fmt/chrono.h>
-
-    int main() {
-      fmt::print("{:%S}", std::chrono::milliseconds(1234));
-    }
-    ```
-
-    prints \"01.234\".
-
-    Thanks @matrackif.
-
--   Fixed handling of precision 0 when formatting chrono durations
-    (https://github.com/fmtlib/fmt/issues/2587,
-    https://github.com/fmtlib/fmt/pull/2588). Thanks @lukester1975.
-
--   Fixed an overflow on invalid inputs in the `tm` formatter
-    (https://github.com/fmtlib/fmt/pull/2564). Thanks @phprus.
-
--   Added `fmt::group_digits` that formats integers with a non-localized
-    digit separator (comma) for groups of three digits. For example
-    ([godbolt](https://godbolt.org/z/TxGxG9Poq)):
-
-    ```c++
-    #include <fmt/format.h>
-
-    int main() {
-      fmt::print("{} dollars", fmt::group_digits(1000000));
-    }
-    ```
-
-    prints \"1,000,000 dollars\".
-
--   Added support for faint, conceal, reverse and blink text styles
-    (https://github.com/fmtlib/fmt/pull/2394):
-
-    <https://user-images.githubusercontent.com/576385/147710227-c68f5317-f8fa-42c3-9123-7c4ba3c398cb.mp4>
-
-    Thanks @benit8 and @data-man.
-
--   Added experimental support for compile-time floating point
-    formatting (https://github.com/fmtlib/fmt/pull/2426,
-    https://github.com/fmtlib/fmt/pull/2470). It is currently
-    limited to the header-only mode. Thanks @alexezeder.
-
--   Added UDL-based named argument support to compile-time format string
-    checks (https://github.com/fmtlib/fmt/issues/2640,
-    https://github.com/fmtlib/fmt/pull/2649). For example
-    ([godbolt](https://godbolt.org/z/ohGbbvonv)):
-
-    ```c++
-    #include <fmt/format.h>
-
-    int main() {
-      using namespace fmt::literals;
-      fmt::print("{answer:s}", "answer"_a=42);
-    }
-    ```
-
-    gives a compile-time error on compilers with C++20 `consteval` and
-    non-type template parameter support (gcc 10+) because `s` is not a
-    valid format specifier for an integer.
-
-    Thanks @alexezeder.
-
--   Implemented escaping of string range elements. For example
-    ([godbolt](https://godbolt.org/z/rKvM1vKf3)):
-
-    ```c++
-    #include <fmt/ranges.h>
-    #include <vector>
-
-    int main() {
-      fmt::print("{}", std::vector<std::string>{"\naan"});
-    }
-    ```
-
-    is now printed as:
-
-        ["\naan"]
-
-    instead of:
-
-        ["
-        aan"]
-
--   Added an experimental `?` specifier for escaping strings.
-    (https://github.com/fmtlib/fmt/pull/2674). Thanks @BRevzin.
-
--   Switched to JSON-like representation of maps and sets for
-    consistency with Python\'s `str.format`. For example
-    ([godbolt](https://godbolt.org/z/seKjoY9W5)):
-
-    ```c++
-    #include <fmt/ranges.h>
-    #include <map>
-
-    int main() {
-      fmt::print("{}", std::map<std::string, int>{{"answer", 42}});
-    }
-    ```
-
-    is now printed as:
-
-        {"answer": 42}
-
--   Extended `fmt::join` to support C++20-only ranges
-    (https://github.com/fmtlib/fmt/pull/2549). Thanks @BRevzin.
-
--   Optimized handling of non-const-iterable ranges and implemented
-    initial support for non-const-formattable types.
-
--   Disabled implicit conversions of scoped enums to integers that was
-    accidentally introduced in earlier versions
-    (https://github.com/fmtlib/fmt/pull/1841).
-
--   Deprecated implicit conversion of `[const] signed char*` and
-    `[const] unsigned char*` to C strings.
-
--   Deprecated `_format`, a legacy UDL-based format API
-    (https://github.com/fmtlib/fmt/pull/2646). Thanks @alexezeder.
-
--   Marked `format`, `formatted_size` and `to_string` as `[[nodiscard]]`
-    (https://github.com/fmtlib/fmt/pull/2612). @0x8000-0000.
-
--   Added missing diagnostic when trying to format function and member
-    pointers as well as objects convertible to pointers which is
-    explicitly disallowed
-    (https://github.com/fmtlib/fmt/issues/2598,
-    https://github.com/fmtlib/fmt/pull/2609,
-    https://github.com/fmtlib/fmt/pull/2610). Thanks @AlexGuteniev.
-
--   Optimized writing to a contiguous buffer with `format_to_n`
-    (https://github.com/fmtlib/fmt/pull/2489). Thanks @Roman-Koshelev.
-
--   Optimized writing to non-`char` buffers
-    (https://github.com/fmtlib/fmt/pull/2477). Thanks @Roman-Koshelev.
-
--   Decimal point is now localized when using the `L` specifier.
-
--   Improved floating point formatter implementation
-    (https://github.com/fmtlib/fmt/pull/2498,
-    https://github.com/fmtlib/fmt/pull/2499). Thanks @Roman-Koshelev.
-
--   Fixed handling of very large precision in fixed format
-    (https://github.com/fmtlib/fmt/pull/2616).
-
--   Made a table of cached powers used in FP formatting static
-    (https://github.com/fmtlib/fmt/pull/2509). Thanks @jk-jeon.
-
--   Resolved a lookup ambiguity with C++20 format-related functions due
-    to ADL (https://github.com/fmtlib/fmt/issues/2639,
-    https://github.com/fmtlib/fmt/pull/2641). Thanks @mkurdej.
-
--   Removed unnecessary inline namespace qualification
-    (https://github.com/fmtlib/fmt/issues/2642,
-    https://github.com/fmtlib/fmt/pull/2643). Thanks @mkurdej.
-
--   Implemented argument forwarding in `format_to_n`
-    (https://github.com/fmtlib/fmt/issues/2462,
-    https://github.com/fmtlib/fmt/pull/2463). Thanks @owent.
-
--   Fixed handling of implicit conversions in `fmt::to_string` and
-    format string compilation
-    (https://github.com/fmtlib/fmt/issues/2565).
-
--   Changed the default access mode of files created by
-    `fmt::output_file` to `-rw-r--r--` for consistency with `fopen`
-    (https://github.com/fmtlib/fmt/issues/2530).
-
--   Make `fmt::ostream::flush` public
-    (https://github.com/fmtlib/fmt/issues/2435).
-
--   Improved C++14/17 attribute detection
-    (https://github.com/fmtlib/fmt/pull/2615). Thanks @AlexGuteniev.
-
--   Improved `consteval` detection for MSVC
-    (https://github.com/fmtlib/fmt/pull/2559). Thanks @DanielaE.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/issues/2406,
-    https://github.com/fmtlib/fmt/pull/2446,
-    https://github.com/fmtlib/fmt/issues/2493,
-    https://github.com/fmtlib/fmt/issues/2513,
-    https://github.com/fmtlib/fmt/pull/2515,
-    https://github.com/fmtlib/fmt/issues/2522,
-    https://github.com/fmtlib/fmt/pull/2562,
-    https://github.com/fmtlib/fmt/pull/2575,
-    https://github.com/fmtlib/fmt/pull/2606,
-    https://github.com/fmtlib/fmt/pull/2620,
-    https://github.com/fmtlib/fmt/issues/2676).
-    Thanks @sobolevn, @UnePierre, @zhsj, @phprus, @ericcurtin and @Lounarok.
-
--   Improved fuzzers and added a fuzzer for chrono timepoint formatting
-    (https://github.com/fmtlib/fmt/pull/2461,
-    https://github.com/fmtlib/fmt/pull/2469). @pauldreik,
-
--   Added the `FMT_SYSTEM_HEADERS` CMake option setting which marks
-    {fmt}\'s headers as system. It can be used to suppress warnings
-    (https://github.com/fmtlib/fmt/issues/2644,
-    https://github.com/fmtlib/fmt/pull/2651). Thanks @alexezeder.
-
--   Added the Bazel build system support
-    (https://github.com/fmtlib/fmt/pull/2505,
-    https://github.com/fmtlib/fmt/pull/2516). Thanks @Vertexwahn.
-
--   Improved build configuration and tests
-    (https://github.com/fmtlib/fmt/issues/2437,
-    https://github.com/fmtlib/fmt/pull/2558,
-    https://github.com/fmtlib/fmt/pull/2648,
-    https://github.com/fmtlib/fmt/pull/2650,
-    https://github.com/fmtlib/fmt/pull/2663,
-    https://github.com/fmtlib/fmt/pull/2677).
-    Thanks @DanielaE, @alexezeder and @phprus.
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/pull/2353,
-    https://github.com/fmtlib/fmt/pull/2356,
-    https://github.com/fmtlib/fmt/pull/2399,
-    https://github.com/fmtlib/fmt/issues/2408,
-    https://github.com/fmtlib/fmt/pull/2414,
-    https://github.com/fmtlib/fmt/pull/2427,
-    https://github.com/fmtlib/fmt/pull/2432,
-    https://github.com/fmtlib/fmt/pull/2442,
-    https://github.com/fmtlib/fmt/pull/2434,
-    https://github.com/fmtlib/fmt/issues/2439,
-    https://github.com/fmtlib/fmt/pull/2447,
-    https://github.com/fmtlib/fmt/pull/2450,
-    https://github.com/fmtlib/fmt/issues/2455,
-    https://github.com/fmtlib/fmt/issues/2465,
-    https://github.com/fmtlib/fmt/issues/2472,
-    https://github.com/fmtlib/fmt/issues/2474,
-    https://github.com/fmtlib/fmt/pull/2476,
-    https://github.com/fmtlib/fmt/issues/2478,
-    https://github.com/fmtlib/fmt/issues/2479,
-    https://github.com/fmtlib/fmt/issues/2481,
-    https://github.com/fmtlib/fmt/pull/2482,
-    https://github.com/fmtlib/fmt/pull/2483,
-    https://github.com/fmtlib/fmt/issues/2490,
-    https://github.com/fmtlib/fmt/pull/2491,
-    https://github.com/fmtlib/fmt/pull/2510,
-    https://github.com/fmtlib/fmt/pull/2518,
-    https://github.com/fmtlib/fmt/issues/2528,
-    https://github.com/fmtlib/fmt/pull/2529,
-    https://github.com/fmtlib/fmt/pull/2539,
-    https://github.com/fmtlib/fmt/issues/2540,
-    https://github.com/fmtlib/fmt/pull/2545,
-    https://github.com/fmtlib/fmt/pull/2555,
-    https://github.com/fmtlib/fmt/issues/2557,
-    https://github.com/fmtlib/fmt/issues/2570,
-    https://github.com/fmtlib/fmt/pull/2573,
-    https://github.com/fmtlib/fmt/pull/2582,
-    https://github.com/fmtlib/fmt/issues/2605,
-    https://github.com/fmtlib/fmt/pull/2611,
-    https://github.com/fmtlib/fmt/pull/2647,
-    https://github.com/fmtlib/fmt/issues/2627,
-    https://github.com/fmtlib/fmt/pull/2630,
-    https://github.com/fmtlib/fmt/issues/2635,
-    https://github.com/fmtlib/fmt/issues/2638,
-    https://github.com/fmtlib/fmt/issues/2653,
-    https://github.com/fmtlib/fmt/issues/2654,
-    https://github.com/fmtlib/fmt/issues/2661,
-    https://github.com/fmtlib/fmt/pull/2664,
-    https://github.com/fmtlib/fmt/pull/2684).
-    Thanks @DanielaE, @mwinterb, @cdacamar, @TrebledJ, @bodomartin, @cquammen,
-    @white238, @mmarkeloff, @palacaze, @jcelerier, @mborn-adi, @BrukerJWD,
-    @spyridon97, @phprus, @oliverlee, @joshessman-llnl, @akohlmey, @timkalu,
-    @olupton, @Acretock, @alexezeder, @andrewcorrigan, @lucpelletier and
-    @HazardyKnusperkeks.
-
-# 8.0.1 - 2021-07-02
-
--   Fixed the version number in the inline namespace
-    (https://github.com/fmtlib/fmt/issues/2374).
--   Added a missing presentation type check for `std::string`
-    (https://github.com/fmtlib/fmt/issues/2402).
--   Fixed a linkage error when mixing code built with clang and gcc
-    (https://github.com/fmtlib/fmt/issues/2377).
--   Fixed documentation issues
-    (https://github.com/fmtlib/fmt/pull/2396,
-    https://github.com/fmtlib/fmt/issues/2403,
-    https://github.com/fmtlib/fmt/issues/2406). Thanks @mkurdej.
--   Removed dead code in FP formatter (
-    https://github.com/fmtlib/fmt/pull/2398). Thanks @javierhonduco.
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/issues/2351,
-    https://github.com/fmtlib/fmt/issues/2359,
-    https://github.com/fmtlib/fmt/pull/2365,
-    https://github.com/fmtlib/fmt/issues/2368,
-    https://github.com/fmtlib/fmt/pull/2370,
-    https://github.com/fmtlib/fmt/pull/2376,
-    https://github.com/fmtlib/fmt/pull/2381,
-    https://github.com/fmtlib/fmt/pull/2382,
-    https://github.com/fmtlib/fmt/issues/2386,
-    https://github.com/fmtlib/fmt/pull/2389,
-    https://github.com/fmtlib/fmt/pull/2395,
-    https://github.com/fmtlib/fmt/pull/2397,
-    https://github.com/fmtlib/fmt/issues/2400,
-    https://github.com/fmtlib/fmt/issues/2401,
-    https://github.com/fmtlib/fmt/pull/2407).
-    Thanks @zx2c4, @AidanSun05, @mattiasljungstrom, @joemmett, @erengy,
-    @patlkli, @gsjaardema and @phprus.
-
-# 8.0.0 - 2021-06-21
-
--   Enabled compile-time format string checks by default. For example
-    ([godbolt](https://godbolt.org/z/sMxcohGjz)):
-
-    ```c++
-    #include <fmt/core.h>
-
-    int main() {
-      fmt::print("{:d}", "I am not a number");
-    }
-    ```
-
-    gives a compile-time error on compilers with C++20 `consteval`
-    support (gcc 10+, clang 11+) because `d` is not a valid format
-    specifier for a string.
-
-    To pass a runtime string wrap it in `fmt::runtime`:
-
-    ```c++
-    fmt::print(fmt::runtime("{:d}"), "I am not a number");
-    ```
-
--   Added compile-time formatting
-    (https://github.com/fmtlib/fmt/pull/2019,
-    https://github.com/fmtlib/fmt/pull/2044,
-    https://github.com/fmtlib/fmt/pull/2056,
-    https://github.com/fmtlib/fmt/pull/2072,
-    https://github.com/fmtlib/fmt/pull/2075,
-    https://github.com/fmtlib/fmt/issues/2078,
-    https://github.com/fmtlib/fmt/pull/2129,
-    https://github.com/fmtlib/fmt/pull/2326). For example
-    ([godbolt](https://godbolt.org/z/Mxx9d89jM)):
-
-    ```c++
-    #include <fmt/compile.h>
-
-    consteval auto compile_time_itoa(int value) -> std::array<char, 10> {
-      auto result = std::array<char, 10>();
-      fmt::format_to(result.data(), FMT_COMPILE("{}"), value);
-      return result;
-    }
-
-    constexpr auto answer = compile_time_itoa(42);
-    ```
-
-    Most of the formatting functionality is available at compile time
-    with a notable exception of floating-point numbers and pointers.
-    Thanks @alexezeder.
-
--   Optimized handling of format specifiers during format string
-    compilation. For example, hexadecimal formatting (`"{:x}"`) is now
-    3-7x faster than before when using `format_to` with format string
-    compilation and a stack-allocated buffer
-    (https://github.com/fmtlib/fmt/issues/1944).
-
-    Before (7.1.3):
-
-        ----------------------------------------------------------------------------
-        Benchmark                                  Time             CPU   Iterations
-        ----------------------------------------------------------------------------
-        FMTCompileOld/0                         15.5 ns         15.5 ns     43302898
-        FMTCompileOld/42                        16.6 ns         16.6 ns     43278267
-        FMTCompileOld/273123                    18.7 ns         18.6 ns     37035861
-        FMTCompileOld/9223372036854775807       19.4 ns         19.4 ns     35243000
-        ----------------------------------------------------------------------------
-
-    After (8.x):
-
-        ----------------------------------------------------------------------------
-        Benchmark                                  Time             CPU   Iterations
-        ----------------------------------------------------------------------------
-        FMTCompileNew/0                         1.99 ns         1.99 ns    360523686
-        FMTCompileNew/42                        2.33 ns         2.33 ns    279865664
-        FMTCompileNew/273123                    3.72 ns         3.71 ns    190230315
-        FMTCompileNew/9223372036854775807       5.28 ns         5.26 ns    130711631
-        ----------------------------------------------------------------------------
-
-    It is even faster than `std::to_chars` from libc++ compiled with
-    clang on macOS:
-
-        ----------------------------------------------------------------------------
-        Benchmark                                  Time             CPU   Iterations
-        ----------------------------------------------------------------------------
-        ToChars/0                               4.42 ns         4.41 ns    160196630
-        ToChars/42                              5.00 ns         4.98 ns    140735201
-        ToChars/273123                          7.26 ns         7.24 ns     95784130
-        ToChars/9223372036854775807             8.77 ns         8.75 ns     75872534
-        ----------------------------------------------------------------------------
-
-    In other cases, especially involving `std::string` construction, the
-    speed up is usually lower because handling format specifiers takes a
-    smaller fraction of the total time.
-
--   Added the `_cf` user-defined literal to represent a compiled format
-    string. It can be used instead of the `FMT_COMPILE` macro
-    (https://github.com/fmtlib/fmt/pull/2043,
-    https://github.com/fmtlib/fmt/pull/2242):
-
-    ```c++
-    #include <fmt/compile.h>
-
-    using namespace fmt::literals;
-    auto s = fmt::format(FMT_COMPILE("{}"), 42); // 🙁 not modern
-    auto s = fmt::format("{}"_cf, 42);           // 🙂 modern as hell
-    ```
-
-    It requires compiler support for class types in non-type template
-    parameters (a C++20 feature) which is available in GCC 9.3+.
-    Thanks @alexezeder.
-
--   Format string compilation now requires `format` functions of
-    `formatter` specializations for user-defined types to be `const`:
-
-    ```c++
-    template <> struct fmt::formatter<my_type>: formatter<string_view> {
-      template <typename FormatContext>
-      auto format(my_type obj, FormatContext& ctx) const {  // Note const here.
-        // ...
-      }
-    };
-    ```
-
--   Added UDL-based named argument support to format string compilation
-    (https://github.com/fmtlib/fmt/pull/2243,
-    https://github.com/fmtlib/fmt/pull/2281). For example:
-
-    ```c++
-    #include <fmt/compile.h>
-
-    using namespace fmt::literals;
-    auto s = fmt::format(FMT_COMPILE("{answer}"), "answer"_a = 42);
-    ```
-
-    Here the argument named \"answer\" is resolved at compile time with
-    no runtime overhead. Thanks @alexezeder.
-
--   Added format string compilation support to `fmt::print`
-    (https://github.com/fmtlib/fmt/issues/2280,
-    https://github.com/fmtlib/fmt/pull/2304). Thanks @alexezeder.
-
--   Added initial support for compiling {fmt} as a C++20 module
-    (https://github.com/fmtlib/fmt/pull/2235,
-    https://github.com/fmtlib/fmt/pull/2240,
-    https://github.com/fmtlib/fmt/pull/2260,
-    https://github.com/fmtlib/fmt/pull/2282,
-    https://github.com/fmtlib/fmt/pull/2283,
-    https://github.com/fmtlib/fmt/pull/2288,
-    https://github.com/fmtlib/fmt/pull/2298,
-    https://github.com/fmtlib/fmt/pull/2306,
-    https://github.com/fmtlib/fmt/pull/2307,
-    https://github.com/fmtlib/fmt/pull/2309,
-    https://github.com/fmtlib/fmt/pull/2318,
-    https://github.com/fmtlib/fmt/pull/2324,
-    https://github.com/fmtlib/fmt/pull/2332,
-    https://github.com/fmtlib/fmt/pull/2340). Thanks @DanielaE.
-
--   Made symbols private by default reducing shared library size
-    (https://github.com/fmtlib/fmt/pull/2301). For example
-    there was a \~15% reported reduction on one platform. Thanks @sergiud.
-
--   Optimized includes making the result of preprocessing `fmt/format.h`
-    \~20% smaller with libstdc++/C++20 and slightly improving build
-    times (https://github.com/fmtlib/fmt/issues/1998).
-
--   Added support of ranges with non-const `begin` / `end`
-    (https://github.com/fmtlib/fmt/pull/1953). Thanks @kitegi.
-
--   Added support of `std::byte` and other formattable types to
-    `fmt::join` (https://github.com/fmtlib/fmt/issues/1981,
-    https://github.com/fmtlib/fmt/issues/2040,
-    https://github.com/fmtlib/fmt/pull/2050,
-    https://github.com/fmtlib/fmt/issues/2262). For example:
-
-    ```c++
-    #include <fmt/format.h>
-    #include <cstddef>
-    #include <vector>
-
-    int main() {
-      auto bytes = std::vector{std::byte(4), std::byte(2)};
-      fmt::print("{}", fmt::join(bytes, ""));
-    }
-    ```
-
-    prints \"42\".
-
-    Thanks @kamibo.
-
--   Implemented the default format for `std::chrono::system_clock`
-    (https://github.com/fmtlib/fmt/issues/2319,
-    https://github.com/fmtlib/fmt/pull/2345). For example:
-
-    ```c++
-    #include <fmt/chrono.h>
-
-    int main() {
-      fmt::print("{}", std::chrono::system_clock::now());
-    }
-    ```
-
-    prints \"2021-06-18 15:22:00\" (the output depends on the current
-    date and time). Thanks @sunmy2019.
-
--   Made more chrono specifiers locale independent by default. Use the
-    `'L'` specifier to get localized formatting. For example:
-
-    ```c++
-    #include <fmt/chrono.h>
-
-    int main() {
-      std::locale::global(std::locale("ru_RU.UTF-8"));
-      auto monday = std::chrono::weekday(1);
-      fmt::print("{}\n", monday);   // prints "Mon"
-      fmt::print("{:L}\n", monday); // prints "пн"
-    }
-    ```
-
--   Improved locale handling in chrono formatting
-    (https://github.com/fmtlib/fmt/issues/2337,
-    https://github.com/fmtlib/fmt/pull/2349,
-    https://github.com/fmtlib/fmt/pull/2350). Thanks @phprus.
-
--   Deprecated `fmt/locale.h` moving the formatting functions that take
-    a locale to `fmt/format.h` (`char`) and `fmt/xchar` (other
-    overloads). This doesn\'t introduce a dependency on `<locale>` so
-    there is virtually no compile time effect.
-
--   Deprecated an undocumented `format_to` overload that takes
-    `basic_memory_buffer`.
-
--   Made parameter order in `vformat_to` consistent with `format_to`
-    (https://github.com/fmtlib/fmt/issues/2327).
-
--   Added support for time points with arbitrary durations
-    (https://github.com/fmtlib/fmt/issues/2208). For example:
-
-    ```c++
-    #include <fmt/chrono.h>
-
-    int main() {
-      using tp = std::chrono::time_point<
-        std::chrono::system_clock, std::chrono::seconds>;
-      fmt::print("{:%S}", tp(std::chrono::seconds(42)));
-    }
-    ```
-
-    prints \"42\".
-
--   Formatting floating-point numbers no longer produces trailing zeros
-    by default for consistency with `std::format`. For example:
-
-    ```c++
-    #include <fmt/core.h>
-
-    int main() {
-      fmt::print("{0:.3}", 1.1);
-    }
-    ```
-
-    prints \"1.1\". Use the `'#'` specifier to keep trailing zeros.
-
--   Dropped a limit on the number of elements in a range and replaced
-    `{}` with `[]` as range delimiters for consistency with Python\'s
-    `str.format`.
-
--   The `'L'` specifier for locale-specific numeric formatting can now
-    be combined with presentation specifiers as in `std::format`. For
-    example:
-
-    ```c++
-    #include <fmt/core.h>
-    #include <locale>
-
-    int main() {
-      std::locale::global(std::locale("fr_FR.UTF-8"));
-      fmt::print("{0:.2Lf}", 0.42);
-    }
-    ```
-
-    prints \"0,42\". The deprecated `'n'` specifier has been removed.
-
--   Made the `0` specifier ignored for infinity and NaN
-    (https://github.com/fmtlib/fmt/issues/2305,
-    https://github.com/fmtlib/fmt/pull/2310). Thanks @Liedtke.
-
--   Made the hexfloat formatting use the right alignment by default
-    (https://github.com/fmtlib/fmt/issues/2308,
-    https://github.com/fmtlib/fmt/pull/2317). Thanks @Liedtke.
-
--   Removed the deprecated numeric alignment (`'='`). Use the `'0'`
-    specifier instead.
-
--   Removed the deprecated `fmt/posix.h` header that has been replaced
-    with `fmt/os.h`.
-
--   Removed the deprecated `format_to_n_context`, `format_to_n_args` and
-    `make_format_to_n_args`. They have been replaced with
-    `format_context`, `` format_args` and ``make_format_args\`\`
-    respectively.
-
--   Moved `wchar_t`-specific functions and types to `fmt/xchar.h`. You
-    can define `FMT_DEPRECATED_INCLUDE_XCHAR` to automatically include
-    `fmt/xchar.h` from `fmt/format.h` but this will be disabled in the
-    next major release.
-
--   Fixed handling of the `'+'` specifier in localized formatting
-    (https://github.com/fmtlib/fmt/issues/2133).
-
--   Added support for the `'s'` format specifier that gives textual
-    representation of `bool`
-    (https://github.com/fmtlib/fmt/issues/2094,
-    https://github.com/fmtlib/fmt/pull/2109). For example:
-
-    ```c++
-    #include <fmt/core.h>
-
-    int main() {
-      fmt::print("{:s}", true);
-    }
-    ```
-
-    prints \"true\". Thanks @powercoderlol.
-
--   Made `fmt::ptr` work with function pointers
-    (https://github.com/fmtlib/fmt/pull/2131). For example:
-
-    ```c++
-    #include <fmt/format.h>
-
-    int main() {
-      fmt::print("My main: {}\n", fmt::ptr(main));
-    }
-    ```
-
-    Thanks @mikecrowe.
-
--   The undocumented support for specializing `formatter` for pointer
-    types has been removed.
-
--   Fixed `fmt::formatted_size` with format string compilation
-    (https://github.com/fmtlib/fmt/pull/2141,
-    https://github.com/fmtlib/fmt/pull/2161). Thanks @alexezeder.
-
--   Fixed handling of empty format strings during format string
-    compilation (https://github.com/fmtlib/fmt/issues/2042):
-
-    ```c++
-    auto s = fmt::format(FMT_COMPILE(""));
-    ```
-
-    Thanks @alexezeder.
-
--   Fixed handling of enums in `fmt::to_string`
-    (https://github.com/fmtlib/fmt/issues/2036).
-
--   Improved width computation
-    (https://github.com/fmtlib/fmt/issues/2033,
-    https://github.com/fmtlib/fmt/issues/2091). For example:
-
-    ```c++
-    #include <fmt/core.h>
-
-    int main() {
-      fmt::print("{:-<10}{}\n", "你好", "世界");
-      fmt::print("{:-<10}{}\n", "hello", "world");
-    }
-    ```
-
-    prints
-
-    ![](https://user-images.githubusercontent.com/576385/119840373-cea3ca80-beb9-11eb-91e0-54266c48e181.png)
-
-    on a modern terminal.
-
--   The experimental fast output stream (`fmt::ostream`) is now
-    truncated by default for consistency with `fopen`
-    (https://github.com/fmtlib/fmt/issues/2018). For example:
-
-    ```c++
-    #include <fmt/os.h>
-
-    int main() {
-      fmt::ostream out1 = fmt::output_file("guide");
-      out1.print("Zaphod");
-      out1.close();
-      fmt::ostream out2 = fmt::output_file("guide");
-      out2.print("Ford");
-    }
-    ```
-
-    writes \"Ford\" to the file \"guide\". To preserve the old file
-    content if any pass `fmt::file::WRONLY | fmt::file::CREATE` flags to
-    `fmt::output_file`.
-
--   Fixed moving of `fmt::ostream` that holds buffered data
-    (https://github.com/fmtlib/fmt/issues/2197,
-    https://github.com/fmtlib/fmt/pull/2198). Thanks @vtta.
-
--   Replaced the `fmt::system_error` exception with a function of the
-    same name that constructs `std::system_error`
-    (https://github.com/fmtlib/fmt/issues/2266).
-
--   Replaced the `fmt::windows_error` exception with a function of the
-    same name that constructs `std::system_error` with the category
-    returned by `fmt::system_category()`
-    (https://github.com/fmtlib/fmt/issues/2274,
-    https://github.com/fmtlib/fmt/pull/2275). The latter is
-    similar to `std::sytem_category` but correctly handles UTF-8.
-    Thanks @phprus.
-
--   Replaced `fmt::error_code` with `std::error_code` and made it
-    formattable (https://github.com/fmtlib/fmt/issues/2269,
-    https://github.com/fmtlib/fmt/pull/2270,
-    https://github.com/fmtlib/fmt/pull/2273). Thanks @phprus.
-
--   Added speech synthesis support
-    (https://github.com/fmtlib/fmt/pull/2206).
-
--   Made `format_to` work with a memory buffer that has a custom
-    allocator (https://github.com/fmtlib/fmt/pull/2300).
-    Thanks @voxmea.
-
--   Added `Allocator::max_size` support to `basic_memory_buffer`.
-    (https://github.com/fmtlib/fmt/pull/1960). Thanks @phprus.
-
--   Added wide string support to `fmt::join`
-    (https://github.com/fmtlib/fmt/pull/2236). Thanks @crbrz.
-
--   Made iterators passed to `formatter` specializations via a format
-    context satisfy C++20 `std::output_iterator` requirements
-    (https://github.com/fmtlib/fmt/issues/2156,
-    https://github.com/fmtlib/fmt/pull/2158,
-    https://github.com/fmtlib/fmt/issues/2195,
-    https://github.com/fmtlib/fmt/pull/2204). Thanks @randomnetcat.
-
--   Optimized the `printf` implementation
-    (https://github.com/fmtlib/fmt/pull/1982,
-    https://github.com/fmtlib/fmt/pull/1984,
-    https://github.com/fmtlib/fmt/pull/2016,
-    https://github.com/fmtlib/fmt/pull/2164).
-    Thanks @rimathia and @moiwi.
-
--   Improved detection of `constexpr` `char_traits`
-    (https://github.com/fmtlib/fmt/pull/2246,
-    https://github.com/fmtlib/fmt/pull/2257). Thanks @phprus.
-
--   Fixed writing to `stdout` when it is redirected to `NUL` on Windows
-    (https://github.com/fmtlib/fmt/issues/2080).
-
--   Fixed exception propagation from iterators
-    (https://github.com/fmtlib/fmt/issues/2097).
-
--   Improved `strftime` error handling
-    (https://github.com/fmtlib/fmt/issues/2238,
-    https://github.com/fmtlib/fmt/pull/2244). Thanks @yumeyao.
-
--   Stopped using deprecated GCC UDL template extension.
-
--   Added `fmt/args.h` to the install target
-    (https://github.com/fmtlib/fmt/issues/2096).
-
--   Error messages are now passed to assert when exceptions are disabled
-    (https://github.com/fmtlib/fmt/pull/2145). Thanks @NobodyXu.
-
--   Added the `FMT_MASTER_PROJECT` CMake option to control build and
-    install targets when {fmt} is included via `add_subdirectory`
-    (https://github.com/fmtlib/fmt/issues/2098,
-    https://github.com/fmtlib/fmt/pull/2100).
-    Thanks @randomizedthinking.
-
--   Improved build configuration
-    (https://github.com/fmtlib/fmt/pull/2026,
-    https://github.com/fmtlib/fmt/pull/2122).
-    Thanks @luncliff and @ibaned.
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/issues/1947,
-    https://github.com/fmtlib/fmt/pull/1959,
-    https://github.com/fmtlib/fmt/pull/1963,
-    https://github.com/fmtlib/fmt/pull/1965,
-    https://github.com/fmtlib/fmt/issues/1966,
-    https://github.com/fmtlib/fmt/pull/1974,
-    https://github.com/fmtlib/fmt/pull/1975,
-    https://github.com/fmtlib/fmt/pull/1990,
-    https://github.com/fmtlib/fmt/issues/2000,
-    https://github.com/fmtlib/fmt/pull/2001,
-    https://github.com/fmtlib/fmt/issues/2002,
-    https://github.com/fmtlib/fmt/issues/2004,
-    https://github.com/fmtlib/fmt/pull/2006,
-    https://github.com/fmtlib/fmt/pull/2009,
-    https://github.com/fmtlib/fmt/pull/2010,
-    https://github.com/fmtlib/fmt/issues/2038,
-    https://github.com/fmtlib/fmt/issues/2039,
-    https://github.com/fmtlib/fmt/issues/2047,
-    https://github.com/fmtlib/fmt/pull/2053,
-    https://github.com/fmtlib/fmt/issues/2059,
-    https://github.com/fmtlib/fmt/pull/2065,
-    https://github.com/fmtlib/fmt/pull/2067,
-    https://github.com/fmtlib/fmt/pull/2068,
-    https://github.com/fmtlib/fmt/pull/2073,
-    https://github.com/fmtlib/fmt/issues/2103,
-    https://github.com/fmtlib/fmt/issues/2105,
-    https://github.com/fmtlib/fmt/pull/2106,
-    https://github.com/fmtlib/fmt/pull/2107,
-    https://github.com/fmtlib/fmt/issues/2116,
-    https://github.com/fmtlib/fmt/pull/2117,
-    https://github.com/fmtlib/fmt/issues/2118,
-    https://github.com/fmtlib/fmt/pull/2119,
-    https://github.com/fmtlib/fmt/issues/2127,
-    https://github.com/fmtlib/fmt/pull/2128,
-    https://github.com/fmtlib/fmt/issues/2140,
-    https://github.com/fmtlib/fmt/issues/2142,
-    https://github.com/fmtlib/fmt/pull/2143,
-    https://github.com/fmtlib/fmt/pull/2144,
-    https://github.com/fmtlib/fmt/issues/2147,
-    https://github.com/fmtlib/fmt/issues/2148,
-    https://github.com/fmtlib/fmt/issues/2149,
-    https://github.com/fmtlib/fmt/pull/2152,
-    https://github.com/fmtlib/fmt/pull/2160,
-    https://github.com/fmtlib/fmt/issues/2170,
-    https://github.com/fmtlib/fmt/issues/2175,
-    https://github.com/fmtlib/fmt/issues/2176,
-    https://github.com/fmtlib/fmt/pull/2177,
-    https://github.com/fmtlib/fmt/issues/2178,
-    https://github.com/fmtlib/fmt/pull/2179,
-    https://github.com/fmtlib/fmt/issues/2180,
-    https://github.com/fmtlib/fmt/issues/2181,
-    https://github.com/fmtlib/fmt/pull/2183,
-    https://github.com/fmtlib/fmt/issues/2184,
-    https://github.com/fmtlib/fmt/issues/2185,
-    https://github.com/fmtlib/fmt/pull/2186,
-    https://github.com/fmtlib/fmt/pull/2187,
-    https://github.com/fmtlib/fmt/pull/2190,
-    https://github.com/fmtlib/fmt/pull/2192,
-    https://github.com/fmtlib/fmt/pull/2194,
-    https://github.com/fmtlib/fmt/pull/2205,
-    https://github.com/fmtlib/fmt/issues/2210,
-    https://github.com/fmtlib/fmt/pull/2211,
-    https://github.com/fmtlib/fmt/pull/2215,
-    https://github.com/fmtlib/fmt/pull/2216,
-    https://github.com/fmtlib/fmt/pull/2218,
-    https://github.com/fmtlib/fmt/pull/2220,
-    https://github.com/fmtlib/fmt/issues/2228,
-    https://github.com/fmtlib/fmt/pull/2229,
-    https://github.com/fmtlib/fmt/pull/2230,
-    https://github.com/fmtlib/fmt/issues/2233,
-    https://github.com/fmtlib/fmt/pull/2239,
-    https://github.com/fmtlib/fmt/issues/2248,
-    https://github.com/fmtlib/fmt/issues/2252,
-    https://github.com/fmtlib/fmt/pull/2253,
-    https://github.com/fmtlib/fmt/pull/2255,
-    https://github.com/fmtlib/fmt/issues/2261,
-    https://github.com/fmtlib/fmt/issues/2278,
-    https://github.com/fmtlib/fmt/issues/2284,
-    https://github.com/fmtlib/fmt/pull/2287,
-    https://github.com/fmtlib/fmt/pull/2289,
-    https://github.com/fmtlib/fmt/pull/2290,
-    https://github.com/fmtlib/fmt/pull/2293,
-    https://github.com/fmtlib/fmt/issues/2295,
-    https://github.com/fmtlib/fmt/pull/2296,
-    https://github.com/fmtlib/fmt/pull/2297,
-    https://github.com/fmtlib/fmt/issues/2311,
-    https://github.com/fmtlib/fmt/pull/2313,
-    https://github.com/fmtlib/fmt/pull/2315,
-    https://github.com/fmtlib/fmt/issues/2320,
-    https://github.com/fmtlib/fmt/pull/2321,
-    https://github.com/fmtlib/fmt/pull/2323,
-    https://github.com/fmtlib/fmt/issues/2328,
-    https://github.com/fmtlib/fmt/pull/2329,
-    https://github.com/fmtlib/fmt/pull/2333,
-    https://github.com/fmtlib/fmt/pull/2338,
-    https://github.com/fmtlib/fmt/pull/2341).
-    Thanks @darklukee, @fagg, @killerbot242, @jgopel, @yeswalrus, @Finkman,
-    @HazardyKnusperkeks, @dkavolis, @concatime, @chronoxor, @summivox, @yNeo,
-    @Apache-HB, @alexezeder, @toojays, @Brainy0207, @vadz, @imsherlock, @phprus,
-    @white238, @yafshar, @BillyDonahue, @jstaahl, @denchat, @DanielaE,
-    @ilyakurdyukov, @ilmai, @JessyDL, @sergiud, @mwinterb, @sven-herrmann,
-    @jmelas, @twoixter, @crbrz and @upsj.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/issues/1986,
-    https://github.com/fmtlib/fmt/pull/2051,
-    https://github.com/fmtlib/fmt/issues/2057,
-    https://github.com/fmtlib/fmt/pull/2081,
-    https://github.com/fmtlib/fmt/issues/2084,
-    https://github.com/fmtlib/fmt/pull/2312).
-    Thanks @imba-tjd, @0x416c69 and @mordante.
-
--   Continuous integration and test improvements
-    (https://github.com/fmtlib/fmt/issues/1969,
-    https://github.com/fmtlib/fmt/pull/1991,
-    https://github.com/fmtlib/fmt/pull/2020,
-    https://github.com/fmtlib/fmt/pull/2110,
-    https://github.com/fmtlib/fmt/pull/2114,
-    https://github.com/fmtlib/fmt/issues/2196,
-    https://github.com/fmtlib/fmt/pull/2217,
-    https://github.com/fmtlib/fmt/pull/2247,
-    https://github.com/fmtlib/fmt/pull/2256,
-    https://github.com/fmtlib/fmt/pull/2336,
-    https://github.com/fmtlib/fmt/pull/2346).
-    Thanks @jgopel, @alexezeder and @DanielaE.
-
-# 7.1.3 - 2020-11-24
-
--   Fixed handling of buffer boundaries in `format_to_n`
-    (https://github.com/fmtlib/fmt/issues/1996,
-    https://github.com/fmtlib/fmt/issues/2029).
--   Fixed linkage errors when linking with a shared library
-    (https://github.com/fmtlib/fmt/issues/2011).
--   Reintroduced ostream support to range formatters
-    (https://github.com/fmtlib/fmt/issues/2014).
--   Worked around an issue with mixing std versions in gcc
-    (https://github.com/fmtlib/fmt/issues/2017).
-
-# 7.1.2 - 2020-11-04
-
--   Fixed floating point formatting with large precision
-    (https://github.com/fmtlib/fmt/issues/1976).
-
-# 7.1.1 - 2020-11-01
-
--   Fixed ABI compatibility with 7.0.x
-    (https://github.com/fmtlib/fmt/issues/1961).
--   Added the `FMT_ARM_ABI_COMPATIBILITY` macro to work around ABI
-    incompatibility between GCC and Clang on ARM
-    (https://github.com/fmtlib/fmt/issues/1919).
--   Worked around a SFINAE bug in GCC 8
-    (https://github.com/fmtlib/fmt/issues/1957).
--   Fixed linkage errors when building with GCC\'s LTO
-    (https://github.com/fmtlib/fmt/issues/1955).
--   Fixed a compilation error when building without `__builtin_clz` or
-    equivalent (https://github.com/fmtlib/fmt/pull/1968).
-    Thanks @tohammer.
--   Fixed a sign conversion warning
-    (https://github.com/fmtlib/fmt/pull/1964). Thanks @OptoCloud.
-
-# 7.1.0 - 2020-10-25
-
--   Switched from
-    [Grisu3](https://www.cs.tufts.edu/~nr/cs257/archive/florian-loitsch/printf.pdf)
-    to [Dragonbox](https://github.com/jk-jeon/dragonbox) for the default
-    floating-point formatting which gives the shortest decimal
-    representation with round-trip guarantee and correct rounding
-    (https://github.com/fmtlib/fmt/pull/1882,
-    https://github.com/fmtlib/fmt/pull/1887,
-    https://github.com/fmtlib/fmt/pull/1894). This makes {fmt}
-    up to 20-30x faster than common implementations of
-    `std::ostringstream` and `sprintf` on
-    [dtoa-benchmark](https://github.com/fmtlib/dtoa-benchmark) and
-    faster than double-conversion and Ryū:
-
-    ![](https://user-images.githubusercontent.com/576385/95684665-11719600-0ba8-11eb-8e5b-972ff4e49428.png)
-
-    It is possible to get even better performance at the cost of larger
-    binary size by compiling with the `FMT_USE_FULL_CACHE_DRAGONBOX`
-    macro set to 1.
-
-    Thanks @jk-jeon.
-
--   Added an experimental unsynchronized file output API which, together
-    with [format string
-    compilation](https://fmt.dev/latest/api.html#compile-api), can give
-    [5-9 times speed up compared to
-    fprintf](https://www.zverovich.net/2020/08/04/optimal-file-buffer-size.html)
-    on common platforms ([godbolt](https://godbolt.org/z/nsTcG8)):
-
-    ```c++
-    #include <fmt/os.h>
-
-    int main() {
-      auto f = fmt::output_file("guide");
-      f.print("The answer is {}.", 42);
-    }
-    ```
-
--   Added a formatter for `std::chrono::time_point<system_clock>`
-    (https://github.com/fmtlib/fmt/issues/1819,
-    https://github.com/fmtlib/fmt/pull/1837). For example
-    ([godbolt](https://godbolt.org/z/c4M6fh)):
-
-    ```c++
-    #include <fmt/chrono.h>
-
-    int main() {
-      auto now = std::chrono::system_clock::now();
-      fmt::print("The time is {:%H:%M:%S}.\n", now);
-    }
-    ```
-
-    Thanks @adamburgess.
-
--   Added support for ranges with non-const `begin`/`end` to `fmt::join`
-    (https://github.com/fmtlib/fmt/issues/1784,
-    https://github.com/fmtlib/fmt/pull/1786). For example
-    ([godbolt](https://godbolt.org/z/jP63Tv)):
-
-    ```c++
-    #include <fmt/ranges.h>
-    #include <range/v3/view/filter.hpp>
-
-    int main() {
-      using std::literals::string_literals::operator""s;
-      auto strs = std::array{"a"s, "bb"s, "ccc"s};
-      auto range = strs | ranges::views::filter(
-        [] (const std::string &x) { return x.size() != 2; }
-      );
-      fmt::print("{}\n", fmt::join(range, ""));
-    }
-    ```
-
-    prints \"accc\".
-
-    Thanks @tonyelewis.
-
--   Added a `memory_buffer::append` overload that takes a range
-    (https://github.com/fmtlib/fmt/pull/1806). Thanks @BRevzin.
-
--   Improved handling of single code units in `FMT_COMPILE`. For
-    example:
-
-    ```c++
-    #include <fmt/compile.h>
-
-    char* f(char* buf) {
-      return fmt::format_to(buf, FMT_COMPILE("x{}"), 42);
-    }
-    ```
-
-    compiles to just ([godbolt](https://godbolt.org/z/5vncz3)):
-
-    ```asm
-    _Z1fPc:
-      movb $120, (%rdi)
-      xorl %edx, %edx
-      cmpl $42, _ZN3fmt2v76detail10basic_dataIvE23zero_or_powers_of_10_32E+8(%rip)
-      movl $3, %eax
-      seta %dl
-      subl %edx, %eax
-      movzwl _ZN3fmt2v76detail10basic_dataIvE6digitsE+84(%rip), %edx
-      cltq
-      addq %rdi, %rax
-      movw %dx, -2(%rax)
-      ret
-    ```
-
-    Here a single `mov` instruction writes `'x'` (`$120`) to the output
-    buffer.
-
--   Added dynamic width support to format string compilation
-    (https://github.com/fmtlib/fmt/issues/1809).
-
--   Improved error reporting for unformattable types: now you\'ll get
-    the type name directly in the error message instead of the note:
-
-    ```c++
-    #include <fmt/core.h>
-
-    struct how_about_no {};
-
-    int main() {
-      fmt::print("{}", how_about_no());
-    }
-    ```
-
-    Error ([godbolt](https://godbolt.org/z/GoxM4e)):
-
-    `fmt/core.h:1438:3: error: static_assert failed due to requirement 'fmt::v7::formattable<how_about_no>()' "Cannot format an argument. To make type T formattable provide a formatter<T> specialization: https://fmt.dev/latest/api.html#udt" ...`
-
--   Added the
-    [make_args_checked](https://fmt.dev/7.1.0/api.html#argument-lists)
-    function template that allows you to write formatting functions with
-    compile-time format string checks and avoid binary code bloat
-    ([godbolt](https://godbolt.org/z/PEf9qr)):
-
-    ```c++
-    void vlog(const char* file, int line, fmt::string_view format,
-              fmt::format_args args) {
-      fmt::print("{}: {}: ", file, line);
-      fmt::vprint(format, args);
-    }
-
-    template <typename S, typename... Args>
-    void log(const char* file, int line, const S& format, Args&&... args) {
-      vlog(file, line, format,
-          fmt::make_args_checked<Args...>(format, args...));
-    }
-
-    #define MY_LOG(format, ...) \
-      log(__FILE__, __LINE__, FMT_STRING(format), __VA_ARGS__)
-
-    MY_LOG("invalid squishiness: {}", 42);
-    ```
-
--   Replaced `snprintf` fallback with a faster internal IEEE 754 `float`
-    and `double` formatter for arbitrary precision. For example
-    ([godbolt](https://godbolt.org/z/dPhWvj)):
-
-    ```c++
-    #include <fmt/core.h>
-
-    int main() {
-      fmt::print("{:.500}\n", 4.9406564584124654E-324);
-    }
-    ```
-
-    prints
-
-    `4.9406564584124654417656879286822137236505980261432476442558568250067550727020875186529983636163599237979656469544571773092665671035593979639877479601078187812630071319031140452784581716784898210368871863605699873072305000638740915356498438731247339727316961514003171538539807412623856559117102665855668676818703956031062493194527159149245532930545654440112748012970999954193198940908041656332452475714786901472678015935523861155013480352649347201937902681071074917033322268447533357208324319360923829e-324`.
-
--   Made `format_to_n` and `formatted_size` part of the [core
-    API](https://fmt.dev/latest/api.html#core-api)
-    ([godbolt](https://godbolt.org/z/sPjY1K)):
-
-    ```c++
-    #include <fmt/core.h>
-
-    int main() {
-      char buffer[10];
-      auto result = fmt::format_to_n(buffer, sizeof(buffer), "{}", 42);
-    }
-    ```
-
--   Added `fmt::format_to_n` overload with format string compilation
-    (https://github.com/fmtlib/fmt/issues/1764,
-    https://github.com/fmtlib/fmt/pull/1767,
-    https://github.com/fmtlib/fmt/pull/1869). For example
-    ([godbolt](https://godbolt.org/z/93h86q)):
-
-    ```c++
-    #include <fmt/compile.h>
-
-    int main() {
-      char buffer[8];
-      fmt::format_to_n(buffer, sizeof(buffer), FMT_COMPILE("{}"), 42);
-    }
-    ```
-
-    Thanks @Kurkin and @alexezeder.
-
--   Added `fmt::format_to` overload that take `text_style`
-    (https://github.com/fmtlib/fmt/issues/1593,
-    https://github.com/fmtlib/fmt/issues/1842,
-    https://github.com/fmtlib/fmt/pull/1843). For example
-    ([godbolt](https://godbolt.org/z/91153r)):
-
-    ```c++
-    #include <fmt/color.h>
-
-    int main() {
-      std::string out;
-      fmt::format_to(std::back_inserter(out),
-                     fmt::emphasis::bold | fg(fmt::color::red),
-                     "The answer is {}.", 42);
-    }
-    ```
-
-    Thanks @Naios.
-
--   Made the `'#'` specifier emit trailing zeros in addition to the
-    decimal point (https://github.com/fmtlib/fmt/issues/1797).
-    For example ([godbolt](https://godbolt.org/z/bhdcW9)):
-
-    ```c++
-    #include <fmt/core.h>
-
-    int main() {
-      fmt::print("{:#.2g}", 0.5);
-    }
-    ```
-
-    prints `0.50`.
-
--   Changed the default floating point format to not include `.0` for
-    consistency with `std::format` and `std::to_chars`
-    (https://github.com/fmtlib/fmt/issues/1893,
-    https://github.com/fmtlib/fmt/issues/1943). It is possible
-    to get the decimal point and trailing zero with the `#` specifier.
-
--   Fixed an issue with floating-point formatting that could result in
-    addition of a non-significant trailing zero in rare cases e.g.
-    `1.00e-34` instead of `1.0e-34`
-    (https://github.com/fmtlib/fmt/issues/1873,
-    https://github.com/fmtlib/fmt/issues/1917).
-
--   Made `fmt::to_string` fallback on `ostream` insertion operator if
-    the `formatter` specialization is not provided
-    (https://github.com/fmtlib/fmt/issues/1815,
-    https://github.com/fmtlib/fmt/pull/1829). Thanks @alexezeder.
-
--   Added support for the append mode to the experimental file API and
-    improved `fcntl.h` detection.
-    (https://github.com/fmtlib/fmt/pull/1847,
-    https://github.com/fmtlib/fmt/pull/1848). Thanks @t-wiser.
-
--   Fixed handling of types that have both an implicit conversion
-    operator and an overloaded `ostream` insertion operator
-    (https://github.com/fmtlib/fmt/issues/1766).
-
--   Fixed a slicing issue in an internal iterator type
-    (https://github.com/fmtlib/fmt/pull/1822). Thanks @BRevzin.
-
--   Fixed an issue in locale-specific integer formatting
-    (https://github.com/fmtlib/fmt/issues/1927).
-
--   Fixed handling of exotic code unit types
-    (https://github.com/fmtlib/fmt/issues/1870,
-    https://github.com/fmtlib/fmt/issues/1932).
-
--   Improved `FMT_ALWAYS_INLINE`
-    (https://github.com/fmtlib/fmt/pull/1878). Thanks @jk-jeon.
-
--   Removed dependency on `windows.h`
-    (https://github.com/fmtlib/fmt/pull/1900). Thanks @bernd5.
-
--   Optimized counting of decimal digits on MSVC
-    (https://github.com/fmtlib/fmt/pull/1890). Thanks @mwinterb.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/issues/1772,
-    https://github.com/fmtlib/fmt/pull/1775,
-    https://github.com/fmtlib/fmt/pull/1792,
-    https://github.com/fmtlib/fmt/pull/1838,
-    https://github.com/fmtlib/fmt/pull/1888,
-    https://github.com/fmtlib/fmt/pull/1918,
-    https://github.com/fmtlib/fmt/pull/1939).
-    Thanks @leolchat, @pepsiman, @Klaim, @ravijanjam, @francesco-st and @udnaan.
-
--   Added the `FMT_REDUCE_INT_INSTANTIATIONS` CMake option that reduces
-    the binary code size at the cost of some integer formatting
-    performance. This can be useful for extremely memory-constrained
-    embedded systems
-    (https://github.com/fmtlib/fmt/issues/1778,
-    https://github.com/fmtlib/fmt/pull/1781). Thanks @kammce.
-
--   Added the `FMT_USE_INLINE_NAMESPACES` macro to control usage of
-    inline namespaces
-    (https://github.com/fmtlib/fmt/pull/1945). Thanks @darklukee.
-
--   Improved build configuration
-    (https://github.com/fmtlib/fmt/pull/1760,
-    https://github.com/fmtlib/fmt/pull/1770,
-    https://github.com/fmtlib/fmt/issues/1779,
-    https://github.com/fmtlib/fmt/pull/1783,
-    https://github.com/fmtlib/fmt/pull/1823).
-    Thanks @dvetutnev, @xvitaly, @tambry, @medithe and @martinwuehrer.
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/pull/1790,
-    https://github.com/fmtlib/fmt/pull/1802,
-    https://github.com/fmtlib/fmt/pull/1808,
-    https://github.com/fmtlib/fmt/issues/1810,
-    https://github.com/fmtlib/fmt/issues/1811,
-    https://github.com/fmtlib/fmt/pull/1812,
-    https://github.com/fmtlib/fmt/pull/1814,
-    https://github.com/fmtlib/fmt/pull/1816,
-    https://github.com/fmtlib/fmt/pull/1817,
-    https://github.com/fmtlib/fmt/pull/1818,
-    https://github.com/fmtlib/fmt/issues/1825,
-    https://github.com/fmtlib/fmt/pull/1836,
-    https://github.com/fmtlib/fmt/pull/1855,
-    https://github.com/fmtlib/fmt/pull/1856,
-    https://github.com/fmtlib/fmt/pull/1860,
-    https://github.com/fmtlib/fmt/pull/1877,
-    https://github.com/fmtlib/fmt/pull/1879,
-    https://github.com/fmtlib/fmt/pull/1880,
-    https://github.com/fmtlib/fmt/issues/1896,
-    https://github.com/fmtlib/fmt/pull/1897,
-    https://github.com/fmtlib/fmt/pull/1898,
-    https://github.com/fmtlib/fmt/issues/1904,
-    https://github.com/fmtlib/fmt/pull/1908,
-    https://github.com/fmtlib/fmt/issues/1911,
-    https://github.com/fmtlib/fmt/issues/1912,
-    https://github.com/fmtlib/fmt/issues/1928,
-    https://github.com/fmtlib/fmt/pull/1929,
-    https://github.com/fmtlib/fmt/issues/1935,
-    https://github.com/fmtlib/fmt/pull/1937,
-    https://github.com/fmtlib/fmt/pull/1942,
-    https://github.com/fmtlib/fmt/issues/1949).
-    Thanks @TheQwertiest, @medithe, @martinwuehrer, @n16h7hunt3r, @Othereum,
-    @gsjaardema, @AlexanderLanin, @gcerretani, @chronoxor, @noizefloor,
-    @akohlmey, @jk-jeon, @rimathia, @rglarix, @moiwi, @heckad, @MarcDirven.
-    @BartSiwek and @darklukee.
-
-# 7.0.3 - 2020-08-06
-
--   Worked around broken `numeric_limits` for 128-bit integers
-    (https://github.com/fmtlib/fmt/issues/1787).
--   Added error reporting on missing named arguments
-    (https://github.com/fmtlib/fmt/issues/1796).
--   Stopped using 128-bit integers with clang-cl
-    (https://github.com/fmtlib/fmt/pull/1800). Thanks @Kingcom.
--   Fixed issues in locale-specific integer formatting
-    (https://github.com/fmtlib/fmt/issues/1782,
-    https://github.com/fmtlib/fmt/issues/1801).
-
-# 7.0.2 - 2020-07-29
-
--   Worked around broken `numeric_limits` for 128-bit integers
-    (https://github.com/fmtlib/fmt/issues/1725).
--   Fixed compatibility with CMake 3.4
-    (https://github.com/fmtlib/fmt/issues/1779).
--   Fixed handling of digit separators in locale-specific formatting
-    (https://github.com/fmtlib/fmt/issues/1782).
-
-# 7.0.1 - 2020-07-07
-
--   Updated the inline version namespace name.
--   Worked around a gcc bug in mangling of alias templates
-    (https://github.com/fmtlib/fmt/issues/1753).
--   Fixed a linkage error on Windows
-    (https://github.com/fmtlib/fmt/issues/1757). Thanks @Kurkin.
--   Fixed minor issues with the documentation.
-
-# 7.0.0 - 2020-07-05
-
--   Reduced the library size. For example, on macOS a stripped test
-    binary statically linked with {fmt} [shrank from \~368k to less than
-    100k](http://www.zverovich.net/2020/05/21/reducing-library-size.html).
-
--   Added a simpler and more efficient [format string compilation
-    API](https://fmt.dev/7.0.0/api.html#compile-api):
-
-    ```c++
-    #include <fmt/compile.h>
-
-    // Converts 42 into std::string using the most efficient method and no
-    // runtime format string processing.
-    std::string s = fmt::format(FMT_COMPILE("{}"), 42);
-    ```
-
-    The old `fmt::compile` API is now deprecated.
-
--   Optimized integer formatting: `format_to` with format string
-    compilation and a stack-allocated buffer is now [faster than
-    to_chars on both libc++ and
-    libstdc++](http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html).
-
--   Optimized handling of small format strings. For example,
-
-    ```c++
-    fmt::format("Result: {}: ({},{},{},{})", str1, str2, str3, str4, str5)
-    ```
-
-    is now \~40% faster
-    (https://github.com/fmtlib/fmt/issues/1685).
-
--   Applied extern templates to improve compile times when using the
-    core API and `fmt/format.h`
-    (https://github.com/fmtlib/fmt/issues/1452). For example,
-    on macOS with clang the compile time of a test translation unit
-    dropped from 2.3s to 0.3s with `-O2` and from 0.6s to 0.3s with the
-    default settings (`-O0`).
-
-    Before (`-O2`):
-
-        % time c++ -c test.cc -I include -std=c++17 -O2
-        c++ -c test.cc -I include -std=c++17 -O2  2.22s user 0.08s system 99% cpu 2.311 total
-
-    After (`-O2`):
-
-        % time c++ -c test.cc -I include -std=c++17 -O2
-        c++ -c test.cc -I include -std=c++17 -O2  0.26s user 0.04s system 98% cpu 0.303 total
-
-    Before (default):
-
-        % time c++ -c test.cc -I include -std=c++17
-        c++ -c test.cc -I include -std=c++17  0.53s user 0.06s system 98% cpu 0.601 total
-
-    After (default):
-
-        % time c++ -c test.cc -I include -std=c++17
-        c++ -c test.cc -I include -std=c++17  0.24s user 0.06s system 98% cpu 0.301 total
-
-    It is still recommended to use `fmt/core.h` instead of
-    `fmt/format.h` but the compile time difference is now smaller.
-    Thanks @alex3d for the suggestion.
-
--   Named arguments are now stored on stack (no dynamic memory
-    allocations) and the compiled code is more compact and efficient.
-    For example
-
-    ```c++
-    #include <fmt/core.h>
-
-    int main() {
-      fmt::print("The answer is {answer}\n", fmt::arg("answer", 42));
-    }
-    ```
-
-    compiles to just ([godbolt](https://godbolt.org/z/NcfEp_))
-
-    ```asm
-    .LC0:
-            .string "answer"
-    .LC1:
-            .string "The answer is {answer}\n"
-    main:
-            sub     rsp, 56
-            mov     edi, OFFSET FLAT:.LC1
-            mov     esi, 23
-            movabs  rdx, 4611686018427387905
-            lea     rax, [rsp+32]
-            lea     rcx, [rsp+16]
-            mov     QWORD PTR [rsp+8], 1
-            mov     QWORD PTR [rsp], rax
-            mov     DWORD PTR [rsp+16], 42
-            mov     QWORD PTR [rsp+32], OFFSET FLAT:.LC0
-            mov     DWORD PTR [rsp+40], 0
-            call    fmt::v6::vprint(fmt::v6::basic_string_view<char>,
-                                    fmt::v6::format_args)
-            xor     eax, eax
-            add     rsp, 56
-            ret
-
-        .L.str.1:
-                .asciz  "answer"
-    ```
-
--   Implemented compile-time checks for dynamic width and precision
-    (https://github.com/fmtlib/fmt/issues/1614):
-
-    ```c++
-    #include <fmt/format.h>
-
-    int main() {
-      fmt::print(FMT_STRING("{0:{1}}"), 42);
-    }
-    ```
-
-    now gives a compilation error because argument 1 doesn\'t exist:
-
-        In file included from test.cc:1:
-        include/fmt/format.h:2726:27: error: constexpr variable 'invalid_format' must be
-        initialized by a constant expression
-          FMT_CONSTEXPR_DECL bool invalid_format =
-                                  ^
-        ...
-        include/fmt/core.h:569:26: note: in call to
-        '&checker(s, {}).context_->on_error(&"argument not found"[0])'
-            if (id >= num_args_) on_error("argument not found");
-                                ^
-
--   Added sentinel support to `fmt::join`
-    (https://github.com/fmtlib/fmt/pull/1689)
-
-    ```c++
-    struct zstring_sentinel {};
-    bool operator==(const char* p, zstring_sentinel) { return *p == '\0'; }
-    bool operator!=(const char* p, zstring_sentinel) { return *p != '\0'; }
-
-    struct zstring {
-      const char* p;
-      const char* begin() const { return p; }
-      zstring_sentinel end() const { return {}; }
-    };
-
-    auto s = fmt::format("{}", fmt::join(zstring{"hello"}, "_"));
-    // s == "h_e_l_l_o"
-    ```
-
-    Thanks @BRevzin.
-
--   Added support for named arguments, `clear` and `reserve` to
-    `dynamic_format_arg_store`
-    (https://github.com/fmtlib/fmt/issues/1655,
-    https://github.com/fmtlib/fmt/pull/1663,
-    https://github.com/fmtlib/fmt/pull/1674,
-    https://github.com/fmtlib/fmt/pull/1677). Thanks @vsolontsov-ll.
-
--   Added support for the `'c'` format specifier to integral types for
-    compatibility with `std::format`
-    (https://github.com/fmtlib/fmt/issues/1652).
-
--   Replaced the `'n'` format specifier with `'L'` for compatibility
-    with `std::format`
-    (https://github.com/fmtlib/fmt/issues/1624). The `'n'`
-    specifier can be enabled via the `FMT_DEPRECATED_N_SPECIFIER` macro.
-
--   The `'='` format specifier is now disabled by default for
-    compatibility with `std::format`. It can be enabled via the
-    `FMT_DEPRECATED_NUMERIC_ALIGN` macro.
-
--   Removed the following deprecated APIs:
-
-    -   `FMT_STRING_ALIAS` and `fmt` macros - replaced by `FMT_STRING`
-    -   `fmt::basic_string_view::char_type` - replaced by
-        `fmt::basic_string_view::value_type`
-    -   `convert_to_int`
-    -   `format_arg_store::types`
-    -   `*parse_context` - replaced by `*format_parse_context`
-    -   `FMT_DEPRECATED_INCLUDE_OS`
-    -   `FMT_DEPRECATED_PERCENT` - incompatible with `std::format`
-    -   `*writer` - replaced by compiled format API
-
--   Renamed the `internal` namespace to `detail`
-    (https://github.com/fmtlib/fmt/issues/1538). The former is
-    still provided as an alias if the `FMT_USE_INTERNAL` macro is
-    defined.
-
--   Improved compatibility between `fmt::printf` with the standard specs
-    (https://github.com/fmtlib/fmt/issues/1595,
-    https://github.com/fmtlib/fmt/pull/1682,
-    https://github.com/fmtlib/fmt/pull/1683,
-    https://github.com/fmtlib/fmt/pull/1687,
-    https://github.com/fmtlib/fmt/pull/1699). Thanks @rimathia.
-
--   Fixed handling of `operator<<` overloads that use `copyfmt`
-    (https://github.com/fmtlib/fmt/issues/1666).
-
--   Added the `FMT_OS` CMake option to control inclusion of OS-specific
-    APIs in the fmt target. This can be useful for embedded platforms
-    (https://github.com/fmtlib/fmt/issues/1654,
-    https://github.com/fmtlib/fmt/pull/1656). Thanks @kwesolowski.
-
--   Replaced `FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION` with the
-    `FMT_FUZZ` macro to prevent interfering with fuzzing of projects
-    using {fmt} (https://github.com/fmtlib/fmt/pull/1650).
-    Thanks @asraa.
-
--   Fixed compatibility with emscripten
-    (https://github.com/fmtlib/fmt/issues/1636,
-    https://github.com/fmtlib/fmt/pull/1637). Thanks @ArthurSonzogni.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/issues/704,
-    https://github.com/fmtlib/fmt/pull/1643,
-    https://github.com/fmtlib/fmt/pull/1660,
-    https://github.com/fmtlib/fmt/pull/1681,
-    https://github.com/fmtlib/fmt/pull/1691,
-    https://github.com/fmtlib/fmt/pull/1706,
-    https://github.com/fmtlib/fmt/pull/1714,
-    https://github.com/fmtlib/fmt/pull/1721,
-    https://github.com/fmtlib/fmt/pull/1739,
-    https://github.com/fmtlib/fmt/pull/1740,
-    https://github.com/fmtlib/fmt/pull/1741,
-    https://github.com/fmtlib/fmt/pull/1751).
-    Thanks @senior7515, @lsr0, @puetzk, @fpelliccioni, Alexey Kuzmenko, @jelly,
-    @claremacrae, @jiapengwen, @gsjaardema and @alexey-milovidov.
-
--   Implemented various build configuration fixes and improvements
-    (https://github.com/fmtlib/fmt/pull/1603,
-    https://github.com/fmtlib/fmt/pull/1657,
-    https://github.com/fmtlib/fmt/pull/1702,
-    https://github.com/fmtlib/fmt/pull/1728).
-    Thanks @scramsby, @jtojnar, @orivej and @flagarde.
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/pull/1616,
-    https://github.com/fmtlib/fmt/issues/1620,
-    https://github.com/fmtlib/fmt/issues/1622,
-    https://github.com/fmtlib/fmt/issues/1625,
-    https://github.com/fmtlib/fmt/pull/1627,
-    https://github.com/fmtlib/fmt/issues/1628,
-    https://github.com/fmtlib/fmt/pull/1629,
-    https://github.com/fmtlib/fmt/issues/1631,
-    https://github.com/fmtlib/fmt/pull/1633,
-    https://github.com/fmtlib/fmt/pull/1649,
-    https://github.com/fmtlib/fmt/issues/1658,
-    https://github.com/fmtlib/fmt/pull/1661,
-    https://github.com/fmtlib/fmt/pull/1667,
-    https://github.com/fmtlib/fmt/issues/1668,
-    https://github.com/fmtlib/fmt/pull/1669,
-    https://github.com/fmtlib/fmt/issues/1692,
-    https://github.com/fmtlib/fmt/pull/1696,
-    https://github.com/fmtlib/fmt/pull/1697,
-    https://github.com/fmtlib/fmt/issues/1707,
-    https://github.com/fmtlib/fmt/pull/1712,
-    https://github.com/fmtlib/fmt/pull/1716,
-    https://github.com/fmtlib/fmt/pull/1722,
-    https://github.com/fmtlib/fmt/issues/1724,
-    https://github.com/fmtlib/fmt/pull/1729,
-    https://github.com/fmtlib/fmt/pull/1738,
-    https://github.com/fmtlib/fmt/issues/1742,
-    https://github.com/fmtlib/fmt/issues/1743,
-    https://github.com/fmtlib/fmt/pull/1744,
-    https://github.com/fmtlib/fmt/issues/1747,
-    https://github.com/fmtlib/fmt/pull/1750).
-    Thanks @gsjaardema, @gabime, @johnor, @Kurkin, @invexed, @peterbell10,
-    @daixtrose, @petrutlucian94, @Neargye, @ambitslix, @gabime, @erthink,
-    @tohammer and @0x8000-0000.
-
-# 6.2.1 - 2020-05-09
-
--   Fixed ostream support in `sprintf`
-    (https://github.com/fmtlib/fmt/issues/1631).
--   Fixed type detection when using implicit conversion to `string_view`
-    and ostream `operator<<` inconsistently
-    (https://github.com/fmtlib/fmt/issues/1662).
-
-# 6.2.0 - 2020-04-05
-
--   Improved error reporting when trying to format an object of a
-    non-formattable type:
-
-    ```c++
-    fmt::format("{}", S());
-    ```
-
-    now gives:
-
-        include/fmt/core.h:1015:5: error: static_assert failed due to requirement
-        'formattable' "Cannot format argument. To make type T formattable provide a
-        formatter<T> specialization:
-        https://fmt.dev/latest/api.html#formatting-user-defined-types"
-            static_assert(
-            ^
-        ...
-        note: in instantiation of function template specialization
-        'fmt::v6::format<char [3], S, char>' requested here
-          fmt::format("{}", S());
-               ^
-
-    if `S` is not formattable.
-
--   Reduced the library size by \~10%.
-
--   Always print decimal point if `#` is specified
-    (https://github.com/fmtlib/fmt/issues/1476,
-    https://github.com/fmtlib/fmt/issues/1498):
-
-    ```c++
-    fmt::print("{:#.0f}", 42.0);
-    ```
-
-    now prints `42.`
-
--   Implemented the `'L'` specifier for locale-specific numeric
-    formatting to improve compatibility with `std::format`. The `'n'`
-    specifier is now deprecated and will be removed in the next major
-    release.
-
--   Moved OS-specific APIs such as `windows_error` from `fmt/format.h`
-    to `fmt/os.h`. You can define `FMT_DEPRECATED_INCLUDE_OS` to
-    automatically include `fmt/os.h` from `fmt/format.h` for
-    compatibility but this will be disabled in the next major release.
-
--   Added precision overflow detection in floating-point formatting.
-
--   Implemented detection of invalid use of `fmt::arg`.
-
--   Used `type_identity` to block unnecessary template argument
-    deduction. Thanks Tim Song.
-
--   Improved UTF-8 handling
-    (https://github.com/fmtlib/fmt/issues/1109):
-
-    ```c++
-    fmt::print("┌{0:─^{2}}┐\n"
-               "│{1: ^{2}}│\n"
-               "└{0:─^{2}}┘\n", "", "Привет, мир!", 20);
-    ```
-
-    now prints:
-
-        ┌────────────────────┐
-        │    Привет, мир!    │
-        └────────────────────┘
-
-    on systems that support Unicode.
-
--   Added experimental dynamic argument storage
-    (https://github.com/fmtlib/fmt/issues/1170,
-    https://github.com/fmtlib/fmt/pull/1584):
-
-    ```c++
-    fmt::dynamic_format_arg_store<fmt::format_context> store;
-    store.push_back("answer");
-    store.push_back(42);
-    fmt::vprint("The {} is {}.\n", store);
-    ```
-
-    prints:
-
-        The answer is 42.
-
-    Thanks @vsolontsov-ll.
-
--   Made `fmt::join` accept `initializer_list`
-    (https://github.com/fmtlib/fmt/pull/1591). Thanks @Rapotkinnik.
-
--   Fixed handling of empty tuples
-    (https://github.com/fmtlib/fmt/issues/1588).
-
--   Fixed handling of output iterators in `format_to_n`
-    (https://github.com/fmtlib/fmt/issues/1506).
-
--   Fixed formatting of `std::chrono::duration` types to wide output
-    (https://github.com/fmtlib/fmt/pull/1533). Thanks @zeffy.
-
--   Added const `begin` and `end` overload to buffers
-    (https://github.com/fmtlib/fmt/pull/1553). Thanks @dominicpoeschko.
-
--   Added the ability to disable floating-point formatting via
-    `FMT_USE_FLOAT`, `FMT_USE_DOUBLE` and `FMT_USE_LONG_DOUBLE` macros
-    for extremely memory-constrained embedded system
-    (https://github.com/fmtlib/fmt/pull/1590). Thanks @albaguirre.
-
--   Made `FMT_STRING` work with `constexpr` `string_view`
-    (https://github.com/fmtlib/fmt/pull/1589). Thanks @scramsby.
-
--   Implemented a minor optimization in the format string parser
-    (https://github.com/fmtlib/fmt/pull/1560). Thanks @IkarusDeveloper.
-
--   Improved attribute detection
-    (https://github.com/fmtlib/fmt/pull/1469,
-    https://github.com/fmtlib/fmt/pull/1475,
-    https://github.com/fmtlib/fmt/pull/1576).
-    Thanks @federico-busato, @chronoxor and @refnum.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/pull/1481,
-    https://github.com/fmtlib/fmt/pull/1523).
-    Thanks @JackBoosY and @imba-tjd.
-
--   Fixed symbol visibility on Linux when compiling with
-    `-fvisibility=hidden`
-    (https://github.com/fmtlib/fmt/pull/1535). Thanks @milianw.
-
--   Implemented various build configuration fixes and improvements
-    (https://github.com/fmtlib/fmt/issues/1264,
-    https://github.com/fmtlib/fmt/issues/1460,
-    https://github.com/fmtlib/fmt/pull/1534,
-    https://github.com/fmtlib/fmt/issues/1536,
-    https://github.com/fmtlib/fmt/issues/1545,
-    https://github.com/fmtlib/fmt/pull/1546,
-    https://github.com/fmtlib/fmt/issues/1566,
-    https://github.com/fmtlib/fmt/pull/1582,
-    https://github.com/fmtlib/fmt/issues/1597,
-    https://github.com/fmtlib/fmt/pull/1598).
-    Thanks @ambitslix, @jwillikers and @stac47.
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/pull/1433,
-    https://github.com/fmtlib/fmt/issues/1461,
-    https://github.com/fmtlib/fmt/pull/1470,
-    https://github.com/fmtlib/fmt/pull/1480,
-    https://github.com/fmtlib/fmt/pull/1485,
-    https://github.com/fmtlib/fmt/pull/1492,
-    https://github.com/fmtlib/fmt/issues/1493,
-    https://github.com/fmtlib/fmt/issues/1504,
-    https://github.com/fmtlib/fmt/pull/1505,
-    https://github.com/fmtlib/fmt/pull/1512,
-    https://github.com/fmtlib/fmt/issues/1515,
-    https://github.com/fmtlib/fmt/pull/1516,
-    https://github.com/fmtlib/fmt/pull/1518,
-    https://github.com/fmtlib/fmt/pull/1519,
-    https://github.com/fmtlib/fmt/pull/1520,
-    https://github.com/fmtlib/fmt/pull/1521,
-    https://github.com/fmtlib/fmt/pull/1522,
-    https://github.com/fmtlib/fmt/issues/1524,
-    https://github.com/fmtlib/fmt/pull/1530,
-    https://github.com/fmtlib/fmt/issues/1531,
-    https://github.com/fmtlib/fmt/pull/1532,
-    https://github.com/fmtlib/fmt/issues/1539,
-    https://github.com/fmtlib/fmt/issues/1547,
-    https://github.com/fmtlib/fmt/issues/1548,
-    https://github.com/fmtlib/fmt/pull/1554,
-    https://github.com/fmtlib/fmt/issues/1567,
-    https://github.com/fmtlib/fmt/pull/1568,
-    https://github.com/fmtlib/fmt/pull/1569,
-    https://github.com/fmtlib/fmt/pull/1571,
-    https://github.com/fmtlib/fmt/pull/1573,
-    https://github.com/fmtlib/fmt/pull/1575,
-    https://github.com/fmtlib/fmt/pull/1581,
-    https://github.com/fmtlib/fmt/issues/1583,
-    https://github.com/fmtlib/fmt/issues/1586,
-    https://github.com/fmtlib/fmt/issues/1587,
-    https://github.com/fmtlib/fmt/issues/1594,
-    https://github.com/fmtlib/fmt/pull/1596,
-    https://github.com/fmtlib/fmt/issues/1604,
-    https://github.com/fmtlib/fmt/pull/1606,
-    https://github.com/fmtlib/fmt/issues/1607,
-    https://github.com/fmtlib/fmt/issues/1609).
-    Thanks @marti4d, @iPherian, @parkertomatoes, @gsjaardema, @chronoxor,
-    @DanielaE, @torsten48, @tohammer, @lefticus, @ryusakki, @adnsv, @fghzxm,
-    @refnum, @pramodk, @Spirrwell and @scramsby.
-
-# 6.1.2 - 2019-12-11
-
--   Fixed ABI compatibility with `libfmt.so.6.0.0`
-    (https://github.com/fmtlib/fmt/issues/1471).
--   Fixed handling types convertible to `std::string_view`
-    (https://github.com/fmtlib/fmt/pull/1451). Thanks @denizevrenci.
--   Made CUDA test an opt-in enabled via the `FMT_CUDA_TEST` CMake
-    option.
--   Fixed sign conversion warnings
-    (https://github.com/fmtlib/fmt/pull/1440). Thanks @0x8000-0000.
-
-# 6.1.1 - 2019-12-04
-
--   Fixed shared library build on Windows
-    (https://github.com/fmtlib/fmt/pull/1443,
-    https://github.com/fmtlib/fmt/issues/1445,
-    https://github.com/fmtlib/fmt/pull/1446,
-    https://github.com/fmtlib/fmt/issues/1450).
-    Thanks @egorpugin and @bbolli.
--   Added a missing decimal point in exponent notation with trailing
-    zeros.
--   Removed deprecated `format_arg_store::TYPES`.
-
-# 6.1.0 - 2019-12-01
-
--   {fmt} now formats IEEE 754 `float` and `double` using the shortest
-    decimal representation with correct rounding by default:
-
-    ```c++
-    #include <cmath>
-    #include <fmt/core.h>
-
-    int main() {
-      fmt::print("{}", M_PI);
-    }
-    ```
-
-    prints `3.141592653589793`.
-
--   Made the fast binary to decimal floating-point formatter the
-    default, simplified it and improved performance. {fmt} is now 15
-    times faster than libc++\'s `std::ostringstream`, 11 times faster
-    than `printf` and 10% faster than double-conversion on
-    [dtoa-benchmark](https://github.com/fmtlib/dtoa-benchmark):
-
-    | Function      | Time (ns) | Speedup |
-    | ------------- | --------: | ------: |
-    | ostringstream | 1,346.30  | 1.00x   |
-    | ostrstream    | 1,195.74  | 1.13x   |
-    | sprintf       | 995.08    | 1.35x   |
-    | doubleconv    | 99.10     | 13.59x  |
-    | fmt           | 88.34     | 15.24x  |
-
-    ![](https://user-images.githubusercontent.com/576385/69767160-cdaca400-112f-11ea-9fc5-347c9f83caad.png)
-
--   {fmt} no longer converts `float` arguments to `double`. In
-    particular this improves the default (shortest) representation of
-    floats and makes `fmt::format` consistent with `std::format` specs
-    (https://github.com/fmtlib/fmt/issues/1336,
-    https://github.com/fmtlib/fmt/issues/1353,
-    https://github.com/fmtlib/fmt/pull/1360,
-    https://github.com/fmtlib/fmt/pull/1361):
-
-    ```c++
-    fmt::print("{}", 0.1f);
-    ```
-
-    prints `0.1` instead of `0.10000000149011612`.
-
-    Thanks @orivej.
-
--   Made floating-point formatting output consistent with
-    `printf`/iostreams
-    (https://github.com/fmtlib/fmt/issues/1376,
-    https://github.com/fmtlib/fmt/issues/1417).
-
--   Added support for 128-bit integers
-    (https://github.com/fmtlib/fmt/pull/1287):
-
-    ```c++
-    fmt::print("{}", std::numeric_limits<__int128_t>::max());
-    ```
-
-    prints `170141183460469231731687303715884105727`.
-
-    Thanks @denizevrenci.
-
--   The overload of `print` that takes `text_style` is now atomic, i.e.
-    the output from different threads doesn\'t interleave
-    (https://github.com/fmtlib/fmt/pull/1351). Thanks @tankiJong.
-
--   Made compile time in the header-only mode \~20% faster by reducing
-    the number of template instantiations. `wchar_t` overload of
-    `vprint` was moved from `fmt/core.h` to `fmt/format.h`.
-
--   Added an overload of `fmt::join` that works with tuples
-    (https://github.com/fmtlib/fmt/issues/1322,
-    https://github.com/fmtlib/fmt/pull/1330):
-
-    ```c++
-    #include <tuple>
-    #include <fmt/ranges.h>
-
-    int main() {
-      std::tuple<char, int, float> t{'a', 1, 2.0f};
-      fmt::print("{}", t);
-    }
-    ```
-
-    prints `('a', 1, 2.0)`.
-
-    Thanks @jeremyong.
-
--   Changed formatting of octal zero with prefix from \"00\" to \"0\":
-
-    ```c++
-    fmt::print("{:#o}", 0);
-    ```
-
-    prints `0`.
-
--   The locale is now passed to ostream insertion (`<<`) operators
-    (https://github.com/fmtlib/fmt/pull/1406):
-
-    ```c++
-    #include <fmt/locale.h>
-    #include <fmt/ostream.h>
-
-    struct S {
-      double value;
-    };
-
-    std::ostream& operator<<(std::ostream& os, S s) {
-      return os << s.value;
-    }
-
-    int main() {
-      auto s = fmt::format(std::locale("fr_FR.UTF-8"), "{}", S{0.42});
-      // s == "0,42"
-    }
-    ```
-
-    Thanks @dlaugt.
-
--   Locale-specific number formatting now uses grouping
-    (https://github.com/fmtlib/fmt/issues/1393,
-    https://github.com/fmtlib/fmt/pull/1394). Thanks @skrdaniel.
-
--   Fixed handling of types with deleted implicit rvalue conversion to
-    `const char**` (https://github.com/fmtlib/fmt/issues/1421):
-
-    ```c++
-    struct mystring {
-      operator const char*() const&;
-      operator const char*() &;
-      operator const char*() const&& = delete;
-      operator const char*() && = delete;
-    };
-    mystring str;
-    fmt::print("{}", str); // now compiles
-    ```
-
--   Enums are now mapped to correct underlying types instead of `int`
-    (https://github.com/fmtlib/fmt/pull/1286). Thanks @agmt.
-
--   Enum classes are no longer implicitly converted to `int`
-    (https://github.com/fmtlib/fmt/issues/1424).
-
--   Added `basic_format_parse_context` for consistency with C++20
-    `std::format` and deprecated `basic_parse_context`.
-
--   Fixed handling of UTF-8 in precision
-    (https://github.com/fmtlib/fmt/issues/1389,
-    https://github.com/fmtlib/fmt/pull/1390). Thanks @tajtiattila.
-
--   {fmt} can now be installed on Linux, macOS and Windows with
-    [Conda](https://docs.conda.io/en/latest/) using its
-    [conda-forge](https://conda-forge.org)
-    [package](https://github.com/conda-forge/fmt-feedstock)
-    (https://github.com/fmtlib/fmt/pull/1410):
-
-        conda install -c conda-forge fmt
-
-    Thanks @tdegeus.
-
--   Added a CUDA test (https://github.com/fmtlib/fmt/pull/1285,
-    https://github.com/fmtlib/fmt/pull/1317).
-    Thanks @luncliff and @risa2000.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/pull/1276,
-    https://github.com/fmtlib/fmt/issues/1291,
-    https://github.com/fmtlib/fmt/issues/1296,
-    https://github.com/fmtlib/fmt/pull/1315,
-    https://github.com/fmtlib/fmt/pull/1332,
-    https://github.com/fmtlib/fmt/pull/1337,
-    https://github.com/fmtlib/fmt/issues/1395
-    https://github.com/fmtlib/fmt/pull/1418).
-    Thanks @waywardmonkeys, @pauldreik and @jackoalan.
-
--   Various code improvements
-    (https://github.com/fmtlib/fmt/pull/1358,
-    https://github.com/fmtlib/fmt/pull/1407).
-    Thanks @orivej and @dpacbach.
-
--   Fixed compile-time format string checks for user-defined types
-    (https://github.com/fmtlib/fmt/issues/1292).
-
--   Worked around a false positive in `unsigned-integer-overflow` sanitizer
-    (https://github.com/fmtlib/fmt/issues/1377).
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/issues/1273,
-    https://github.com/fmtlib/fmt/pull/1278,
-    https://github.com/fmtlib/fmt/pull/1280,
-    https://github.com/fmtlib/fmt/issues/1281,
-    https://github.com/fmtlib/fmt/issues/1288,
-    https://github.com/fmtlib/fmt/pull/1290,
-    https://github.com/fmtlib/fmt/pull/1301,
-    https://github.com/fmtlib/fmt/issues/1305,
-    https://github.com/fmtlib/fmt/issues/1306,
-    https://github.com/fmtlib/fmt/issues/1309,
-    https://github.com/fmtlib/fmt/pull/1312,
-    https://github.com/fmtlib/fmt/issues/1313,
-    https://github.com/fmtlib/fmt/issues/1316,
-    https://github.com/fmtlib/fmt/issues/1319,
-    https://github.com/fmtlib/fmt/pull/1320,
-    https://github.com/fmtlib/fmt/pull/1326,
-    https://github.com/fmtlib/fmt/pull/1328,
-    https://github.com/fmtlib/fmt/issues/1344,
-    https://github.com/fmtlib/fmt/pull/1345,
-    https://github.com/fmtlib/fmt/pull/1347,
-    https://github.com/fmtlib/fmt/pull/1349,
-    https://github.com/fmtlib/fmt/issues/1354,
-    https://github.com/fmtlib/fmt/issues/1362,
-    https://github.com/fmtlib/fmt/issues/1366,
-    https://github.com/fmtlib/fmt/pull/1364,
-    https://github.com/fmtlib/fmt/pull/1370,
-    https://github.com/fmtlib/fmt/pull/1371,
-    https://github.com/fmtlib/fmt/issues/1385,
-    https://github.com/fmtlib/fmt/issues/1388,
-    https://github.com/fmtlib/fmt/pull/1397,
-    https://github.com/fmtlib/fmt/pull/1414,
-    https://github.com/fmtlib/fmt/pull/1416,
-    https://github.com/fmtlib/fmt/issues/1422
-    https://github.com/fmtlib/fmt/pull/1427,
-    https://github.com/fmtlib/fmt/issues/1431,
-    https://github.com/fmtlib/fmt/pull/1433).
-    Thanks @hhb, @gsjaardema, @gabime, @neheb, @vedranmiletic, @dkavolis,
-    @mwinterb, @orivej, @denizevrenci, @leonklingele, @chronoxor, @kent-tri,
-    @0x8000-0000 and @marti4d.
-
-# 6.0.0 - 2019-08-26
-
--   Switched to the [MIT license](
-    https://github.com/fmtlib/fmt/blob/5a4b24613ba16cc689977c3b5bd8274a3ba1dd1f/LICENSE.rst)
-    with an optional exception that allows distributing binary code
-    without attribution.
-
--   Floating-point formatting is now locale-independent by default:
-
-    ```c++
-    #include <locale>
-    #include <fmt/core.h>
-
-    int main() {
-      std::locale::global(std::locale("ru_RU.UTF-8"));
-      fmt::print("value = {}", 4.2);
-    }
-    ```
-
-    prints \"value = 4.2\" regardless of the locale.
-
-    For locale-specific formatting use the `n` specifier:
-
-    ```c++
-    std::locale::global(std::locale("ru_RU.UTF-8"));
-    fmt::print("value = {:n}", 4.2);
-    ```
-
-    prints \"value = 4,2\".
-
--   Added an experimental Grisu floating-point formatting algorithm
-    implementation (disabled by default). To enable it compile with the
-    `FMT_USE_GRISU` macro defined to 1:
-
-    ```c++
-    #define FMT_USE_GRISU 1
-    #include <fmt/format.h>
-
-    auto s = fmt::format("{}", 4.2); // formats 4.2 using Grisu
-    ```
-
-    With Grisu enabled, {fmt} is 13x faster than `std::ostringstream`
-    (libc++) and 10x faster than `sprintf` on
-    [dtoa-benchmark](https://github.com/fmtlib/dtoa-benchmark) ([full
-    results](https://fmt.dev/unknown_mac64_clang10.0.html)):
-
-    ![](https://user-images.githubusercontent.com/576385/54883977-9fe8c000-4e28-11e9-8bde-272d122e7c52.jpg)
-
--   Separated formatting and parsing contexts for consistency with
-    [C++20 std::format](http://eel.is/c++draft/format), removing the
-    undocumented `basic_format_context::parse_context()` function.
-
--   Added [oss-fuzz](https://github.com/google/oss-fuzz) support
-    (https://github.com/fmtlib/fmt/pull/1199). Thanks @pauldreik.
-
--   `formatter` specializations now always take precedence over
-    `operator<<` (https://github.com/fmtlib/fmt/issues/952):
-
-    ```c++
-    #include <iostream>
-    #include <fmt/ostream.h>
-
-    struct S {};
-
-    std::ostream& operator<<(std::ostream& os, S) {
-      return os << 1;
-    }
-
-    template <>
-    struct fmt::formatter<S> : fmt::formatter<int> {
-      auto format(S, format_context& ctx) {
-        return formatter<int>::format(2, ctx);
-      }
-    };
-
-    int main() {
-      std::cout << S() << "\n"; // prints 1 using operator<<
-      fmt::print("{}\n", S());  // prints 2 using formatter
-    }
-    ```
-
--   Introduced the experimental `fmt::compile` function that does format
-    string compilation
-    (https://github.com/fmtlib/fmt/issues/618,
-    https://github.com/fmtlib/fmt/issues/1169,
-    https://github.com/fmtlib/fmt/pull/1171):
-
-    ```c++
-    #include <fmt/compile.h>
-
-    auto f = fmt::compile<int>("{}");
-    std::string s = fmt::format(f, 42); // can be called multiple times to
-                                        // format different values
-    // s == "42"
-    ```
-
-    It moves the cost of parsing a format string outside of the format
-    function which can be beneficial when identically formatting many
-    objects of the same types. Thanks @stryku.
-
--   Added experimental `%` format specifier that formats floating-point
-    values as percentages
-    (https://github.com/fmtlib/fmt/pull/1060,
-    https://github.com/fmtlib/fmt/pull/1069,
-    https://github.com/fmtlib/fmt/pull/1071):
-
-    ```c++
-    auto s = fmt::format("{:.1%}", 0.42); // s == "42.0%"
-    ```
-
-    Thanks @gawain-bolton.
-
--   Implemented precision for floating-point durations
-    (https://github.com/fmtlib/fmt/issues/1004,
-    https://github.com/fmtlib/fmt/pull/1012):
-
-    ```c++
-    auto s = fmt::format("{:.1}", std::chrono::duration<double>(1.234));
-    // s == 1.2s
-    ```
-
-    Thanks @DanielaE.
-
--   Implemented `chrono` format specifiers `%Q` and `%q` that give the
-    value and the unit respectively
-    (https://github.com/fmtlib/fmt/pull/1019):
-
-    ```c++
-    auto value = fmt::format("{:%Q}", 42s); // value == "42"
-    auto unit  = fmt::format("{:%q}", 42s); // unit == "s"
-    ```
-
-    Thanks @DanielaE.
-
--   Fixed handling of dynamic width in chrono formatter:
-
-    ```c++
-    auto s = fmt::format("{0:{1}%H:%M:%S}", std::chrono::seconds(12345), 12);
-    //                        ^ width argument index                     ^ width
-    // s == "03:25:45    "
-    ```
-
-    Thanks Howard Hinnant.
-
--   Removed deprecated `fmt/time.h`. Use `fmt/chrono.h` instead.
-
--   Added `fmt::format` and `fmt::vformat` overloads that take
-    `text_style` (https://github.com/fmtlib/fmt/issues/993,
-    https://github.com/fmtlib/fmt/pull/994):
-
-    ```c++
-    #include <fmt/color.h>
-
-    std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
-                                      "The answer is {}.", 42);
-    ```
-
-    Thanks @Naios.
-
--   Removed the deprecated color API (`print_colored`). Use the new API,
-    namely `print` overloads that take `text_style` instead.
-
--   Made `std::unique_ptr` and `std::shared_ptr` formattable as pointers
-    via `fmt::ptr` (https://github.com/fmtlib/fmt/pull/1121):
-
-    ```c++
-    std::unique_ptr<int> p = ...;
-    fmt::print("{}", fmt::ptr(p)); // prints p as a pointer
-    ```
-
-    Thanks @sighingnow.
-
--   Made `print` and `vprint` report I/O errors
-    (https://github.com/fmtlib/fmt/issues/1098,
-    https://github.com/fmtlib/fmt/pull/1099). Thanks @BillyDonahue.
-
--   Marked deprecated APIs with the `[[deprecated]]` attribute and
-    removed internal uses of deprecated APIs
-    (https://github.com/fmtlib/fmt/pull/1022). Thanks @eliaskosunen.
-
--   Modernized the codebase using more C++11 features and removing
-    workarounds. Most importantly, `buffer_context` is now an alias
-    template, so use `buffer_context<T>` instead of
-    `buffer_context<T>::type`. These features require GCC 4.8 or later.
-
--   `formatter` specializations now always take precedence over implicit
-    conversions to `int` and the undocumented `convert_to_int` trait is
-    now deprecated.
-
--   Moved the undocumented `basic_writer`, `writer`, and `wwriter` types
-    to the `internal` namespace.
-
--   Removed deprecated `basic_format_context::begin()`. Use `out()`
-    instead.
-
--   Disallowed passing the result of `join` as an lvalue to prevent
-    misuse.
-
--   Refactored the undocumented structs that represent parsed format
-    specifiers to simplify the API and allow multibyte fill.
-
--   Moved SFINAE to template parameters to reduce symbol sizes.
-
--   Switched to `fputws` for writing wide strings so that it\'s no
-    longer required to call `_setmode` on Windows
-    (https://github.com/fmtlib/fmt/issues/1229,
-    https://github.com/fmtlib/fmt/pull/1243). Thanks @jackoalan.
-
--   Improved literal-based API
-    (https://github.com/fmtlib/fmt/pull/1254). Thanks @sylveon.
-
--   Added support for exotic platforms without `uintptr_t` such as IBM i
-    (AS/400) which has 128-bit pointers and only 64-bit integers
-    (https://github.com/fmtlib/fmt/issues/1059).
-
--   Added [Sublime Text syntax highlighting config](
-    https://github.com/fmtlib/fmt/blob/master/support/C%2B%2B.sublime-syntax)
-    (https://github.com/fmtlib/fmt/issues/1037). Thanks @Kronuz.
-
--   Added the `FMT_ENFORCE_COMPILE_STRING` macro to enforce the use of
-    compile-time format strings
-    (https://github.com/fmtlib/fmt/pull/1231). Thanks @jackoalan.
-
--   Stopped setting `CMAKE_BUILD_TYPE` if {fmt} is a subproject
-    (https://github.com/fmtlib/fmt/issues/1081).
-
--   Various build improvements
-    (https://github.com/fmtlib/fmt/pull/1039,
-    https://github.com/fmtlib/fmt/pull/1078,
-    https://github.com/fmtlib/fmt/pull/1091,
-    https://github.com/fmtlib/fmt/pull/1103,
-    https://github.com/fmtlib/fmt/pull/1177).
-    Thanks @luncliff, @jasonszang, @olafhering, @Lecetem and @pauldreik.
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/issues/1049,
-    https://github.com/fmtlib/fmt/pull/1051,
-    https://github.com/fmtlib/fmt/pull/1083,
-    https://github.com/fmtlib/fmt/pull/1113,
-    https://github.com/fmtlib/fmt/pull/1114,
-    https://github.com/fmtlib/fmt/issues/1146,
-    https://github.com/fmtlib/fmt/issues/1180,
-    https://github.com/fmtlib/fmt/pull/1250,
-    https://github.com/fmtlib/fmt/pull/1252,
-    https://github.com/fmtlib/fmt/pull/1265).
-    Thanks @mikelui, @foonathan, @BillyDonahue, @jwakely, @kaisbe and
-    @sdebionne.
-
--   Fixed ambiguous formatter specialization in `fmt/ranges.h`
-    (https://github.com/fmtlib/fmt/issues/1123).
-
--   Fixed formatting of a non-empty `std::filesystem::path` which is an
-    infinitely deep range of its components
-    (https://github.com/fmtlib/fmt/issues/1268).
-
--   Fixed handling of general output iterators when formatting
-    characters (https://github.com/fmtlib/fmt/issues/1056,
-    https://github.com/fmtlib/fmt/pull/1058). Thanks @abolz.
-
--   Fixed handling of output iterators in `formatter` specialization for
-    ranges (https://github.com/fmtlib/fmt/issues/1064).
-
--   Fixed handling of exotic character types
-    (https://github.com/fmtlib/fmt/issues/1188).
-
--   Made chrono formatting work with exceptions disabled
-    (https://github.com/fmtlib/fmt/issues/1062).
-
--   Fixed DLL visibility issues
-    (https://github.com/fmtlib/fmt/pull/1134,
-    https://github.com/fmtlib/fmt/pull/1147). Thanks @denchat.
-
--   Disabled the use of UDL template extension on GCC 9
-    (https://github.com/fmtlib/fmt/issues/1148).
-
--   Removed misplaced `format` compile-time checks from `printf`
-    (https://github.com/fmtlib/fmt/issues/1173).
-
--   Fixed issues in the experimental floating-point formatter
-    (https://github.com/fmtlib/fmt/issues/1072,
-    https://github.com/fmtlib/fmt/issues/1129,
-    https://github.com/fmtlib/fmt/issues/1153,
-    https://github.com/fmtlib/fmt/pull/1155,
-    https://github.com/fmtlib/fmt/issues/1210,
-    https://github.com/fmtlib/fmt/issues/1222). Thanks @alabuzhev.
-
--   Fixed bugs discovered by fuzzing or during fuzzing integration
-    (https://github.com/fmtlib/fmt/issues/1124,
-    https://github.com/fmtlib/fmt/issues/1127,
-    https://github.com/fmtlib/fmt/issues/1132,
-    https://github.com/fmtlib/fmt/pull/1135,
-    https://github.com/fmtlib/fmt/issues/1136,
-    https://github.com/fmtlib/fmt/issues/1141,
-    https://github.com/fmtlib/fmt/issues/1142,
-    https://github.com/fmtlib/fmt/issues/1178,
-    https://github.com/fmtlib/fmt/issues/1179,
-    https://github.com/fmtlib/fmt/issues/1194). Thanks @pauldreik.
-
--   Fixed building tests on FreeBSD and Hurd
-    (https://github.com/fmtlib/fmt/issues/1043). Thanks @jackyf.
-
--   Fixed various warnings and compilation issues
-    (https://github.com/fmtlib/fmt/pull/998,
-    https://github.com/fmtlib/fmt/pull/1006,
-    https://github.com/fmtlib/fmt/issues/1008,
-    https://github.com/fmtlib/fmt/issues/1011,
-    https://github.com/fmtlib/fmt/issues/1025,
-    https://github.com/fmtlib/fmt/pull/1027,
-    https://github.com/fmtlib/fmt/pull/1028,
-    https://github.com/fmtlib/fmt/pull/1029,
-    https://github.com/fmtlib/fmt/pull/1030,
-    https://github.com/fmtlib/fmt/pull/1031,
-    https://github.com/fmtlib/fmt/pull/1054,
-    https://github.com/fmtlib/fmt/issues/1063,
-    https://github.com/fmtlib/fmt/pull/1068,
-    https://github.com/fmtlib/fmt/pull/1074,
-    https://github.com/fmtlib/fmt/pull/1075,
-    https://github.com/fmtlib/fmt/pull/1079,
-    https://github.com/fmtlib/fmt/pull/1086,
-    https://github.com/fmtlib/fmt/issues/1088,
-    https://github.com/fmtlib/fmt/pull/1089,
-    https://github.com/fmtlib/fmt/pull/1094,
-    https://github.com/fmtlib/fmt/issues/1101,
-    https://github.com/fmtlib/fmt/pull/1102,
-    https://github.com/fmtlib/fmt/issues/1105,
-    https://github.com/fmtlib/fmt/pull/1107,
-    https://github.com/fmtlib/fmt/issues/1115,
-    https://github.com/fmtlib/fmt/issues/1117,
-    https://github.com/fmtlib/fmt/issues/1118,
-    https://github.com/fmtlib/fmt/issues/1120,
-    https://github.com/fmtlib/fmt/issues/1123,
-    https://github.com/fmtlib/fmt/pull/1139,
-    https://github.com/fmtlib/fmt/issues/1140,
-    https://github.com/fmtlib/fmt/issues/1143,
-    https://github.com/fmtlib/fmt/pull/1144,
-    https://github.com/fmtlib/fmt/pull/1150,
-    https://github.com/fmtlib/fmt/pull/1151,
-    https://github.com/fmtlib/fmt/issues/1152,
-    https://github.com/fmtlib/fmt/issues/1154,
-    https://github.com/fmtlib/fmt/issues/1156,
-    https://github.com/fmtlib/fmt/pull/1159,
-    https://github.com/fmtlib/fmt/issues/1175,
-    https://github.com/fmtlib/fmt/issues/1181,
-    https://github.com/fmtlib/fmt/issues/1186,
-    https://github.com/fmtlib/fmt/pull/1187,
-    https://github.com/fmtlib/fmt/pull/1191,
-    https://github.com/fmtlib/fmt/issues/1197,
-    https://github.com/fmtlib/fmt/issues/1200,
-    https://github.com/fmtlib/fmt/issues/1203,
-    https://github.com/fmtlib/fmt/issues/1205,
-    https://github.com/fmtlib/fmt/pull/1206,
-    https://github.com/fmtlib/fmt/issues/1213,
-    https://github.com/fmtlib/fmt/issues/1214,
-    https://github.com/fmtlib/fmt/pull/1217,
-    https://github.com/fmtlib/fmt/issues/1228,
-    https://github.com/fmtlib/fmt/pull/1230,
-    https://github.com/fmtlib/fmt/issues/1232,
-    https://github.com/fmtlib/fmt/pull/1235,
-    https://github.com/fmtlib/fmt/pull/1236,
-    https://github.com/fmtlib/fmt/issues/1240).
-    Thanks @DanielaE, @mwinterb, @eliaskosunen, @morinmorin, @ricco19,
-    @waywardmonkeys, @chronoxor, @remyabel, @pauldreik, @gsjaardema, @rcane,
-    @mocabe, @denchat, @cjdb, @HazardyKnusperkeks, @vedranmiletic, @jackoalan,
-    @DaanDeMeyer and @starkmapper.
-
-# 5.3.0 - 2018-12-28
-
--   Introduced experimental chrono formatting support:
-
-    ```c++
-    #include <fmt/chrono.h>
-
-    int main() {
-      using namespace std::literals::chrono_literals;
-      fmt::print("Default format: {} {}\n", 42s, 100ms);
-      fmt::print("strftime-like format: {:%H:%M:%S}\n", 3h + 15min + 30s);
-    }
-    ```
-
-    prints:
-
-        Default format: 42s 100ms
-        strftime-like format: 03:15:30
-
--   Added experimental support for emphasis (bold, italic, underline,
-    strikethrough), colored output to a file stream, and improved
-    colored formatting API
-    (https://github.com/fmtlib/fmt/pull/961,
-    https://github.com/fmtlib/fmt/pull/967,
-    https://github.com/fmtlib/fmt/pull/973):
-
-    ```c++
-    #include <fmt/color.h>
-
-    int main() {
-      print(fg(fmt::color::crimson) | fmt::emphasis::bold,
-            "Hello, {}!\n", "world");
-      print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) |
-            fmt::emphasis::underline, "Hello, {}!\n", "мир");
-      print(fg(fmt::color::steel_blue) | fmt::emphasis::italic,
-            "Hello, {}!\n", "世界");
-    }
-    ```
-
-    prints the following on modern terminals with RGB color support:
-
-    ![](https://user-images.githubusercontent.com/576385/50405788-b66e7500-076e-11e9-9592-7324d1f951d8.png)
-
-    Thanks @Rakete1111.
-
--   Added support for 4-bit terminal colors
-    (https://github.com/fmtlib/fmt/issues/968,
-    https://github.com/fmtlib/fmt/pull/974)
-
-    ```c++
-    #include <fmt/color.h>
-
-    int main() {
-      print(fg(fmt::terminal_color::red), "stop\n");
-    }
-    ```
-
-    Note that these colors vary by terminal:
-
-    ![](https://user-images.githubusercontent.com/576385/50405925-dbfc7e00-0770-11e9-9b85-333fab0af9ac.png)
-
-    Thanks @Rakete1111.
-
--   Parameterized formatting functions on the type of the format string
-    (https://github.com/fmtlib/fmt/issues/880,
-    https://github.com/fmtlib/fmt/pull/881,
-    https://github.com/fmtlib/fmt/pull/883,
-    https://github.com/fmtlib/fmt/pull/885,
-    https://github.com/fmtlib/fmt/pull/897,
-    https://github.com/fmtlib/fmt/issues/920). Any object of
-    type `S` that has an overloaded `to_string_view(const S&)` returning
-    `fmt::string_view` can be used as a format string:
-
-    ```c++
-    namespace my_ns {
-    inline string_view to_string_view(const my_string& s) {
-      return {s.data(), s.length()};
-    }
-    }
-
-    std::string message = fmt::format(my_string("The answer is {}."), 42);
-    ```
-
-    Thanks @DanielaE.
-
--   Made `std::string_view` work as a format string
-    (https://github.com/fmtlib/fmt/pull/898):
-
-    ```c++
-    auto message = fmt::format(std::string_view("The answer is {}."), 42);
-    ```
-
-    Thanks @DanielaE.
-
--   Added wide string support to compile-time format string checks
-    (https://github.com/fmtlib/fmt/pull/924):
-
-    ```c++
-    print(fmt(L"{:f}"), 42); // compile-time error: invalid type specifier
-    ```
-
-    Thanks @XZiar.
-
--   Made colored print functions work with wide strings
-    (https://github.com/fmtlib/fmt/pull/867):
-
-    ```c++
-    #include <fmt/color.h>
-
-    int main() {
-      print(fg(fmt::color::red), L"{}\n", 42);
-    }
-    ```
-
-    Thanks @DanielaE.
-
--   Introduced experimental Unicode support
-    (https://github.com/fmtlib/fmt/issues/628,
-    https://github.com/fmtlib/fmt/pull/891):
-
-    ```c++
-    using namespace fmt::literals;
-    auto s = fmt::format("{:*^5}"_u, "🤡"_u); // s == "**🤡**"_u
-    ```
-
--   Improved locale support:
-
-    ```c++
-    #include <fmt/locale.h>
-
-    struct numpunct : std::numpunct<char> {
-     protected:
-      char do_thousands_sep() const override { return '~'; }
-    };
-
-    std::locale loc;
-    auto s = fmt::format(std::locale(loc, new numpunct()), "{:n}", 1234567);
-    // s == "1~234~567"
-    ```
-
--   Constrained formatting functions on proper iterator types
-    (https://github.com/fmtlib/fmt/pull/921). Thanks @DanielaE.
-
--   Added `make_printf_args` and `make_wprintf_args` functions
-    (https://github.com/fmtlib/fmt/pull/934). Thanks @tnovotny.
-
--   Deprecated `fmt::visit`, `parse_context`, and `wparse_context`. Use
-    `fmt::visit_format_arg`, `format_parse_context`, and
-    `wformat_parse_context` instead.
-
--   Removed undocumented `basic_fixed_buffer` which has been superseded
-    by the iterator-based API
-    (https://github.com/fmtlib/fmt/issues/873,
-    https://github.com/fmtlib/fmt/pull/902). Thanks @superfunc.
-
--   Disallowed repeated leading zeros in an argument ID:
-
-    ```c++
-    fmt::print("{000}", 42); // error
-    ```
-
--   Reintroduced support for gcc 4.4.
-
--   Fixed compilation on platforms with exotic `double`
-    (https://github.com/fmtlib/fmt/issues/878).
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/issues/164,
-    https://github.com/fmtlib/fmt/issues/877,
-    https://github.com/fmtlib/fmt/pull/901,
-    https://github.com/fmtlib/fmt/pull/906,
-    https://github.com/fmtlib/fmt/pull/979).
-    Thanks @kookjr, @DarkDimius and @HecticSerenity.
-
--   Added pkgconfig support which makes it easier to consume the library
-    from meson and other build systems
-    (https://github.com/fmtlib/fmt/pull/916). Thanks @colemickens.
-
--   Various build improvements
-    (https://github.com/fmtlib/fmt/pull/909,
-    https://github.com/fmtlib/fmt/pull/926,
-    https://github.com/fmtlib/fmt/pull/937,
-    https://github.com/fmtlib/fmt/pull/953,
-    https://github.com/fmtlib/fmt/pull/959).
-    Thanks @tchaikov, @luncliff, @AndreasSchoenle, @hotwatermorning and @Zefz.
-
--   Improved `string_view` construction performance
-    (https://github.com/fmtlib/fmt/pull/914). Thanks @gabime.
-
--   Fixed non-matching char types
-    (https://github.com/fmtlib/fmt/pull/895). Thanks @DanielaE.
-
--   Fixed `format_to_n` with `std::back_insert_iterator`
-    (https://github.com/fmtlib/fmt/pull/913). Thanks @DanielaE.
-
--   Fixed locale-dependent formatting
-    (https://github.com/fmtlib/fmt/issues/905).
-
--   Fixed various compiler warnings and errors
-    (https://github.com/fmtlib/fmt/pull/882,
-    https://github.com/fmtlib/fmt/pull/886,
-    https://github.com/fmtlib/fmt/pull/933,
-    https://github.com/fmtlib/fmt/pull/941,
-    https://github.com/fmtlib/fmt/issues/931,
-    https://github.com/fmtlib/fmt/pull/943,
-    https://github.com/fmtlib/fmt/pull/954,
-    https://github.com/fmtlib/fmt/pull/956,
-    https://github.com/fmtlib/fmt/pull/962,
-    https://github.com/fmtlib/fmt/issues/965,
-    https://github.com/fmtlib/fmt/issues/977,
-    https://github.com/fmtlib/fmt/pull/983,
-    https://github.com/fmtlib/fmt/pull/989).
-    Thanks @Luthaf, @stevenhoving, @christinaa, @lgritz, @DanielaE,
-    @0x8000-0000 and @liuping1997.
-
-# 5.2.1 - 2018-09-21
-
--   Fixed `visit` lookup issues on gcc 7 & 8
-    (https://github.com/fmtlib/fmt/pull/870). Thanks @medithe.
--   Fixed linkage errors on older gcc.
--   Prevented `fmt/range.h` from specializing `fmt::basic_string_view`
-    (https://github.com/fmtlib/fmt/issues/865,
-    https://github.com/fmtlib/fmt/pull/868). Thanks @hhggit.
--   Improved error message when formatting unknown types
-    (https://github.com/fmtlib/fmt/pull/872). Thanks @foonathan.
--   Disabled templated user-defined literals when compiled under nvcc
-    (https://github.com/fmtlib/fmt/pull/875). Thanks @CandyGumdrop.
--   Fixed `format_to` formatting to `wmemory_buffer`
-    (https://github.com/fmtlib/fmt/issues/874).
-
-# 5.2.0 - 2018-09-13
-
--   Optimized format string parsing and argument processing which
-    resulted in up to 5x speed up on long format strings and significant
-    performance boost on various benchmarks. For example, version 5.2 is
-    2.22x faster than 5.1 on decimal integer formatting with `format_to`
-    (macOS, clang-902.0.39.2):
-
-    | Method                     | Time, s         | Speedup |
-    | -------------------------- | --------------: | ------: |
-    | fmt::format 5.1            | 0.58            |         |
-    | fmt::format 5.2            | 0.35            |   1.66x |
-    | fmt::format_to 5.1         | 0.51            |         |
-    | fmt::format_to 5.2         | 0.23            |   2.22x |
-    | sprintf                    | 0.71            |         |
-    | std::to_string             | 1.01            |         |
-    | std::stringstream          | 1.73            |         |
-
--   Changed the `fmt` macro from opt-out to opt-in to prevent name
-    collisions. To enable it define the `FMT_STRING_ALIAS` macro to 1
-    before including `fmt/format.h`:
-
-    ```c++
-    #define FMT_STRING_ALIAS 1
-    #include <fmt/format.h>
-    std::string answer = format(fmt("{}"), 42);
-    ```
-
--   Added compile-time format string checks to `format_to` overload that
-    takes `fmt::memory_buffer`
-    (https://github.com/fmtlib/fmt/issues/783):
-
-    ```c++
-    fmt::memory_buffer buf;
-    // Compile-time error: invalid type specifier.
-    fmt::format_to(buf, fmt("{:d}"), "foo");
-    ```
-
--   Moved experimental color support to `fmt/color.h` and enabled the
-    new API by default. The old API can be enabled by defining the
-    `FMT_DEPRECATED_COLORS` macro.
-
--   Added formatting support for types explicitly convertible to
-    `fmt::string_view`:
-
-    ```c++
-    struct foo {
-      explicit operator fmt::string_view() const { return "foo"; }
-    };
-    auto s = format("{}", foo());
-    ```
-
-    In particular, this makes formatting function work with
-    `folly::StringPiece`.
-
--   Implemented preliminary support for `char*_t` by replacing the
-    `format` function overloads with a single function template
-    parameterized on the string type.
-
--   Added support for dynamic argument lists
-    (https://github.com/fmtlib/fmt/issues/814,
-    https://github.com/fmtlib/fmt/pull/819). Thanks @MikePopoloski.
-
--   Reduced executable size overhead for embedded targets using newlib
-    nano by making locale dependency optional
-    (https://github.com/fmtlib/fmt/pull/839). Thanks @teajay-fr.
-
--   Keep `noexcept` specifier when exceptions are disabled
-    (https://github.com/fmtlib/fmt/issues/801,
-    https://github.com/fmtlib/fmt/pull/810). Thanks @qis.
-
--   Fixed formatting of user-defined types providing `operator<<` with
-    `format_to_n` (https://github.com/fmtlib/fmt/pull/806).
-    Thanks @mkurdej.
-
--   Fixed dynamic linkage of new symbols
-    (https://github.com/fmtlib/fmt/issues/808).
-
--   Fixed global initialization issue
-    (https://github.com/fmtlib/fmt/issues/807):
-
-    ```c++
-    // This works on compilers with constexpr support.
-    static const std::string answer = fmt::format("{}", 42);
-    ```
-
--   Fixed various compiler warnings and errors
-    (https://github.com/fmtlib/fmt/pull/804,
-    https://github.com/fmtlib/fmt/issues/809,
-    https://github.com/fmtlib/fmt/pull/811,
-    https://github.com/fmtlib/fmt/issues/822,
-    https://github.com/fmtlib/fmt/pull/827,
-    https://github.com/fmtlib/fmt/issues/830,
-    https://github.com/fmtlib/fmt/pull/838,
-    https://github.com/fmtlib/fmt/issues/843,
-    https://github.com/fmtlib/fmt/pull/844,
-    https://github.com/fmtlib/fmt/issues/851,
-    https://github.com/fmtlib/fmt/pull/852,
-    https://github.com/fmtlib/fmt/pull/854).
-    Thanks @henryiii, @medithe, and @eliasdaler.
-
-# 5.1.0 - 2018-07-05
-
--   Added experimental support for RGB color output enabled with the
-    `FMT_EXTENDED_COLORS` macro:
-
-    ```c++
-    #define FMT_EXTENDED_COLORS
-    #define FMT_HEADER_ONLY // or compile fmt with FMT_EXTENDED_COLORS defined
-    #include <fmt/format.h>
-
-    fmt::print(fmt::color::steel_blue, "Some beautiful text");
-    ```
-
-    The old API (the `print_colored` and `vprint_colored` functions and
-    the `color` enum) is now deprecated.
-    (https://github.com/fmtlib/fmt/issues/762
-    https://github.com/fmtlib/fmt/pull/767). thanks @Remotion.
-
--   Added quotes to strings in ranges and tuples
-    (https://github.com/fmtlib/fmt/pull/766). Thanks @Remotion.
-
--   Made `format_to` work with `basic_memory_buffer`
-    (https://github.com/fmtlib/fmt/issues/776).
-
--   Added `vformat_to_n` and `wchar_t` overload of `format_to_n`
-    (https://github.com/fmtlib/fmt/issues/764,
-    https://github.com/fmtlib/fmt/issues/769).
-
--   Made `is_range` and `is_tuple_like` part of public (experimental)
-    API to allow specialization for user-defined types
-    (https://github.com/fmtlib/fmt/issues/751,
-    https://github.com/fmtlib/fmt/pull/759). Thanks @drrlvn.
-
--   Added more compilers to continuous integration and increased
-    `FMT_PEDANTIC` warning levels
-    (https://github.com/fmtlib/fmt/pull/736). Thanks @eliaskosunen.
-
--   Fixed compilation with MSVC 2013.
-
--   Fixed handling of user-defined types in `format_to`
-    (https://github.com/fmtlib/fmt/issues/793).
-
--   Forced linking of inline `vformat` functions into the library
-    (https://github.com/fmtlib/fmt/issues/795).
-
--   Fixed incorrect call to on_align in `'{:}='`
-    (https://github.com/fmtlib/fmt/issues/750).
-
--   Fixed floating-point formatting to a non-back_insert_iterator with
-    sign & numeric alignment specified
-    (https://github.com/fmtlib/fmt/issues/756).
-
--   Fixed formatting to an array with `format_to_n`
-    (https://github.com/fmtlib/fmt/issues/778).
-
--   Fixed formatting of more than 15 named arguments
-    (https://github.com/fmtlib/fmt/issues/754).
-
--   Fixed handling of compile-time strings when including
-    `fmt/ostream.h`. (https://github.com/fmtlib/fmt/issues/768).
-
--   Fixed various compiler warnings and errors
-    (https://github.com/fmtlib/fmt/issues/742,
-    https://github.com/fmtlib/fmt/issues/748,
-    https://github.com/fmtlib/fmt/issues/752,
-    https://github.com/fmtlib/fmt/issues/770,
-    https://github.com/fmtlib/fmt/pull/775,
-    https://github.com/fmtlib/fmt/issues/779,
-    https://github.com/fmtlib/fmt/pull/780,
-    https://github.com/fmtlib/fmt/pull/790,
-    https://github.com/fmtlib/fmt/pull/792,
-    https://github.com/fmtlib/fmt/pull/800).
-    Thanks @Remotion, @gabime, @foonathan, @Dark-Passenger and @0x8000-0000.
-
-# 5.0.0 - 2018-05-21
-
--   Added a requirement for partial C++11 support, most importantly
-    variadic templates and type traits, and dropped `FMT_VARIADIC_*`
-    emulation macros. Variadic templates are available since GCC 4.4,
-    Clang 2.9 and MSVC 18.0 (2013). For older compilers use {fmt}
-    [version 4.x](https://github.com/fmtlib/fmt/releases/tag/4.1.0)
-    which continues to be maintained and works with C++98 compilers.
-
--   Renamed symbols to follow standard C++ naming conventions and
-    proposed a subset of the library for standardization in [P0645R2
-    Text Formatting](https://wg21.link/P0645).
-
--   Implemented `constexpr` parsing of format strings and [compile-time
-    format string
-    checks](https://fmt.dev/latest/api.html#compile-time-format-string-checks).
-    For example
-
-    ```c++
-    #include <fmt/format.h>
-
-    std::string s = format(fmt("{:d}"), "foo");
-    ```
-
-    gives a compile-time error because `d` is an invalid specifier for
-    strings ([godbolt](https://godbolt.org/g/rnCy9Q)):
-
-        ...
-        <source>:4:19: note: in instantiation of function template specialization 'fmt::v5::format<S, char [4]>' requested here
-          std::string s = format(fmt("{:d}"), "foo");
-                          ^
-        format.h:1337:13: note: non-constexpr function 'on_error' cannot be used in a constant expression
-            handler.on_error("invalid type specifier");
-
-    Compile-time checks require relaxed `constexpr` (C++14 feature)
-    support. If the latter is not available, checks will be performed at
-    runtime.
-
--   Separated format string parsing and formatting in the extension API
-    to enable compile-time format string processing. For example
-
-    ```c++
-    struct Answer {};
-
-    namespace fmt {
-    template <>
-    struct formatter<Answer> {
-      constexpr auto parse(parse_context& ctx) {
-        auto it = ctx.begin();
-        spec = *it;
-        if (spec != 'd' && spec != 's')
-          throw format_error("invalid specifier");
-        return ++it;
-      }
-
-      template <typename FormatContext>
-      auto format(Answer, FormatContext& ctx) {
-        return spec == 's' ?
-          format_to(ctx.begin(), "{}", "fourty-two") :
-          format_to(ctx.begin(), "{}", 42);
-      }
-
-      char spec = 0;
-    };
-    }
-
-    std::string s = format(fmt("{:x}"), Answer());
-    ```
-
-    gives a compile-time error due to invalid format specifier
-    ([godbolt](https://godbolt.org/g/2jQ1Dv)):
-
-        ...
-        <source>:12:45: error: expression '<throw-expression>' is not a constant expression
-               throw format_error("invalid specifier");
-
--   Added [iterator
-    support](https://fmt.dev/latest/api.html#output-iterator-support):
-
-    ```c++
-    #include <vector>
-    #include <fmt/format.h>
-
-    std::vector<char> out;
-    fmt::format_to(std::back_inserter(out), "{}", 42);
-    ```
-
--   Added the
-    [format_to_n](https://fmt.dev/latest/api.html#_CPPv2N3fmt11format_to_nE8OutputItNSt6size_tE11string_viewDpRK4Args)
-    function that restricts the output to the specified number of
-    characters (https://github.com/fmtlib/fmt/issues/298):
-
-    ```c++
-    char out[4];
-    fmt::format_to_n(out, sizeof(out), "{}", 12345);
-    // out == "1234" (without terminating '\0')
-    ```
-
--   Added the [formatted_size](
-    https://fmt.dev/latest/api.html#_CPPv2N3fmt14formatted_sizeE11string_viewDpRK4Args)
-    function for computing the output size:
-
-    ```c++
-    #include <fmt/format.h>
-
-    auto size = fmt::formatted_size("{}", 12345); // size == 5
-    ```
-
--   Improved compile times by reducing dependencies on standard headers
-    and providing a lightweight [core
-    API](https://fmt.dev/latest/api.html#core-api):
-
-    ```c++
-    #include <fmt/core.h>
-
-    fmt::print("The answer is {}.", 42);
-    ```
-
-    See [Compile time and code
-    bloat](https://github.com/fmtlib/fmt#compile-time-and-code-bloat).
-
--   Added the [make_format_args](
-    https://fmt.dev/latest/api.html#_CPPv2N3fmt16make_format_argsEDpRK4Args)
-    function for capturing formatting arguments:
-
-    ```c++
-    // Prints formatted error message.
-    void vreport_error(const char *format, fmt::format_args args) {
-      fmt::print("Error: ");
-      fmt::vprint(format, args);
-    }
-    template <typename... Args>
-    void report_error(const char *format, const Args & ... args) {
-      vreport_error(format, fmt::make_format_args(args...));
-    }
-    ```
-
--   Added the `make_printf_args` function for capturing `printf`
-    arguments (https://github.com/fmtlib/fmt/issues/687,
-    https://github.com/fmtlib/fmt/pull/694). Thanks @Kronuz.
-
--   Added prefix `v` to non-variadic functions taking `format_args` to
-    distinguish them from variadic ones:
-
-    ```c++
-    std::string vformat(string_view format_str, format_args args);
-
-    template <typename... Args>
-    std::string format(string_view format_str, const Args & ... args);
-    ```
-
--   Added experimental support for formatting ranges, containers and
-    tuple-like types in `fmt/ranges.h`
-    (https://github.com/fmtlib/fmt/pull/735):
-
-    ```c++
-    #include <fmt/ranges.h>
-
-    std::vector<int> v = {1, 2, 3};
-    fmt::print("{}", v); // prints {1, 2, 3}
-    ```
-
-    Thanks @Remotion.
-
--   Implemented `wchar_t` date and time formatting
-    (https://github.com/fmtlib/fmt/pull/712):
-
-    ```c++
-    #include <fmt/time.h>
-
-    std::time_t t = std::time(nullptr);
-    auto s = fmt::format(L"The date is {:%Y-%m-%d}.", *std::localtime(&t));
-    ```
-
-    Thanks @DanielaE.
-
--   Provided more wide string overloads
-    (https://github.com/fmtlib/fmt/pull/724). Thanks @DanielaE.
-
--   Switched from a custom null-terminated string view class to
-    `string_view` in the format API and provided `fmt::string_view`
-    which implements a subset of `std::string_view` API for pre-C++17
-    systems.
-
--   Added support for `std::experimental::string_view`
-    (https://github.com/fmtlib/fmt/pull/607):
-
-    ```c++
-    #include <fmt/core.h>
-    #include <experimental/string_view>
-
-    fmt::print("{}", std::experimental::string_view("foo"));
-    ```
-
-    Thanks @virgiliofornazin.
-
--   Allowed mixing named and automatic arguments:
-
-    ```c++
-    fmt::format("{} {two}", 1, fmt::arg("two", 2));
-    ```
-
--   Removed the write API in favor of the [format
-    API](https://fmt.dev/latest/api.html#format-api) with compile-time
-    handling of format strings.
-
--   Disallowed formatting of multibyte strings into a wide character
-    target (https://github.com/fmtlib/fmt/pull/606).
-
--   Improved documentation
-    (https://github.com/fmtlib/fmt/pull/515,
-    https://github.com/fmtlib/fmt/issues/614,
-    https://github.com/fmtlib/fmt/pull/617,
-    https://github.com/fmtlib/fmt/pull/661,
-    https://github.com/fmtlib/fmt/pull/680).
-    Thanks @ibell, @mihaitodor and @johnthagen.
-
--   Implemented more efficient handling of large number of format
-    arguments.
-
--   Introduced an inline namespace for symbol versioning.
-
--   Added debug postfix `d` to the `fmt` library name
-    (https://github.com/fmtlib/fmt/issues/636).
-
--   Removed unnecessary `fmt/` prefix in includes
-    (https://github.com/fmtlib/fmt/pull/397). Thanks @chronoxor.
-
--   Moved `fmt/*.h` to `include/fmt/*.h` to prevent irrelevant files and
-    directories appearing on the include search paths when fmt is used
-    as a subproject and moved source files to the `src` directory.
-
--   Added qmake project file `support/fmt.pro`
-    (https://github.com/fmtlib/fmt/pull/641). Thanks @cowo78.
-
--   Added Gradle build file `support/build.gradle`
-    (https://github.com/fmtlib/fmt/pull/649). Thanks @luncliff.
-
--   Removed `FMT_CPPFORMAT` CMake option.
-
--   Fixed a name conflict with the macro `CHAR_WIDTH` in glibc
-    (https://github.com/fmtlib/fmt/pull/616). Thanks @aroig.
-
--   Fixed handling of nested braces in `fmt::join`
-    (https://github.com/fmtlib/fmt/issues/638).
-
--   Added `SOURCELINK_SUFFIX` for compatibility with Sphinx 1.5
-    (https://github.com/fmtlib/fmt/pull/497). Thanks @ginggs.
-
--   Added a missing `inline` in the header-only mode
-    (https://github.com/fmtlib/fmt/pull/626). Thanks @aroig.
-
--   Fixed various compiler warnings
-    (https://github.com/fmtlib/fmt/pull/640,
-    https://github.com/fmtlib/fmt/pull/656,
-    https://github.com/fmtlib/fmt/pull/679,
-    https://github.com/fmtlib/fmt/pull/681,
-    https://github.com/fmtlib/fmt/pull/705,
-    https://github.com/fmtlib/fmt/issues/715,
-    https://github.com/fmtlib/fmt/pull/717,
-    https://github.com/fmtlib/fmt/pull/720,
-    https://github.com/fmtlib/fmt/pull/723,
-    https://github.com/fmtlib/fmt/pull/726,
-    https://github.com/fmtlib/fmt/pull/730,
-    https://github.com/fmtlib/fmt/pull/739).
-    Thanks @peterbell10, @LarsGullik, @foonathan, @eliaskosunen,
-    @christianparpart, @DanielaE and @mwinterb.
-
--   Worked around an MSVC bug and fixed several warnings
-    (https://github.com/fmtlib/fmt/pull/653). Thanks @alabuzhev.
-
--   Worked around GCC bug 67371
-    (https://github.com/fmtlib/fmt/issues/682).
-
--   Fixed compilation with `-fno-exceptions`
-    (https://github.com/fmtlib/fmt/pull/655). Thanks @chenxiaolong.
-
--   Made `constexpr remove_prefix` gcc version check tighter
-    (https://github.com/fmtlib/fmt/issues/648).
-
--   Renamed internal type enum constants to prevent collision with
-    poorly written C libraries
-    (https://github.com/fmtlib/fmt/issues/644).
-
--   Added detection of `wostream operator<<`
-    (https://github.com/fmtlib/fmt/issues/650).
-
--   Fixed compilation on OpenBSD
-    (https://github.com/fmtlib/fmt/pull/660). Thanks @hubslave.
-
--   Fixed compilation on FreeBSD 12
-    (https://github.com/fmtlib/fmt/pull/732). Thanks @dankm.
-
--   Fixed compilation when there is a mismatch between `-std` options
-    between the library and user code
-    (https://github.com/fmtlib/fmt/issues/664).
-
--   Fixed compilation with GCC 7 and `-std=c++11`
-    (https://github.com/fmtlib/fmt/issues/734).
-
--   Improved generated binary code on GCC 7 and older
-    (https://github.com/fmtlib/fmt/issues/668).
-
--   Fixed handling of numeric alignment with no width
-    (https://github.com/fmtlib/fmt/issues/675).
-
--   Fixed handling of empty strings in UTF8/16 converters
-    (https://github.com/fmtlib/fmt/pull/676). Thanks @vgalka-sl.
-
--   Fixed formatting of an empty `string_view`
-    (https://github.com/fmtlib/fmt/issues/689).
-
--   Fixed detection of `string_view` on libc++
-    (https://github.com/fmtlib/fmt/issues/686).
-
--   Fixed DLL issues (https://github.com/fmtlib/fmt/pull/696).
-    Thanks @sebkoenig.
-
--   Fixed compile checks for mixing narrow and wide strings
-    (https://github.com/fmtlib/fmt/issues/690).
-
--   Disabled unsafe implicit conversion to `std::string`
-    (https://github.com/fmtlib/fmt/issues/729).
-
--   Fixed handling of reused format specs (as in `fmt::join`) for
-    pointers (https://github.com/fmtlib/fmt/pull/725). Thanks @mwinterb.
-
--   Fixed installation of `fmt/ranges.h`
-    (https://github.com/fmtlib/fmt/pull/738). Thanks @sv1990.
-
-# 4.1.0 - 2017-12-20
-
--   Added `fmt::to_wstring()` in addition to `fmt::to_string()`
-    (https://github.com/fmtlib/fmt/pull/559). Thanks @alabuzhev.
--   Added support for C++17 `std::string_view`
-    (https://github.com/fmtlib/fmt/pull/571 and
-    https://github.com/fmtlib/fmt/pull/578).
-    Thanks @thelostt and @mwinterb.
--   Enabled stream exceptions to catch errors
-    (https://github.com/fmtlib/fmt/issues/581). Thanks @crusader-mike.
--   Allowed formatting of class hierarchies with `fmt::format_arg()`
-    (https://github.com/fmtlib/fmt/pull/547). Thanks @rollbear.
--   Removed limitations on character types
-    (https://github.com/fmtlib/fmt/pull/563). Thanks @Yelnats321.
--   Conditionally enabled use of `std::allocator_traits`
-    (https://github.com/fmtlib/fmt/pull/583). Thanks @mwinterb.
--   Added support for `const` variadic member function emulation with
-    `FMT_VARIADIC_CONST`
-    (https://github.com/fmtlib/fmt/pull/591). Thanks @ludekvodicka.
--   Various bugfixes: bad overflow check, unsupported implicit type
-    conversion when determining formatting function, test segfaults
-    (https://github.com/fmtlib/fmt/issues/551), ill-formed
-    macros (https://github.com/fmtlib/fmt/pull/542) and
-    ambiguous overloads
-    (https://github.com/fmtlib/fmt/issues/580). Thanks @xylosper.
--   Prevented warnings on MSVC
-    (https://github.com/fmtlib/fmt/pull/605,
-    https://github.com/fmtlib/fmt/pull/602, and
-    https://github.com/fmtlib/fmt/pull/545), clang
-    (https://github.com/fmtlib/fmt/pull/582), GCC
-    (https://github.com/fmtlib/fmt/issues/573), various
-    conversion warnings (https://github.com/fmtlib/fmt/pull/609,
-    https://github.com/fmtlib/fmt/pull/567,
-    https://github.com/fmtlib/fmt/pull/553 and
-    https://github.com/fmtlib/fmt/pull/553), and added
-    `override` and `[[noreturn]]`
-    (https://github.com/fmtlib/fmt/pull/549 and
-    https://github.com/fmtlib/fmt/issues/555).
-    Thanks @alabuzhev, @virgiliofornazin, @alexanderbock, @yumetodo, @VaderY,
-    @jpcima, @thelostt and @Manu343726.
--   Improved CMake: Used `GNUInstallDirs` to set installation location
-    (https://github.com/fmtlib/fmt/pull/610) and fixed warnings
-    (https://github.com/fmtlib/fmt/pull/536 and
-    https://github.com/fmtlib/fmt/pull/556).
-    Thanks @mikecrowe, @evgen231 and @henryiii.
-
-# 4.0.0 - 2017-06-27
-
--   Removed old compatibility headers `cppformat/*.h` and CMake options
-    (https://github.com/fmtlib/fmt/pull/527). Thanks @maddinat0r.
-
--   Added `string.h` containing `fmt::to_string()` as alternative to
-    `std::to_string()` as well as other string writer functionality
-    (https://github.com/fmtlib/fmt/issues/326 and
-    https://github.com/fmtlib/fmt/pull/441):
-
-    ```c++
-    #include "fmt/string.h"
-
-    std::string answer = fmt::to_string(42);
-    ```
-
-    Thanks @glebov-andrey.
-
--   Moved `fmt::printf()` to new `printf.h` header and allowed `%s` as
-    generic specifier (https://github.com/fmtlib/fmt/pull/453),
-    made `%.f` more conformant to regular `printf()`
-    (https://github.com/fmtlib/fmt/pull/490), added custom
-    writer support (https://github.com/fmtlib/fmt/issues/476)
-    and implemented missing custom argument formatting
-    (https://github.com/fmtlib/fmt/pull/339 and
-    https://github.com/fmtlib/fmt/pull/340):
-
-    ```c++
-    #include "fmt/printf.h"
-
-    // %s format specifier can be used with any argument type.
-    fmt::printf("%s", 42);
-    ```
-
-    Thanks @mojoBrendan, @manylegged and @spacemoose.
-    See also https://github.com/fmtlib/fmt/issues/360,
-    https://github.com/fmtlib/fmt/issues/335 and
-    https://github.com/fmtlib/fmt/issues/331.
-
--   Added `container.h` containing a `BasicContainerWriter` to write to
-    containers like `std::vector`
-    (https://github.com/fmtlib/fmt/pull/450). Thanks @polyvertex.
-
--   Added `fmt::join()` function that takes a range and formats its
-    elements separated by a given string
-    (https://github.com/fmtlib/fmt/pull/466):
-
-    ```c++
-    #include "fmt/format.h"
-
-    std::vector<double> v = {1.2, 3.4, 5.6};
-    // Prints "(+01.20, +03.40, +05.60)".
-    fmt::print("({:+06.2f})", fmt::join(v.begin(), v.end(), ", "));
-    ```
-
-    Thanks @olivier80.
-
--   Added support for custom formatting specifications to simplify
-    customization of built-in formatting
-    (https://github.com/fmtlib/fmt/pull/444). Thanks @polyvertex.
-    See also https://github.com/fmtlib/fmt/issues/439.
-
--   Added `fmt::format_system_error()` for error code formatting
-    (https://github.com/fmtlib/fmt/issues/323 and
-    https://github.com/fmtlib/fmt/pull/526). Thanks @maddinat0r.
-
--   Added thread-safe `fmt::localtime()` and `fmt::gmtime()` as
-    replacement for the standard version to `time.h`
-    (https://github.com/fmtlib/fmt/pull/396). Thanks @codicodi.
-
--   Internal improvements to `NamedArg` and `ArgLists`
-    (https://github.com/fmtlib/fmt/pull/389 and
-    https://github.com/fmtlib/fmt/pull/390). Thanks @chronoxor.
-
--   Fixed crash due to bug in `FormatBuf`
-    (https://github.com/fmtlib/fmt/pull/493). Thanks @effzeh. See also
-    https://github.com/fmtlib/fmt/issues/480 and
-    https://github.com/fmtlib/fmt/issues/491.
-
--   Fixed handling of wide strings in `fmt::StringWriter`.
-
--   Improved compiler error messages
-    (https://github.com/fmtlib/fmt/issues/357).
-
--   Fixed various warnings and issues with various compilers
-    (https://github.com/fmtlib/fmt/pull/494,
-    https://github.com/fmtlib/fmt/pull/499,
-    https://github.com/fmtlib/fmt/pull/483,
-    https://github.com/fmtlib/fmt/pull/485,
-    https://github.com/fmtlib/fmt/pull/482,
-    https://github.com/fmtlib/fmt/pull/475,
-    https://github.com/fmtlib/fmt/pull/473 and
-    https://github.com/fmtlib/fmt/pull/414).
-    Thanks @chronoxor, @zhaohuaxishi, @pkestene, @dschmidt and @0x414c.
-
--   Improved CMake: targets are now namespaced
-    (https://github.com/fmtlib/fmt/pull/511 and
-    https://github.com/fmtlib/fmt/pull/513), supported
-    header-only `printf.h`
-    (https://github.com/fmtlib/fmt/pull/354), fixed issue with
-    minimal supported library subset
-    (https://github.com/fmtlib/fmt/issues/418,
-    https://github.com/fmtlib/fmt/pull/419 and
-    https://github.com/fmtlib/fmt/pull/420).
-    Thanks @bjoernthiel, @niosHD, @LogicalKnight and @alabuzhev.
-
--   Improved documentation (https://github.com/fmtlib/fmt/pull/393).
-    Thanks @pwm1234.
-
-# 3.0.2 - 2017-06-14
-
--   Added `FMT_VERSION` macro
-    (https://github.com/fmtlib/fmt/issues/411).
--   Used `FMT_NULL` instead of literal `0`
-    (https://github.com/fmtlib/fmt/pull/409). Thanks @alabuzhev.
--   Added extern templates for `format_float`
-    (https://github.com/fmtlib/fmt/issues/413).
--   Fixed implicit conversion issue
-    (https://github.com/fmtlib/fmt/issues/507).
--   Fixed signbit detection
-    (https://github.com/fmtlib/fmt/issues/423).
--   Fixed naming collision
-    (https://github.com/fmtlib/fmt/issues/425).
--   Fixed missing intrinsic for C++/CLI
-    (https://github.com/fmtlib/fmt/pull/457). Thanks @calumr.
--   Fixed Android detection
-    (https://github.com/fmtlib/fmt/pull/458). Thanks @Gachapen.
--   Use lean `windows.h` if not in header-only mode
-    (https://github.com/fmtlib/fmt/pull/503). Thanks @Quentin01.
--   Fixed issue with CMake exporting C++11 flag
-    (https://github.com/fmtlib/fmt/pull/455). Thanks @EricWF.
--   Fixed issue with nvcc and MSVC compiler bug and MinGW
-    (https://github.com/fmtlib/fmt/issues/505).
--   Fixed DLL issues (https://github.com/fmtlib/fmt/pull/469 and
-    https://github.com/fmtlib/fmt/pull/502).
-    Thanks @richardeakin and @AndreasSchoenle.
--   Fixed test compilation under FreeBSD
-    (https://github.com/fmtlib/fmt/issues/433).
--   Fixed various warnings
-    (https://github.com/fmtlib/fmt/pull/403,
-    https://github.com/fmtlib/fmt/pull/410 and
-    https://github.com/fmtlib/fmt/pull/510).
-    Thanks @Lecetem, @chenhayat and @trozen.
--   Worked around a broken `__builtin_clz` in clang with MS codegen
-    (https://github.com/fmtlib/fmt/issues/519).
--   Removed redundant include
-    (https://github.com/fmtlib/fmt/issues/479).
--   Fixed documentation issues.
-
-# 3.0.1 - 2016-11-01
-
--   Fixed handling of thousands separator
-    (https://github.com/fmtlib/fmt/issues/353).
--   Fixed handling of `unsigned char` strings
-    (https://github.com/fmtlib/fmt/issues/373).
--   Corrected buffer growth when formatting time
-    (https://github.com/fmtlib/fmt/issues/367).
--   Removed warnings under MSVC and clang
-    (https://github.com/fmtlib/fmt/issues/318,
-    https://github.com/fmtlib/fmt/issues/250, also merged
-    https://github.com/fmtlib/fmt/pull/385 and
-    https://github.com/fmtlib/fmt/pull/361).
-    Thanks @jcelerier and @nmoehrle.
--   Fixed compilation issues under Android
-    (https://github.com/fmtlib/fmt/pull/327,
-    https://github.com/fmtlib/fmt/issues/345 and
-    https://github.com/fmtlib/fmt/pull/381), FreeBSD
-    (https://github.com/fmtlib/fmt/pull/358), Cygwin
-    (https://github.com/fmtlib/fmt/issues/388), MinGW
-    (https://github.com/fmtlib/fmt/issues/355) as well as other
-    issues (https://github.com/fmtlib/fmt/issues/350,
-    https://github.com/fmtlib/fmt/issues/355,
-    https://github.com/fmtlib/fmt/pull/348,
-    https://github.com/fmtlib/fmt/pull/402,
-    https://github.com/fmtlib/fmt/pull/405).
-    Thanks @dpantele, @hghwng, @arvedarved, @LogicalKnight and @JanHellwig.
--   Fixed some documentation issues and extended specification
-    (https://github.com/fmtlib/fmt/issues/320,
-    https://github.com/fmtlib/fmt/pull/333,
-    https://github.com/fmtlib/fmt/issues/347,
-    https://github.com/fmtlib/fmt/pull/362). Thanks @smellman.
-
-# 3.0.0 - 2016-05-07
-
--   The project has been renamed from C++ Format (cppformat) to fmt for
-    consistency with the used namespace and macro prefix
-    (https://github.com/fmtlib/fmt/issues/307). Library headers
-    are now located in the `fmt` directory:
-
-    ```c++
-    #include "fmt/format.h"
-    ```
-
-    Including `format.h` from the `cppformat` directory is deprecated
-    but works via a proxy header which will be removed in the next major
-    version.
-
-    The documentation is now available at <https://fmt.dev>.
-
--   Added support for
-    [strftime](http://en.cppreference.com/w/cpp/chrono/c/strftime)-like
-    [date and time
-    formatting](https://fmt.dev/3.0.0/api.html#date-and-time-formatting)
-    (https://github.com/fmtlib/fmt/issues/283):
-
-    ```c++
-    #include "fmt/time.h"
-
-    std::time_t t = std::time(nullptr);
-    // Prints "The date is 2016-04-29." (with the current date)
-    fmt::print("The date is {:%Y-%m-%d}.", *std::localtime(&t));
-    ```
-
--   `std::ostream` support including formatting of user-defined types
-    that provide overloaded `operator<<` has been moved to
-    `fmt/ostream.h`:
-
-    ```c++
-    #include "fmt/ostream.h"
-
-    class Date {
-      int year_, month_, day_;
-    public:
-      Date(int year, int month, int day) : year_(year), month_(month), day_(day) {}
-
-      friend std::ostream &operator<<(std::ostream &os, const Date &d) {
-        return os << d.year_ << '-' << d.month_ << '-' << d.day_;
-      }
-    };
-
-    std::string s = fmt::format("The date is {}", Date(2012, 12, 9));
-    // s == "The date is 2012-12-9"
-    ```
-
--   Added support for [custom argument
-    formatters](https://fmt.dev/3.0.0/api.html#argument-formatters)
-    (https://github.com/fmtlib/fmt/issues/235).
-
--   Added support for locale-specific integer formatting with the `n`
-    specifier (https://github.com/fmtlib/fmt/issues/305):
-
-    ```c++
-    std::setlocale(LC_ALL, "en_US.utf8");
-    fmt::print("cppformat: {:n}\n", 1234567); // prints 1,234,567
-    ```
-
--   Sign is now preserved when formatting an integer with an incorrect
-    `printf` format specifier
-    (https://github.com/fmtlib/fmt/issues/265):
-
-    ```c++
-    fmt::printf("%lld", -42); // prints -42
-    ```
-
-    Note that it would be an undefined behavior in `std::printf`.
-
--   Length modifiers such as `ll` are now optional in printf formatting
-    functions and the correct type is determined automatically
-    (https://github.com/fmtlib/fmt/issues/255):
-
-    ```c++
-    fmt::printf("%d", std::numeric_limits<long long>::max());
-    ```
-
-    Note that it would be an undefined behavior in `std::printf`.
-
--   Added initial support for custom formatters
-    (https://github.com/fmtlib/fmt/issues/231).
-
--   Fixed detection of user-defined literal support on Intel C++
-    compiler (https://github.com/fmtlib/fmt/issues/311,
-    https://github.com/fmtlib/fmt/pull/312).
-    Thanks @dean0x7d and @speth.
-
--   Reduced compile time
-    (https://github.com/fmtlib/fmt/pull/243,
-    https://github.com/fmtlib/fmt/pull/249,
-    https://github.com/fmtlib/fmt/issues/317):
-
-    ![](https://cloud.githubusercontent.com/assets/4831417/11614060/b9e826d2-9c36-11e5-8666-d4131bf503ef.png)
-
-    ![](https://cloud.githubusercontent.com/assets/4831417/11614080/6ac903cc-9c37-11e5-8165-26df6efae364.png)
-
-    Thanks @dean0x7d.
-
--   Compile test fixes (https://github.com/fmtlib/fmt/pull/313).
-    Thanks @dean0x7d.
-
--   Documentation fixes (https://github.com/fmtlib/fmt/pull/239,
-    https://github.com/fmtlib/fmt/issues/248,
-    https://github.com/fmtlib/fmt/issues/252,
-    https://github.com/fmtlib/fmt/pull/258,
-    https://github.com/fmtlib/fmt/issues/260,
-    https://github.com/fmtlib/fmt/issues/301,
-    https://github.com/fmtlib/fmt/pull/309).
-    Thanks @ReadmeCritic @Gachapen and @jwilk.
-
--   Fixed compiler and sanitizer warnings
-    (https://github.com/fmtlib/fmt/issues/244,
-    https://github.com/fmtlib/fmt/pull/256,
-    https://github.com/fmtlib/fmt/pull/259,
-    https://github.com/fmtlib/fmt/issues/263,
-    https://github.com/fmtlib/fmt/issues/274,
-    https://github.com/fmtlib/fmt/pull/277,
-    https://github.com/fmtlib/fmt/pull/286,
-    https://github.com/fmtlib/fmt/issues/291,
-    https://github.com/fmtlib/fmt/issues/296,
-    https://github.com/fmtlib/fmt/issues/308).
-    Thanks @mwinterb, @pweiskircher and @Naios.
-
--   Improved compatibility with Windows Store apps
-    (https://github.com/fmtlib/fmt/issues/280,
-    https://github.com/fmtlib/fmt/pull/285) Thanks @mwinterb.
-
--   Added tests of compatibility with older C++ standards
-    (https://github.com/fmtlib/fmt/pull/273). Thanks @niosHD.
-
--   Fixed Android build
-    (https://github.com/fmtlib/fmt/pull/271). Thanks @newnon.
-
--   Changed `ArgMap` to be backed by a vector instead of a map.
-    (https://github.com/fmtlib/fmt/issues/261,
-    https://github.com/fmtlib/fmt/pull/262). Thanks @mwinterb.
-
--   Added `fprintf` overload that writes to a `std::ostream`
-    (https://github.com/fmtlib/fmt/pull/251).
-    Thanks @nickhutchinson.
-
--   Export symbols when building a Windows DLL
-    (https://github.com/fmtlib/fmt/pull/245).
-    Thanks @macdems.
-
--   Fixed compilation on Cygwin
-    (https://github.com/fmtlib/fmt/issues/304).
-
--   Implemented a workaround for a bug in Apple LLVM version 4.2 of
-    clang (https://github.com/fmtlib/fmt/issues/276).
-
--   Implemented a workaround for Google Test bug
-    https://github.com/google/googletest/issues/705 on gcc 6
-    (https://github.com/fmtlib/fmt/issues/268). Thanks @octoploid.
-
--   Removed Biicode support because the latter has been discontinued.
-
-# 2.1.1 - 2016-04-11
-
--   The install location for generated CMake files is now configurable
-    via the `FMT_CMAKE_DIR` CMake variable
-    (https://github.com/fmtlib/fmt/pull/299). Thanks @niosHD.
--   Documentation fixes
-    (https://github.com/fmtlib/fmt/issues/252).
-
-# 2.1.0 - 2016-03-21
-
--   Project layout and build system improvements
-    (https://github.com/fmtlib/fmt/pull/267):
-
-    -   The code have been moved to the `cppformat` directory. Including
-        `format.h` from the top-level directory is deprecated but works
-        via a proxy header which will be removed in the next major
-        version.
-    -   C++ Format CMake targets now have proper interface definitions.
-    -   Installed version of the library now supports the header-only
-        configuration.
-    -   Targets `doc`, `install`, and `test` are now disabled if C++
-        Format is included as a CMake subproject. They can be enabled by
-        setting `FMT_DOC`, `FMT_INSTALL`, and `FMT_TEST` in the parent
-        project.
-
-    Thanks @niosHD.
-
-# 2.0.1 - 2016-03-13
-
--   Improved CMake find and package support
-    (https://github.com/fmtlib/fmt/issues/264). Thanks @niosHD.
--   Fix compile error with Android NDK and mingw32
-    (https://github.com/fmtlib/fmt/issues/241). Thanks @Gachapen.
--   Documentation fixes
-    (https://github.com/fmtlib/fmt/issues/248,
-    https://github.com/fmtlib/fmt/issues/260).
-
-# 2.0.0 - 2015-12-01
-
-## General
-
--   \[Breaking\] Named arguments
-    (https://github.com/fmtlib/fmt/pull/169,
-    https://github.com/fmtlib/fmt/pull/173,
-    https://github.com/fmtlib/fmt/pull/174):
-
-    ```c++
-    fmt::print("The answer is {answer}.", fmt::arg("answer", 42));
-    ```
-
-    Thanks @jamboree.
-
--   \[Experimental\] User-defined literals for format and named
-    arguments (https://github.com/fmtlib/fmt/pull/204,
-    https://github.com/fmtlib/fmt/pull/206,
-    https://github.com/fmtlib/fmt/pull/207):
-
-    ```c++
-    using namespace fmt::literals;
-    fmt::print("The answer is {answer}.", "answer"_a=42);
-    ```
-
-    Thanks @dean0x7d.
-
--   \[Breaking\] Formatting of more than 16 arguments is now supported
-    when using variadic templates
-    (https://github.com/fmtlib/fmt/issues/141). Thanks @Shauren.
-
--   Runtime width specification
-    (https://github.com/fmtlib/fmt/pull/168):
-
-    ```c++
-    fmt::format("{0:{1}}", 42, 5); // gives "   42"
-    ```
-
-    Thanks @jamboree.
-
--   \[Breaking\] Enums are now formatted with an overloaded
-    `std::ostream` insertion operator (`operator<<`) if available
-    (https://github.com/fmtlib/fmt/issues/232).
-
--   \[Breaking\] Changed default `bool` format to textual, \"true\" or
-    \"false\" (https://github.com/fmtlib/fmt/issues/170):
-
-    ```c++
-    fmt::print("{}", true); // prints "true"
-    ```
-
-    To print `bool` as a number use numeric format specifier such as
-    `d`:
-
-    ```c++
-    fmt::print("{:d}", true); // prints "1"
-    ```
-
--   `fmt::printf` and `fmt::sprintf` now support formatting of `bool`
-    with the `%s` specifier giving textual output, \"true\" or \"false\"
-    (https://github.com/fmtlib/fmt/pull/223):
-
-    ```c++
-    fmt::printf("%s", true); // prints "true"
-    ```
-
-    Thanks @LarsGullik.
-
--   \[Breaking\] `signed char` and `unsigned char` are now formatted as
-    integers by default
-    (https://github.com/fmtlib/fmt/pull/217).
-
--   \[Breaking\] Pointers to C strings can now be formatted with the `p`
-    specifier (https://github.com/fmtlib/fmt/pull/223):
-
-    ```c++
-    fmt::print("{:p}", "test"); // prints pointer value
-    ```
-
-    Thanks @LarsGullik.
-
--   \[Breaking\] `fmt::printf` and `fmt::sprintf` now print null
-    pointers as `(nil)` and null strings as `(null)` for consistency
-    with glibc (https://github.com/fmtlib/fmt/pull/226).
-    Thanks @LarsGullik.
-
--   \[Breaking\] `fmt::(s)printf` now supports formatting of objects of
-    user-defined types that provide an overloaded `std::ostream`
-    insertion operator (`operator<<`)
-    (https://github.com/fmtlib/fmt/issues/201):
-
-    ```c++
-    fmt::printf("The date is %s", Date(2012, 12, 9));
-    ```
-
--   \[Breaking\] The `Buffer` template is now part of the public API and
-    can be used to implement custom memory buffers
-    (https://github.com/fmtlib/fmt/issues/140). Thanks @polyvertex.
-
--   \[Breaking\] Improved compatibility between `BasicStringRef` and
-    [std::experimental::basic_string_view](
-    http://en.cppreference.com/w/cpp/experimental/basic_string_view)
-    (https://github.com/fmtlib/fmt/issues/100,
-    https://github.com/fmtlib/fmt/issues/159,
-    https://github.com/fmtlib/fmt/issues/183):
-
-    -   Comparison operators now compare string content, not pointers
-    -   `BasicStringRef::c_str` replaced by `BasicStringRef::data`
-    -   `BasicStringRef` is no longer assumed to be null-terminated
-
-    References to null-terminated strings are now represented by a new
-    class, `BasicCStringRef`.
-
--   Dependency on pthreads introduced by Google Test is now optional
-    (https://github.com/fmtlib/fmt/issues/185).
-
--   New CMake options `FMT_DOC`, `FMT_INSTALL` and `FMT_TEST` to control
-    generation of `doc`, `install` and `test` targets respectively, on
-    by default (https://github.com/fmtlib/fmt/issues/197,
-    https://github.com/fmtlib/fmt/issues/198,
-    https://github.com/fmtlib/fmt/issues/200). Thanks @maddinat0r.
-
--   `noexcept` is now used when compiling with MSVC2015
-    (https://github.com/fmtlib/fmt/pull/215). Thanks @dmkrepo.
-
--   Added an option to disable use of `windows.h` when
-    `FMT_USE_WINDOWS_H` is defined as 0 before including `format.h`
-    (https://github.com/fmtlib/fmt/issues/171). Thanks @alfps.
-
--   \[Breaking\] `windows.h` is now included with `NOMINMAX` unless
-    `FMT_WIN_MINMAX` is defined. This is done to prevent breaking code
-    using `std::min` and `std::max` and only affects the header-only
-    configuration (https://github.com/fmtlib/fmt/issues/152,
-    https://github.com/fmtlib/fmt/pull/153,
-    https://github.com/fmtlib/fmt/pull/154). Thanks @DevO2012.
-
--   Improved support for custom character types
-    (https://github.com/fmtlib/fmt/issues/171). Thanks @alfps.
-
--   Added an option to disable use of IOStreams when `FMT_USE_IOSTREAMS`
-    is defined as 0 before including `format.h`
-    (https://github.com/fmtlib/fmt/issues/205,
-    https://github.com/fmtlib/fmt/pull/208). Thanks @JodiTheTigger.
-
--   Improved detection of `isnan`, `isinf` and `signbit`.
-
-## Optimization
-
--   Made formatting of user-defined types more efficient with a custom
-    stream buffer (https://github.com/fmtlib/fmt/issues/92,
-    https://github.com/fmtlib/fmt/pull/230). Thanks @NotImplemented.
--   Further improved performance of `fmt::Writer` on integer formatting
-    and fixed a minor regression. Now it is \~7% faster than
-    `karma::generate` on Karma\'s benchmark
-    (https://github.com/fmtlib/fmt/issues/186).
--   \[Breaking\] Reduced [compiled code
-    size](https://github.com/fmtlib/fmt#compile-time-and-code-bloat)
-    (https://github.com/fmtlib/fmt/issues/143,
-    https://github.com/fmtlib/fmt/pull/149).
-
-## Distribution
-
--   \[Breaking\] Headers are now installed in
-    `${CMAKE_INSTALL_PREFIX}/include/cppformat`
-    (https://github.com/fmtlib/fmt/issues/178). Thanks @jackyf.
-
--   \[Breaking\] Changed the library name from `format` to `cppformat`
-    for consistency with the project name and to avoid potential
-    conflicts (https://github.com/fmtlib/fmt/issues/178).
-    Thanks @jackyf.
-
--   C++ Format is now available in [Debian](https://www.debian.org/)
-    GNU/Linux
-    ([stretch](https://packages.debian.org/source/stretch/cppformat),
-    [sid](https://packages.debian.org/source/sid/cppformat)) and derived
-    distributions such as
-    [Ubuntu](https://launchpad.net/ubuntu/+source/cppformat) 15.10 and
-    later (https://github.com/fmtlib/fmt/issues/155):
-
-        $ sudo apt-get install libcppformat1-dev
-
-    Thanks @jackyf.
-
--   [Packages for Fedora and
-    RHEL](https://admin.fedoraproject.org/pkgdb/package/cppformat/) are
-    now available. Thanks Dave Johansen.
-
--   C++ Format can now be installed via [Homebrew](http://brew.sh/) on
-    OS X (https://github.com/fmtlib/fmt/issues/157):
-
-        $ brew install cppformat
-
-    Thanks @ortho and Anatoliy Bulukin.
-
-## Documentation
-
--   Migrated from ReadTheDocs to GitHub Pages for better responsiveness
-    and reliability (https://github.com/fmtlib/fmt/issues/128).
-    New documentation address is <http://cppformat.github.io/>.
--   Added [Building thedocumentation](
-    https://fmt.dev/2.0.0/usage.html#building-the-documentation)
-    section to the documentation.
--   Documentation build script is now compatible with Python 3 and newer
-    pip versions. (https://github.com/fmtlib/fmt/pull/189,
-    https://github.com/fmtlib/fmt/issues/209).
-    Thanks @JodiTheTigger and @xentec.
--   Documentation fixes and improvements
-    (https://github.com/fmtlib/fmt/issues/36,
-    https://github.com/fmtlib/fmt/issues/75,
-    https://github.com/fmtlib/fmt/issues/125,
-    https://github.com/fmtlib/fmt/pull/160,
-    https://github.com/fmtlib/fmt/pull/161,
-    https://github.com/fmtlib/fmt/issues/162,
-    https://github.com/fmtlib/fmt/issues/165,
-    https://github.com/fmtlib/fmt/issues/210). 
-    Thanks @syohex.
--   Fixed out-of-tree documentation build
-    (https://github.com/fmtlib/fmt/issues/177). Thanks @jackyf.
-
-## Fixes
-
--   Fixed `initializer_list` detection
-    (https://github.com/fmtlib/fmt/issues/136). Thanks @Gachapen.
-
--   \[Breaking\] Fixed formatting of enums with numeric format
-    specifiers in `fmt::(s)printf`
-    (https://github.com/fmtlib/fmt/issues/131,
-    https://github.com/fmtlib/fmt/issues/139):
-
-    ```c++
-    enum { ANSWER = 42 };
-    fmt::printf("%d", ANSWER);
-    ```
-
-    Thanks @Naios.
-
--   Improved compatibility with old versions of MinGW
-    (https://github.com/fmtlib/fmt/issues/129,
-    https://github.com/fmtlib/fmt/pull/130,
-    https://github.com/fmtlib/fmt/issues/132). Thanks @cstamford.
-
--   Fixed a compile error on MSVC with disabled exceptions
-    (https://github.com/fmtlib/fmt/issues/144).
-
--   Added a workaround for broken implementation of variadic templates
-    in MSVC2012 (https://github.com/fmtlib/fmt/issues/148).
-
--   Placed the anonymous namespace within `fmt` namespace for the
-    header-only configuration (https://github.com/fmtlib/fmt/issues/171).
-    Thanks @alfps.
-
--   Fixed issues reported by Coverity Scan
-    (https://github.com/fmtlib/fmt/issues/187,
-    https://github.com/fmtlib/fmt/issues/192).
-
--   Implemented a workaround for a name lookup bug in MSVC2010
-    (https://github.com/fmtlib/fmt/issues/188).
-
--   Fixed compiler warnings
-    (https://github.com/fmtlib/fmt/issues/95,
-    https://github.com/fmtlib/fmt/issues/96,
-    https://github.com/fmtlib/fmt/pull/114,
-    https://github.com/fmtlib/fmt/issues/135,
-    https://github.com/fmtlib/fmt/issues/142,
-    https://github.com/fmtlib/fmt/issues/145,
-    https://github.com/fmtlib/fmt/issues/146,
-    https://github.com/fmtlib/fmt/issues/158,
-    https://github.com/fmtlib/fmt/issues/163,
-    https://github.com/fmtlib/fmt/issues/175,
-    https://github.com/fmtlib/fmt/issues/190,
-    https://github.com/fmtlib/fmt/pull/191,
-    https://github.com/fmtlib/fmt/issues/194,
-    https://github.com/fmtlib/fmt/pull/196,
-    https://github.com/fmtlib/fmt/issues/216,
-    https://github.com/fmtlib/fmt/pull/218,
-    https://github.com/fmtlib/fmt/pull/220,
-    https://github.com/fmtlib/fmt/pull/229,
-    https://github.com/fmtlib/fmt/issues/233,
-    https://github.com/fmtlib/fmt/issues/234,
-    https://github.com/fmtlib/fmt/pull/236,
-    https://github.com/fmtlib/fmt/issues/281,
-    https://github.com/fmtlib/fmt/issues/289).
-    Thanks @seanmiddleditch, @dixlorenz, @CarterLi, @Naios, @fmatthew5876,
-    @LevskiWeng, @rpopescu, @gabime, @cubicool, @jkflying, @LogicalKnight,
-    @inguin and @Jopie64.
-
--   Fixed portability issues (mostly causing test failures) on ARM,
-    ppc64, ppc64le, s390x and SunOS 5.11 i386
-    (https://github.com/fmtlib/fmt/issues/138,
-    https://github.com/fmtlib/fmt/issues/179,
-    https://github.com/fmtlib/fmt/issues/180,
-    https://github.com/fmtlib/fmt/issues/202,
-    https://github.com/fmtlib/fmt/issues/225, [Red Hat Bugzilla
-    Bug 1260297](https://bugzilla.redhat.com/show_bug.cgi?id=1260297)).
-    Thanks @Naios, @jackyf and Dave Johansen.
-
--   Fixed a name conflict with macro `free` defined in `crtdbg.h` when
-    `_CRTDBG_MAP_ALLOC` is set (https://github.com/fmtlib/fmt/issues/211).
-
--   Fixed shared library build on OS X
-    (https://github.com/fmtlib/fmt/pull/212). Thanks @dean0x7d.
-
--   Fixed an overload conflict on MSVC when `/Zc:wchar_t-` option is
-    specified (https://github.com/fmtlib/fmt/pull/214).
-    Thanks @slavanap.
-
--   Improved compatibility with MSVC 2008
-    (https://github.com/fmtlib/fmt/pull/236). Thanks @Jopie64.
-
--   Improved compatibility with bcc32
-    (https://github.com/fmtlib/fmt/issues/227).
-
--   Fixed `static_assert` detection on Clang
-    (https://github.com/fmtlib/fmt/pull/228). Thanks @dean0x7d.
-
-# 1.1.0 - 2015-03-06
-
--   Added `BasicArrayWriter`, a class template that provides operations
-    for formatting and writing data into a fixed-size array
-    (https://github.com/fmtlib/fmt/issues/105 and
-    https://github.com/fmtlib/fmt/issues/122):
-
-    ```c++
-    char buffer[100];
-    fmt::ArrayWriter w(buffer);
-    w.write("The answer is {}", 42);
-    ```
-
--   Added [0 A.D.](http://play0ad.com/) and [PenUltima Online
-    (POL)](http://www.polserver.com/) to the list of notable projects
-    using C++ Format.
-
--   C++ Format now uses MSVC intrinsics for better formatting performance
-    (https://github.com/fmtlib/fmt/pull/115,
-    https://github.com/fmtlib/fmt/pull/116,
-    https://github.com/fmtlib/fmt/pull/118 and
-    https://github.com/fmtlib/fmt/pull/121). Previously these
-    optimizations where only used on GCC and Clang.
-    Thanks @CarterLi and @objectx.
-
--   CMake install target
-    (https://github.com/fmtlib/fmt/pull/119). Thanks @TrentHouliston.
-
-    You can now install C++ Format with `make install` command.
-
--   Improved [Biicode](http://www.biicode.com/) support
-    (https://github.com/fmtlib/fmt/pull/98 and
-    https://github.com/fmtlib/fmt/pull/104).
-    Thanks @MariadeAnton and @franramirez688.
-
--   Improved support for building with [Android NDK](
-    https://developer.android.com/tools/sdk/ndk/index.html)
-    (https://github.com/fmtlib/fmt/pull/107). Thanks @newnon.
-
-    The [android-ndk-example](https://github.com/fmtlib/android-ndk-example)
-    repository provides and example of using C++ Format with Android NDK:
-
-    ![](https://raw.githubusercontent.com/fmtlib/android-ndk-example/master/screenshot.png)
-
--   Improved documentation of `SystemError` and `WindowsError`
-    (https://github.com/fmtlib/fmt/issues/54).
-
--   Various code improvements
-    (https://github.com/fmtlib/fmt/pull/110,
-    https://github.com/fmtlib/fmt/pull/111
-    https://github.com/fmtlib/fmt/pull/112). Thanks @CarterLi.
-
--   Improved compile-time errors when formatting wide into narrow
-    strings (https://github.com/fmtlib/fmt/issues/117).
-
--   Fixed `BasicWriter::write` without formatting arguments when C++11
-    support is disabled
-    (https://github.com/fmtlib/fmt/issues/109).
-
--   Fixed header-only build on OS X with GCC 4.9
-    (https://github.com/fmtlib/fmt/issues/124).
-
--   Fixed packaging issues (https://github.com/fmtlib/fmt/issues/94).
-
--   Added [changelog](https://github.com/fmtlib/fmt/blob/master/ChangeLog.md)
-    (https://github.com/fmtlib/fmt/issues/103).
-
-# 1.0.0 - 2015-02-05
-
--   Add support for a header-only configuration when `FMT_HEADER_ONLY`
-    is defined before including `format.h`:
-
-    ```c++
-    #define FMT_HEADER_ONLY
-    #include "format.h"
-    ```
-
--   Compute string length in the constructor of `BasicStringRef` instead
-    of the `size` method
-    (https://github.com/fmtlib/fmt/issues/79). This eliminates
-    size computation for string literals on reasonable optimizing
-    compilers.
-
--   Fix formatting of types with overloaded `operator <<` for
-    `std::wostream` (https://github.com/fmtlib/fmt/issues/86):
-
-    ```c++
-    fmt::format(L"The date is {0}", Date(2012, 12, 9));
-    ```
-
--   Fix linkage of tests on Arch Linux
-    (https://github.com/fmtlib/fmt/issues/89).
-
--   Allow precision specifier for non-float arguments
-    (https://github.com/fmtlib/fmt/issues/90):
-
-    ```c++
-    fmt::print("{:.3}\n", "Carpet"); // prints "Car"
-    ```
-
--   Fix build on Android NDK (https://github.com/fmtlib/fmt/issues/93).
-
--   Improvements to documentation build procedure.
-
--   Remove `FMT_SHARED` CMake variable in favor of standard [BUILD_SHARED_LIBS](
-    http://www.cmake.org/cmake/help/v3.0/variable/BUILD_SHARED_LIBS.html).
-
--   Fix error handling in `fmt::fprintf`.
-
--   Fix a number of warnings.
-
-# 0.12.0 - 2014-10-25
-
--   \[Breaking\] Improved separation between formatting and buffer
-    management. `Writer` is now a base class that cannot be instantiated
-    directly. The new `MemoryWriter` class implements the default buffer
-    management with small allocations done on stack. So `fmt::Writer`
-    should be replaced with `fmt::MemoryWriter` in variable
-    declarations.
-
-    Old code:
-
-    ```c++
-    fmt::Writer w;
-    ```
-
-    New code:
-
-    ```c++
-    fmt::MemoryWriter w;
-    ```
-
-    If you pass `fmt::Writer` by reference, you can continue to do so:
-
-    ```c++
-    void f(fmt::Writer &w);
-    ```
-
-    This doesn\'t affect the formatting API.
-
--   Support for custom memory allocators
-    (https://github.com/fmtlib/fmt/issues/69)
-
--   Formatting functions now accept [signed char]{.title-ref} and
-    [unsigned char]{.title-ref} strings as arguments
-    (https://github.com/fmtlib/fmt/issues/73):
-
-    ```c++
-    auto s = format("GLSL version: {}", glGetString(GL_VERSION));
-    ```
-
--   Reduced code bloat. According to the new [benchmark
-    results](https://github.com/fmtlib/fmt#compile-time-and-code-bloat),
-    cppformat is close to `printf` and by the order of magnitude better
-    than Boost Format in terms of compiled code size.
-
--   Improved appearance of the documentation on mobile by using the
-    [Sphinx Bootstrap
-    theme](http://ryan-roemer.github.io/sphinx-bootstrap-theme/):
-
-    | Old | New |
-    | --- | --- |
-    | ![](https://cloud.githubusercontent.com/assets/576385/4792130/cd256436-5de3-11e4-9a62-c077d0c2b003.png) | ![](https://cloud.githubusercontent.com/assets/576385/4792131/cd29896c-5de3-11e4-8f59-cac952942bf0.png) |
-
-# 0.11.0 - 2014-08-21
-
--   Safe printf implementation with a POSIX extension for positional
-    arguments:
-
-    ```c++
-    fmt::printf("Elapsed time: %.2f seconds", 1.23);
-    fmt::printf("%1$s, %3$d %2$s", weekday, month, day);
-    ```
-
--   Arguments of `char` type can now be formatted as integers (Issue
-    https://github.com/fmtlib/fmt/issues/55):
-
-    ```c++
-    fmt::format("0x{0:02X}", 'a');
-    ```
-
--   Deprecated parts of the API removed.
-
--   The library is now built and tested on MinGW with Appveyor in
-    addition to existing test platforms Linux/GCC, OS X/Clang,
-    Windows/MSVC.
-
-# 0.10.0 - 2014-07-01
-
-**Improved API**
-
--   All formatting methods are now implemented as variadic functions
-    instead of using `operator<<` for feeding arbitrary arguments into a
-    temporary formatter object. This works both with C++11 where
-    variadic templates are used and with older standards where variadic
-    functions are emulated by providing lightweight wrapper functions
-    defined with the `FMT_VARIADIC` macro. You can use this macro for
-    defining your own portable variadic functions:
-
-    ```c++
-    void report_error(const char *format, const fmt::ArgList &args) {
-      fmt::print("Error: {}");
-      fmt::print(format, args);
-    }
-    FMT_VARIADIC(void, report_error, const char *)
-
-    report_error("file not found: {}", path);
-    ```
-
-    Apart from a more natural syntax, this also improves performance as
-    there is no need to construct temporary formatter objects and
-    control arguments\' lifetimes. Because the wrapper functions are
-    very lightweight, this doesn\'t cause code bloat even in pre-C++11
-    mode.
-
--   Simplified common case of formatting an `std::string`. Now it
-    requires a single function call:
-
-    ```c++
-    std::string s = format("The answer is {}.", 42);
-    ```
-
-    Previously it required 2 function calls:
-
-    ```c++
-    std::string s = str(Format("The answer is {}.") << 42);
-    ```
-
-    Instead of unsafe `c_str` function, `fmt::Writer` should be used
-    directly to bypass creation of `std::string`:
-
-    ```c++
-    fmt::Writer w;
-    w.write("The answer is {}.", 42);
-    w.c_str();  // returns a C string
-    ```
-
-    This doesn\'t do dynamic memory allocation for small strings and is
-    less error prone as the lifetime of the string is the same as for
-    `std::string::c_str` which is well understood (hopefully).
-
--   Improved consistency in naming functions that are a part of the
-    public API. Now all public functions are lowercase following the
-    standard library conventions. Previously it was a combination of
-    lowercase and CapitalizedWords. Issue
-    https://github.com/fmtlib/fmt/issues/50.
-
--   Old functions are marked as deprecated and will be removed in the
-    next release.
-
-**Other Changes**
-
--   Experimental support for printf format specifications (work in
-    progress):
-
-    ```c++
-    fmt::printf("The answer is %d.", 42);
-    std::string s = fmt::sprintf("Look, a %s!", "string");
-    ```
-
--   Support for hexadecimal floating point format specifiers `a` and
-    `A`:
-
-    ```c++
-    print("{:a}", -42.0); // Prints -0x1.5p+5
-    print("{:A}", -42.0); // Prints -0X1.5P+5
-    ```
-
--   CMake option `FMT_SHARED` that specifies whether to build format as
-    a shared library (off by default).
-
-# 0.9.0 - 2014-05-13
-
--   More efficient implementation of variadic formatting functions.
-
--   `Writer::Format` now has a variadic overload:
-
-    ```c++
-    Writer out;
-    out.Format("Look, I'm {}!", "variadic");
-    ```
-
--   For efficiency and consistency with other overloads, variadic
-    overload of the `Format` function now returns `Writer` instead of
-    `std::string`. Use the `str` function to convert it to
-    `std::string`:
-
-    ```c++
-    std::string s = str(Format("Look, I'm {}!", "variadic"));
-    ```
-
--   Replaced formatter actions with output sinks: `NoAction` -\>
-    `NullSink`, `Write` -\> `FileSink`, `ColorWriter` -\>
-    `ANSITerminalSink`. This improves naming consistency and shouldn\'t
-    affect client code unless these classes are used directly which
-    should be rarely needed.
-
--   Added `ThrowSystemError` function that formats a message and throws
-    `SystemError` containing the formatted message and system-specific
-    error description. For example, the following code
-
-    ```c++
-    FILE *f = fopen(filename, "r");
-    if (!f)
-      ThrowSystemError(errno, "Failed to open file '{}'") << filename;
-    ```
-
-    will throw `SystemError` exception with description \"Failed to open
-    file \'\<filename\>\': No such file or directory\" if file doesn\'t
-    exist.
-
--   Support for AppVeyor continuous integration platform.
-
--   `Format` now throws `SystemError` in case of I/O errors.
-
--   Improve test infrastructure. Print functions are now tested by
-    redirecting the output to a pipe.
-
-# 0.8.0 - 2014-04-14
-
--   Initial release
diff --git a/3party/fmt/LICENSE b/3party/fmt/LICENSE
deleted file mode 100644
index 1cd1ef9..0000000
--- a/3party/fmt/LICENSE
+++ /dev/null
@@ -1,27 +0,0 @@
-Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors
-
-Permission is hereby granted, free of charge, to any person obtaining
-a copy of this software and associated documentation files (the
-"Software"), to deal in the Software without restriction, including
-without limitation the rights to use, copy, modify, merge, publish,
-distribute, sublicense, and/or sell copies of the Software, and to
-permit persons to whom the Software is furnished to do so, subject to
-the following conditions:
-
-The above copyright notice and this permission notice shall be
-included in all copies or substantial portions of the Software.
-
-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
---- Optional exception to the license ---
-
-As an exception, if, as a result of your compiling your source code, portions
-of this Software are embedded into a machine-executable object form of such
-source code, you may redistribute such embedded portions in such object form
-without including the above copyright and permission notices.
diff --git a/3party/fmt/README.md b/3party/fmt/README.md
deleted file mode 100644
index dcfb16e..0000000
--- a/3party/fmt/README.md
+++ /dev/null
@@ -1,490 +0,0 @@
-<img src="https://user-images.githubusercontent.com/576385/156254208-f5b743a9-88cf-439d-b0c0-923d53e8d551.png" alt="{fmt}" width="25%"/>
-
-[![image](https://github.com/fmtlib/fmt/workflows/linux/badge.svg)](https://github.com/fmtlib/fmt/actions?query=workflow%3Alinux)
-[![image](https://github.com/fmtlib/fmt/workflows/macos/badge.svg)](https://github.com/fmtlib/fmt/actions?query=workflow%3Amacos)
-[![image](https://github.com/fmtlib/fmt/workflows/windows/badge.svg)](https://github.com/fmtlib/fmt/actions?query=workflow%3Awindows)
-[![fmt is continuously fuzzed at oss-fuzz](https://oss-fuzz-build-logs.storage.googleapis.com/badges/fmt.svg)](https://bugs.chromium.org/p/oss-fuzz/issues/list?\%0Acolspec=ID%20Type%20Component%20Status%20Proj%20Reported%20Owner%20\%0ASummary&q=proj%3Dfmt&can=1)
-[![Ask questions at StackOverflow with the tag fmt](https://img.shields.io/badge/stackoverflow-fmt-blue.svg)](https://stackoverflow.com/questions/tagged/fmt)
-[![image](https://api.securityscorecards.dev/projects/github.com/fmtlib/fmt/badge)](https://securityscorecards.dev/viewer/?uri=github.com/fmtlib/fmt)
-
-**{fmt}** is an open-source formatting library providing a fast and safe
-alternative to C stdio and C++ iostreams.
-
-If you like this project, please consider donating to one of the funds
-that help victims of the war in Ukraine: <https://www.stopputin.net/>.
-
-[Documentation](https://fmt.dev)
-
-[Cheat Sheets](https://hackingcpp.com/cpp/libs/fmt.html)
-
-Q&A: ask questions on [StackOverflow with the tag
-fmt](https://stackoverflow.com/questions/tagged/fmt).
-
-Try {fmt} in [Compiler Explorer](https://godbolt.org/z/Eq5763).
-
-# Features
-
-- Simple [format API](https://fmt.dev/latest/api.html) with positional
-  arguments for localization
-- Implementation of [C++20
-  std::format](https://en.cppreference.com/w/cpp/utility/format) and
-  [C++23 std::print](https://en.cppreference.com/w/cpp/io/print)
-- [Format string syntax](https://fmt.dev/latest/syntax.html) similar
-  to Python\'s
-  [format](https://docs.python.org/3/library/stdtypes.html#str.format)
-- Fast IEEE 754 floating-point formatter with correct rounding,
-  shortness and round-trip guarantees using the
-  [Dragonbox](https://github.com/jk-jeon/dragonbox) algorithm
-- Portable Unicode support
-- Safe [printf
-  implementation](https://fmt.dev/latest/api.html#printf-formatting)
-  including the POSIX extension for positional arguments
-- Extensibility: [support for user-defined
-  types](https://fmt.dev/latest/api.html#formatting-user-defined-types)
-- High performance: faster than common standard library
-  implementations of `(s)printf`, iostreams, `to_string` and
-  `to_chars`, see [Speed tests](#speed-tests) and [Converting a
-  hundred million integers to strings per
-  second](http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html)
-- Small code size both in terms of source code with the minimum
-  configuration consisting of just three files, `core.h`, `format.h`
-  and `format-inl.h`, and compiled code; see [Compile time and code
-  bloat](#compile-time-and-code-bloat)
-- Reliability: the library has an extensive set of
-  [tests](https://github.com/fmtlib/fmt/tree/master/test) and is
-  [continuously fuzzed](https://bugs.chromium.org/p/oss-fuzz/issues/list?colspec=ID%20Type%20Component%20Status%20Proj%20Reported%20Owner%20Summary&q=proj%3Dfmt&can=1)
-- Safety: the library is fully type-safe, errors in format strings can
-  be reported at compile time, automatic memory management prevents
-  buffer overflow errors
-- Ease of use: small self-contained code base, no external
-  dependencies, permissive MIT
-  [license](https://github.com/fmtlib/fmt/blob/master/LICENSE.rst)
-- [Portability](https://fmt.dev/latest/index.html#portability) with
-  consistent output across platforms and support for older compilers
-- Clean warning-free codebase even on high warning levels such as
-  `-Wall -Wextra -pedantic`
-- Locale independence by default
-- Optional header-only configuration enabled with the
-  `FMT_HEADER_ONLY` macro
-
-See the [documentation](https://fmt.dev) for more details.
-
-# Examples
-
-**Print to stdout** ([run](https://godbolt.org/z/Tevcjh))
-
-``` c++
-#include <fmt/core.h>
-
-int main() {
-  fmt::print("Hello, world!\n");
-}
-```
-
-**Format a string** ([run](https://godbolt.org/z/oK8h33))
-
-``` c++
-std::string s = fmt::format("The answer is {}.", 42);
-// s == "The answer is 42."
-```
-
-**Format a string using positional arguments**
-([run](https://godbolt.org/z/Yn7Txe))
-
-``` c++
-std::string s = fmt::format("I'd rather be {1} than {0}.", "right", "happy");
-// s == "I'd rather be happy than right."
-```
-
-**Print dates and times** ([run](https://godbolt.org/z/c31ExdY3W))
-
-``` c++
-#include <fmt/chrono.h>
-
-int main() {
-  auto now = std::chrono::system_clock::now();
-  fmt::print("Date and time: {}\n", now);
-  fmt::print("Time: {:%H:%M}\n", now);
-}
-```
-
-Output:
-
-    Date and time: 2023-12-26 19:10:31.557195597
-    Time: 19:10
-
-**Print a container** ([run](https://godbolt.org/z/MxM1YqjE7))
-
-``` c++
-#include <vector>
-#include <fmt/ranges.h>
-
-int main() {
-  std::vector<int> v = {1, 2, 3};
-  fmt::print("{}\n", v);
-}
-```
-
-Output:
-
-    [1, 2, 3]
-
-**Check a format string at compile time**
-
-``` c++
-std::string s = fmt::format("{:d}", "I am not a number");
-```
-
-This gives a compile-time error in C++20 because `d` is an invalid
-format specifier for a string.
-
-**Write a file from a single thread**
-
-``` c++
-#include <fmt/os.h>
-
-int main() {
-  auto out = fmt::output_file("guide.txt");
-  out.print("Don't {}", "Panic");
-}
-```
-
-This can be [5 to 9 times faster than
-fprintf](http://www.zverovich.net/2020/08/04/optimal-file-buffer-size.html).
-
-**Print with colors and text styles**
-
-``` c++
-#include <fmt/color.h>
-
-int main() {
-  fmt::print(fg(fmt::color::crimson) | fmt::emphasis::bold,
-             "Hello, {}!\n", "world");
-  fmt::print(fg(fmt::color::floral_white) | bg(fmt::color::slate_gray) |
-             fmt::emphasis::underline, "Olá, {}!\n", "Mundo");
-  fmt::print(fg(fmt::color::steel_blue) | fmt::emphasis::italic,
-             "你好{}！\n", "世界");
-}
-```
-
-Output on a modern terminal with Unicode support:
-
-![image](https://github.com/fmtlib/fmt/assets/%0A576385/2a93c904-d6fa-4aa6-b453-2618e1c327d7)
-
-# Benchmarks
-
-## Speed tests
-
-| Library           | Method        | Run Time, s |
-|-------------------|---------------|-------------|
-| libc              | printf        |   0.91      |
-| libc++            | std::ostream  |   2.49      |
-| {fmt} 9.1         | fmt::print    |   0.74      |
-| Boost Format 1.80 | boost::format |   6.26      |
-| Folly Format      | folly::format |   1.87      |
-
-{fmt} is the fastest of the benchmarked methods, \~20% faster than
-`printf`.
-
-The above results were generated by building `tinyformat_test.cpp` on
-macOS 12.6.1 with `clang++ -O3 -DNDEBUG -DSPEED_TEST -DHAVE_FORMAT`, and
-taking the best of three runs. In the test, the format string
-`"%0.10f:%04d:%+g:%s:%p:%c:%%\n"` or equivalent is filled 2,000,000
-times with output sent to `/dev/null`; for further details refer to the
-[source](https://github.com/fmtlib/format-benchmark/blob/master/src/tinyformat-test.cc).
-
-{fmt} is up to 20-30x faster than `std::ostringstream` and `sprintf` on
-IEEE754 `float` and `double` formatting
-([dtoa-benchmark](https://github.com/fmtlib/dtoa-benchmark)) and faster
-than [double-conversion](https://github.com/google/double-conversion)
-and [ryu](https://github.com/ulfjack/ryu):
-
-[![image](https://user-images.githubusercontent.com/576385/95684665-11719600-0ba8-11eb-8e5b-972ff4e49428.png)](https://fmt.dev/unknown_mac64_clang12.0.html)
-
-## Compile time and code bloat
-
-The script
-[bloat-test.py](https://github.com/fmtlib/format-benchmark/blob/master/bloat-test.py)
-from [format-benchmark](https://github.com/fmtlib/format-benchmark)
-tests compile time and code bloat for nontrivial projects. It generates
-100 translation units and uses `printf()` or its alternative five times
-in each to simulate a medium-sized project. The resulting executable
-size and compile time (Apple LLVM version 8.1.0 (clang-802.0.42), macOS
-Sierra, best of three) is shown in the following tables.
-
-**Optimized build (-O3)**
-
-| Method        | Compile Time, s | Executable size, KiB | Stripped size, KiB |
-|---------------|-----------------|----------------------|--------------------|
-| printf        |   2.6           |   29                 |   26               |
-| printf+string |   16.4          |   29                 |   26               |
-| iostreams     |   31.1          |   59                 |   55               |
-| {fmt}         |   19.0          |   37                 |   34               |
-| Boost Format  |   91.9          |   226                |   203              |
-| Folly Format  |   115.7         |   101                |   88               |
-
-As you can see, {fmt} has 60% less overhead in terms of resulting binary
-code size compared to iostreams and comes pretty close to `printf`.
-Boost Format and Folly Format have the largest overheads.
-
-`printf+string` is the same as `printf` but with an extra `<string>`
-include to measure the overhead of the latter.
-
-**Non-optimized build**
-
-| Method        | Compile Time, s | Executable size, KiB | Stripped size, KiB |
-|---------------|-----------------|----------------------|--------------------|
-| printf        |   2.2           |   33                 |   30               |
-| printf+string |   16.0          |   33                 |   30               |
-| iostreams     |   28.3          |   56                 |   52               |
-| {fmt}         |   18.2          |   59                 |   50               |
-| Boost Format  |   54.1          |   365                |   303              |
-| Folly Format  |   79.9          |   445                |   430              |
-
-`libc`, `lib(std)c++`, and `libfmt` are all linked as shared libraries
-to compare formatting function overhead only. Boost Format is a
-header-only library so it doesn\'t provide any linkage options.
-
-## Running the tests
-
-Please refer to [Building the
-library](https://fmt.dev/latest/usage.html#building-the-library) for
-instructions on how to build the library and run the unit tests.
-
-Benchmarks reside in a separate repository,
-[format-benchmarks](https://github.com/fmtlib/format-benchmark), so to
-run the benchmarks you first need to clone this repository and generate
-Makefiles with CMake:
-
-    $ git clone --recursive https://github.com/fmtlib/format-benchmark.git
-    $ cd format-benchmark
-    $ cmake .
-
-Then you can run the speed test:
-
-    $ make speed-test
-
-or the bloat test:
-
-    $ make bloat-test
-
-# Migrating code
-
-[clang-tidy](https://clang.llvm.org/extra/clang-tidy/) v17 (not yet
-released) provides the
-[modernize-use-std-print](https://clang.llvm.org/extra/clang-tidy/checks/modernize/use-std-print.html)
-check that is capable of converting occurrences of `printf` and
-`fprintf` to `fmt::print` if configured to do so. (By default it
-converts to `std::print`.)
-
-# Notable projects using this library
-
-- [0 A.D.](https://play0ad.com/): a free, open-source, cross-platform
-  real-time strategy game
-- [AMPL/MP](https://github.com/ampl/mp): an open-source library for
-  mathematical programming
-- [Apple's FoundationDB](https://github.com/apple/foundationdb): an open-source,
-  distributed, transactional key-value store
-- [Aseprite](https://github.com/aseprite/aseprite): animated sprite
-  editor & pixel art tool
-- [AvioBook](https://www.aviobook.aero/en): a comprehensive aircraft
-  operations suite
-- [Blizzard Battle.net](https://battle.net/): an online gaming
-  platform
-- [Celestia](https://celestia.space/): real-time 3D visualization of
-  space
-- [Ceph](https://ceph.com/): a scalable distributed storage system
-- [ccache](https://ccache.dev/): a compiler cache
-- [ClickHouse](https://github.com/ClickHouse/ClickHouse): an
-  analytical database management system
-- [Contour](https://github.com/contour-terminal/contour/): a modern
-  terminal emulator
-- [CUAUV](https://cuauv.org/): Cornell University\'s autonomous
-  underwater vehicle
-- [Drake](https://drake.mit.edu/): a planning, control, and analysis
-  toolbox for nonlinear dynamical systems (MIT)
-- [Envoy](https://lyft.github.io/envoy/): C++ L7 proxy and
-  communication bus (Lyft)
-- [FiveM](https://fivem.net/): a modification framework for GTA V
-- [fmtlog](https://github.com/MengRao/fmtlog): a performant
-  fmtlib-style logging library with latency in nanoseconds
-- [Folly](https://github.com/facebook/folly): Facebook open-source
-  library
-- [GemRB](https://gemrb.org/): a portable open-source implementation
-  of Bioware's Infinity Engine
-- [Grand Mountain
-  Adventure](https://store.steampowered.com/app/1247360/Grand_Mountain_Adventure/):
-  a beautiful open-world ski & snowboarding game
-- [HarpyWar/pvpgn](https://github.com/pvpgn/pvpgn-server): Player vs
-  Player Gaming Network with tweaks
-- [KBEngine](https://github.com/kbengine/kbengine): an open-source
-  MMOG server engine
-- [Keypirinha](https://keypirinha.com/): a semantic launcher for
-  Windows
-- [Kodi](https://kodi.tv/) (formerly xbmc): home theater software
-- [Knuth](https://kth.cash/): high-performance Bitcoin full-node
-- [libunicode](https://github.com/contour-terminal/libunicode/): a
-  modern C++17 Unicode library
-- [MariaDB](https://mariadb.org/): relational database management
-  system
-- [Microsoft Verona](https://github.com/microsoft/verona): research
-  programming language for concurrent ownership
-- [MongoDB](https://mongodb.com/): distributed document database
-- [MongoDB Smasher](https://github.com/duckie/mongo_smasher): a small
-  tool to generate randomized datasets
-- [OpenSpace](https://openspaceproject.com/): an open-source
-  astrovisualization framework
-- [PenUltima Online (POL)](https://www.polserver.com/): an MMO server,
-  compatible with most Ultima Online clients
-- [PyTorch](https://github.com/pytorch/pytorch): an open-source
-  machine learning library
-- [quasardb](https://www.quasardb.net/): a distributed,
-  high-performance, associative database
-- [Quill](https://github.com/odygrd/quill): asynchronous low-latency
-  logging library
-- [QKW](https://github.com/ravijanjam/qkw): generalizing aliasing to
-  simplify navigation, and executing complex multi-line terminal
-  command sequences
-- [redis-cerberus](https://github.com/HunanTV/redis-cerberus): a Redis
-  cluster proxy
-- [redpanda](https://vectorized.io/redpanda): a 10x faster Kafka®
-  replacement for mission-critical systems written in C++
-- [rpclib](http://rpclib.net/): a modern C++ msgpack-RPC server and
-  client library
-- [Salesforce Analytics
-  Cloud](https://www.salesforce.com/analytics-cloud/overview/):
-  business intelligence software
-- [Scylla](https://www.scylladb.com/): a Cassandra-compatible NoSQL
-  data store that can handle 1 million transactions per second on a
-  single server
-- [Seastar](http://www.seastar-project.org/): an advanced, open-source
-  C++ framework for high-performance server applications on modern
-  hardware
-- [spdlog](https://github.com/gabime/spdlog): super fast C++ logging
-  library
-- [Stellar](https://www.stellar.org/): financial platform
-- [Touch Surgery](https://www.touchsurgery.com/): surgery simulator
-- [TrinityCore](https://github.com/TrinityCore/TrinityCore):
-  open-source MMORPG framework
-- [🐙 userver framework](https://userver.tech/): open-source
-  asynchronous framework with a rich set of abstractions and database
-  drivers
-- [Windows Terminal](https://github.com/microsoft/terminal): the new
-  Windows terminal
-
-[More\...](https://github.com/search?q=fmtlib&type=Code)
-
-If you are aware of other projects using this library, please let me
-know by [email](mailto:victor.zverovich@gmail.com) or by submitting an
-[issue](https://github.com/fmtlib/fmt/issues).
-
-# Motivation
-
-So why yet another formatting library?
-
-There are plenty of methods for doing this task, from standard ones like
-the printf family of function and iostreams to Boost Format and
-FastFormat libraries. The reason for creating a new library is that
-every existing solution that I found either had serious issues or
-didn\'t provide all the features I needed.
-
-## printf
-
-The good thing about `printf` is that it is pretty fast and readily
-available being a part of the C standard library. The main drawback is
-that it doesn\'t support user-defined types. `printf` also has safety
-issues although they are somewhat mitigated with [\_\_attribute\_\_
-((format (printf,
-\...))](https://gcc.gnu.org/onlinedocs/gcc/Function-Attributes.html) in
-GCC. There is a POSIX extension that adds positional arguments required
-for
-[i18n](https://en.wikipedia.org/wiki/Internationalization_and_localization)
-to `printf` but it is not a part of C99 and may not be available on some
-platforms.
-
-## iostreams
-
-The main issue with iostreams is best illustrated with an example:
-
-``` c++
-std::cout << std::setprecision(2) << std::fixed << 1.23456 << "\n";
-```
-
-which is a lot of typing compared to printf:
-
-``` c++
-printf("%.2f\n", 1.23456);
-```
-
-Matthew Wilson, the author of FastFormat, called this \"chevron hell\".
-iostreams don\'t support positional arguments by design.
-
-The good part is that iostreams support user-defined types and are safe
-although error handling is awkward.
-
-## Boost Format
-
-This is a very powerful library that supports both `printf`-like format
-strings and positional arguments. Its main drawback is performance.
-According to various benchmarks, it is much slower than other methods
-considered here. Boost Format also has excessive build times and severe
-code bloat issues (see [Benchmarks](#benchmarks)).
-
-## FastFormat
-
-This is an interesting library that is fast, safe, and has positional
-arguments. However, it has significant limitations, citing its author:
-
-> Three features that have no hope of being accommodated within the
-> current design are:
->
-> - Leading zeros (or any other non-space padding)
-> - Octal/hexadecimal encoding
-> - Runtime width/alignment specification
-
-It is also quite big and has a heavy dependency, STLSoft, which might be
-too restrictive for using it in some projects.
-
-## Boost Spirit.Karma
-
-This is not a formatting library but I decided to include it here for
-completeness. As iostreams, it suffers from the problem of mixing
-verbatim text with arguments. The library is pretty fast, but slower on
-integer formatting than `fmt::format_to` with format string compilation
-on Karma\'s own benchmark, see [Converting a hundred million integers to
-strings per
-second](http://www.zverovich.net/2020/06/13/fast-int-to-string-revisited.html).
-
-# License
-
-{fmt} is distributed under the MIT
-[license](https://github.com/fmtlib/fmt/blob/master/LICENSE).
-
-# Documentation License
-
-The [Format String Syntax](https://fmt.dev/latest/syntax.html) section
-in the documentation is based on the one from Python [string module
-documentation](https://docs.python.org/3/library/string.html#module-string).
-For this reason, the documentation is distributed under the Python
-Software Foundation license available in
-[doc/python-license.txt](https://raw.github.com/fmtlib/fmt/master/doc/python-license.txt).
-It only applies if you distribute the documentation of {fmt}.
-
-# Maintainers
-
-The {fmt} library is maintained by Victor Zverovich
-([vitaut](https://github.com/vitaut)) with contributions from many other
-people. See
-[Contributors](https://github.com/fmtlib/fmt/graphs/contributors) and
-[Releases](https://github.com/fmtlib/fmt/releases) for some of the
-names. Let us know if your contribution is not listed or mentioned
-incorrectly and we\'ll make it right.
-
-# Security Policy
-
-To report a security issue, please disclose it at [security
-advisory](https://github.com/fmtlib/fmt/security/advisories/new).
-
-This project is maintained by a team of volunteers on a
-reasonable-effort basis. As such, please give us at least 90 days to
-work on a fix before public exposure.
diff --git a/3party/fmt/fmt/CMakeLists.txt b/3party/fmt/fmt/CMakeLists.txt
new file mode 100644
index 0000000..3259d78
--- /dev/null
+++ b/3party/fmt/fmt/CMakeLists.txt
@@ -0,0 +1,94 @@
+# Define the fmt library, its includes and the needed defines.
+# *.cc are added to FMT_HEADERS for the header-only configuration.
+set(FMT_HEADERS container.h format.h format.cc ostream.h ostream.cc printf.h
+                printf.cc string.h time.h)
+if (HAVE_OPEN)
+  set(FMT_HEADERS ${FMT_HEADERS} posix.h)
+  set(FMT_SOURCES ${FMT_SOURCES} posix.cc)
+endif ()
+
+add_library(fmt ${FMT_SOURCES} ${FMT_HEADERS} ../README.rst ../ChangeLog.rst)
+add_library(fmt::fmt ALIAS fmt)
+
+# Starting with cmake 3.1 the CXX_STANDARD property can be used instead.
+# Note: Don't make -std=c++11 public or interface, since it breaks projects
+# that use C++14.
+target_compile_options(fmt PRIVATE ${CPP11_FLAG})
+if (FMT_PEDANTIC)
+  target_compile_options(fmt PRIVATE ${PEDANTIC_COMPILE_FLAGS})
+endif ()
+
+target_include_directories(fmt PUBLIC
+  $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>
+  $<INSTALL_INTERFACE:include>)
+
+set_target_properties(fmt PROPERTIES
+  VERSION ${FMT_VERSION} SOVERSION ${CPACK_PACKAGE_VERSION_MAJOR})
+
+if (BUILD_SHARED_LIBS)
+  if (UNIX AND NOT APPLE)
+    # Fix rpmlint warning:
+    # unused-direct-shlib-dependency /usr/lib/libformat.so.1.1.0 /lib/libm.so.6.
+    target_link_libraries(fmt -Wl,--as-needed)
+  endif ()
+  target_compile_definitions(fmt PRIVATE FMT_EXPORT INTERFACE FMT_SHARED)
+endif ()
+
+#------------------------------------------------------------------------------
+# additionally define a header only library when cmake is new enough
+if (CMAKE_VERSION VERSION_GREATER 3.1.0 OR CMAKE_VERSION VERSION_EQUAL 3.1.0)
+  add_library(fmt-header-only INTERFACE)
+  add_library(fmt::fmt-header-only ALIAS fmt-header-only)
+
+  target_compile_definitions(fmt-header-only INTERFACE FMT_HEADER_ONLY=1)
+
+  target_include_directories(fmt-header-only INTERFACE
+    $<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}>
+    $<INSTALL_INTERFACE:include>)
+endif ()
+
+# Install targets.
+if (FMT_INSTALL)
+  include(GNUInstallDirs)
+  include(CMakePackageConfigHelpers)
+  set(FMT_CMAKE_DIR ${CMAKE_INSTALL_LIBDIR}/cmake/fmt CACHE STRING
+    "Installation directory for cmake files, relative to ${CMAKE_INSTALL_PREFIX}.")
+  set(version_config ${PROJECT_BINARY_DIR}/fmt-config-version.cmake)
+  set(project_config ${PROJECT_BINARY_DIR}/fmt-config.cmake)
+  set(targets_export_name fmt-targets)
+
+  set (INSTALL_TARGETS fmt)
+  if (TARGET fmt-header-only)
+    set(INSTALL_TARGETS ${INSTALL_TARGETS} fmt-header-only)
+  endif ()
+
+  set(FMT_LIB_DIR ${CMAKE_INSTALL_LIBDIR} CACHE STRING
+    "Installation directory for libraries, relative to ${CMAKE_INSTALL_PREFIX}.")
+
+  set(FMT_INC_DIR ${CMAKE_INSTALL_INCLUDEDIR}/fmt CACHE STRING
+    "Installation directory for include files, relative to ${CMAKE_INSTALL_PREFIX}.")
+
+  # Generate the version, config and target files into the build directory.
+  write_basic_package_version_file(
+    ${version_config}
+    VERSION ${FMT_VERSION}
+    COMPATIBILITY AnyNewerVersion)
+  configure_package_config_file(
+    ${PROJECT_SOURCE_DIR}/support/cmake/fmt-config.cmake.in
+    ${project_config}
+    INSTALL_DESTINATION ${FMT_CMAKE_DIR})
+  export(TARGETS ${INSTALL_TARGETS} NAMESPACE fmt::
+         FILE ${PROJECT_BINARY_DIR}/${targets_export_name}.cmake)
+
+  # Install version, config and target files.
+  install(
+    FILES ${project_config} ${version_config}
+    DESTINATION ${FMT_CMAKE_DIR})
+  install(EXPORT ${targets_export_name} DESTINATION ${FMT_CMAKE_DIR}
+    NAMESPACE fmt::)
+
+  # Install the library and headers.
+  install(TARGETS ${INSTALL_TARGETS} EXPORT ${targets_export_name}
+          DESTINATION ${FMT_LIB_DIR})
+  install(FILES ${FMT_HEADERS} DESTINATION ${FMT_INC_DIR})
+endif ()
diff --git a/3party/fmt/fmt/container.h b/3party/fmt/fmt/container.h
new file mode 100644
index 0000000..cb6303f
--- /dev/null
+++ b/3party/fmt/fmt/container.h
@@ -0,0 +1,82 @@
+/*
+ Formatting library for C++ - standard container utilities
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#ifndef FMT_CONTAINER_H_
+#define FMT_CONTAINER_H_
+
+#include "format.h"
+
+namespace fmt {
+
+namespace internal {
+
+/**
+  \rst
+  A "buffer" that appends data to a standard container (e.g. typically a
+  ``std::vector`` or ``std::basic_string``).
+  \endrst
+ */
+template <typename Container>
+class ContainerBuffer : public Buffer<typename Container::value_type> {
+ private:
+  Container& container_;
+
+ protected:
+  virtual void grow(std::size_t size) FMT_OVERRIDE {
+    container_.resize(size);
+    this->ptr_ = &container_[0];
+    this->capacity_ = size;
+  }
+
+ public:
+  explicit ContainerBuffer(Container& container) : container_(container) {
+    this->size_ = container_.size();
+    if (this->size_ > 0) {
+      this->ptr_ = &container_[0];
+      this->capacity_ = this->size_;
+    }
+  }
+};
+}  // namespace internal
+
+/**
+  \rst
+  This class template provides operations for formatting and appending data
+  to a standard *container* like ``std::vector`` or ``std::basic_string``.
+
+  **Example**::
+
+    void vecformat(std::vector<char>& dest, fmt::BasicCStringRef<char> format,
+                   fmt::ArgList args) {
+      fmt::BasicContainerWriter<std::vector<char> > appender(dest);
+      appender.write(format, args);
+    }
+    FMT_VARIADIC(void, vecformat, std::vector<char>&,
+                 fmt::BasicCStringRef<char>);
+  \endrst
+ */
+template <class Container>
+class BasicContainerWriter
+  : public BasicWriter<typename Container::value_type> {
+ private:
+  internal::ContainerBuffer<Container> buffer_;
+
+ public:
+  /**
+    \rst
+    Constructs a :class:`fmt::BasicContainerWriter` object.
+    \endrst
+   */
+  explicit BasicContainerWriter(Container& dest)
+  : BasicWriter<typename Container::value_type>(buffer_), buffer_(dest) {}
+};
+
+} // namespace fmt
+
+#endif  // FMT_CONTAINER_H_
diff --git a/3party/fmt/fmt/format.cc b/3party/fmt/fmt/format.cc
new file mode 100644
index 0000000..2d236bc
--- /dev/null
+++ b/3party/fmt/fmt/format.cc
@@ -0,0 +1,495 @@
+/*
+ Formatting library for C++
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice, this
+    list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include "format.h"
+
+#include <string.h>
+
+#include <cctype>
+#include <cerrno>
+#include <climits>
+#include <cmath>
+#include <cstdarg>
+#include <cstddef>  // for std::ptrdiff_t
+
+#if defined(_WIN32) && defined(__MINGW32__)
+# include <cstring>
+#endif
+
+#if FMT_USE_WINDOWS_H
+# if !defined(FMT_HEADER_ONLY) && !defined(WIN32_LEAN_AND_MEAN)
+#  define WIN32_LEAN_AND_MEAN
+# endif
+# if defined(NOMINMAX) || defined(FMT_WIN_MINMAX)
+#  include <windows.h>
+# else
+#  define NOMINMAX
+#  include <windows.h>
+#  undef NOMINMAX
+# endif
+#endif
+
+#if FMT_EXCEPTIONS
+# define FMT_TRY try
+# define FMT_CATCH(x) catch (x)
+#else
+# define FMT_TRY if (true)
+# define FMT_CATCH(x) if (false)
+#endif
+
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable: 4127)  // conditional expression is constant
+# pragma warning(disable: 4702)  // unreachable code
+// Disable deprecation warning for strerror. The latter is not called but
+// MSVC fails to detect it.
+# pragma warning(disable: 4996)
+#endif
+
+// Dummy implementations of strerror_r and strerror_s called if corresponding
+// system functions are not available.
+FMT_MAYBE_UNUSED
+static inline fmt::internal::Null<> strerror_r(int, char *, ...) {
+  return fmt::internal::Null<>();
+}
+FMT_MAYBE_UNUSED
+static inline fmt::internal::Null<> strerror_s(char *, std::size_t, ...) {
+  return fmt::internal::Null<>();
+}
+
+namespace fmt {
+
+FMT_FUNC internal::RuntimeError::~RuntimeError() FMT_DTOR_NOEXCEPT {}
+FMT_FUNC FormatError::~FormatError() FMT_DTOR_NOEXCEPT {}
+FMT_FUNC SystemError::~SystemError() FMT_DTOR_NOEXCEPT {}
+
+namespace {
+
+#ifndef _MSC_VER
+# define FMT_SNPRINTF snprintf
+#else  // _MSC_VER
+inline int fmt_snprintf(char *buffer, size_t size, const char *format, ...) {
+  va_list args;
+  va_start(args, format);
+  int result = vsnprintf_s(buffer, size, _TRUNCATE, format, args);
+  va_end(args);
+  return result;
+}
+# define FMT_SNPRINTF fmt_snprintf
+#endif  // _MSC_VER
+
+#if defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT)
+# define FMT_SWPRINTF snwprintf
+#else
+# define FMT_SWPRINTF swprintf
+#endif // defined(_WIN32) && defined(__MINGW32__) && !defined(__NO_ISOCEXT)
+
+const char RESET_COLOR[] = "\x1b[0m";
+
+typedef void (*FormatFunc)(Writer &, int, StringRef);
+
+// Portable thread-safe version of strerror.
+// Sets buffer to point to a string describing the error code.
+// This can be either a pointer to a string stored in buffer,
+// or a pointer to some static immutable string.
+// Returns one of the following values:
+//   0      - success
+//   ERANGE - buffer is not large enough to store the error message
+//   other  - failure
+// Buffer should be at least of size 1.
+int safe_strerror(
+    int error_code, char *&buffer, std::size_t buffer_size) FMT_NOEXCEPT {
+  FMT_ASSERT(buffer != FMT_NULL && buffer_size != 0, "invalid buffer");
+
+  class StrError {
+   private:
+    int error_code_;
+    char *&buffer_;
+    std::size_t buffer_size_;
+
+    // A noop assignment operator to avoid bogus warnings.
+    void operator=(const StrError &) {}
+
+    // Handle the result of XSI-compliant version of strerror_r.
+    int handle(int result) {
+      // glibc versions before 2.13 return result in errno.
+      return result == -1 ? errno : result;
+    }
+
+    // Handle the result of GNU-specific version of strerror_r.
+    int handle(char *message) {
+      // If the buffer is full then the message is probably truncated.
+      if (message == buffer_ && strlen(buffer_) == buffer_size_ - 1)
+        return ERANGE;
+      buffer_ = message;
+      return 0;
+    }
+
+    // Handle the case when strerror_r is not available.
+    int handle(internal::Null<>) {
+      return fallback(strerror_s(buffer_, buffer_size_, error_code_));
+    }
+
+    // Fallback to strerror_s when strerror_r is not available.
+    int fallback(int result) {
+      // If the buffer is full then the message is probably truncated.
+      return result == 0 && strlen(buffer_) == buffer_size_ - 1 ?
+            ERANGE : result;
+    }
+
+#ifdef __c2__
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wdeprecated-declarations"
+#endif
+
+    // Fallback to strerror if strerror_r and strerror_s are not available.
+    int fallback(internal::Null<>) {
+      errno = 0;
+      buffer_ = strerror(error_code_);
+      return errno;
+    }
+
+#ifdef __c2__
+# pragma clang diagnostic pop
+#endif
+
+   public:
+    StrError(int err_code, char *&buf, std::size_t buf_size)
+      : error_code_(err_code), buffer_(buf), buffer_size_(buf_size) {}
+
+    int run() {
+      return handle(strerror_r(error_code_, buffer_, buffer_size_));
+    }
+  };
+  return StrError(error_code, buffer, buffer_size).run();
+}
+
+void format_error_code(Writer &out, int error_code,
+                       StringRef message) FMT_NOEXCEPT {
+  // Report error code making sure that the output fits into
+  // INLINE_BUFFER_SIZE to avoid dynamic memory allocation and potential
+  // bad_alloc.
+  out.clear();
+  static const char SEP[] = ": ";
+  static const char ERROR_STR[] = "error ";
+  // Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
+  std::size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
+  typedef internal::IntTraits<int>::MainType MainType;
+  MainType abs_value = static_cast<MainType>(error_code);
+  if (internal::is_negative(error_code)) {
+    abs_value = 0 - abs_value;
+    ++error_code_size;
+  }
+  error_code_size += internal::count_digits(abs_value);
+  if (message.size() <= internal::INLINE_BUFFER_SIZE - error_code_size)
+    out << message << SEP;
+  out << ERROR_STR << error_code;
+  assert(out.size() <= internal::INLINE_BUFFER_SIZE);
+}
+
+void report_error(FormatFunc func, int error_code,
+                  StringRef message) FMT_NOEXCEPT {
+  MemoryWriter full_message;
+  func(full_message, error_code, message);
+  // Use Writer::data instead of Writer::c_str to avoid potential memory
+  // allocation.
+  std::fwrite(full_message.data(), full_message.size(), 1, stderr);
+  std::fputc('\n', stderr);
+}
+}  // namespace
+
+FMT_FUNC void SystemError::init(
+    int err_code, CStringRef format_str, ArgList args) {
+  error_code_ = err_code;
+  MemoryWriter w;
+  format_system_error(w, err_code, format(format_str, args));
+  std::runtime_error &base = *this;
+  base = std::runtime_error(w.str());
+}
+
+template <typename T>
+int internal::CharTraits<char>::format_float(
+    char *buffer, std::size_t size, const char *format,
+    unsigned width, int precision, T value) {
+  if (width == 0) {
+    return precision < 0 ?
+        FMT_SNPRINTF(buffer, size, format, value) :
+        FMT_SNPRINTF(buffer, size, format, precision, value);
+  }
+  return precision < 0 ?
+      FMT_SNPRINTF(buffer, size, format, width, value) :
+      FMT_SNPRINTF(buffer, size, format, width, precision, value);
+}
+
+template <typename T>
+int internal::CharTraits<wchar_t>::format_float(
+    wchar_t *buffer, std::size_t size, const wchar_t *format,
+    unsigned width, int precision, T value) {
+  if (width == 0) {
+    return precision < 0 ?
+        FMT_SWPRINTF(buffer, size, format, value) :
+        FMT_SWPRINTF(buffer, size, format, precision, value);
+  }
+  return precision < 0 ?
+      FMT_SWPRINTF(buffer, size, format, width, value) :
+      FMT_SWPRINTF(buffer, size, format, width, precision, value);
+}
+
+template <typename T>
+const char internal::BasicData<T>::DIGITS[] =
+    "0001020304050607080910111213141516171819"
+    "2021222324252627282930313233343536373839"
+    "4041424344454647484950515253545556575859"
+    "6061626364656667686970717273747576777879"
+    "8081828384858687888990919293949596979899";
+
+#define FMT_POWERS_OF_10(factor) \
+  factor * 10, \
+  factor * 100, \
+  factor * 1000, \
+  factor * 10000, \
+  factor * 100000, \
+  factor * 1000000, \
+  factor * 10000000, \
+  factor * 100000000, \
+  factor * 1000000000
+
+template <typename T>
+const uint32_t internal::BasicData<T>::POWERS_OF_10_32[] = {
+  0, FMT_POWERS_OF_10(1)
+};
+
+template <typename T>
+const uint64_t internal::BasicData<T>::POWERS_OF_10_64[] = {
+  0,
+  FMT_POWERS_OF_10(1),
+  FMT_POWERS_OF_10(ULongLong(1000000000)),
+  // Multiply several constants instead of using a single long long constant
+  // to avoid warnings about C++98 not supporting long long.
+  ULongLong(1000000000) * ULongLong(1000000000) * 10
+};
+
+FMT_FUNC void internal::report_unknown_type(char code, const char *type) {
+  (void)type;
+  if (std::isprint(static_cast<unsigned char>(code))) {
+    FMT_THROW(FormatError(
+        format("unknown format code '{}' for {}", code, type)));
+  }
+  FMT_THROW(FormatError(
+      format("unknown format code '\\x{:02x}' for {}",
+        static_cast<unsigned>(code), type)));
+}
+
+#if FMT_USE_WINDOWS_H
+
+FMT_FUNC internal::UTF8ToUTF16::UTF8ToUTF16(StringRef s) {
+  static const char ERROR_MSG[] = "cannot convert string from UTF-8 to UTF-16";
+  if (s.size() > INT_MAX)
+    FMT_THROW(WindowsError(ERROR_INVALID_PARAMETER, ERROR_MSG));
+  int s_size = static_cast<int>(s.size());
+  int length = MultiByteToWideChar(
+      CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, FMT_NULL, 0);
+  if (length == 0)
+    FMT_THROW(WindowsError(GetLastError(), ERROR_MSG));
+  buffer_.resize(length + 1);
+  length = MultiByteToWideChar(
+    CP_UTF8, MB_ERR_INVALID_CHARS, s.data(), s_size, &buffer_[0], length);
+  if (length == 0)
+    FMT_THROW(WindowsError(GetLastError(), ERROR_MSG));
+  buffer_[length] = 0;
+}
+
+FMT_FUNC internal::UTF16ToUTF8::UTF16ToUTF8(WStringRef s) {
+  if (int error_code = convert(s)) {
+    FMT_THROW(WindowsError(error_code,
+        "cannot convert string from UTF-16 to UTF-8"));
+  }
+}
+
+FMT_FUNC int internal::UTF16ToUTF8::convert(WStringRef s) {
+  if (s.size() > INT_MAX)
+    return ERROR_INVALID_PARAMETER;
+  int s_size = static_cast<int>(s.size());
+  int length = WideCharToMultiByte(
+    CP_UTF8, 0, s.data(), s_size, FMT_NULL, 0, FMT_NULL, FMT_NULL);
+  if (length == 0)
+    return GetLastError();
+  buffer_.resize(length + 1);
+  length = WideCharToMultiByte(
+    CP_UTF8, 0, s.data(), s_size, &buffer_[0], length, FMT_NULL, FMT_NULL);
+  if (length == 0)
+    return GetLastError();
+  buffer_[length] = 0;
+  return 0;
+}
+
+FMT_FUNC void WindowsError::init(
+    int err_code, CStringRef format_str, ArgList args) {
+  error_code_ = err_code;
+  MemoryWriter w;
+  internal::format_windows_error(w, err_code, format(format_str, args));
+  std::runtime_error &base = *this;
+  base = std::runtime_error(w.str());
+}
+
+FMT_FUNC void internal::format_windows_error(
+    Writer &out, int error_code, StringRef message) FMT_NOEXCEPT {
+  FMT_TRY {
+    MemoryBuffer<wchar_t, INLINE_BUFFER_SIZE> buffer;
+    buffer.resize(INLINE_BUFFER_SIZE);
+    for (;;) {
+      wchar_t *system_message = &buffer[0];
+      int result = FormatMessageW(
+        FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+        FMT_NULL, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
+        system_message, static_cast<uint32_t>(buffer.size()), FMT_NULL);
+      if (result != 0) {
+        UTF16ToUTF8 utf8_message;
+        if (utf8_message.convert(system_message) == ERROR_SUCCESS) {
+          out << message << ": " << utf8_message;
+          return;
+        }
+        break;
+      }
+      if (GetLastError() != ERROR_INSUFFICIENT_BUFFER)
+        break;  // Can't get error message, report error code instead.
+      buffer.resize(buffer.size() * 2);
+    }
+  } FMT_CATCH(...) {}
+  fmt::format_error_code(out, error_code, message);  // 'fmt::' is for bcc32.
+}
+
+#endif  // FMT_USE_WINDOWS_H
+
+FMT_FUNC void format_system_error(
+    Writer &out, int error_code, StringRef message) FMT_NOEXCEPT {
+  FMT_TRY {
+    internal::MemoryBuffer<char, internal::INLINE_BUFFER_SIZE> buffer;
+    buffer.resize(internal::INLINE_BUFFER_SIZE);
+    for (;;) {
+      char *system_message = &buffer[0];
+      int result = safe_strerror(error_code, system_message, buffer.size());
+      if (result == 0) {
+        out << message << ": " << system_message;
+        return;
+      }
+      if (result != ERANGE)
+        break;  // Can't get error message, report error code instead.
+      buffer.resize(buffer.size() * 2);
+    }
+  } FMT_CATCH(...) {}
+  fmt::format_error_code(out, error_code, message);  // 'fmt::' is for bcc32.
+}
+
+template <typename Char>
+void internal::FixedBuffer<Char>::grow(std::size_t) {
+  FMT_THROW(std::runtime_error("buffer overflow"));
+}
+
+FMT_FUNC internal::Arg internal::FormatterBase::do_get_arg(
+    unsigned arg_index, const char *&error) {
+  internal::Arg arg = args_[arg_index];
+  switch (arg.type) {
+  case internal::Arg::NONE:
+    error = "argument index out of range";
+    break;
+  case internal::Arg::NAMED_ARG:
+    arg = *static_cast<const internal::Arg*>(arg.pointer);
+    break;
+  default:
+    /*nothing*/;
+  }
+  return arg;
+}
+
+FMT_FUNC void report_system_error(
+    int error_code, fmt::StringRef message) FMT_NOEXCEPT {
+  // 'fmt::' is for bcc32.
+  report_error(format_system_error, error_code, message);
+}
+
+#if FMT_USE_WINDOWS_H
+FMT_FUNC void report_windows_error(
+    int error_code, fmt::StringRef message) FMT_NOEXCEPT {
+  // 'fmt::' is for bcc32.
+  report_error(internal::format_windows_error, error_code, message);
+}
+#endif
+
+FMT_FUNC void print(std::FILE *f, CStringRef format_str, ArgList args) {
+  MemoryWriter w;
+  w.write(format_str, args);
+  std::fwrite(w.data(), 1, w.size(), f);
+}
+
+FMT_FUNC void print(CStringRef format_str, ArgList args) {
+  print(stdout, format_str, args);
+}
+
+FMT_FUNC void print_colored(Color c, CStringRef format, ArgList args) {
+  char escape[] = "\x1b[30m";
+  escape[3] = static_cast<char>('0' + c);
+  std::fputs(escape, stdout);
+  print(format, args);
+  std::fputs(RESET_COLOR, stdout);
+}
+
+#ifndef FMT_HEADER_ONLY
+
+template struct internal::BasicData<void>;
+
+// Explicit instantiations for char.
+
+template void internal::FixedBuffer<char>::grow(std::size_t);
+
+template FMT_API int internal::CharTraits<char>::format_float(
+    char *buffer, std::size_t size, const char *format,
+    unsigned width, int precision, double value);
+
+template FMT_API int internal::CharTraits<char>::format_float(
+    char *buffer, std::size_t size, const char *format,
+    unsigned width, int precision, long double value);
+
+// Explicit instantiations for wchar_t.
+
+template void internal::FixedBuffer<wchar_t>::grow(std::size_t);
+
+template FMT_API int internal::CharTraits<wchar_t>::format_float(
+    wchar_t *buffer, std::size_t size, const wchar_t *format,
+    unsigned width, int precision, double value);
+
+template FMT_API int internal::CharTraits<wchar_t>::format_float(
+    wchar_t *buffer, std::size_t size, const wchar_t *format,
+    unsigned width, int precision, long double value);
+
+#endif  // FMT_HEADER_ONLY
+
+}  // namespace fmt
+
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif
diff --git a/3party/fmt/fmt/format.h b/3party/fmt/fmt/format.h
new file mode 100644
index 0000000..431d00b
--- /dev/null
+++ b/3party/fmt/fmt/format.h
@@ -0,0 +1,4174 @@
+/*
+ Formatting library for C++
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions are met:
+
+ 1. Redistributions of source code must retain the above copyright notice, this
+    list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright notice,
+    this list of conditions and the following disclaimer in the documentation
+    and/or other materials provided with the distribution.
+
+ THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
+ ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
+ ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef FMT_FORMAT_H_
+#define FMT_FORMAT_H_
+
+#define FMT_INCLUDE
+#include <cassert>
+#include <clocale>
+#include <cmath>
+#include <cstdio>
+#include <cstring>
+#include <limits>
+#include <memory>
+#include <stdexcept>
+#include <string>
+#include <vector>
+#include <utility>  // for std::pair
+#undef FMT_INCLUDE
+
+// The fmt library version in the form major * 10000 + minor * 100 + patch.
+#define FMT_VERSION 40100
+
+#if defined(__has_include)
+# define FMT_HAS_INCLUDE(x) __has_include(x)
+#else
+# define FMT_HAS_INCLUDE(x) 0
+#endif
+
+#if (FMT_HAS_INCLUDE(<string_view>) && __cplusplus > 201402L) || \
+    (defined(_MSVC_LANG) && _MSVC_LANG > 201402L && _MSC_VER >= 1910)
+# include <string_view>
+# define FMT_HAS_STRING_VIEW 1
+#else
+# define FMT_HAS_STRING_VIEW 0
+#endif
+
+#if defined _SECURE_SCL && _SECURE_SCL
+# define FMT_SECURE_SCL _SECURE_SCL
+#else
+# define FMT_SECURE_SCL 0
+#endif
+
+#if FMT_SECURE_SCL
+# include <iterator>
+#endif
+
+#ifdef _MSC_VER
+# define FMT_MSC_VER _MSC_VER
+#else
+# define FMT_MSC_VER 0
+#endif
+
+#if FMT_MSC_VER && FMT_MSC_VER <= 1500
+typedef unsigned __int32 uint32_t;
+typedef unsigned __int64 uint64_t;
+typedef __int64          intmax_t;
+#else
+#include <stdint.h>
+#endif
+
+#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
+# ifdef FMT_EXPORT
+#  define FMT_API __declspec(dllexport)
+# elif defined(FMT_SHARED)
+#  define FMT_API __declspec(dllimport)
+# endif
+#endif
+#ifndef FMT_API
+# define FMT_API
+#endif
+
+#ifdef __GNUC__
+# define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
+# define FMT_GCC_EXTENSION __extension__
+# if FMT_GCC_VERSION >= 406
+#  pragma GCC diagnostic push
+// Disable the warning about "long long" which is sometimes reported even
+// when using __extension__.
+#  pragma GCC diagnostic ignored "-Wlong-long"
+// Disable the warning about declaration shadowing because it affects too
+// many valid cases.
+#  pragma GCC diagnostic ignored "-Wshadow"
+// Disable the warning about implicit conversions that may change the sign of
+// an integer; silencing it otherwise would require many explicit casts.
+#  pragma GCC diagnostic ignored "-Wsign-conversion"
+# endif
+# if __cplusplus >= 201103L || defined __GXX_EXPERIMENTAL_CXX0X__
+#  define FMT_HAS_GXX_CXX11 1
+# endif
+#else
+# define FMT_GCC_VERSION 0
+# define FMT_GCC_EXTENSION
+# define FMT_HAS_GXX_CXX11 0
+#endif
+
+#if defined(__INTEL_COMPILER)
+# define FMT_ICC_VERSION __INTEL_COMPILER
+#elif defined(__ICL)
+# define FMT_ICC_VERSION __ICL
+#endif
+
+#if defined(__clang__) && !defined(FMT_ICC_VERSION)
+# define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
+# pragma clang diagnostic push
+# pragma clang diagnostic ignored "-Wdocumentation-unknown-command"
+# pragma clang diagnostic ignored "-Wpadded"
+#endif
+
+#ifdef __GNUC_LIBSTD__
+# define FMT_GNUC_LIBSTD_VERSION (__GNUC_LIBSTD__ * 100 + __GNUC_LIBSTD_MINOR__)
+#endif
+
+#ifdef __has_feature
+# define FMT_HAS_FEATURE(x) __has_feature(x)
+#else
+# define FMT_HAS_FEATURE(x) 0
+#endif
+
+#ifdef __has_builtin
+# define FMT_HAS_BUILTIN(x) __has_builtin(x)
+#else
+# define FMT_HAS_BUILTIN(x) 0
+#endif
+
+#ifdef __has_cpp_attribute
+# define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
+#else
+# define FMT_HAS_CPP_ATTRIBUTE(x) 0
+#endif
+
+#if FMT_HAS_CPP_ATTRIBUTE(maybe_unused)
+# define FMT_HAS_CXX17_ATTRIBUTE_MAYBE_UNUSED
+// VC++ 1910 support /std: option and that will set _MSVC_LANG macro
+// Clang with Microsoft CodeGen doesn't define _MSVC_LANG macro
+#elif defined(_MSVC_LANG) && _MSVC_LANG > 201402 && _MSC_VER >= 1910
+# define FMT_HAS_CXX17_ATTRIBUTE_MAYBE_UNUSED
+#endif
+
+#ifdef FMT_HAS_CXX17_ATTRIBUTE_MAYBE_UNUSED
+// # define FMT_MAYBE_UNUSED [[maybe_unused]]
+# define FMT_MAYBE_UNUSED
+// g++/clang++ also support [[gnu::unused]]. However, we don't use it.
+#elif defined(__GNUC__)
+# define FMT_MAYBE_UNUSED __attribute__((unused))
+#else
+# define FMT_MAYBE_UNUSED
+#endif
+
+// Use the compiler's attribute noreturn
+#if defined(__MINGW32__) || defined(__MINGW64__)
+# define FMT_NORETURN __attribute__((noreturn))
+#elif FMT_HAS_CPP_ATTRIBUTE(noreturn) && __cplusplus >= 201103L
+# define FMT_NORETURN [[noreturn]]
+#else
+# define FMT_NORETURN
+#endif
+
+#ifndef FMT_USE_VARIADIC_TEMPLATES
+// Variadic templates are available in GCC since version 4.4
+// (http://gcc.gnu.org/projects/cxx0x.html) and in Visual C++
+// since version 2013.
+# define FMT_USE_VARIADIC_TEMPLATES \
+   (FMT_HAS_FEATURE(cxx_variadic_templates) || \
+       (FMT_GCC_VERSION >= 404 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1800)
+#endif
+
+#ifndef FMT_USE_RVALUE_REFERENCES
+// Don't use rvalue references when compiling with clang and an old libstdc++
+// as the latter doesn't provide std::move.
+# if defined(FMT_GNUC_LIBSTD_VERSION) && FMT_GNUC_LIBSTD_VERSION <= 402
+#  define FMT_USE_RVALUE_REFERENCES 0
+# else
+#  define FMT_USE_RVALUE_REFERENCES \
+    (FMT_HAS_FEATURE(cxx_rvalue_references) || \
+        (FMT_GCC_VERSION >= 403 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1600)
+# endif
+#endif
+
+#if __cplusplus >= 201103L || FMT_MSC_VER >= 1700
+# define FMT_USE_ALLOCATOR_TRAITS 1
+#else
+# define FMT_USE_ALLOCATOR_TRAITS 0
+#endif
+
+// Check if exceptions are disabled.
+#if defined(__GNUC__) && !defined(__EXCEPTIONS)
+# define FMT_EXCEPTIONS 0
+#endif
+#if FMT_MSC_VER && !_HAS_EXCEPTIONS
+# define FMT_EXCEPTIONS 0
+#endif
+#ifndef FMT_EXCEPTIONS
+# define FMT_EXCEPTIONS 1
+#endif
+
+#ifndef FMT_THROW
+# if FMT_EXCEPTIONS
+#  define FMT_THROW(x) throw x
+# else
+#  define FMT_THROW(x) assert(false)
+# endif
+#endif
+
+// Define FMT_USE_NOEXCEPT to make fmt use noexcept (C++11 feature).
+#ifndef FMT_USE_NOEXCEPT
+# define FMT_USE_NOEXCEPT 0
+#endif
+
+#if FMT_USE_NOEXCEPT || FMT_HAS_FEATURE(cxx_noexcept) || \
+    (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || \
+    FMT_MSC_VER >= 1900
+# define FMT_DETECTED_NOEXCEPT noexcept
+#else
+# define FMT_DETECTED_NOEXCEPT throw()
+#endif
+
+#ifndef FMT_NOEXCEPT
+# if FMT_EXCEPTIONS
+#  define FMT_NOEXCEPT FMT_DETECTED_NOEXCEPT
+# else
+#  define FMT_NOEXCEPT
+# endif
+#endif
+
+// This is needed because GCC still uses throw() in its headers when exceptions
+// are disabled.
+#if FMT_GCC_VERSION
+# define FMT_DTOR_NOEXCEPT FMT_DETECTED_NOEXCEPT
+#else
+# define FMT_DTOR_NOEXCEPT FMT_NOEXCEPT
+#endif
+
+#ifndef FMT_OVERRIDE
+# if (defined(FMT_USE_OVERRIDE) && FMT_USE_OVERRIDE) || FMT_HAS_FEATURE(cxx_override) || \
+   (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || \
+   FMT_MSC_VER >= 1900
+#  define FMT_OVERRIDE override
+# else
+#  define FMT_OVERRIDE
+# endif
+#endif
+
+#ifndef FMT_NULL
+# if FMT_HAS_FEATURE(cxx_nullptr) || \
+   (FMT_GCC_VERSION >= 408 && FMT_HAS_GXX_CXX11) || \
+   FMT_MSC_VER >= 1600
+#  define FMT_NULL nullptr
+# else
+#  define FMT_NULL NULL
+# endif
+#endif
+
+// A macro to disallow the copy constructor and operator= functions
+// This should be used in the private: declarations for a class
+#ifndef FMT_USE_DELETED_FUNCTIONS
+# define FMT_USE_DELETED_FUNCTIONS 0
+#endif
+
+#if FMT_USE_DELETED_FUNCTIONS || FMT_HAS_FEATURE(cxx_deleted_functions) || \
+  (FMT_GCC_VERSION >= 404 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1800
+# define FMT_DELETED_OR_UNDEFINED  = delete
+# define FMT_DISALLOW_COPY_AND_ASSIGN(TypeName) \
+    TypeName(const TypeName&) = delete; \
+    TypeName& operator=(const TypeName&) = delete
+#else
+# define FMT_DELETED_OR_UNDEFINED
+# define FMT_DISALLOW_COPY_AND_ASSIGN(TypeName) \
+    TypeName(const TypeName&); \
+    TypeName& operator=(const TypeName&)
+#endif
+
+#ifndef FMT_USE_DEFAULTED_FUNCTIONS
+# define FMT_USE_DEFAULTED_FUNCTIONS 0
+#endif
+
+#ifndef FMT_DEFAULTED_COPY_CTOR
+# if FMT_USE_DEFAULTED_FUNCTIONS || FMT_HAS_FEATURE(cxx_defaulted_functions) || \
+   (FMT_GCC_VERSION >= 404 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1800
+#  define FMT_DEFAULTED_COPY_CTOR(TypeName) \
+    TypeName(const TypeName&) = default;
+# else
+#  define FMT_DEFAULTED_COPY_CTOR(TypeName)
+# endif
+#endif
+
+#ifndef FMT_USE_USER_DEFINED_LITERALS
+// All compilers which support UDLs also support variadic templates. This
+// makes the fmt::literals implementation easier. However, an explicit check
+// for variadic templates is added here just in case.
+// For Intel's compiler both it and the system gcc/msc must support UDLs.
+# if FMT_USE_VARIADIC_TEMPLATES && FMT_USE_RVALUE_REFERENCES && \
+   (FMT_HAS_FEATURE(cxx_user_literals) || \
+     (FMT_GCC_VERSION >= 407 && FMT_HAS_GXX_CXX11) || FMT_MSC_VER >= 1900) && \
+   (!defined(FMT_ICC_VERSION) || FMT_ICC_VERSION >= 1500)
+#  define FMT_USE_USER_DEFINED_LITERALS 1
+# else
+#  define FMT_USE_USER_DEFINED_LITERALS 0
+# endif
+#endif
+
+#ifndef FMT_USE_EXTERN_TEMPLATES
+# define FMT_USE_EXTERN_TEMPLATES \
+    (FMT_CLANG_VERSION >= 209 || (FMT_GCC_VERSION >= 303 && FMT_HAS_GXX_CXX11))
+#endif
+
+#ifdef FMT_HEADER_ONLY
+// If header only do not use extern templates.
+# undef FMT_USE_EXTERN_TEMPLATES
+# define FMT_USE_EXTERN_TEMPLATES 0
+#endif
+
+#ifndef FMT_ASSERT
+# define FMT_ASSERT(condition, message) assert((condition) && message)
+#endif
+
+// __builtin_clz is broken in clang with Microsoft CodeGen:
+// https://github.com/fmtlib/fmt/issues/519
+#ifndef _MSC_VER
+# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clz)
+#  define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
+# endif
+
+# if FMT_GCC_VERSION >= 400 || FMT_HAS_BUILTIN(__builtin_clzll)
+#  define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
+# endif
+#endif
+
+// Some compilers masquerade as both MSVC and GCC-likes or
+// otherwise support __builtin_clz and __builtin_clzll, so
+// only define FMT_BUILTIN_CLZ using the MSVC intrinsics
+// if the clz and clzll builtins are not available.
+#if FMT_MSC_VER && !defined(FMT_BUILTIN_CLZLL) && !defined(_MANAGED)
+# include <intrin.h>  // _BitScanReverse, _BitScanReverse64
+
+namespace fmt {
+namespace internal {
+// avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning
+# ifndef __clang__
+#  pragma intrinsic(_BitScanReverse)
+# endif
+inline uint32_t clz(uint32_t x) {
+  unsigned long r = 0;
+  _BitScanReverse(&r, x);
+
+  assert(x != 0);
+  // Static analysis complains about using uninitialized data
+  // "r", but the only way that can happen is if "x" is 0,
+  // which the callers guarantee to not happen.
+# pragma warning(suppress: 6102)
+  return 31 - r;
+}
+# define FMT_BUILTIN_CLZ(n) fmt::internal::clz(n)
+
+// avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning
+# if defined(_WIN64) && !defined(__clang__)
+#  pragma intrinsic(_BitScanReverse64)
+# endif
+
+inline uint32_t clzll(uint64_t x) {
+  unsigned long r = 0;
+# ifdef _WIN64
+  _BitScanReverse64(&r, x);
+# else
+  // Scan the high 32 bits.
+  if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32)))
+    return 63 - (r + 32);
+
+  // Scan the low 32 bits.
+  _BitScanReverse(&r, static_cast<uint32_t>(x));
+# endif
+
+  assert(x != 0);
+  // Static analysis complains about using uninitialized data
+  // "r", but the only way that can happen is if "x" is 0,
+  // which the callers guarantee to not happen.
+# pragma warning(suppress: 6102)
+  return 63 - r;
+}
+# define FMT_BUILTIN_CLZLL(n) fmt::internal::clzll(n)
+}
+}
+#endif
+
+namespace fmt {
+namespace internal {
+struct DummyInt {
+  int data[2];
+  operator int() const { return 0; }
+};
+typedef std::numeric_limits<fmt::internal::DummyInt> FPUtil;
+
+// Dummy implementations of system functions such as signbit and ecvt called
+// if the latter are not available.
+inline DummyInt signbit(...) { return DummyInt(); }
+inline DummyInt _ecvt_s(...) { return DummyInt(); }
+inline DummyInt isinf(...) { return DummyInt(); }
+inline DummyInt _finite(...) { return DummyInt(); }
+inline DummyInt isnan(...) { return DummyInt(); }
+inline DummyInt _isnan(...) { return DummyInt(); }
+
+// A helper function to suppress bogus "conditional expression is constant"
+// warnings.
+template <typename T>
+inline T const_check(T value) { return value; }
+}
+}  // namespace fmt
+
+namespace std {
+// Standard permits specialization of std::numeric_limits. This specialization
+// is used to resolve ambiguity between isinf and std::isinf in glibc:
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48891
+// and the same for isnan and signbit.
+template <>
+class numeric_limits<fmt::internal::DummyInt> :
+    public std::numeric_limits<int> {
+ public:
+  // Portable version of isinf.
+  template <typename T>
+  static bool isinfinity(T x) {
+    using namespace fmt::internal;
+    // The resolution "priority" is:
+    // isinf macro > std::isinf > ::isinf > fmt::internal::isinf
+    if (const_check(sizeof(isinf(x)) == sizeof(bool) ||
+                    sizeof(isinf(x)) == sizeof(int))) {
+      return isinf(x) != 0;
+    }
+    return !_finite(static_cast<double>(x));
+  }
+
+  // Portable version of isnan.
+  template <typename T>
+  static bool isnotanumber(T x) {
+    using namespace fmt::internal;
+    if (const_check(sizeof(isnan(x)) == sizeof(bool) ||
+                    sizeof(isnan(x)) == sizeof(int))) {
+      return isnan(x) != 0;
+    }
+    return _isnan(static_cast<double>(x)) != 0;
+  }
+
+  // Portable version of signbit.
+  static bool isnegative(double x) {
+    using namespace fmt::internal;
+    if (const_check(sizeof(signbit(x)) == sizeof(bool) ||
+                    sizeof(signbit(x)) == sizeof(int))) {
+      return signbit(x) != 0;
+    }
+    if (x < 0) return true;
+    if (!isnotanumber(x)) return false;
+    int dec = 0, sign = 0;
+    char buffer[2];  // The buffer size must be >= 2 or _ecvt_s will fail.
+    _ecvt_s(buffer, sizeof(buffer), x, 0, &dec, &sign);
+    return sign != 0;
+  }
+};
+}  // namespace std
+
+namespace fmt {
+
+// Fix the warning about long long on older versions of GCC
+// that don't support the diagnostic pragma.
+FMT_GCC_EXTENSION typedef long long LongLong;
+FMT_GCC_EXTENSION typedef unsigned long long ULongLong;
+
+#if FMT_USE_RVALUE_REFERENCES
+using std::move;
+#endif
+
+template <typename Char>
+class BasicWriter;
+
+typedef BasicWriter<char> Writer;
+typedef BasicWriter<wchar_t> WWriter;
+
+template <typename Char>
+class ArgFormatter;
+
+struct FormatSpec;
+
+template <typename Impl, typename Char, typename Spec = fmt::FormatSpec>
+class BasicPrintfArgFormatter;
+
+template <typename CharType,
+          typename ArgFormatter = fmt::ArgFormatter<CharType> >
+class BasicFormatter;
+
+/**
+  \rst
+  A string reference. It can be constructed from a C string or
+  ``std::basic_string``.
+
+  You can use one of the following typedefs for common character types:
+
+  +------------+-------------------------+
+  | Type       | Definition              |
+  +============+=========================+
+  | StringRef  | BasicStringRef<char>    |
+  +------------+-------------------------+
+  | WStringRef | BasicStringRef<wchar_t> |
+  +------------+-------------------------+
+
+  This class is most useful as a parameter type to allow passing
+  different types of strings to a function, for example::
+
+    template <typename... Args>
+    std::string format(StringRef format_str, const Args & ... args);
+
+    format("{}", 42);
+    format(std::string("{}"), 42);
+  \endrst
+ */
+template <typename Char>
+class BasicStringRef {
+ private:
+  const Char *data_;
+  std::size_t size_;
+
+ public:
+  /** Constructs a string reference object from a C string and a size. */
+  BasicStringRef(const Char *s, std::size_t size) : data_(s), size_(size) {}
+
+  /**
+    \rst
+    Constructs a string reference object from a C string computing
+    the size with ``std::char_traits<Char>::length``.
+    \endrst
+   */
+  BasicStringRef(const Char *s)
+    : data_(s), size_(std::char_traits<Char>::length(s)) {}
+
+  /**
+    \rst
+    Constructs a string reference from a ``std::basic_string`` object.
+    \endrst
+   */
+  template <typename Allocator>
+  BasicStringRef(
+      const std::basic_string<Char, std::char_traits<Char>, Allocator> &s)
+  : data_(s.c_str()), size_(s.size()) {}
+
+#if FMT_HAS_STRING_VIEW
+  /**
+    \rst
+    Constructs a string reference from a ``std::basic_string_view`` object.
+    \endrst
+   */
+  BasicStringRef(
+      const std::basic_string_view<Char, std::char_traits<Char>> &s)
+  : data_(s.data()), size_(s.size()) {}
+
+  /**
+   \rst
+   Converts a string reference to an ``std::string_view`` object.
+   \endrst
+  */
+  explicit operator std::basic_string_view<Char>() const FMT_NOEXCEPT {
+    return std::basic_string_view<Char>(data_, size_);
+  }
+#endif
+
+  /**
+    \rst
+    Converts a string reference to an ``std::string`` object.
+    \endrst
+   */
+  std::basic_string<Char> to_string() const {
+    return std::basic_string<Char>(data_, size_);
+  }
+
+  /** Returns a pointer to the string data. */
+  const Char *data() const { return data_; }
+
+  /** Returns the string size. */
+  std::size_t size() const { return size_; }
+
+  // Lexicographically compare this string reference to other.
+  int compare(BasicStringRef other) const {
+    std::size_t size = size_ < other.size_ ? size_ : other.size_;
+    int result = std::char_traits<Char>::compare(data_, other.data_, size);
+    if (result == 0)
+      result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
+    return result;
+  }
+
+  friend bool operator==(BasicStringRef lhs, BasicStringRef rhs) {
+    return lhs.compare(rhs) == 0;
+  }
+  friend bool operator!=(BasicStringRef lhs, BasicStringRef rhs) {
+    return lhs.compare(rhs) != 0;
+  }
+  friend bool operator<(BasicStringRef lhs, BasicStringRef rhs) {
+    return lhs.compare(rhs) < 0;
+  }
+  friend bool operator<=(BasicStringRef lhs, BasicStringRef rhs) {
+    return lhs.compare(rhs) <= 0;
+  }
+  friend bool operator>(BasicStringRef lhs, BasicStringRef rhs) {
+    return lhs.compare(rhs) > 0;
+  }
+  friend bool operator>=(BasicStringRef lhs, BasicStringRef rhs) {
+    return lhs.compare(rhs) >= 0;
+  }
+};
+
+typedef BasicStringRef<char> StringRef;
+typedef BasicStringRef<wchar_t> WStringRef;
+
+/**
+  \rst
+  A reference to a null terminated string. It can be constructed from a C
+  string or ``std::basic_string``.
+
+  You can use one of the following typedefs for common character types:
+
+  +-------------+--------------------------+
+  | Type        | Definition               |
+  +=============+==========================+
+  | CStringRef  | BasicCStringRef<char>    |
+  +-------------+--------------------------+
+  | WCStringRef | BasicCStringRef<wchar_t> |
+  +-------------+--------------------------+
+
+  This class is most useful as a parameter type to allow passing
+  different types of strings to a function, for example::
+
+    template <typename... Args>
+    std::string format(CStringRef format_str, const Args & ... args);
+
+    format("{}", 42);
+    format(std::string("{}"), 42);
+  \endrst
+ */
+template <typename Char>
+class BasicCStringRef {
+ private:
+  const Char *data_;
+
+ public:
+  /** Constructs a string reference object from a C string. */
+  BasicCStringRef(const Char *s) : data_(s) {}
+
+  /**
+    \rst
+    Constructs a string reference from a ``std::basic_string`` object.
+    \endrst
+   */
+  template <typename Allocator>
+  BasicCStringRef(
+      const std::basic_string<Char, std::char_traits<Char>, Allocator> &s)
+  : data_(s.c_str()) {}
+
+  /** Returns the pointer to a C string. */
+  const Char *c_str() const { return data_; }
+};
+
+typedef BasicCStringRef<char> CStringRef;
+typedef BasicCStringRef<wchar_t> WCStringRef;
+
+/** A formatting error such as invalid format string. */
+class FormatError : public std::runtime_error {
+ public:
+  explicit FormatError(CStringRef message)
+  : std::runtime_error(message.c_str()) {}
+  FormatError(const FormatError &ferr) : std::runtime_error(ferr) {}
+  FMT_API ~FormatError() FMT_DTOR_NOEXCEPT FMT_OVERRIDE;
+};
+
+namespace internal {
+
+// MakeUnsigned<T>::Type gives an unsigned type corresponding to integer type T.
+template <typename T>
+struct MakeUnsigned { typedef T Type; };
+
+#define FMT_SPECIALIZE_MAKE_UNSIGNED(T, U) \
+  template <> \
+  struct MakeUnsigned<T> { typedef U Type; }
+
+FMT_SPECIALIZE_MAKE_UNSIGNED(char, unsigned char);
+FMT_SPECIALIZE_MAKE_UNSIGNED(signed char, unsigned char);
+FMT_SPECIALIZE_MAKE_UNSIGNED(short, unsigned short);
+FMT_SPECIALIZE_MAKE_UNSIGNED(int, unsigned);
+FMT_SPECIALIZE_MAKE_UNSIGNED(long, unsigned long);
+FMT_SPECIALIZE_MAKE_UNSIGNED(LongLong, ULongLong);
+
+// Casts nonnegative integer to unsigned.
+template <typename Int>
+inline typename MakeUnsigned<Int>::Type to_unsigned(Int value) {
+  FMT_ASSERT(value >= 0, "negative value");
+  return static_cast<typename MakeUnsigned<Int>::Type>(value);
+}
+
+// The number of characters to store in the MemoryBuffer object itself
+// to avoid dynamic memory allocation.
+enum { INLINE_BUFFER_SIZE = 500 };
+
+#if FMT_SECURE_SCL
+// Use checked iterator to avoid warnings on MSVC.
+template <typename T>
+inline stdext::checked_array_iterator<T*> make_ptr(T *ptr, std::size_t size) {
+  return stdext::checked_array_iterator<T*>(ptr, size);
+}
+#else
+template <typename T>
+inline T *make_ptr(T *ptr, std::size_t) { return ptr; }
+#endif
+}  // namespace internal
+
+/**
+  \rst
+  A buffer supporting a subset of ``std::vector``'s operations.
+  \endrst
+ */
+template <typename T>
+class Buffer {
+ private:
+  FMT_DISALLOW_COPY_AND_ASSIGN(Buffer);
+
+ protected:
+  T *ptr_;
+  std::size_t size_;
+  std::size_t capacity_;
+
+  Buffer(T *ptr = FMT_NULL, std::size_t capacity = 0)
+    : ptr_(ptr), size_(0), capacity_(capacity) {}
+
+  /**
+    \rst
+    Increases the buffer capacity to hold at least *size* elements updating
+    ``ptr_`` and ``capacity_``.
+    \endrst
+   */
+  virtual void grow(std::size_t size) = 0;
+
+ public:
+  virtual ~Buffer() {}
+
+  /** Returns the size of this buffer. */
+  std::size_t size() const { return size_; }
+
+  /** Returns the capacity of this buffer. */
+  std::size_t capacity() const { return capacity_; }
+
+  /**
+    Resizes the buffer. If T is a POD type new elements may not be initialized.
+   */
+  void resize(std::size_t new_size) {
+    if (new_size > capacity_)
+      grow(new_size);
+    size_ = new_size;
+  }
+
+  /**
+    \rst
+    Reserves space to store at least *capacity* elements.
+    \endrst
+   */
+  void reserve(std::size_t capacity) {
+    if (capacity > capacity_)
+      grow(capacity);
+  }
+
+  void clear() FMT_NOEXCEPT { size_ = 0; }
+
+  void push_back(const T &value) {
+    if (size_ == capacity_)
+      grow(size_ + 1);
+    ptr_[size_++] = value;
+  }
+
+  /** Appends data to the end of the buffer. */
+  template <typename U>
+  void append(const U *begin, const U *end);
+
+  T &operator[](std::size_t index) { return ptr_[index]; }
+  const T &operator[](std::size_t index) const { return ptr_[index]; }
+};
+
+template <typename T>
+template <typename U>
+void Buffer<T>::append(const U *begin, const U *end) {
+  FMT_ASSERT(end >= begin, "negative value");
+  std::size_t new_size = size_ + static_cast<std::size_t>(end - begin);
+  if (new_size > capacity_)
+    grow(new_size);
+  std::uninitialized_copy(begin, end,
+                          internal::make_ptr(ptr_, capacity_) + size_);
+  size_ = new_size;
+}
+
+namespace internal {
+
+// A memory buffer for trivially copyable/constructible types with the first
+// SIZE elements stored in the object itself.
+template <typename T, std::size_t SIZE, typename Allocator = std::allocator<T> >
+class MemoryBuffer : private Allocator, public Buffer<T> {
+ private:
+  T data_[SIZE];
+
+  // Deallocate memory allocated by the buffer.
+  void deallocate() {
+    if (this->ptr_ != data_) Allocator::deallocate(this->ptr_, this->capacity_);
+  }
+
+ protected:
+  void grow(std::size_t size) FMT_OVERRIDE;
+
+ public:
+  explicit MemoryBuffer(const Allocator &alloc = Allocator())
+      : Allocator(alloc), Buffer<T>(data_, SIZE) {}
+  ~MemoryBuffer() FMT_OVERRIDE { deallocate(); }
+
+#if FMT_USE_RVALUE_REFERENCES
+ private:
+  // Move data from other to this buffer.
+  void move(MemoryBuffer &other) {
+    Allocator &this_alloc = *this, &other_alloc = other;
+    this_alloc = std::move(other_alloc);
+    this->size_ = other.size_;
+    this->capacity_ = other.capacity_;
+    if (other.ptr_ == other.data_) {
+      this->ptr_ = data_;
+      std::uninitialized_copy(other.data_, other.data_ + this->size_,
+                              make_ptr(data_, this->capacity_));
+    } else {
+      this->ptr_ = other.ptr_;
+      // Set pointer to the inline array so that delete is not called
+      // when deallocating.
+      other.ptr_ = other.data_;
+    }
+  }
+
+ public:
+  MemoryBuffer(MemoryBuffer &&other) {
+    move(other);
+  }
+
+  MemoryBuffer &operator=(MemoryBuffer &&other) {
+    assert(this != &other);
+    deallocate();
+    move(other);
+    return *this;
+  }
+#endif
+
+  // Returns a copy of the allocator associated with this buffer.
+  Allocator get_allocator() const { return *this; }
+};
+
+template <typename T, std::size_t SIZE, typename Allocator>
+void MemoryBuffer<T, SIZE, Allocator>::grow(std::size_t size) {
+  std::size_t new_capacity = this->capacity_ + this->capacity_ / 2;
+  if (size > new_capacity)
+      new_capacity = size;
+#if FMT_USE_ALLOCATOR_TRAITS
+  T *new_ptr =
+      std::allocator_traits<Allocator>::allocate(*this, new_capacity, FMT_NULL);
+#else
+  T *new_ptr = this->allocate(new_capacity, FMT_NULL);
+#endif
+  // The following code doesn't throw, so the raw pointer above doesn't leak.
+  std::uninitialized_copy(this->ptr_, this->ptr_ + this->size_,
+                          make_ptr(new_ptr, new_capacity));
+  std::size_t old_capacity = this->capacity_;
+  T *old_ptr = this->ptr_;
+  this->capacity_ = new_capacity;
+  this->ptr_ = new_ptr;
+  // deallocate may throw (at least in principle), but it doesn't matter since
+  // the buffer already uses the new storage and will deallocate it in case
+  // of exception.
+  if (old_ptr != data_)
+    Allocator::deallocate(old_ptr, old_capacity);
+}
+
+// A fixed-size buffer.
+template <typename Char>
+class FixedBuffer : public fmt::Buffer<Char> {
+ public:
+  FixedBuffer(Char *array, std::size_t size) : fmt::Buffer<Char>(array, size) {}
+
+ protected:
+  FMT_API void grow(std::size_t size) FMT_OVERRIDE;
+};
+
+template <typename Char>
+class BasicCharTraits {
+ public:
+#if FMT_SECURE_SCL
+  typedef stdext::checked_array_iterator<Char*> CharPtr;
+#else
+  typedef Char *CharPtr;
+#endif
+  static Char cast(int value) { return static_cast<Char>(value); }
+};
+
+template <typename Char>
+class CharTraits;
+
+template <>
+class CharTraits<char> : public BasicCharTraits<char> {
+ private:
+  // Conversion from wchar_t to char is not allowed.
+  static char convert(wchar_t);
+
+ public:
+  static char convert(char value) { return value; }
+
+  // Formats a floating-point number.
+  template <typename T>
+  FMT_API static int format_float(char *buffer, std::size_t size,
+      const char *format, unsigned width, int precision, T value);
+};
+
+#if FMT_USE_EXTERN_TEMPLATES
+extern template int CharTraits<char>::format_float<double>
+        (char *buffer, std::size_t size,
+         const char* format, unsigned width, int precision, double value);
+extern template int CharTraits<char>::format_float<long double>
+        (char *buffer, std::size_t size,
+         const char* format, unsigned width, int precision, long double value);
+#endif
+
+template <>
+class CharTraits<wchar_t> : public BasicCharTraits<wchar_t> {
+ public:
+  static wchar_t convert(char value) { return value; }
+  static wchar_t convert(wchar_t value) { return value; }
+
+  template <typename T>
+  FMT_API static int format_float(wchar_t *buffer, std::size_t size,
+      const wchar_t *format, unsigned width, int precision, T value);
+};
+
+#if FMT_USE_EXTERN_TEMPLATES
+extern template int CharTraits<wchar_t>::format_float<double>
+        (wchar_t *buffer, std::size_t size,
+         const wchar_t* format, unsigned width, int precision, double value);
+extern template int CharTraits<wchar_t>::format_float<long double>
+        (wchar_t *buffer, std::size_t size,
+         const wchar_t* format, unsigned width, int precision, long double value);
+#endif
+
+// Checks if a number is negative - used to avoid warnings.
+template <bool IsSigned>
+struct SignChecker {
+  template <typename T>
+  static bool is_negative(T value) { return value < 0; }
+};
+
+template <>
+struct SignChecker<false> {
+  template <typename T>
+  static bool is_negative(T) { return false; }
+};
+
+// Returns true if value is negative, false otherwise.
+// Same as (value < 0) but doesn't produce warnings if T is an unsigned type.
+template <typename T>
+inline bool is_negative(T value) {
+  return SignChecker<std::numeric_limits<T>::is_signed>::is_negative(value);
+}
+
+// Selects uint32_t if FitsIn32Bits is true, uint64_t otherwise.
+template <bool FitsIn32Bits>
+struct TypeSelector { typedef uint32_t Type; };
+
+template <>
+struct TypeSelector<false> { typedef uint64_t Type; };
+
+template <typename T>
+struct IntTraits {
+  // Smallest of uint32_t and uint64_t that is large enough to represent
+  // all values of T.
+  typedef typename
+    TypeSelector<std::numeric_limits<T>::digits <= 32>::Type MainType;
+};
+
+FMT_API FMT_NORETURN void report_unknown_type(char code, const char *type);
+
+// Static data is placed in this class template to allow header-only
+// configuration.
+template <typename T = void>
+struct FMT_API BasicData {
+  static const uint32_t POWERS_OF_10_32[];
+  static const uint64_t POWERS_OF_10_64[];
+  static const char DIGITS[];
+};
+
+#if FMT_USE_EXTERN_TEMPLATES
+extern template struct BasicData<void>;
+#endif
+
+typedef BasicData<> Data;
+
+#ifdef FMT_BUILTIN_CLZLL
+// Returns the number of decimal digits in n. Leading zeros are not counted
+// except for n == 0 in which case count_digits returns 1.
+inline unsigned count_digits(uint64_t n) {
+  // Based on http://graphics.stanford.edu/~seander/bithacks.html#IntegerLog10
+  // and the benchmark https://github.com/localvoid/cxx-benchmark-count-digits.
+  int t = (64 - FMT_BUILTIN_CLZLL(n | 1)) * 1233 >> 12;
+  return to_unsigned(t) - (n < Data::POWERS_OF_10_64[t]) + 1;
+}
+#else
+// Fallback version of count_digits used when __builtin_clz is not available.
+inline unsigned count_digits(uint64_t n) {
+  unsigned count = 1;
+  for (;;) {
+    // Integer division is slow so do it for a group of four digits instead
+    // of for every digit. The idea comes from the talk by Alexandrescu
+    // "Three Optimization Tips for C++". See speed-test for a comparison.
+    if (n < 10) return count;
+    if (n < 100) return count + 1;
+    if (n < 1000) return count + 2;
+    if (n < 10000) return count + 3;
+    n /= 10000u;
+    count += 4;
+  }
+}
+#endif
+
+#ifdef FMT_BUILTIN_CLZ
+// Optional version of count_digits for better performance on 32-bit platforms.
+inline unsigned count_digits(uint32_t n) {
+  int t = (32 - FMT_BUILTIN_CLZ(n | 1)) * 1233 >> 12;
+  return to_unsigned(t) - (n < Data::POWERS_OF_10_32[t]) + 1;
+}
+#endif
+
+// A functor that doesn't add a thousands separator.
+struct NoThousandsSep {
+  template <typename Char>
+  void operator()(Char *) {}
+};
+
+// A functor that adds a thousands separator.
+class ThousandsSep {
+ private:
+  fmt::StringRef sep_;
+
+  // Index of a decimal digit with the least significant digit having index 0.
+  unsigned digit_index_;
+
+ public:
+  explicit ThousandsSep(fmt::StringRef sep) : sep_(sep), digit_index_(0) {}
+
+  template <typename Char>
+  void operator()(Char *&buffer) {
+    if (++digit_index_ % 3 != 0)
+      return;
+    buffer -= sep_.size();
+    std::uninitialized_copy(sep_.data(), sep_.data() + sep_.size(),
+                            internal::make_ptr(buffer, sep_.size()));
+  }
+};
+
+// Formats a decimal unsigned integer value writing into buffer.
+// thousands_sep is a functor that is called after writing each char to
+// add a thousands separator if necessary.
+template <typename UInt, typename Char, typename ThousandsSep>
+inline void format_decimal(Char *buffer, UInt value, unsigned num_digits,
+                           ThousandsSep thousands_sep) {
+  buffer += num_digits;
+  while (value >= 100) {
+    // Integer division is slow so do it for a group of two digits instead
+    // of for every digit. The idea comes from the talk by Alexandrescu
+    // "Three Optimization Tips for C++". See speed-test for a comparison.
+    unsigned index = static_cast<unsigned>((value % 100) * 2);
+    value /= 100;
+    *--buffer = Data::DIGITS[index + 1];
+    thousands_sep(buffer);
+    *--buffer = Data::DIGITS[index];
+    thousands_sep(buffer);
+  }
+  if (value < 10) {
+    *--buffer = static_cast<char>('0' + value);
+    return;
+  }
+  unsigned index = static_cast<unsigned>(value * 2);
+  *--buffer = Data::DIGITS[index + 1];
+  thousands_sep(buffer);
+  *--buffer = Data::DIGITS[index];
+}
+
+template <typename UInt, typename Char>
+inline void format_decimal(Char *buffer, UInt value, unsigned num_digits) {
+  format_decimal(buffer, value, num_digits, NoThousandsSep());
+  return;
+}
+
+#ifndef _WIN32
+# define FMT_USE_WINDOWS_H 0
+#elif !defined(FMT_USE_WINDOWS_H)
+# define FMT_USE_WINDOWS_H 1
+#endif
+
+// Define FMT_USE_WINDOWS_H to 0 to disable use of windows.h.
+// All the functionality that relies on it will be disabled too.
+#if FMT_USE_WINDOWS_H
+// A converter from UTF-8 to UTF-16.
+// It is only provided for Windows since other systems support UTF-8 natively.
+class UTF8ToUTF16 {
+ private:
+  MemoryBuffer<wchar_t, INLINE_BUFFER_SIZE> buffer_;
+
+ public:
+  FMT_API explicit UTF8ToUTF16(StringRef s);
+  operator WStringRef() const { return WStringRef(&buffer_[0], size()); }
+  size_t size() const { return buffer_.size() - 1; }
+  const wchar_t *c_str() const { return &buffer_[0]; }
+  std::wstring str() const { return std::wstring(&buffer_[0], size()); }
+};
+
+// A converter from UTF-16 to UTF-8.
+// It is only provided for Windows since other systems support UTF-8 natively.
+class UTF16ToUTF8 {
+ private:
+  MemoryBuffer<char, INLINE_BUFFER_SIZE> buffer_;
+
+ public:
+  UTF16ToUTF8() {}
+  FMT_API explicit UTF16ToUTF8(WStringRef s);
+  operator StringRef() const { return StringRef(&buffer_[0], size()); }
+  size_t size() const { return buffer_.size() - 1; }
+  const char *c_str() const { return &buffer_[0]; }
+  std::string str() const { return std::string(&buffer_[0], size()); }
+
+  // Performs conversion returning a system error code instead of
+  // throwing exception on conversion error. This method may still throw
+  // in case of memory allocation error.
+  FMT_API int convert(WStringRef s);
+};
+
+FMT_API void format_windows_error(fmt::Writer &out, int error_code,
+                                  fmt::StringRef message) FMT_NOEXCEPT;
+#endif
+
+// A formatting argument value.
+struct Value {
+  template <typename Char>
+  struct StringValue {
+    const Char *value;
+    std::size_t size;
+  };
+
+  typedef void (*FormatFunc)(
+      void *formatter, const void *arg, void *format_str_ptr);
+
+  struct CustomValue {
+    const void *value;
+    FormatFunc format;
+  };
+
+  union {
+    int int_value;
+    unsigned uint_value;
+    LongLong long_long_value;
+    ULongLong ulong_long_value;
+    double double_value;
+    long double long_double_value;
+    const void *pointer;
+    StringValue<char> string;
+    StringValue<signed char> sstring;
+    StringValue<unsigned char> ustring;
+    StringValue<wchar_t> wstring;
+    CustomValue custom;
+  };
+
+  enum Type {
+    NONE, NAMED_ARG,
+    // Integer types should go first,
+    INT, UINT, LONG_LONG, ULONG_LONG, BOOL, CHAR, LAST_INTEGER_TYPE = CHAR,
+    // followed by floating-point types.
+    DOUBLE, LONG_DOUBLE, LAST_NUMERIC_TYPE = LONG_DOUBLE,
+    CSTRING, STRING, WSTRING, POINTER, CUSTOM
+  };
+};
+
+// A formatting argument. It is a trivially copyable/constructible type to
+// allow storage in internal::MemoryBuffer.
+struct Arg : Value {
+  Type type;
+};
+
+template <typename Char>
+struct NamedArg;
+template <typename Char, typename T>
+struct NamedArgWithType;
+
+template <typename T = void>
+struct Null {};
+
+// A helper class template to enable or disable overloads taking wide
+// characters and strings in MakeValue.
+template <typename T, typename Char>
+struct WCharHelper {
+  typedef Null<T> Supported;
+  typedef T Unsupported;
+};
+
+template <typename T>
+struct WCharHelper<T, wchar_t> {
+  typedef T Supported;
+  typedef Null<T> Unsupported;
+};
+
+typedef char Yes[1];
+typedef char No[2];
+
+template <typename T>
+T &get();
+
+// These are non-members to workaround an overload resolution bug in bcc32.
+Yes &convert(fmt::ULongLong);
+No &convert(...);
+
+template <typename T, bool ENABLE_CONVERSION>
+struct ConvertToIntImpl {
+  enum { value = ENABLE_CONVERSION };
+};
+
+template <typename T, bool ENABLE_CONVERSION>
+struct ConvertToIntImpl2 {
+  enum { value = false };
+};
+
+template <typename T>
+struct ConvertToIntImpl2<T, true> {
+  enum {
+    // Don't convert numeric types.
+    value = ConvertToIntImpl<T, !std::numeric_limits<T>::is_specialized>::value
+  };
+};
+
+template <typename T>
+struct ConvertToInt {
+  enum {
+    enable_conversion = sizeof(fmt::internal::convert(get<T>())) == sizeof(Yes)
+  };
+  enum { value = ConvertToIntImpl2<T, enable_conversion>::value };
+};
+
+#define FMT_DISABLE_CONVERSION_TO_INT(Type) \
+  template <> \
+  struct ConvertToInt<Type> {  enum { value = 0 }; }
+
+// Silence warnings about convering float to int.
+FMT_DISABLE_CONVERSION_TO_INT(float);
+FMT_DISABLE_CONVERSION_TO_INT(double);
+FMT_DISABLE_CONVERSION_TO_INT(long double);
+
+template <bool B, class T = void>
+struct EnableIf {};
+
+template <class T>
+struct EnableIf<true, T> { typedef T type; };
+
+template <bool B, class T, class F>
+struct Conditional { typedef T type; };
+
+template <class T, class F>
+struct Conditional<false, T, F> { typedef F type; };
+
+// For bcc32 which doesn't understand ! in template arguments.
+template <bool>
+struct Not { enum { value = 0 }; };
+
+template <>
+struct Not<false> { enum { value = 1 }; };
+
+template <typename T>
+struct FalseType { enum { value = 0 }; };
+
+template <typename T, T> struct LConvCheck {
+  LConvCheck(int) {}
+};
+
+// Returns the thousands separator for the current locale.
+// We check if ``lconv`` contains ``thousands_sep`` because on Android
+// ``lconv`` is stubbed as an empty struct.
+template <typename LConv>
+inline StringRef thousands_sep(
+    LConv *lc, LConvCheck<char *LConv::*, &LConv::thousands_sep> = 0) {
+  return lc->thousands_sep;
+}
+
+inline fmt::StringRef thousands_sep(...) { return ""; }
+
+#define FMT_CONCAT(a, b) a##b
+
+#if FMT_GCC_VERSION >= 303
+# define FMT_UNUSED __attribute__((unused))
+#else
+# define FMT_UNUSED
+#endif
+
+#ifndef FMT_USE_STATIC_ASSERT
+# define FMT_USE_STATIC_ASSERT 0
+#endif
+
+#if FMT_USE_STATIC_ASSERT || FMT_HAS_FEATURE(cxx_static_assert) || \
+  (FMT_GCC_VERSION >= 403 && FMT_HAS_GXX_CXX11) || _MSC_VER >= 1600
+# define FMT_STATIC_ASSERT(cond, message) static_assert(cond, message)
+#else
+# define FMT_CONCAT_(a, b) FMT_CONCAT(a, b)
+# define FMT_STATIC_ASSERT(cond, message) \
+  typedef int FMT_CONCAT_(Assert, __LINE__)[(cond) ? 1 : -1] FMT_UNUSED
+#endif
+
+template <typename Formatter>
+void format_arg(Formatter&, ...) {
+  FMT_STATIC_ASSERT(FalseType<Formatter>::value,
+                    "Cannot format argument. To enable the use of ostream "
+                    "operator<< include fmt/ostream.h. Otherwise provide "
+                    "an overload of format_arg.");
+}
+
+// Makes an Arg object from any type.
+template <typename Formatter>
+class MakeValue : public Arg {
+ public:
+  typedef typename Formatter::Char Char;
+
+ private:
+  // The following two methods are private to disallow formatting of
+  // arbitrary pointers. If you want to output a pointer cast it to
+  // "void *" or "const void *". In particular, this forbids formatting
+  // of "[const] volatile char *" which is printed as bool by iostreams.
+  // Do not implement!
+  template <typename T>
+  MakeValue(const T *value);
+  template <typename T>
+  MakeValue(T *value);
+
+  // The following methods are private to disallow formatting of wide
+  // characters and strings into narrow strings as in
+  //   fmt::format("{}", L"test");
+  // To fix this, use a wide format string: fmt::format(L"{}", L"test").
+#if !FMT_MSC_VER || defined(_NATIVE_WCHAR_T_DEFINED)
+  MakeValue(typename WCharHelper<wchar_t, Char>::Unsupported);
+#endif
+  MakeValue(typename WCharHelper<wchar_t *, Char>::Unsupported);
+  MakeValue(typename WCharHelper<const wchar_t *, Char>::Unsupported);
+  MakeValue(typename WCharHelper<const std::wstring &, Char>::Unsupported);
+#if FMT_HAS_STRING_VIEW
+  MakeValue(typename WCharHelper<const std::wstring_view &, Char>::Unsupported);
+#endif
+  MakeValue(typename WCharHelper<WStringRef, Char>::Unsupported);
+
+  void set_string(StringRef str) {
+    string.value = str.data();
+    string.size = str.size();
+  }
+
+  void set_string(WStringRef str) {
+    wstring.value = str.data();
+    wstring.size = str.size();
+  }
+
+  // Formats an argument of a custom type, such as a user-defined class.
+  template <typename T>
+  static void format_custom_arg(
+      void *formatter, const void *arg, void *format_str_ptr) {
+    format_arg(*static_cast<Formatter*>(formatter),
+               *static_cast<const Char**>(format_str_ptr),
+               *static_cast<const T*>(arg));
+  }
+
+ public:
+  MakeValue() {}
+
+#define FMT_MAKE_VALUE_(Type, field, TYPE, rhs) \
+  MakeValue(Type value) { field = rhs; } \
+  static uint64_t type(Type) { return Arg::TYPE; }
+
+#define FMT_MAKE_VALUE(Type, field, TYPE) \
+  FMT_MAKE_VALUE_(Type, field, TYPE, value)
+
+  FMT_MAKE_VALUE(bool, int_value, BOOL)
+  FMT_MAKE_VALUE(short, int_value, INT)
+  FMT_MAKE_VALUE(unsigned short, uint_value, UINT)
+  FMT_MAKE_VALUE(int, int_value, INT)
+  FMT_MAKE_VALUE(unsigned, uint_value, UINT)
+
+  MakeValue(long value) {
+    // To minimize the number of types we need to deal with, long is
+    // translated either to int or to long long depending on its size.
+    if (const_check(sizeof(long) == sizeof(int)))
+      int_value = static_cast<int>(value);
+    else
+      long_long_value = value;
+  }
+  static uint64_t type(long) {
+    return sizeof(long) == sizeof(int) ? Arg::INT : Arg::LONG_LONG;
+  }
+
+  MakeValue(unsigned long value) {
+    if (const_check(sizeof(unsigned long) == sizeof(unsigned)))
+      uint_value = static_cast<unsigned>(value);
+    else
+      ulong_long_value = value;
+  }
+  static uint64_t type(unsigned long) {
+    return sizeof(unsigned long) == sizeof(unsigned) ?
+          Arg::UINT : Arg::ULONG_LONG;
+  }
+
+  FMT_MAKE_VALUE(LongLong, long_long_value, LONG_LONG)
+  FMT_MAKE_VALUE(ULongLong, ulong_long_value, ULONG_LONG)
+  FMT_MAKE_VALUE(float, double_value, DOUBLE)
+  FMT_MAKE_VALUE(double, double_value, DOUBLE)
+  FMT_MAKE_VALUE(long double, long_double_value, LONG_DOUBLE)
+  FMT_MAKE_VALUE(signed char, int_value, INT)
+  FMT_MAKE_VALUE(unsigned char, uint_value, UINT)
+  FMT_MAKE_VALUE(char, int_value, CHAR)
+
+#if __cplusplus >= 201103L
+  template <
+    typename T,
+    typename = typename std::enable_if<
+      std::is_enum<T>::value && ConvertToInt<T>::value>::type>
+   MakeValue(T value) { int_value = value; }
+
+  template <
+    typename T,
+    typename = typename std::enable_if<
+      std::is_enum<T>::value && ConvertToInt<T>::value>::type>
+  static uint64_t type(T) { return Arg::INT; }
+#endif
+
+#if !defined(_MSC_VER) || defined(_NATIVE_WCHAR_T_DEFINED)
+  MakeValue(typename WCharHelper<wchar_t, Char>::Supported value) {
+    int_value = value;
+  }
+  static uint64_t type(wchar_t) { return Arg::CHAR; }
+#endif
+
+#define FMT_MAKE_STR_VALUE(Type, TYPE) \
+  MakeValue(Type value) { set_string(value); } \
+  static uint64_t type(Type) { return Arg::TYPE; }
+
+  FMT_MAKE_VALUE(char *, string.value, CSTRING)
+  FMT_MAKE_VALUE(const char *, string.value, CSTRING)
+  FMT_MAKE_VALUE(signed char *, sstring.value, CSTRING)
+  FMT_MAKE_VALUE(const signed char *, sstring.value, CSTRING)
+  FMT_MAKE_VALUE(unsigned char *, ustring.value, CSTRING)
+  FMT_MAKE_VALUE(const unsigned char *, ustring.value, CSTRING)
+  FMT_MAKE_STR_VALUE(const std::string &, STRING)
+#if FMT_HAS_STRING_VIEW
+  FMT_MAKE_STR_VALUE(const std::string_view &, STRING)
+#endif
+  FMT_MAKE_STR_VALUE(StringRef, STRING)
+  FMT_MAKE_VALUE_(CStringRef, string.value, CSTRING, value.c_str())
+
+#define FMT_MAKE_WSTR_VALUE(Type, TYPE) \
+  MakeValue(typename WCharHelper<Type, Char>::Supported value) { \
+    set_string(value); \
+  } \
+  static uint64_t type(Type) { return Arg::TYPE; }
+
+  FMT_MAKE_WSTR_VALUE(wchar_t *, WSTRING)
+  FMT_MAKE_WSTR_VALUE(const wchar_t *, WSTRING)
+  FMT_MAKE_WSTR_VALUE(const std::wstring &, WSTRING)
+#if FMT_HAS_STRING_VIEW
+  FMT_MAKE_WSTR_VALUE(const std::wstring_view &, WSTRING)
+#endif
+  FMT_MAKE_WSTR_VALUE(WStringRef, WSTRING)
+
+  FMT_MAKE_VALUE(void *, pointer, POINTER)
+  FMT_MAKE_VALUE(const void *, pointer, POINTER)
+
+  template <typename T>
+  MakeValue(const T &value,
+            typename EnableIf<Not<
+              ConvertToInt<T>::value>::value, int>::type = 0) {
+    custom.value = &value;
+    custom.format = &format_custom_arg<T>;
+  }
+
+  template <typename T>
+  static typename EnableIf<Not<ConvertToInt<T>::value>::value, uint64_t>::type
+      type(const T &) {
+    return Arg::CUSTOM;
+  }
+
+  // Additional template param `Char_` is needed here because make_type always
+  // uses char.
+  template <typename Char_>
+  MakeValue(const NamedArg<Char_> &value) { pointer = &value; }
+  template <typename Char_, typename T>
+  MakeValue(const NamedArgWithType<Char_, T> &value) { pointer = &value; }
+
+  template <typename Char_>
+  static uint64_t type(const NamedArg<Char_> &) { return Arg::NAMED_ARG; }
+  template <typename Char_, typename T>
+  static uint64_t type(const NamedArgWithType<Char_, T> &) { return Arg::NAMED_ARG; }
+};
+
+template <typename Formatter>
+class MakeArg : public Arg {
+public:
+  MakeArg() {
+    type = Arg::NONE;
+  }
+
+  template <typename T>
+  MakeArg(const T &value)
+  : Arg(MakeValue<Formatter>(value)) {
+    type = static_cast<Arg::Type>(MakeValue<Formatter>::type(value));
+  }
+};
+
+template <typename Char>
+struct NamedArg : Arg {
+  BasicStringRef<Char> name;
+
+  template <typename T>
+  NamedArg(BasicStringRef<Char> argname, const T &value)
+  : Arg(MakeArg< BasicFormatter<Char> >(value)), name(argname) {}
+};
+
+template <typename Char, typename T>
+struct NamedArgWithType : NamedArg<Char> {
+  NamedArgWithType(BasicStringRef<Char> argname, const T &value)
+  : NamedArg<Char>(argname, value) {}
+};
+
+class RuntimeError : public std::runtime_error {
+ protected:
+  RuntimeError() : std::runtime_error("") {}
+  RuntimeError(const RuntimeError &rerr) : std::runtime_error(rerr) {}
+  FMT_API ~RuntimeError() FMT_DTOR_NOEXCEPT FMT_OVERRIDE;
+};
+
+template <typename Char>
+class ArgMap;
+}  // namespace internal
+
+/** An argument list. */
+class ArgList {
+ private:
+  // To reduce compiled code size per formatting function call, types of first
+  // MAX_PACKED_ARGS arguments are passed in the types_ field.
+  uint64_t types_;
+  union {
+    // If the number of arguments is less than MAX_PACKED_ARGS, the argument
+    // values are stored in values_, otherwise they are stored in args_.
+    // This is done to reduce compiled code size as storing larger objects
+    // may require more code (at least on x86-64) even if the same amount of
+    // data is actually copied to stack. It saves ~10% on the bloat test.
+    const internal::Value *values_;
+    const internal::Arg *args_;
+  };
+
+  internal::Arg::Type type(unsigned index) const {
+    return type(types_, index);
+  }
+
+  template <typename Char>
+  friend class internal::ArgMap;
+
+ public:
+  // Maximum number of arguments with packed types.
+  enum { MAX_PACKED_ARGS = 16 };
+
+  ArgList() : types_(0) {}
+
+  ArgList(ULongLong types, const internal::Value *values)
+  : types_(types), values_(values) {}
+  ArgList(ULongLong types, const internal::Arg *args)
+  : types_(types), args_(args) {}
+
+  uint64_t types() const { return types_; }
+
+  /** Returns the argument at specified index. */
+  internal::Arg operator[](unsigned index) const {
+    using internal::Arg;
+    Arg arg;
+    bool use_values = type(MAX_PACKED_ARGS - 1) == Arg::NONE;
+    if (index < MAX_PACKED_ARGS) {
+      Arg::Type arg_type = type(index);
+      internal::Value &val = arg;
+      if (arg_type != Arg::NONE)
+        val = use_values ? values_[index] : args_[index];
+      arg.type = arg_type;
+      return arg;
+    }
+    if (use_values) {
+      // The index is greater than the number of arguments that can be stored
+      // in values, so return a "none" argument.
+      arg.type = Arg::NONE;
+      return arg;
+    }
+    for (unsigned i = MAX_PACKED_ARGS; i <= index; ++i) {
+      if (args_[i].type == Arg::NONE)
+        return args_[i];
+    }
+    return args_[index];
+  }
+
+  static internal::Arg::Type type(uint64_t types, unsigned index) {
+    unsigned shift = index * 4;
+    uint64_t mask = 0xf;
+    return static_cast<internal::Arg::Type>(
+          (types & (mask << shift)) >> shift);
+  }
+};
+
+#define FMT_DISPATCH(call) static_cast<Impl*>(this)->call
+
+/**
+  \rst
+  An argument visitor based on the `curiously recurring template pattern
+  <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_.
+
+  To use `~fmt::ArgVisitor` define a subclass that implements some or all of the
+  visit methods with the same signatures as the methods in `~fmt::ArgVisitor`,
+  for example, `~fmt::ArgVisitor::visit_int()`.
+  Pass the subclass as the *Impl* template parameter. Then calling
+  `~fmt::ArgVisitor::visit` for some argument will dispatch to a visit method
+  specific to the argument type. For example, if the argument type is
+  ``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
+  will be called. If the subclass doesn't contain a method with this signature,
+  then a corresponding method of `~fmt::ArgVisitor` will be called.
+
+  **Example**::
+
+    class MyArgVisitor : public fmt::ArgVisitor<MyArgVisitor, void> {
+     public:
+      void visit_int(int value) { fmt::print("{}", value); }
+      void visit_double(double value) { fmt::print("{}", value ); }
+    };
+  \endrst
+ */
+template <typename Impl, typename Result>
+class ArgVisitor {
+ private:
+  typedef internal::Arg Arg;
+
+ public:
+  void report_unhandled_arg() {}
+
+  Result visit_unhandled_arg() {
+    FMT_DISPATCH(report_unhandled_arg());
+    return Result();
+  }
+
+  /** Visits an ``int`` argument. **/
+  Result visit_int(int value) {
+    return FMT_DISPATCH(visit_any_int(value));
+  }
+
+  /** Visits a ``long long`` argument. **/
+  Result visit_long_long(LongLong value) {
+    return FMT_DISPATCH(visit_any_int(value));
+  }
+
+  /** Visits an ``unsigned`` argument. **/
+  Result visit_uint(unsigned value) {
+    return FMT_DISPATCH(visit_any_int(value));
+  }
+
+  /** Visits an ``unsigned long long`` argument. **/
+  Result visit_ulong_long(ULongLong value) {
+    return FMT_DISPATCH(visit_any_int(value));
+  }
+
+  /** Visits a ``bool`` argument. **/
+  Result visit_bool(bool value) {
+    return FMT_DISPATCH(visit_any_int(value));
+  }
+
+  /** Visits a ``char`` or ``wchar_t`` argument. **/
+  Result visit_char(int value) {
+    return FMT_DISPATCH(visit_any_int(value));
+  }
+
+  /** Visits an argument of any integral type. **/
+  template <typename T>
+  Result visit_any_int(T) {
+    return FMT_DISPATCH(visit_unhandled_arg());
+  }
+
+  /** Visits a ``double`` argument. **/
+  Result visit_double(double value) {
+    return FMT_DISPATCH(visit_any_double(value));
+  }
+
+  /** Visits a ``long double`` argument. **/
+  Result visit_long_double(long double value) {
+    return FMT_DISPATCH(visit_any_double(value));
+  }
+
+  /** Visits a ``double`` or ``long double`` argument. **/
+  template <typename T>
+  Result visit_any_double(T) {
+    return FMT_DISPATCH(visit_unhandled_arg());
+  }
+
+  /** Visits a null-terminated C string (``const char *``) argument. **/
+  Result visit_cstring(const char *) {
+    return FMT_DISPATCH(visit_unhandled_arg());
+  }
+
+  /** Visits a string argument. **/
+  Result visit_string(Arg::StringValue<char>) {
+    return FMT_DISPATCH(visit_unhandled_arg());
+  }
+
+  /** Visits a wide string argument. **/
+  Result visit_wstring(Arg::StringValue<wchar_t>) {
+    return FMT_DISPATCH(visit_unhandled_arg());
+  }
+
+  /** Visits a pointer argument. **/
+  Result visit_pointer(const void *) {
+    return FMT_DISPATCH(visit_unhandled_arg());
+  }
+
+  /** Visits an argument of a custom (user-defined) type. **/
+  Result visit_custom(Arg::CustomValue) {
+    return FMT_DISPATCH(visit_unhandled_arg());
+  }
+
+  /**
+    \rst
+    Visits an argument dispatching to the appropriate visit method based on
+    the argument type. For example, if the argument type is ``double`` then
+    the `~fmt::ArgVisitor::visit_double()` method of the *Impl* class will be
+    called.
+    \endrst
+   */
+  Result visit(const Arg &arg) {
+    switch (arg.type) {
+    case Arg::NONE:
+    case Arg::NAMED_ARG:
+      FMT_ASSERT(false, "invalid argument type");
+      break;
+    case Arg::INT:
+      return FMT_DISPATCH(visit_int(arg.int_value));
+    case Arg::UINT:
+      return FMT_DISPATCH(visit_uint(arg.uint_value));
+    case Arg::LONG_LONG:
+      return FMT_DISPATCH(visit_long_long(arg.long_long_value));
+    case Arg::ULONG_LONG:
+      return FMT_DISPATCH(visit_ulong_long(arg.ulong_long_value));
+    case Arg::BOOL:
+      return FMT_DISPATCH(visit_bool(arg.int_value != 0));
+    case Arg::CHAR:
+      return FMT_DISPATCH(visit_char(arg.int_value));
+    case Arg::DOUBLE:
+      return FMT_DISPATCH(visit_double(arg.double_value));
+    case Arg::LONG_DOUBLE:
+      return FMT_DISPATCH(visit_long_double(arg.long_double_value));
+    case Arg::CSTRING:
+      return FMT_DISPATCH(visit_cstring(arg.string.value));
+    case Arg::STRING:
+      return FMT_DISPATCH(visit_string(arg.string));
+    case Arg::WSTRING:
+      return FMT_DISPATCH(visit_wstring(arg.wstring));
+    case Arg::POINTER:
+      return FMT_DISPATCH(visit_pointer(arg.pointer));
+    case Arg::CUSTOM:
+      return FMT_DISPATCH(visit_custom(arg.custom));
+    }
+    return Result();
+  }
+};
+
+enum Alignment {
+  ALIGN_DEFAULT, ALIGN_LEFT, ALIGN_RIGHT, ALIGN_CENTER, ALIGN_NUMERIC
+};
+
+// Flags.
+enum {
+  SIGN_FLAG = 1, PLUS_FLAG = 2, MINUS_FLAG = 4, HASH_FLAG = 8,
+  CHAR_FLAG = 0x10  // Argument has char type - used in error reporting.
+};
+
+// An empty format specifier.
+struct EmptySpec {};
+
+// A type specifier.
+template <char TYPE>
+struct TypeSpec : EmptySpec {
+  Alignment align() const { return ALIGN_DEFAULT; }
+  unsigned width() const { return 0; }
+  int precision() const { return -1; }
+  bool flag(unsigned) const { return false; }
+  char type() const { return TYPE; }
+  char type_prefix() const { return TYPE; }
+  char fill() const { return ' '; }
+};
+
+// A width specifier.
+struct WidthSpec {
+  unsigned width_;
+  // Fill is always wchar_t and cast to char if necessary to avoid having
+  // two specialization of WidthSpec and its subclasses.
+  wchar_t fill_;
+
+  WidthSpec(unsigned width, wchar_t fill) : width_(width), fill_(fill) {}
+
+  unsigned width() const { return width_; }
+  wchar_t fill() const { return fill_; }
+};
+
+// An alignment specifier.
+struct AlignSpec : WidthSpec {
+  Alignment align_;
+
+  AlignSpec(unsigned width, wchar_t fill, Alignment align = ALIGN_DEFAULT)
+  : WidthSpec(width, fill), align_(align) {}
+
+  Alignment align() const { return align_; }
+
+  int precision() const { return -1; }
+};
+
+// An alignment and type specifier.
+template <char TYPE>
+struct AlignTypeSpec : AlignSpec {
+  AlignTypeSpec(unsigned width, wchar_t fill) : AlignSpec(width, fill) {}
+
+  bool flag(unsigned) const { return false; }
+  char type() const { return TYPE; }
+  char type_prefix() const { return TYPE; }
+};
+
+// A full format specifier.
+struct FormatSpec : AlignSpec {
+  unsigned flags_;
+  int precision_;
+  char type_;
+
+  FormatSpec(
+    unsigned width = 0, char type = 0, wchar_t fill = ' ')
+  : AlignSpec(width, fill), flags_(0), precision_(-1), type_(type) {}
+
+  bool flag(unsigned f) const { return (flags_ & f) != 0; }
+  int precision() const { return precision_; }
+  char type() const { return type_; }
+  char type_prefix() const { return type_; }
+};
+
+// An integer format specifier.
+template <typename T, typename SpecT = TypeSpec<0>, typename Char = char>
+class IntFormatSpec : public SpecT {
+ private:
+  T value_;
+
+ public:
+  IntFormatSpec(T val, const SpecT &spec = SpecT())
+  : SpecT(spec), value_(val) {}
+
+  T value() const { return value_; }
+};
+
+// A string format specifier.
+template <typename Char>
+class StrFormatSpec : public AlignSpec {
+ private:
+  const Char *str_;
+
+ public:
+  template <typename FillChar>
+  StrFormatSpec(const Char *str, unsigned width, FillChar fill)
+  : AlignSpec(width, fill), str_(str) {
+    internal::CharTraits<Char>::convert(FillChar());
+  }
+
+  const Char *str() const { return str_; }
+};
+
+/**
+  Returns an integer format specifier to format the value in base 2.
+ */
+IntFormatSpec<int, TypeSpec<'b'> > bin(int value);
+
+/**
+  Returns an integer format specifier to format the value in base 8.
+ */
+IntFormatSpec<int, TypeSpec<'o'> > oct(int value);
+
+/**
+  Returns an integer format specifier to format the value in base 16 using
+  lower-case letters for the digits above 9.
+ */
+IntFormatSpec<int, TypeSpec<'x'> > hex(int value);
+
+/**
+  Returns an integer formatter format specifier to format in base 16 using
+  upper-case letters for the digits above 9.
+ */
+IntFormatSpec<int, TypeSpec<'X'> > hexu(int value);
+
+/**
+  \rst
+  Returns an integer format specifier to pad the formatted argument with the
+  fill character to the specified width using the default (right) numeric
+  alignment.
+
+  **Example**::
+
+    MemoryWriter out;
+    out << pad(hex(0xcafe), 8, '0');
+    // out.str() == "0000cafe"
+
+  \endrst
+ */
+template <char TYPE_CODE, typename Char>
+IntFormatSpec<int, AlignTypeSpec<TYPE_CODE>, Char> pad(
+    int value, unsigned width, Char fill = ' ');
+
+#define FMT_DEFINE_INT_FORMATTERS(TYPE) \
+inline IntFormatSpec<TYPE, TypeSpec<'b'> > bin(TYPE value) { \
+  return IntFormatSpec<TYPE, TypeSpec<'b'> >(value, TypeSpec<'b'>()); \
+} \
+ \
+inline IntFormatSpec<TYPE, TypeSpec<'o'> > oct(TYPE value) { \
+  return IntFormatSpec<TYPE, TypeSpec<'o'> >(value, TypeSpec<'o'>()); \
+} \
+ \
+inline IntFormatSpec<TYPE, TypeSpec<'x'> > hex(TYPE value) { \
+  return IntFormatSpec<TYPE, TypeSpec<'x'> >(value, TypeSpec<'x'>()); \
+} \
+ \
+inline IntFormatSpec<TYPE, TypeSpec<'X'> > hexu(TYPE value) { \
+  return IntFormatSpec<TYPE, TypeSpec<'X'> >(value, TypeSpec<'X'>()); \
+} \
+ \
+template <char TYPE_CODE> \
+inline IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE> > pad( \
+    IntFormatSpec<TYPE, TypeSpec<TYPE_CODE> > f, unsigned width) { \
+  return IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE> >( \
+      f.value(), AlignTypeSpec<TYPE_CODE>(width, ' ')); \
+} \
+ \
+/* For compatibility with older compilers we provide two overloads for pad, */ \
+/* one that takes a fill character and one that doesn't. In the future this */ \
+/* can be replaced with one overload making the template argument Char      */ \
+/* default to char (C++11). */ \
+template <char TYPE_CODE, typename Char> \
+inline IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE>, Char> pad( \
+    IntFormatSpec<TYPE, TypeSpec<TYPE_CODE>, Char> f, \
+    unsigned width, Char fill) { \
+  return IntFormatSpec<TYPE, AlignTypeSpec<TYPE_CODE>, Char>( \
+      f.value(), AlignTypeSpec<TYPE_CODE>(width, fill)); \
+} \
+ \
+inline IntFormatSpec<TYPE, AlignTypeSpec<0> > pad( \
+    TYPE value, unsigned width) { \
+  return IntFormatSpec<TYPE, AlignTypeSpec<0> >( \
+      value, AlignTypeSpec<0>(width, ' ')); \
+} \
+ \
+template <typename Char> \
+inline IntFormatSpec<TYPE, AlignTypeSpec<0>, Char> pad( \
+   TYPE value, unsigned width, Char fill) { \
+ return IntFormatSpec<TYPE, AlignTypeSpec<0>, Char>( \
+     value, AlignTypeSpec<0>(width, fill)); \
+}
+
+FMT_DEFINE_INT_FORMATTERS(int)
+FMT_DEFINE_INT_FORMATTERS(long)
+FMT_DEFINE_INT_FORMATTERS(unsigned)
+FMT_DEFINE_INT_FORMATTERS(unsigned long)
+FMT_DEFINE_INT_FORMATTERS(LongLong)
+FMT_DEFINE_INT_FORMATTERS(ULongLong)
+
+/**
+  \rst
+  Returns a string formatter that pads the formatted argument with the fill
+  character to the specified width using the default (left) string alignment.
+
+  **Example**::
+
+    std::string s = str(MemoryWriter() << pad("abc", 8));
+    // s == "abc     "
+
+  \endrst
+ */
+template <typename Char>
+inline StrFormatSpec<Char> pad(
+    const Char *str, unsigned width, Char fill = ' ') {
+  return StrFormatSpec<Char>(str, width, fill);
+}
+
+inline StrFormatSpec<wchar_t> pad(
+    const wchar_t *str, unsigned width, char fill = ' ') {
+  return StrFormatSpec<wchar_t>(str, width, fill);
+}
+
+namespace internal {
+
+template <typename Char>
+class ArgMap {
+ private:
+  typedef std::vector<
+    std::pair<fmt::BasicStringRef<Char>, internal::Arg> > MapType;
+  typedef typename MapType::value_type Pair;
+
+  MapType map_;
+
+ public:
+  void init(const ArgList &args);
+
+  const internal::Arg *find(const fmt::BasicStringRef<Char> &name) const {
+    // The list is unsorted, so just return the first matching name.
+    for (typename MapType::const_iterator it = map_.begin(), end = map_.end();
+         it != end; ++it) {
+      if (it->first == name)
+        return &it->second;
+    }
+    return FMT_NULL;
+  }
+};
+
+template <typename Char>
+void ArgMap<Char>::init(const ArgList &args) {
+  if (!map_.empty())
+    return;
+  typedef internal::NamedArg<Char> NamedArg;
+  const NamedArg *named_arg = FMT_NULL;
+  bool use_values =
+      args.type(ArgList::MAX_PACKED_ARGS - 1) == internal::Arg::NONE;
+  if (use_values) {
+    for (unsigned i = 0;/*nothing*/; ++i) {
+      internal::Arg::Type arg_type = args.type(i);
+      switch (arg_type) {
+      case internal::Arg::NONE:
+        return;
+      case internal::Arg::NAMED_ARG:
+        named_arg = static_cast<const NamedArg*>(args.values_[i].pointer);
+        map_.push_back(Pair(named_arg->name, *named_arg));
+        break;
+      default:
+        /*nothing*/;
+      }
+    }
+    return;
+  }
+  for (unsigned i = 0; i != ArgList::MAX_PACKED_ARGS; ++i) {
+    internal::Arg::Type arg_type = args.type(i);
+    if (arg_type == internal::Arg::NAMED_ARG) {
+      named_arg = static_cast<const NamedArg*>(args.args_[i].pointer);
+      map_.push_back(Pair(named_arg->name, *named_arg));
+    }
+  }
+  for (unsigned i = ArgList::MAX_PACKED_ARGS;/*nothing*/; ++i) {
+    switch (args.args_[i].type) {
+    case internal::Arg::NONE:
+      return;
+    case internal::Arg::NAMED_ARG:
+      named_arg = static_cast<const NamedArg*>(args.args_[i].pointer);
+      map_.push_back(Pair(named_arg->name, *named_arg));
+      break;
+    default:
+      /*nothing*/;
+    }
+  }
+}
+
+template <typename Impl, typename Char, typename Spec = fmt::FormatSpec>
+class ArgFormatterBase : public ArgVisitor<Impl, void> {
+ private:
+  BasicWriter<Char> &writer_;
+  Spec &spec_;
+
+  FMT_DISALLOW_COPY_AND_ASSIGN(ArgFormatterBase);
+
+  void write_pointer(const void *p) {
+    spec_.flags_ = HASH_FLAG;
+    spec_.type_ = 'x';
+    writer_.write_int(reinterpret_cast<uintptr_t>(p), spec_);
+  }
+
+  // workaround MSVC two-phase lookup issue
+  typedef internal::Arg Arg;
+
+ protected:
+  BasicWriter<Char> &writer() { return writer_; }
+  Spec &spec() { return spec_; }
+
+  void write(bool value) {
+    const char *str_value = value ? "true" : "false";
+    Arg::StringValue<char> str = { str_value, std::strlen(str_value) };
+    writer_.write_str(str, spec_);
+  }
+
+  void write(const char *value) {
+    Arg::StringValue<char> str = {value, value ? std::strlen(value) : 0};
+    writer_.write_str(str, spec_);
+  }
+
+ public:
+  typedef Spec SpecType;
+
+  ArgFormatterBase(BasicWriter<Char> &w, Spec &s)
+  : writer_(w), spec_(s) {}
+
+  template <typename T>
+  void visit_any_int(T value) { writer_.write_int(value, spec_); }
+
+  template <typename T>
+  void visit_any_double(T value) { writer_.write_double(value, spec_); }
+
+  void visit_bool(bool value) {
+    if (spec_.type_) {
+      visit_any_int(value);
+      return;
+    }
+    write(value);
+  }
+
+  void visit_char(int value) {
+    if (spec_.type_ && spec_.type_ != 'c') {
+      spec_.flags_ |= CHAR_FLAG;
+      writer_.write_int(value, spec_);
+      return;
+    }
+    if (spec_.align_ == ALIGN_NUMERIC || spec_.flags_ != 0)
+      FMT_THROW(FormatError("invalid format specifier for char"));
+    typedef typename BasicWriter<Char>::CharPtr CharPtr;
+    Char fill = internal::CharTraits<Char>::cast(spec_.fill());
+    CharPtr out = CharPtr();
+    const unsigned CHAR_SIZE = 1;
+    if (spec_.width_ > CHAR_SIZE) {
+      out = writer_.grow_buffer(spec_.width_);
+      if (spec_.align_ == ALIGN_RIGHT) {
+        std::uninitialized_fill_n(out, spec_.width_ - CHAR_SIZE, fill);
+        out += spec_.width_ - CHAR_SIZE;
+      } else if (spec_.align_ == ALIGN_CENTER) {
+        out = writer_.fill_padding(out, spec_.width_,
+                                   internal::const_check(CHAR_SIZE), fill);
+      } else {
+        std::uninitialized_fill_n(out + CHAR_SIZE,
+                                  spec_.width_ - CHAR_SIZE, fill);
+      }
+    } else {
+      out = writer_.grow_buffer(CHAR_SIZE);
+    }
+    *out = internal::CharTraits<Char>::cast(value);
+  }
+
+  void visit_cstring(const char *value) {
+    if (spec_.type_ == 'p')
+      return write_pointer(value);
+    write(value);
+  }
+
+  // Qualification with "internal" here and below is a workaround for nvcc.
+  void visit_string(internal::Arg::StringValue<char> value) {
+    writer_.write_str(value, spec_);
+  }
+
+  using ArgVisitor<Impl, void>::visit_wstring;
+
+  void visit_wstring(internal::Arg::StringValue<Char> value) {
+    writer_.write_str(value, spec_);
+  }
+
+  void visit_pointer(const void *value) {
+    if (spec_.type_ && spec_.type_ != 'p')
+      report_unknown_type(spec_.type_, "pointer");
+    write_pointer(value);
+  }
+};
+
+class FormatterBase {
+ private:
+  ArgList args_;
+  int next_arg_index_;
+
+  // Returns the argument with specified index.
+  FMT_API Arg do_get_arg(unsigned arg_index, const char *&error);
+
+ protected:
+  const ArgList &args() const { return args_; }
+
+  explicit FormatterBase(const ArgList &args) {
+    args_ = args;
+    next_arg_index_ = 0;
+  }
+
+  // Returns the next argument.
+  Arg next_arg(const char *&error) {
+    if (next_arg_index_ >= 0)
+      return do_get_arg(internal::to_unsigned(next_arg_index_++), error);
+    error = "cannot switch from manual to automatic argument indexing";
+    return Arg();
+  }
+
+  // Checks if manual indexing is used and returns the argument with
+  // specified index.
+  Arg get_arg(unsigned arg_index, const char *&error) {
+    return check_no_auto_index(error) ? do_get_arg(arg_index, error) : Arg();
+  }
+
+  bool check_no_auto_index(const char *&error) {
+    if (next_arg_index_ > 0) {
+      error = "cannot switch from automatic to manual argument indexing";
+      return false;
+    }
+    next_arg_index_ = -1;
+    return true;
+  }
+
+  template <typename Char>
+  void write(BasicWriter<Char> &w, const Char *start, const Char *end) {
+    if (start != end)
+      w << BasicStringRef<Char>(start, internal::to_unsigned(end - start));
+  }
+};
+}  // namespace internal
+
+/**
+  \rst
+  An argument formatter based on the `curiously recurring template pattern
+  <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_.
+
+  To use `~fmt::BasicArgFormatter` define a subclass that implements some or
+  all of the visit methods with the same signatures as the methods in
+  `~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`.
+  Pass the subclass as the *Impl* template parameter. When a formatting
+  function processes an argument, it will dispatch to a visit method
+  specific to the argument type. For example, if the argument type is
+  ``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
+  will be called. If the subclass doesn't contain a method with this signature,
+  then a corresponding method of `~fmt::BasicArgFormatter` or its superclass
+  will be called.
+  \endrst
+ */
+template <typename Impl, typename Char, typename Spec = fmt::FormatSpec>
+class BasicArgFormatter : public internal::ArgFormatterBase<Impl, Char, Spec> {
+ private:
+  BasicFormatter<Char, Impl> &formatter_;
+  const Char *format_;
+
+ public:
+  /**
+    \rst
+    Constructs an argument formatter object.
+    *formatter* is a reference to the main formatter object, *spec* contains
+    format specifier information for standard argument types, and *fmt* points
+    to the part of the format string being parsed for custom argument types.
+    \endrst
+   */
+  BasicArgFormatter(BasicFormatter<Char, Impl> &formatter,
+                    Spec &spec, const Char *fmt)
+  : internal::ArgFormatterBase<Impl, Char, Spec>(formatter.writer(), spec),
+    formatter_(formatter), format_(fmt) {}
+
+  /** Formats an argument of a custom (user-defined) type. */
+  void visit_custom(internal::Arg::CustomValue c) {
+    c.format(&formatter_, c.value, &format_);
+  }
+};
+
+/** The default argument formatter. */
+template <typename Char>
+class ArgFormatter :
+    public BasicArgFormatter<ArgFormatter<Char>, Char, FormatSpec> {
+ public:
+  /** Constructs an argument formatter object. */
+  ArgFormatter(BasicFormatter<Char> &formatter,
+               FormatSpec &spec, const Char *fmt)
+  : BasicArgFormatter<ArgFormatter<Char>,
+                      Char, FormatSpec>(formatter, spec, fmt) {}
+};
+
+/** This template formats data and writes the output to a writer. */
+template <typename CharType, typename ArgFormatter>
+class BasicFormatter : private internal::FormatterBase {
+ public:
+  /** The character type for the output. */
+  typedef CharType Char;
+
+ private:
+  BasicWriter<Char> &writer_;
+  internal::ArgMap<Char> map_;
+
+  FMT_DISALLOW_COPY_AND_ASSIGN(BasicFormatter);
+
+  using internal::FormatterBase::get_arg;
+
+  // Checks if manual indexing is used and returns the argument with
+  // specified name.
+  internal::Arg get_arg(BasicStringRef<Char> arg_name, const char *&error);
+
+  // Parses argument index and returns corresponding argument.
+  internal::Arg parse_arg_index(const Char *&s);
+
+  // Parses argument name and returns corresponding argument.
+  internal::Arg parse_arg_name(const Char *&s);
+
+ public:
+  /**
+   \rst
+   Constructs a ``BasicFormatter`` object. References to the arguments and
+   the writer are stored in the formatter object so make sure they have
+   appropriate lifetimes.
+   \endrst
+   */
+  BasicFormatter(const ArgList &args, BasicWriter<Char> &w)
+    : internal::FormatterBase(args), writer_(w) {}
+
+  /** Returns a reference to the writer associated with this formatter. */
+  BasicWriter<Char> &writer() { return writer_; }
+
+  /** Formats stored arguments and writes the output to the writer. */
+  void format(BasicCStringRef<Char> format_str);
+
+  // Formats a single argument and advances format_str, a format string pointer.
+  const Char *format(const Char *&format_str, const internal::Arg &arg);
+};
+
+// Generates a comma-separated list with results of applying f to
+// numbers 0..n-1.
+# define FMT_GEN(n, f) FMT_GEN##n(f)
+# define FMT_GEN1(f)  f(0)
+# define FMT_GEN2(f)  FMT_GEN1(f),  f(1)
+# define FMT_GEN3(f)  FMT_GEN2(f),  f(2)
+# define FMT_GEN4(f)  FMT_GEN3(f),  f(3)
+# define FMT_GEN5(f)  FMT_GEN4(f),  f(4)
+# define FMT_GEN6(f)  FMT_GEN5(f),  f(5)
+# define FMT_GEN7(f)  FMT_GEN6(f),  f(6)
+# define FMT_GEN8(f)  FMT_GEN7(f),  f(7)
+# define FMT_GEN9(f)  FMT_GEN8(f),  f(8)
+# define FMT_GEN10(f) FMT_GEN9(f),  f(9)
+# define FMT_GEN11(f) FMT_GEN10(f), f(10)
+# define FMT_GEN12(f) FMT_GEN11(f), f(11)
+# define FMT_GEN13(f) FMT_GEN12(f), f(12)
+# define FMT_GEN14(f) FMT_GEN13(f), f(13)
+# define FMT_GEN15(f) FMT_GEN14(f), f(14)
+
+namespace internal {
+inline uint64_t make_type() { return 0; }
+
+template <typename T>
+inline uint64_t make_type(const T &arg) {
+  return MakeValue< BasicFormatter<char> >::type(arg);
+}
+
+template <std::size_t N, bool/*IsPacked*/= (N < ArgList::MAX_PACKED_ARGS)>
+struct ArgArray;
+
+template <std::size_t N>
+struct ArgArray<N, true/*IsPacked*/> {
+  // '+' is used to silence GCC -Wduplicated-branches warning.
+  typedef Value Type[N > 0 ? N : +1];
+
+  template <typename Formatter, typename T>
+  static Value make(const T &value) {
+#ifdef __clang__
+    Value result = MakeValue<Formatter>(value);
+    // Workaround a bug in Apple LLVM version 4.2 (clang-425.0.28) of clang:
+    // https://github.com/fmtlib/fmt/issues/276
+    (void)result.custom.format;
+    return result;
+#else
+    return MakeValue<Formatter>(value);
+#endif
+  }
+};
+
+template <std::size_t N>
+struct ArgArray<N, false/*IsPacked*/> {
+  typedef Arg Type[N + 1]; // +1 for the list end Arg::NONE
+
+  template <typename Formatter, typename T>
+  static Arg make(const T &value) { return MakeArg<Formatter>(value); }
+};
+
+#if FMT_USE_VARIADIC_TEMPLATES
+template <typename Arg, typename... Args>
+inline uint64_t make_type(const Arg &first, const Args & ... tail) {
+  return make_type(first) | (make_type(tail...) << 4);
+}
+
+#else
+
+struct ArgType {
+  uint64_t type;
+
+  ArgType() : type(0) {}
+
+  template <typename T>
+  ArgType(const T &arg) : type(make_type(arg)) {}
+};
+
+# define FMT_ARG_TYPE_DEFAULT(n) ArgType t##n = ArgType()
+
+inline uint64_t make_type(FMT_GEN15(FMT_ARG_TYPE_DEFAULT)) {
+  return t0.type | (t1.type << 4) | (t2.type << 8) | (t3.type << 12) |
+      (t4.type << 16) | (t5.type << 20) | (t6.type << 24) | (t7.type << 28) |
+      (t8.type << 32) | (t9.type << 36) | (t10.type << 40) | (t11.type << 44) |
+      (t12.type << 48) | (t13.type << 52) | (t14.type << 56);
+}
+#endif
+}  // namespace internal
+
+# define FMT_MAKE_TEMPLATE_ARG(n) typename T##n
+# define FMT_MAKE_ARG_TYPE(n) T##n
+# define FMT_MAKE_ARG(n) const T##n &v##n
+# define FMT_ASSIGN_char(n) \
+  arr[n] = fmt::internal::MakeValue< fmt::BasicFormatter<char> >(v##n)
+# define FMT_ASSIGN_wchar_t(n) \
+  arr[n] = fmt::internal::MakeValue< fmt::BasicFormatter<wchar_t> >(v##n)
+
+#if FMT_USE_VARIADIC_TEMPLATES
+// Defines a variadic function returning void.
+# define FMT_VARIADIC_VOID(func, arg_type) \
+  template <typename... Args> \
+  void func(arg_type arg0, const Args & ... args) { \
+    typedef fmt::internal::ArgArray<sizeof...(Args)> ArgArray; \
+    typename ArgArray::Type array{ \
+      ArgArray::template make<fmt::BasicFormatter<Char> >(args)...}; \
+    func(arg0, fmt::ArgList(fmt::internal::make_type(args...), array)); \
+  }
+
+// Defines a variadic constructor.
+# define FMT_VARIADIC_CTOR(ctor, func, arg0_type, arg1_type) \
+  template <typename... Args> \
+  ctor(arg0_type arg0, arg1_type arg1, const Args & ... args) { \
+    typedef fmt::internal::ArgArray<sizeof...(Args)> ArgArray; \
+    typename ArgArray::Type array{ \
+      ArgArray::template make<fmt::BasicFormatter<Char> >(args)...}; \
+    func(arg0, arg1, fmt::ArgList(fmt::internal::make_type(args...), array)); \
+  }
+
+#else
+
+# define FMT_MAKE_REF(n) \
+  fmt::internal::MakeValue< fmt::BasicFormatter<Char> >(v##n)
+# define FMT_MAKE_REF2(n) v##n
+
+// Defines a wrapper for a function taking one argument of type arg_type
+// and n additional arguments of arbitrary types.
+# define FMT_WRAP1(func, arg_type, n) \
+  template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \
+  inline void func(arg_type arg1, FMT_GEN(n, FMT_MAKE_ARG)) { \
+    const fmt::internal::ArgArray<n>::Type array = {FMT_GEN(n, FMT_MAKE_REF)}; \
+    func(arg1, fmt::ArgList( \
+      fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), array)); \
+  }
+
+// Emulates a variadic function returning void on a pre-C++11 compiler.
+# define FMT_VARIADIC_VOID(func, arg_type) \
+  inline void func(arg_type arg) { func(arg, fmt::ArgList()); } \
+  FMT_WRAP1(func, arg_type, 1) FMT_WRAP1(func, arg_type, 2) \
+  FMT_WRAP1(func, arg_type, 3) FMT_WRAP1(func, arg_type, 4) \
+  FMT_WRAP1(func, arg_type, 5) FMT_WRAP1(func, arg_type, 6) \
+  FMT_WRAP1(func, arg_type, 7) FMT_WRAP1(func, arg_type, 8) \
+  FMT_WRAP1(func, arg_type, 9) FMT_WRAP1(func, arg_type, 10)
+
+# define FMT_CTOR(ctor, func, arg0_type, arg1_type, n) \
+  template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \
+  ctor(arg0_type arg0, arg1_type arg1, FMT_GEN(n, FMT_MAKE_ARG)) { \
+    const fmt::internal::ArgArray<n>::Type array = {FMT_GEN(n, FMT_MAKE_REF)}; \
+    func(arg0, arg1, fmt::ArgList( \
+      fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), array)); \
+  }
+
+// Emulates a variadic constructor on a pre-C++11 compiler.
+# define FMT_VARIADIC_CTOR(ctor, func, arg0_type, arg1_type) \
+  FMT_CTOR(ctor, func, arg0_type, arg1_type, 1) \
+  FMT_CTOR(ctor, func, arg0_type, arg1_type, 2) \
+  FMT_CTOR(ctor, func, arg0_type, arg1_type, 3) \
+  FMT_CTOR(ctor, func, arg0_type, arg1_type, 4) \
+  FMT_CTOR(ctor, func, arg0_type, arg1_type, 5) \
+  FMT_CTOR(ctor, func, arg0_type, arg1_type, 6) \
+  FMT_CTOR(ctor, func, arg0_type, arg1_type, 7) \
+  FMT_CTOR(ctor, func, arg0_type, arg1_type, 8) \
+  FMT_CTOR(ctor, func, arg0_type, arg1_type, 9) \
+  FMT_CTOR(ctor, func, arg0_type, arg1_type, 10)
+#endif
+
+// Generates a comma-separated list with results of applying f to pairs
+// (argument, index).
+#define FMT_FOR_EACH1(f, x0) f(x0, 0)
+#define FMT_FOR_EACH2(f, x0, x1) \
+  FMT_FOR_EACH1(f, x0), f(x1, 1)
+#define FMT_FOR_EACH3(f, x0, x1, x2) \
+  FMT_FOR_EACH2(f, x0 ,x1), f(x2, 2)
+#define FMT_FOR_EACH4(f, x0, x1, x2, x3) \
+  FMT_FOR_EACH3(f, x0, x1, x2), f(x3, 3)
+#define FMT_FOR_EACH5(f, x0, x1, x2, x3, x4) \
+  FMT_FOR_EACH4(f, x0, x1, x2, x3), f(x4, 4)
+#define FMT_FOR_EACH6(f, x0, x1, x2, x3, x4, x5) \
+  FMT_FOR_EACH5(f, x0, x1, x2, x3, x4), f(x5, 5)
+#define FMT_FOR_EACH7(f, x0, x1, x2, x3, x4, x5, x6) \
+  FMT_FOR_EACH6(f, x0, x1, x2, x3, x4, x5), f(x6, 6)
+#define FMT_FOR_EACH8(f, x0, x1, x2, x3, x4, x5, x6, x7) \
+  FMT_FOR_EACH7(f, x0, x1, x2, x3, x4, x5, x6), f(x7, 7)
+#define FMT_FOR_EACH9(f, x0, x1, x2, x3, x4, x5, x6, x7, x8) \
+  FMT_FOR_EACH8(f, x0, x1, x2, x3, x4, x5, x6, x7), f(x8, 8)
+#define FMT_FOR_EACH10(f, x0, x1, x2, x3, x4, x5, x6, x7, x8, x9) \
+  FMT_FOR_EACH9(f, x0, x1, x2, x3, x4, x5, x6, x7, x8), f(x9, 9)
+
+/**
+ An error returned by an operating system or a language runtime,
+ for example a file opening error.
+*/
+class SystemError : public internal::RuntimeError {
+ private:
+  FMT_API void init(int err_code, CStringRef format_str, ArgList args);
+
+ protected:
+  int error_code_;
+
+  typedef char Char;  // For FMT_VARIADIC_CTOR.
+
+  SystemError() {}
+
+ public:
+  /**
+   \rst
+   Constructs a :class:`fmt::SystemError` object with a description
+   formatted with `fmt::format_system_error`. *message* and additional
+   arguments passed into the constructor are formatted similarly to
+   `fmt::format`.
+
+   **Example**::
+
+     // This throws a SystemError with the description
+     //   cannot open file 'madeup': No such file or directory
+     // or similar (system message may vary).
+     const char *filename = "madeup";
+     std::FILE *file = std::fopen(filename, "r");
+     if (!file)
+       throw fmt::SystemError(errno, "cannot open file '{}'", filename);
+   \endrst
+  */
+  SystemError(int error_code, CStringRef message) {
+    init(error_code, message, ArgList());
+  }
+  FMT_DEFAULTED_COPY_CTOR(SystemError)
+  FMT_VARIADIC_CTOR(SystemError, init, int, CStringRef)
+
+  FMT_API ~SystemError() FMT_DTOR_NOEXCEPT FMT_OVERRIDE;
+
+  int error_code() const { return error_code_; }
+};
+
+/**
+  \rst
+  Formats an error returned by an operating system or a language runtime,
+  for example a file opening error, and writes it to *out* in the following
+  form:
+
+  .. parsed-literal::
+     *<message>*: *<system-message>*
+
+  where *<message>* is the passed message and *<system-message>* is
+  the system message corresponding to the error code.
+  *error_code* is a system error code as given by ``errno``.
+  If *error_code* is not a valid error code such as -1, the system message
+  may look like "Unknown error -1" and is platform-dependent.
+  \endrst
+ */
+FMT_API void format_system_error(fmt::Writer &out, int error_code,
+                                 fmt::StringRef message) FMT_NOEXCEPT;
+
+/**
+  \rst
+  This template provides operations for formatting and writing data into
+  a character stream. The output is stored in a buffer provided by a subclass
+  such as :class:`fmt::BasicMemoryWriter`.
+
+  You can use one of the following typedefs for common character types:
+
+  +---------+----------------------+
+  | Type    | Definition           |
+  +=========+======================+
+  | Writer  | BasicWriter<char>    |
+  +---------+----------------------+
+  | WWriter | BasicWriter<wchar_t> |
+  +---------+----------------------+
+
+  \endrst
+ */
+template <typename Char>
+class BasicWriter {
+ private:
+  // Output buffer.
+  Buffer<Char> &buffer_;
+
+  FMT_DISALLOW_COPY_AND_ASSIGN(BasicWriter);
+
+  typedef typename internal::CharTraits<Char>::CharPtr CharPtr;
+
+#if FMT_SECURE_SCL
+  // Returns pointer value.
+  static Char *get(CharPtr p) { return p.base(); }
+#else
+  static Char *get(Char *p) { return p; }
+#endif
+
+  // Fills the padding around the content and returns the pointer to the
+  // content area.
+  static CharPtr fill_padding(CharPtr buffer,
+      unsigned total_size, std::size_t content_size, wchar_t fill);
+
+  // Grows the buffer by n characters and returns a pointer to the newly
+  // allocated area.
+  CharPtr grow_buffer(std::size_t n) {
+    std::size_t size = buffer_.size();
+    buffer_.resize(size + n);
+    return internal::make_ptr(&buffer_[size], n);
+  }
+
+  // Writes an unsigned decimal integer.
+  template <typename UInt>
+  Char *write_unsigned_decimal(UInt value, unsigned prefix_size = 0) {
+    unsigned num_digits = internal::count_digits(value);
+    Char *ptr = get(grow_buffer(prefix_size + num_digits));
+    internal::format_decimal(ptr + prefix_size, value, num_digits);
+    return ptr;
+  }
+
+  // Writes a decimal integer.
+  template <typename Int>
+  void write_decimal(Int value) {
+    typedef typename internal::IntTraits<Int>::MainType MainType;
+    MainType abs_value = static_cast<MainType>(value);
+    if (internal::is_negative(value)) {
+      abs_value = 0 - abs_value;
+      *write_unsigned_decimal(abs_value, 1) = '-';
+    } else {
+      write_unsigned_decimal(abs_value, 0);
+    }
+  }
+
+  // Prepare a buffer for integer formatting.
+  CharPtr prepare_int_buffer(unsigned num_digits,
+      const EmptySpec &, const char *prefix, unsigned prefix_size) {
+    unsigned size = prefix_size + num_digits;
+    CharPtr p = grow_buffer(size);
+    std::uninitialized_copy(prefix, prefix + prefix_size, p);
+    return p + size - 1;
+  }
+
+  template <typename Spec>
+  CharPtr prepare_int_buffer(unsigned num_digits,
+    const Spec &spec, const char *prefix, unsigned prefix_size);
+
+  // Formats an integer.
+  template <typename T, typename Spec>
+  void write_int(T value, Spec spec);
+
+  // Formats a floating-point number (double or long double).
+  template <typename T, typename Spec>
+  void write_double(T value, const Spec &spec);
+
+  // Writes a formatted string.
+  template <typename StrChar>
+  CharPtr write_str(const StrChar *s, std::size_t size, const AlignSpec &spec);
+
+  template <typename StrChar, typename Spec>
+  void write_str(const internal::Arg::StringValue<StrChar> &str,
+                 const Spec &spec);
+
+  // This following methods are private to disallow writing wide characters
+  // and strings to a char stream. If you want to print a wide string as a
+  // pointer as std::ostream does, cast it to const void*.
+  // Do not implement!
+  void operator<<(typename internal::WCharHelper<wchar_t, Char>::Unsupported);
+  void operator<<(
+      typename internal::WCharHelper<const wchar_t *, Char>::Unsupported);
+
+  // Appends floating-point length specifier to the format string.
+  // The second argument is only used for overload resolution.
+  void append_float_length(Char *&format_ptr, long double) {
+    *format_ptr++ = 'L';
+  }
+
+  template<typename T>
+  void append_float_length(Char *&, T) {}
+
+  template <typename Impl, typename Char_, typename Spec_>
+  friend class internal::ArgFormatterBase;
+
+  template <typename Impl, typename Char_, typename Spec_>
+  friend class BasicPrintfArgFormatter;
+
+ protected:
+  /**
+    Constructs a ``BasicWriter`` object.
+   */
+  explicit BasicWriter(Buffer<Char> &b) : buffer_(b) {}
+
+ public:
+  /**
+    \rst
+    Destroys a ``BasicWriter`` object.
+    \endrst
+   */
+  virtual ~BasicWriter() {}
+
+  /**
+    Returns the total number of characters written.
+   */
+  std::size_t size() const { return buffer_.size(); }
+
+  /**
+    Returns a pointer to the output buffer content. No terminating null
+    character is appended.
+   */
+  const Char *data() const FMT_NOEXCEPT { return &buffer_[0]; }
+
+  /**
+    Returns a pointer to the output buffer content with terminating null
+    character appended.
+   */
+  const Char *c_str() const {
+    std::size_t size = buffer_.size();
+    buffer_.reserve(size + 1);
+    buffer_[size] = '\0';
+    return &buffer_[0];
+  }
+
+  /**
+    \rst
+    Returns the content of the output buffer as an `std::string`.
+    \endrst
+   */
+  std::basic_string<Char> str() const {
+    return std::basic_string<Char>(&buffer_[0], buffer_.size());
+  }
+
+  /**
+    \rst
+    Writes formatted data.
+
+    *args* is an argument list representing arbitrary arguments.
+
+    **Example**::
+
+       MemoryWriter out;
+       out.write("Current point:\n");
+       out.write("({:+f}, {:+f})", -3.14, 3.14);
+
+    This will write the following output to the ``out`` object:
+
+    .. code-block:: none
+
+       Current point:
+       (-3.140000, +3.140000)
+
+    The output can be accessed using :func:`data()`, :func:`c_str` or
+    :func:`str` methods.
+
+    See also :ref:`syntax`.
+    \endrst
+   */
+  void write(BasicCStringRef<Char> format, ArgList args) {
+    BasicFormatter<Char>(args, *this).format(format);
+  }
+  FMT_VARIADIC_VOID(write, BasicCStringRef<Char>)
+
+  BasicWriter &operator<<(int value) {
+    write_decimal(value);
+    return *this;
+  }
+  BasicWriter &operator<<(unsigned value) {
+    return *this << IntFormatSpec<unsigned>(value);
+  }
+  BasicWriter &operator<<(long value) {
+    write_decimal(value);
+    return *this;
+  }
+  BasicWriter &operator<<(unsigned long value) {
+    return *this << IntFormatSpec<unsigned long>(value);
+  }
+  BasicWriter &operator<<(LongLong value) {
+    write_decimal(value);
+    return *this;
+  }
+
+  /**
+    \rst
+    Formats *value* and writes it to the stream.
+    \endrst
+   */
+  BasicWriter &operator<<(ULongLong value) {
+    return *this << IntFormatSpec<ULongLong>(value);
+  }
+
+  BasicWriter &operator<<(double value) {
+    write_double(value, FormatSpec());
+    return *this;
+  }
+
+  /**
+    \rst
+    Formats *value* using the general format for floating-point numbers
+    (``'g'``) and writes it to the stream.
+    \endrst
+   */
+  BasicWriter &operator<<(long double value) {
+    write_double(value, FormatSpec());
+    return *this;
+  }
+
+  /**
+    Writes a character to the stream.
+   */
+  BasicWriter &operator<<(char value) {
+    buffer_.push_back(value);
+    return *this;
+  }
+
+  BasicWriter &operator<<(
+      typename internal::WCharHelper<wchar_t, Char>::Supported value) {
+    buffer_.push_back(value);
+    return *this;
+  }
+
+  /**
+    \rst
+    Writes *value* to the stream.
+    \endrst
+   */
+  BasicWriter &operator<<(fmt::BasicStringRef<Char> value) {
+    const Char *str = value.data();
+    buffer_.append(str, str + value.size());
+    return *this;
+  }
+
+  BasicWriter &operator<<(
+      typename internal::WCharHelper<StringRef, Char>::Supported value) {
+    const char *str = value.data();
+    buffer_.append(str, str + value.size());
+    return *this;
+  }
+
+  template <typename T, typename Spec, typename FillChar>
+  BasicWriter &operator<<(IntFormatSpec<T, Spec, FillChar> spec) {
+    internal::CharTraits<Char>::convert(FillChar());
+    write_int(spec.value(), spec);
+    return *this;
+  }
+
+  template <typename StrChar>
+  BasicWriter &operator<<(const StrFormatSpec<StrChar> &spec) {
+    const StrChar *s = spec.str();
+    write_str(s, std::char_traits<Char>::length(s), spec);
+    return *this;
+  }
+
+  void clear() FMT_NOEXCEPT { buffer_.clear(); }
+
+  Buffer<Char> &buffer() FMT_NOEXCEPT { return buffer_; }
+};
+
+template <typename Char>
+template <typename StrChar>
+typename BasicWriter<Char>::CharPtr BasicWriter<Char>::write_str(
+      const StrChar *s, std::size_t size, const AlignSpec &spec) {
+  CharPtr out = CharPtr();
+  if (spec.width() > size) {
+    out = grow_buffer(spec.width());
+    Char fill = internal::CharTraits<Char>::cast(spec.fill());
+    if (spec.align() == ALIGN_RIGHT) {
+      std::uninitialized_fill_n(out, spec.width() - size, fill);
+      out += spec.width() - size;
+    } else if (spec.align() == ALIGN_CENTER) {
+      out = fill_padding(out, spec.width(), size, fill);
+    } else {
+      std::uninitialized_fill_n(out + size, spec.width() - size, fill);
+    }
+  } else {
+    out = grow_buffer(size);
+  }
+  std::uninitialized_copy(s, s + size, out);
+  return out;
+}
+
+template <typename Char>
+template <typename StrChar, typename Spec>
+void BasicWriter<Char>::write_str(
+    const internal::Arg::StringValue<StrChar> &s, const Spec &spec) {
+  // Check if StrChar is convertible to Char.
+  internal::CharTraits<Char>::convert(StrChar());
+  if (spec.type_ && spec.type_ != 's')
+    internal::report_unknown_type(spec.type_, "string");
+  const StrChar *str_value = s.value;
+  std::size_t str_size = s.size;
+  if (str_size == 0) {
+    if (!str_value) {
+      FMT_THROW(FormatError("string pointer is null"));
+    }
+  }
+  std::size_t precision = static_cast<std::size_t>(spec.precision_);
+  if (spec.precision_ >= 0 && precision < str_size)
+    str_size = precision;
+  write_str(str_value, str_size, spec);
+}
+
+template <typename Char>
+typename BasicWriter<Char>::CharPtr
+  BasicWriter<Char>::fill_padding(
+    CharPtr buffer, unsigned total_size,
+    std::size_t content_size, wchar_t fill) {
+  std::size_t padding = total_size - content_size;
+  std::size_t left_padding = padding / 2;
+  Char fill_char = internal::CharTraits<Char>::cast(fill);
+  std::uninitialized_fill_n(buffer, left_padding, fill_char);
+  buffer += left_padding;
+  CharPtr content = buffer;
+  std::uninitialized_fill_n(buffer + content_size,
+                            padding - left_padding, fill_char);
+  return content;
+}
+
+template <typename Char>
+template <typename Spec>
+typename BasicWriter<Char>::CharPtr
+  BasicWriter<Char>::prepare_int_buffer(
+    unsigned num_digits, const Spec &spec,
+    const char *prefix, unsigned prefix_size) {
+  unsigned width = spec.width();
+  Alignment align = spec.align();
+  Char fill = internal::CharTraits<Char>::cast(spec.fill());
+  if (spec.precision() > static_cast<int>(num_digits)) {
+    // Octal prefix '0' is counted as a digit, so ignore it if precision
+    // is specified.
+    if (prefix_size > 0 && prefix[prefix_size - 1] == '0')
+      --prefix_size;
+    unsigned number_size =
+        prefix_size + internal::to_unsigned(spec.precision());
+    AlignSpec subspec(number_size, '0', ALIGN_NUMERIC);
+    if (number_size >= width)
+      return prepare_int_buffer(num_digits, subspec, prefix, prefix_size);
+    buffer_.reserve(width);
+    unsigned fill_size = width - number_size;
+    if (align != ALIGN_LEFT) {
+      CharPtr p = grow_buffer(fill_size);
+      std::uninitialized_fill(p, p + fill_size, fill);
+    }
+    CharPtr result = prepare_int_buffer(
+        num_digits, subspec, prefix, prefix_size);
+    if (align == ALIGN_LEFT) {
+      CharPtr p = grow_buffer(fill_size);
+      std::uninitialized_fill(p, p + fill_size, fill);
+    }
+    return result;
+  }
+  unsigned size = prefix_size + num_digits;
+  if (width <= size) {
+    CharPtr p = grow_buffer(size);
+    std::uninitialized_copy(prefix, prefix + prefix_size, p);
+    return p + size - 1;
+  }
+  CharPtr p = grow_buffer(width);
+  CharPtr end = p + width;
+  if (align == ALIGN_LEFT) {
+    std::uninitialized_copy(prefix, prefix + prefix_size, p);
+    p += size;
+    std::uninitialized_fill(p, end, fill);
+  } else if (align == ALIGN_CENTER) {
+    p = fill_padding(p, width, size, fill);
+    std::uninitialized_copy(prefix, prefix + prefix_size, p);
+    p += size;
+  } else {
+    if (align == ALIGN_NUMERIC) {
+      if (prefix_size != 0) {
+        p = std::uninitialized_copy(prefix, prefix + prefix_size, p);
+        size -= prefix_size;
+      }
+    } else {
+      std::uninitialized_copy(prefix, prefix + prefix_size, end - size);
+    }
+    std::uninitialized_fill(p, end - size, fill);
+    p = end;
+  }
+  return p - 1;
+}
+
+template <typename Char>
+template <typename T, typename Spec>
+void BasicWriter<Char>::write_int(T value, Spec spec) {
+  unsigned prefix_size = 0;
+  typedef typename internal::IntTraits<T>::MainType UnsignedType;
+  UnsignedType abs_value = static_cast<UnsignedType>(value);
+  char prefix[4] = "";
+  if (internal::is_negative(value)) {
+    prefix[0] = '-';
+    ++prefix_size;
+    abs_value = 0 - abs_value;
+  } else if (spec.flag(SIGN_FLAG)) {
+    prefix[0] = spec.flag(PLUS_FLAG) ? '+' : ' ';
+    ++prefix_size;
+  }
+  switch (spec.type()) {
+  case 0: case 'd': {
+    unsigned num_digits = internal::count_digits(abs_value);
+    CharPtr p = prepare_int_buffer(num_digits, spec, prefix, prefix_size) + 1;
+    internal::format_decimal(get(p), abs_value, 0);
+    break;
+  }
+  case 'x': case 'X': {
+    UnsignedType n = abs_value;
+    if (spec.flag(HASH_FLAG)) {
+      prefix[prefix_size++] = '0';
+      prefix[prefix_size++] = spec.type_prefix();
+    }
+    unsigned num_digits = 0;
+    do {
+      ++num_digits;
+    } while ((n >>= 4) != 0);
+    Char *p = get(prepare_int_buffer(
+      num_digits, spec, prefix, prefix_size));
+    n = abs_value;
+    const char *digits = spec.type() == 'x' ?
+        "0123456789abcdef" : "0123456789ABCDEF";
+    do {
+      *p-- = digits[n & 0xf];
+    } while ((n >>= 4) != 0);
+    break;
+  }
+  case 'b': case 'B': {
+    UnsignedType n = abs_value;
+    if (spec.flag(HASH_FLAG)) {
+      prefix[prefix_size++] = '0';
+      prefix[prefix_size++] = spec.type_prefix();
+    }
+    unsigned num_digits = 0;
+    do {
+      ++num_digits;
+    } while ((n >>= 1) != 0);
+    Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size));
+    n = abs_value;
+    do {
+      *p-- = static_cast<Char>('0' + (n & 1));
+    } while ((n >>= 1) != 0);
+    break;
+  }
+  case 'o': {
+    UnsignedType n = abs_value;
+    if (spec.flag(HASH_FLAG))
+      prefix[prefix_size++] = '0';
+    unsigned num_digits = 0;
+    do {
+      ++num_digits;
+    } while ((n >>= 3) != 0);
+    Char *p = get(prepare_int_buffer(num_digits, spec, prefix, prefix_size));
+    n = abs_value;
+    do {
+      *p-- = static_cast<Char>('0' + (n & 7));
+    } while ((n >>= 3) != 0);
+    break;
+  }
+  case 'n': {
+    unsigned num_digits = internal::count_digits(abs_value);
+    fmt::StringRef sep = "";
+#if !(defined(ANDROID) || defined(__ANDROID__))
+    sep = internal::thousands_sep(std::localeconv());
+#endif
+    unsigned size = static_cast<unsigned>(
+          num_digits + sep.size() * ((num_digits - 1) / 3));
+    CharPtr p = prepare_int_buffer(size, spec, prefix, prefix_size) + 1;
+    internal::format_decimal(get(p), abs_value, 0, internal::ThousandsSep(sep));
+    break;
+  }
+  default:
+    internal::report_unknown_type(
+      spec.type(), spec.flag(CHAR_FLAG) ? "char" : "integer");
+    break;
+  }
+}
+
+template <typename Char>
+template <typename T, typename Spec>
+void BasicWriter<Char>::write_double(T value, const Spec &spec) {
+  // Check type.
+  char type = spec.type();
+  bool upper = false;
+  switch (type) {
+  case 0:
+    type = 'g';
+    break;
+  case 'e': case 'f': case 'g': case 'a':
+    break;
+  case 'F':
+#if FMT_MSC_VER
+    // MSVC's printf doesn't support 'F'.
+    type = 'f';
+#endif
+    // Fall through.
+  case 'E': case 'G': case 'A':
+    upper = true;
+    break;
+  default:
+    internal::report_unknown_type(type, "double");
+    break;
+  }
+
+  char sign = 0;
+  // Use isnegative instead of value < 0 because the latter is always
+  // false for NaN.
+  if (internal::FPUtil::isnegative(static_cast<double>(value))) {
+    sign = '-';
+    value = -value;
+  } else if (spec.flag(SIGN_FLAG)) {
+    sign = spec.flag(PLUS_FLAG) ? '+' : ' ';
+  }
+
+  if (internal::FPUtil::isnotanumber(value)) {
+    // Format NaN ourselves because sprintf's output is not consistent
+    // across platforms.
+    std::size_t nan_size = 4;
+    const char *nan = upper ? " NAN" : " nan";
+    if (!sign) {
+      --nan_size;
+      ++nan;
+    }
+    CharPtr out = write_str(nan, nan_size, spec);
+    if (sign)
+      *out = sign;
+    return;
+  }
+
+  if (internal::FPUtil::isinfinity(value)) {
+    // Format infinity ourselves because sprintf's output is not consistent
+    // across platforms.
+    std::size_t inf_size = 4;
+    const char *inf = upper ? " INF" : " inf";
+    if (!sign) {
+      --inf_size;
+      ++inf;
+    }
+    CharPtr out = write_str(inf, inf_size, spec);
+    if (sign)
+      *out = sign;
+    return;
+  }
+
+  std::size_t offset = buffer_.size();
+  unsigned width = spec.width();
+  if (sign) {
+    buffer_.reserve(buffer_.size() + (width > 1u ? width : 1u));
+    if (width > 0)
+      --width;
+    ++offset;
+  }
+
+  // Build format string.
+  enum { MAX_FORMAT_SIZE = 10}; // longest format: %#-*.*Lg
+  Char format[MAX_FORMAT_SIZE];
+  Char *format_ptr = format;
+  *format_ptr++ = '%';
+  unsigned width_for_sprintf = width;
+  if (spec.flag(HASH_FLAG))
+    *format_ptr++ = '#';
+  if (spec.align() == ALIGN_CENTER) {
+    width_for_sprintf = 0;
+  } else {
+    if (spec.align() == ALIGN_LEFT)
+      *format_ptr++ = '-';
+    if (width != 0)
+      *format_ptr++ = '*';
+  }
+  if (spec.precision() >= 0) {
+    *format_ptr++ = '.';
+    *format_ptr++ = '*';
+  }
+
+  append_float_length(format_ptr, value);
+  *format_ptr++ = type;
+  *format_ptr = '\0';
+
+  // Format using snprintf.
+  Char fill = internal::CharTraits<Char>::cast(spec.fill());
+  unsigned n = 0;
+  Char *start = FMT_NULL;
+  for (;;) {
+    std::size_t buffer_size = buffer_.capacity() - offset;
+#if FMT_MSC_VER
+    // MSVC's vsnprintf_s doesn't work with zero size, so reserve
+    // space for at least one extra character to make the size non-zero.
+    // Note that the buffer's capacity will increase by more than 1.
+    if (buffer_size == 0) {
+      buffer_.reserve(offset + 1);
+      buffer_size = buffer_.capacity() - offset;
+    }
+#endif
+    start = &buffer_[offset];
+    int result = internal::CharTraits<Char>::format_float(
+        start, buffer_size, format, width_for_sprintf, spec.precision(), value);
+    if (result >= 0) {
+      n = internal::to_unsigned(result);
+      if (offset + n < buffer_.capacity())
+        break;  // The buffer is large enough - continue with formatting.
+      buffer_.reserve(offset + n + 1);
+    } else {
+      // If result is negative we ask to increase the capacity by at least 1,
+      // but as std::vector, the buffer grows exponentially.
+      buffer_.reserve(buffer_.capacity() + 1);
+    }
+  }
+  if (sign) {
+    if ((spec.align() != ALIGN_RIGHT && spec.align() != ALIGN_DEFAULT) ||
+        *start != ' ') {
+      *(start - 1) = sign;
+      sign = 0;
+    } else {
+      *(start - 1) = fill;
+    }
+    ++n;
+  }
+  if (spec.align() == ALIGN_CENTER && spec.width() > n) {
+    width = spec.width();
+    CharPtr p = grow_buffer(width);
+    std::memmove(get(p) + (width - n) / 2, get(p), n * sizeof(Char));
+    fill_padding(p, spec.width(), n, fill);
+    return;
+  }
+  if (spec.fill() != ' ' || sign) {
+    while (*start == ' ')
+      *start++ = fill;
+    if (sign)
+      *(start - 1) = sign;
+  }
+  grow_buffer(n);
+}
+
+/**
+  \rst
+  This class template provides operations for formatting and writing data
+  into a character stream. The output is stored in a memory buffer that grows
+  dynamically.
+
+  You can use one of the following typedefs for common character types
+  and the standard allocator:
+
+  +---------------+-----------------------------------------------------+
+  | Type          | Definition                                          |
+  +===============+=====================================================+
+  | MemoryWriter  | BasicMemoryWriter<char, std::allocator<char>>       |
+  +---------------+-----------------------------------------------------+
+  | WMemoryWriter | BasicMemoryWriter<wchar_t, std::allocator<wchar_t>> |
+  +---------------+-----------------------------------------------------+
+
+  **Example**::
+
+     MemoryWriter out;
+     out << "The answer is " << 42 << "\n";
+     out.write("({:+f}, {:+f})", -3.14, 3.14);
+
+  This will write the following output to the ``out`` object:
+
+  .. code-block:: none
+
+     The answer is 42
+     (-3.140000, +3.140000)
+
+  The output can be converted to an ``std::string`` with ``out.str()`` or
+  accessed as a C string with ``out.c_str()``.
+  \endrst
+ */
+template <typename Char, typename Allocator = std::allocator<Char> >
+class BasicMemoryWriter : public BasicWriter<Char> {
+ private:
+  internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE, Allocator> buffer_;
+
+ public:
+  explicit BasicMemoryWriter(const Allocator& alloc = Allocator())
+    : BasicWriter<Char>(buffer_), buffer_(alloc) {}
+
+#if FMT_USE_RVALUE_REFERENCES
+  /**
+    \rst
+    Constructs a :class:`fmt::BasicMemoryWriter` object moving the content
+    of the other object to it.
+    \endrst
+   */
+  BasicMemoryWriter(BasicMemoryWriter &&other)
+    : BasicWriter<Char>(buffer_), buffer_(std::move(other.buffer_)) {
+  }
+
+  /**
+    \rst
+    Moves the content of the other ``BasicMemoryWriter`` object to this one.
+    \endrst
+   */
+  BasicMemoryWriter &operator=(BasicMemoryWriter &&other) {
+    buffer_ = std::move(other.buffer_);
+    return *this;
+  }
+#endif
+};
+
+typedef BasicMemoryWriter<char> MemoryWriter;
+typedef BasicMemoryWriter<wchar_t> WMemoryWriter;
+
+/**
+  \rst
+  This class template provides operations for formatting and writing data
+  into a fixed-size array. For writing into a dynamically growing buffer
+  use :class:`fmt::BasicMemoryWriter`.
+
+  Any write method will throw ``std::runtime_error`` if the output doesn't fit
+  into the array.
+
+  You can use one of the following typedefs for common character types:
+
+  +--------------+---------------------------+
+  | Type         | Definition                |
+  +==============+===========================+
+  | ArrayWriter  | BasicArrayWriter<char>    |
+  +--------------+---------------------------+
+  | WArrayWriter | BasicArrayWriter<wchar_t> |
+  +--------------+---------------------------+
+  \endrst
+ */
+template <typename Char>
+class BasicArrayWriter : public BasicWriter<Char> {
+ private:
+  internal::FixedBuffer<Char> buffer_;
+
+ public:
+  /**
+   \rst
+   Constructs a :class:`fmt::BasicArrayWriter` object for *array* of the
+   given size.
+   \endrst
+   */
+  BasicArrayWriter(Char *array, std::size_t size)
+    : BasicWriter<Char>(buffer_), buffer_(array, size) {}
+
+  /**
+   \rst
+   Constructs a :class:`fmt::BasicArrayWriter` object for *array* of the
+   size known at compile time.
+   \endrst
+   */
+  template <std::size_t SIZE>
+  explicit BasicArrayWriter(Char (&array)[SIZE])
+    : BasicWriter<Char>(buffer_), buffer_(array, SIZE) {}
+};
+
+typedef BasicArrayWriter<char> ArrayWriter;
+typedef BasicArrayWriter<wchar_t> WArrayWriter;
+
+// Reports a system error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_system_error(int error_code,
+                                 StringRef message) FMT_NOEXCEPT;
+
+#if FMT_USE_WINDOWS_H
+
+/** A Windows error. */
+class WindowsError : public SystemError {
+ private:
+  FMT_API void init(int error_code, CStringRef format_str, ArgList args);
+
+ public:
+  /**
+   \rst
+   Constructs a :class:`fmt::WindowsError` object with the description
+   of the form
+
+   .. parsed-literal::
+     *<message>*: *<system-message>*
+
+   where *<message>* is the formatted message and *<system-message>* is the
+   system message corresponding to the error code.
+   *error_code* is a Windows error code as given by ``GetLastError``.
+   If *error_code* is not a valid error code such as -1, the system message
+   will look like "error -1".
+
+   **Example**::
+
+     // This throws a WindowsError with the description
+     //   cannot open file 'madeup': The system cannot find the file specified.
+     // or similar (system message may vary).
+     const char *filename = "madeup";
+     LPOFSTRUCT of = LPOFSTRUCT();
+     HFILE file = OpenFile(filename, &of, OF_READ);
+     if (file == HFILE_ERROR) {
+       throw fmt::WindowsError(GetLastError(),
+                               "cannot open file '{}'", filename);
+     }
+   \endrst
+  */
+  WindowsError(int error_code, CStringRef message) {
+    init(error_code, message, ArgList());
+  }
+  FMT_VARIADIC_CTOR(WindowsError, init, int, CStringRef)
+};
+
+// Reports a Windows error without throwing an exception.
+// Can be used to report errors from destructors.
+FMT_API void report_windows_error(int error_code,
+                                  StringRef message) FMT_NOEXCEPT;
+
+#endif
+
+enum Color { BLACK, RED, GREEN, YELLOW, BLUE, MAGENTA, CYAN, WHITE };
+
+/**
+  Formats a string and prints it to stdout using ANSI escape sequences
+  to specify color (experimental).
+  Example:
+    print_colored(fmt::RED, "Elapsed time: {0:.2f} seconds", 1.23);
+ */
+FMT_API void print_colored(Color c, CStringRef format, ArgList args);
+
+/**
+  \rst
+  Formats arguments and returns the result as a string.
+
+  **Example**::
+
+    std::string message = format("The answer is {}", 42);
+  \endrst
+*/
+inline std::string format(CStringRef format_str, ArgList args) {
+  MemoryWriter w;
+  w.write(format_str, args);
+  return w.str();
+}
+
+inline std::wstring format(WCStringRef format_str, ArgList args) {
+  WMemoryWriter w;
+  w.write(format_str, args);
+  return w.str();
+}
+
+/**
+  \rst
+  Prints formatted data to the file *f*.
+
+  **Example**::
+
+    print(stderr, "Don't {}!", "panic");
+  \endrst
+ */
+FMT_API void print(std::FILE *f, CStringRef format_str, ArgList args);
+
+/**
+  \rst
+  Prints formatted data to ``stdout``.
+
+  **Example**::
+
+    print("Elapsed time: {0:.2f} seconds", 1.23);
+  \endrst
+ */
+FMT_API void print(CStringRef format_str, ArgList args);
+
+/**
+  Fast integer formatter.
+ */
+class FormatInt {
+ private:
+  // Buffer should be large enough to hold all digits (digits10 + 1),
+  // a sign and a null character.
+  enum {BUFFER_SIZE = std::numeric_limits<ULongLong>::digits10 + 3};
+  mutable char buffer_[BUFFER_SIZE];
+  char *str_;
+
+  // Formats value in reverse and returns the number of digits.
+  char *format_decimal(ULongLong value) {
+    char *buffer_end = buffer_ + BUFFER_SIZE - 1;
+    while (value >= 100) {
+      // Integer division is slow so do it for a group of two digits instead
+      // of for every digit. The idea comes from the talk by Alexandrescu
+      // "Three Optimization Tips for C++". See speed-test for a comparison.
+      unsigned index = static_cast<unsigned>((value % 100) * 2);
+      value /= 100;
+      *--buffer_end = internal::Data::DIGITS[index + 1];
+      *--buffer_end = internal::Data::DIGITS[index];
+    }
+    if (value < 10) {
+      *--buffer_end = static_cast<char>('0' + value);
+      return buffer_end;
+    }
+    unsigned index = static_cast<unsigned>(value * 2);
+    *--buffer_end = internal::Data::DIGITS[index + 1];
+    *--buffer_end = internal::Data::DIGITS[index];
+    return buffer_end;
+  }
+
+  void FormatSigned(LongLong value) {
+    ULongLong abs_value = static_cast<ULongLong>(value);
+    bool negative = value < 0;
+    if (negative)
+      abs_value = 0 - abs_value;
+    str_ = format_decimal(abs_value);
+    if (negative)
+      *--str_ = '-';
+  }
+
+ public:
+  explicit FormatInt(int value) { FormatSigned(value); }
+  explicit FormatInt(long value) { FormatSigned(value); }
+  explicit FormatInt(LongLong value) { FormatSigned(value); }
+  explicit FormatInt(unsigned value) : str_(format_decimal(value)) {}
+  explicit FormatInt(unsigned long value) : str_(format_decimal(value)) {}
+  explicit FormatInt(ULongLong value) : str_(format_decimal(value)) {}
+
+  /** Returns the number of characters written to the output buffer. */
+  std::size_t size() const {
+    return internal::to_unsigned(buffer_ - str_ + BUFFER_SIZE - 1);
+  }
+
+  /**
+    Returns a pointer to the output buffer content. No terminating null
+    character is appended.
+   */
+  const char *data() const { return str_; }
+
+  /**
+    Returns a pointer to the output buffer content with terminating null
+    character appended.
+   */
+  const char *c_str() const {
+    buffer_[BUFFER_SIZE - 1] = '\0';
+    return str_;
+  }
+
+  /**
+    \rst
+    Returns the content of the output buffer as an ``std::string``.
+    \endrst
+   */
+  std::string str() const { return std::string(str_, size()); }
+};
+
+// Formats a decimal integer value writing into buffer and returns
+// a pointer to the end of the formatted string. This function doesn't
+// write a terminating null character.
+template <typename T>
+inline void format_decimal(char *&buffer, T value) {
+  typedef typename internal::IntTraits<T>::MainType MainType;
+  MainType abs_value = static_cast<MainType>(value);
+  if (internal::is_negative(value)) {
+    *buffer++ = '-';
+    abs_value = 0 - abs_value;
+  }
+  if (abs_value < 100) {
+    if (abs_value < 10) {
+      *buffer++ = static_cast<char>('0' + abs_value);
+      return;
+    }
+    unsigned index = static_cast<unsigned>(abs_value * 2);
+    *buffer++ = internal::Data::DIGITS[index];
+    *buffer++ = internal::Data::DIGITS[index + 1];
+    return;
+  }
+  unsigned num_digits = internal::count_digits(abs_value);
+  internal::format_decimal(buffer, abs_value, num_digits);
+  buffer += num_digits;
+}
+
+/**
+  \rst
+  Returns a named argument for formatting functions.
+
+  **Example**::
+
+    print("Elapsed time: {s:.2f} seconds", arg("s", 1.23));
+
+  \endrst
+ */
+template <typename T>
+inline internal::NamedArgWithType<char, T> arg(StringRef name, const T &arg) {
+  return internal::NamedArgWithType<char, T>(name, arg);
+}
+
+template <typename T>
+inline internal::NamedArgWithType<wchar_t, T> arg(WStringRef name, const T &arg) {
+  return internal::NamedArgWithType<wchar_t, T>(name, arg);
+}
+
+// The following two functions are deleted intentionally to disable
+// nested named arguments as in ``format("{}", arg("a", arg("b", 42)))``.
+template <typename Char>
+void arg(StringRef, const internal::NamedArg<Char>&) FMT_DELETED_OR_UNDEFINED;
+template <typename Char>
+void arg(WStringRef, const internal::NamedArg<Char>&) FMT_DELETED_OR_UNDEFINED;
+}
+
+#if FMT_GCC_VERSION
+// Use the system_header pragma to suppress warnings about variadic macros
+// because suppressing -Wvariadic-macros with the diagnostic pragma doesn't
+// work. It is used at the end because we want to suppress as little warnings
+// as possible.
+# pragma GCC system_header
+#endif
+
+// This is used to work around VC++ bugs in handling variadic macros.
+#define FMT_EXPAND(args) args
+
+// Returns the number of arguments.
+// Based on https://groups.google.com/forum/#!topic/comp.std.c/d-6Mj5Lko_s.
+#define FMT_NARG(...) FMT_NARG_(__VA_ARGS__, FMT_RSEQ_N())
+#define FMT_NARG_(...) FMT_EXPAND(FMT_ARG_N(__VA_ARGS__))
+#define FMT_ARG_N(_1, _2, _3, _4, _5, _6, _7, _8, _9, _10, N, ...) N
+#define FMT_RSEQ_N() 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0
+
+#define FMT_FOR_EACH_(N, f, ...) \
+  FMT_EXPAND(FMT_CONCAT(FMT_FOR_EACH, N)(f, __VA_ARGS__))
+#define FMT_FOR_EACH(f, ...) \
+  FMT_EXPAND(FMT_FOR_EACH_(FMT_NARG(__VA_ARGS__), f, __VA_ARGS__))
+
+#define FMT_ADD_ARG_NAME(type, index) type arg##index
+#define FMT_GET_ARG_NAME(type, index) arg##index
+
+#if FMT_USE_VARIADIC_TEMPLATES
+# define FMT_VARIADIC_(Const, Char, ReturnType, func, call, ...) \
+  template <typename... Args> \
+  ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
+      const Args & ... args) Const { \
+    typedef fmt::internal::ArgArray<sizeof...(Args)> ArgArray; \
+    typename ArgArray::Type array{ \
+      ArgArray::template make<fmt::BasicFormatter<Char> >(args)...}; \
+    call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), \
+      fmt::ArgList(fmt::internal::make_type(args...), array)); \
+  }
+#else
+// Defines a wrapper for a function taking __VA_ARGS__ arguments
+// and n additional arguments of arbitrary types.
+# define FMT_WRAP(Const, Char, ReturnType, func, call, n, ...) \
+  template <FMT_GEN(n, FMT_MAKE_TEMPLATE_ARG)> \
+  inline ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__), \
+      FMT_GEN(n, FMT_MAKE_ARG)) Const { \
+    fmt::internal::ArgArray<n>::Type arr; \
+    FMT_GEN(n, FMT_ASSIGN_##Char); \
+    call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), fmt::ArgList( \
+      fmt::internal::make_type(FMT_GEN(n, FMT_MAKE_REF2)), arr)); \
+  }
+
+# define FMT_VARIADIC_(Const, Char, ReturnType, func, call, ...) \
+  inline ReturnType func(FMT_FOR_EACH(FMT_ADD_ARG_NAME, __VA_ARGS__)) Const { \
+    call(FMT_FOR_EACH(FMT_GET_ARG_NAME, __VA_ARGS__), fmt::ArgList()); \
+  } \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 1, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 2, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 3, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 4, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 5, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 6, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 7, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 8, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 9, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 10, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 11, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 12, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 13, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 14, __VA_ARGS__) \
+  FMT_WRAP(Const, Char, ReturnType, func, call, 15, __VA_ARGS__)
+#endif  // FMT_USE_VARIADIC_TEMPLATES
+
+/**
+  \rst
+  Defines a variadic function with the specified return type, function name
+  and argument types passed as variable arguments to this macro.
+
+  **Example**::
+
+    void print_error(const char *file, int line, const char *format,
+                     fmt::ArgList args) {
+      fmt::print("{}: {}: ", file, line);
+      fmt::print(format, args);
+    }
+    FMT_VARIADIC(void, print_error, const char *, int, const char *)
+
+  ``FMT_VARIADIC`` is used for compatibility with legacy C++ compilers that
+  don't implement variadic templates. You don't have to use this macro if
+  you don't need legacy compiler support and can use variadic templates
+  directly::
+
+    template <typename... Args>
+    void print_error(const char *file, int line, const char *format,
+                     const Args & ... args) {
+      fmt::print("{}: {}: ", file, line);
+      fmt::print(format, args...);
+    }
+  \endrst
+ */
+#define FMT_VARIADIC(ReturnType, func, ...) \
+  FMT_VARIADIC_(, char, ReturnType, func, return func, __VA_ARGS__)
+
+#define FMT_VARIADIC_CONST(ReturnType, func, ...) \
+  FMT_VARIADIC_(const, char, ReturnType, func, return func, __VA_ARGS__)
+
+#define FMT_VARIADIC_W(ReturnType, func, ...) \
+  FMT_VARIADIC_(, wchar_t, ReturnType, func, return func, __VA_ARGS__)
+
+#define FMT_VARIADIC_CONST_W(ReturnType, func, ...) \
+  FMT_VARIADIC_(const, wchar_t, ReturnType, func, return func, __VA_ARGS__)
+
+#define FMT_CAPTURE_ARG_(id, index) ::fmt::arg(#id, id)
+
+#define FMT_CAPTURE_ARG_W_(id, index) ::fmt::arg(L###id, id)
+
+/**
+  \rst
+  Convenient macro to capture the arguments' names and values into several
+  ``fmt::arg(name, value)``.
+
+  **Example**::
+
+    int x = 1, y = 2;
+    print("point: ({x}, {y})", FMT_CAPTURE(x, y));
+    // same as:
+    // print("point: ({x}, {y})", arg("x", x), arg("y", y));
+
+  \endrst
+ */
+#define FMT_CAPTURE(...) FMT_FOR_EACH(FMT_CAPTURE_ARG_, __VA_ARGS__)
+
+#define FMT_CAPTURE_W(...) FMT_FOR_EACH(FMT_CAPTURE_ARG_W_, __VA_ARGS__)
+
+namespace fmt {
+FMT_VARIADIC(std::string, format, CStringRef)
+FMT_VARIADIC_W(std::wstring, format, WCStringRef)
+FMT_VARIADIC(void, print, CStringRef)
+FMT_VARIADIC(void, print, std::FILE *, CStringRef)
+FMT_VARIADIC(void, print_colored, Color, CStringRef)
+
+namespace internal {
+template <typename Char>
+inline bool is_name_start(Char c) {
+  return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || '_' == c;
+}
+
+// Parses an unsigned integer advancing s to the end of the parsed input.
+// This function assumes that the first character of s is a digit.
+template <typename Char>
+unsigned parse_nonnegative_int(const Char *&s) {
+  assert('0' <= *s && *s <= '9');
+  unsigned value = 0;
+  // Convert to unsigned to prevent a warning.
+  unsigned max_int = (std::numeric_limits<int>::max)();
+  unsigned big = max_int / 10;
+  do {
+    // Check for overflow.
+    if (value > big) {
+      value = max_int + 1;
+      break;
+    }
+    value = value * 10 + (*s - '0');
+    ++s;
+  } while ('0' <= *s && *s <= '9');
+  // Convert to unsigned to prevent a warning.
+  if (value > max_int)
+    FMT_THROW(FormatError("number is too big"));
+  return value;
+}
+
+inline void require_numeric_argument(const Arg &arg, char spec) {
+  if (arg.type > Arg::LAST_NUMERIC_TYPE) {
+    std::string message =
+        fmt::format("format specifier '{}' requires numeric argument", spec);
+    FMT_THROW(fmt::FormatError(message));
+  }
+}
+
+template <typename Char>
+void check_sign(const Char *&s, const Arg &arg) {
+  char sign = static_cast<char>(*s);
+  require_numeric_argument(arg, sign);
+  if (arg.type == Arg::UINT || arg.type == Arg::ULONG_LONG) {
+    FMT_THROW(FormatError(fmt::format(
+      "format specifier '{}' requires signed argument", sign)));
+  }
+  ++s;
+}
+}  // namespace internal
+
+template <typename Char, typename AF>
+inline internal::Arg BasicFormatter<Char, AF>::get_arg(
+    BasicStringRef<Char> arg_name, const char *&error) {
+  if (check_no_auto_index(error)) {
+    map_.init(args());
+    const internal::Arg *arg = map_.find(arg_name);
+    if (arg)
+      return *arg;
+    error = "argument not found";
+  }
+  return internal::Arg();
+}
+
+template <typename Char, typename AF>
+inline internal::Arg BasicFormatter<Char, AF>::parse_arg_index(const Char *&s) {
+  const char *error = FMT_NULL;
+  internal::Arg arg = *s < '0' || *s > '9' ?
+        next_arg(error) : get_arg(internal::parse_nonnegative_int(s), error);
+  if (error) {
+    FMT_THROW(FormatError(
+                *s != '}' && *s != ':' ? "invalid format string" : error));
+  }
+  return arg;
+}
+
+template <typename Char, typename AF>
+inline internal::Arg BasicFormatter<Char, AF>::parse_arg_name(const Char *&s) {
+  assert(internal::is_name_start(*s));
+  const Char *start = s;
+  Char c;
+  do {
+    c = *++s;
+  } while (internal::is_name_start(c) || ('0' <= c && c <= '9'));
+  const char *error = FMT_NULL;
+  internal::Arg arg = get_arg(BasicStringRef<Char>(start, s - start), error);
+  if (error)
+    FMT_THROW(FormatError(error));
+  return arg;
+}
+
+template <typename Char, typename ArgFormatter>
+const Char *BasicFormatter<Char, ArgFormatter>::format(
+    const Char *&format_str, const internal::Arg &arg) {
+  using internal::Arg;
+  const Char *s = format_str;
+  typename ArgFormatter::SpecType spec;
+  if (*s == ':') {
+    if (arg.type == Arg::CUSTOM) {
+      arg.custom.format(this, arg.custom.value, &s);
+      return s;
+    }
+    ++s;
+    // Parse fill and alignment.
+    if (Char c = *s) {
+      const Char *p = s + 1;
+      spec.align_ = ALIGN_DEFAULT;
+      do {
+        switch (*p) {
+          case '<':
+            spec.align_ = ALIGN_LEFT;
+            break;
+          case '>':
+            spec.align_ = ALIGN_RIGHT;
+            break;
+          case '=':
+            spec.align_ = ALIGN_NUMERIC;
+            break;
+          case '^':
+            spec.align_ = ALIGN_CENTER;
+            break;
+        }
+        if (spec.align_ != ALIGN_DEFAULT) {
+          if (p != s) {
+            if (c == '}') break;
+            if (c == '{')
+              FMT_THROW(FormatError("invalid fill character '{'"));
+            s += 2;
+            spec.fill_ = c;
+          } else ++s;
+          if (spec.align_ == ALIGN_NUMERIC)
+            require_numeric_argument(arg, '=');
+          break;
+        }
+      } while (--p >= s);
+    }
+
+    // Parse sign.
+    switch (*s) {
+      case '+':
+        check_sign(s, arg);
+        spec.flags_ |= SIGN_FLAG | PLUS_FLAG;
+        break;
+      case '-':
+        check_sign(s, arg);
+        spec.flags_ |= MINUS_FLAG;
+        break;
+      case ' ':
+        check_sign(s, arg);
+        spec.flags_ |= SIGN_FLAG;
+        break;
+    }
+
+    if (*s == '#') {
+      require_numeric_argument(arg, '#');
+      spec.flags_ |= HASH_FLAG;
+      ++s;
+    }
+
+    // Parse zero flag.
+    if (*s == '0') {
+      require_numeric_argument(arg, '0');
+      spec.align_ = ALIGN_NUMERIC;
+      spec.fill_ = '0';
+      ++s;
+    }
+
+    // Parse width.
+    if ('0' <= *s && *s <= '9') {
+      spec.width_ = internal::parse_nonnegative_int(s);
+    } else if (*s == '{') {
+      ++s;
+      Arg width_arg = internal::is_name_start(*s) ?
+            parse_arg_name(s) : parse_arg_index(s);
+      if (*s++ != '}')
+        FMT_THROW(FormatError("invalid format string"));
+      ULongLong value = 0;
+      switch (width_arg.type) {
+      case Arg::INT:
+        if (width_arg.int_value < 0)
+          FMT_THROW(FormatError("negative width"));
+        value = width_arg.int_value;
+        break;
+      case Arg::UINT:
+        value = width_arg.uint_value;
+        break;
+      case Arg::LONG_LONG:
+        if (width_arg.long_long_value < 0)
+          FMT_THROW(FormatError("negative width"));
+        value = width_arg.long_long_value;
+        break;
+      case Arg::ULONG_LONG:
+        value = width_arg.ulong_long_value;
+        break;
+      default:
+        FMT_THROW(FormatError("width is not integer"));
+      }
+      unsigned max_int = (std::numeric_limits<int>::max)();
+      if (value > max_int)
+        FMT_THROW(FormatError("number is too big"));
+      spec.width_ = static_cast<int>(value);
+    }
+
+    // Parse precision.
+    if (*s == '.') {
+      ++s;
+      spec.precision_ = 0;
+      if ('0' <= *s && *s <= '9') {
+        spec.precision_ = internal::parse_nonnegative_int(s);
+      } else if (*s == '{') {
+        ++s;
+        Arg precision_arg = internal::is_name_start(*s) ?
+              parse_arg_name(s) : parse_arg_index(s);
+        if (*s++ != '}')
+          FMT_THROW(FormatError("invalid format string"));
+        ULongLong value = 0;
+        switch (precision_arg.type) {
+          case Arg::INT:
+            if (precision_arg.int_value < 0)
+              FMT_THROW(FormatError("negative precision"));
+            value = precision_arg.int_value;
+            break;
+          case Arg::UINT:
+            value = precision_arg.uint_value;
+            break;
+          case Arg::LONG_LONG:
+            if (precision_arg.long_long_value < 0)
+              FMT_THROW(FormatError("negative precision"));
+            value = precision_arg.long_long_value;
+            break;
+          case Arg::ULONG_LONG:
+            value = precision_arg.ulong_long_value;
+            break;
+          default:
+            FMT_THROW(FormatError("precision is not integer"));
+        }
+        unsigned max_int = (std::numeric_limits<int>::max)();
+        if (value > max_int)
+          FMT_THROW(FormatError("number is too big"));
+        spec.precision_ = static_cast<int>(value);
+      } else {
+        FMT_THROW(FormatError("missing precision specifier"));
+      }
+      if (arg.type <= Arg::LAST_INTEGER_TYPE || arg.type == Arg::POINTER) {
+        FMT_THROW(FormatError(
+            fmt::format("precision not allowed in {} format specifier",
+            arg.type == Arg::POINTER ? "pointer" : "integer")));
+      }
+    }
+
+    // Parse type.
+    if (*s != '}' && *s)
+      spec.type_ = static_cast<char>(*s++);
+  }
+
+  if (*s++ != '}')
+    FMT_THROW(FormatError("missing '}' in format string"));
+
+  // Format argument.
+  ArgFormatter(*this, spec, s - 1).visit(arg);
+  return s;
+}
+
+template <typename Char, typename AF>
+void BasicFormatter<Char, AF>::format(BasicCStringRef<Char> format_str) {
+  const Char *s = format_str.c_str();
+  const Char *start = s;
+  while (*s) {
+    Char c = *s++;
+    if (c != '{' && c != '}') continue;
+    if (*s == c) {
+      write(writer_, start, s);
+      start = ++s;
+      continue;
+    }
+    if (c == '}')
+      FMT_THROW(FormatError("unmatched '}' in format string"));
+    write(writer_, start, s - 1);
+    internal::Arg arg = internal::is_name_start(*s) ?
+          parse_arg_name(s) : parse_arg_index(s);
+    start = s = format(s, arg);
+  }
+  write(writer_, start, s);
+}
+
+template <typename Char, typename It>
+struct ArgJoin {
+  It first;
+  It last;
+  BasicCStringRef<Char> sep;
+
+  ArgJoin(It first, It last, const BasicCStringRef<Char>& sep) :
+    first(first),
+    last(last),
+    sep(sep) {}
+};
+
+template <typename It>
+ArgJoin<char, It> join(It first, It last, const BasicCStringRef<char>& sep) {
+  return ArgJoin<char, It>(first, last, sep);
+}
+
+template <typename It>
+ArgJoin<wchar_t, It> join(It first, It last, const BasicCStringRef<wchar_t>& sep) {
+  return ArgJoin<wchar_t, It>(first, last, sep);
+}
+
+#if FMT_HAS_GXX_CXX11
+template <typename Range>
+auto join(const Range& range, const BasicCStringRef<char>& sep)
+    -> ArgJoin<char, decltype(std::begin(range))> {
+  return join(std::begin(range), std::end(range), sep);
+}
+
+template <typename Range>
+auto join(const Range& range, const BasicCStringRef<wchar_t>& sep)
+    -> ArgJoin<wchar_t, decltype(std::begin(range))> {
+  return join(std::begin(range), std::end(range), sep);
+}
+#endif
+
+template <typename ArgFormatter, typename Char, typename It>
+void format_arg(fmt::BasicFormatter<Char, ArgFormatter> &f,
+    const Char *&format_str, const ArgJoin<Char, It>& e) {
+  const Char* end = format_str;
+  if (*end == ':')
+    ++end;
+  while (*end && *end != '}')
+    ++end;
+  if (*end != '}')
+    FMT_THROW(FormatError("missing '}' in format string"));
+
+  It it = e.first;
+  if (it != e.last) {
+    const Char* save = format_str;
+    f.format(format_str, internal::MakeArg<fmt::BasicFormatter<Char, ArgFormatter> >(*it++));
+    while (it != e.last) {
+      f.writer().write(e.sep);
+      format_str = save;
+      f.format(format_str, internal::MakeArg<fmt::BasicFormatter<Char, ArgFormatter> >(*it++));
+    }
+  }
+  format_str = end + 1;
+}
+}  // namespace fmt
+
+#if FMT_USE_USER_DEFINED_LITERALS
+namespace fmt {
+namespace internal {
+
+template <typename Char>
+struct UdlFormat {
+  const Char *str;
+
+  template <typename... Args>
+  auto operator()(Args && ... args) const
+                  -> decltype(format(str, std::forward<Args>(args)...)) {
+    return format(str, std::forward<Args>(args)...);
+  }
+};
+
+template <typename Char>
+struct UdlArg {
+  const Char *str;
+
+  template <typename T>
+  NamedArgWithType<Char, T> operator=(T &&value) const {
+    return {str, std::forward<T>(value)};
+  }
+};
+
+} // namespace internal
+
+inline namespace literals {
+
+/**
+  \rst
+  C++11 literal equivalent of :func:`fmt::format`.
+
+  **Example**::
+
+    using namespace fmt::literals;
+    std::string message = "The answer is {}"_format(42);
+  \endrst
+ */
+inline internal::UdlFormat<char>
+operator"" _format(const char *s, std::size_t) { return {s}; }
+inline internal::UdlFormat<wchar_t>
+operator"" _format(const wchar_t *s, std::size_t) { return {s}; }
+
+/**
+  \rst
+  C++11 literal equivalent of :func:`fmt::arg`.
+
+  **Example**::
+
+    using namespace fmt::literals;
+    print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
+  \endrst
+ */
+inline internal::UdlArg<char>
+operator"" _a(const char *s, std::size_t) { return {s}; }
+inline internal::UdlArg<wchar_t>
+operator"" _a(const wchar_t *s, std::size_t) { return {s}; }
+
+} // inline namespace literals
+} // namespace fmt
+#endif // FMT_USE_USER_DEFINED_LITERALS
+
+// Restore warnings.
+#if FMT_GCC_VERSION >= 406
+# pragma GCC diagnostic pop
+#endif
+
+#if defined(__clang__) && !defined(FMT_ICC_VERSION)
+# pragma clang diagnostic pop
+#endif
+
+#ifdef FMT_HEADER_ONLY
+# define FMT_FUNC inline
+# include "format.cc"
+#else
+# define FMT_FUNC
+#endif
+
+#endif  // FMT_FORMAT_H_
diff --git a/3party/fmt/fmt/ostream.cc b/3party/fmt/fmt/ostream.cc
new file mode 100644
index 0000000..2d443f7
--- /dev/null
+++ b/3party/fmt/fmt/ostream.cc
@@ -0,0 +1,35 @@
+/*
+ Formatting library for C++ - std::ostream support
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#include "ostream.h"
+
+namespace fmt {
+
+namespace internal {
+FMT_FUNC void write(std::ostream &os, Writer &w) {
+  const char *data = w.data();
+  typedef internal::MakeUnsigned<std::streamsize>::Type UnsignedStreamSize;
+  UnsignedStreamSize size = w.size();
+  UnsignedStreamSize max_size =
+      internal::to_unsigned((std::numeric_limits<std::streamsize>::max)());
+  do {
+    UnsignedStreamSize n = size <= max_size ? size : max_size;
+    os.write(data, static_cast<std::streamsize>(n));
+    data += n;
+    size -= n;
+  } while (size != 0);
+}
+}
+
+FMT_FUNC void print(std::ostream &os, CStringRef format_str, ArgList args) {
+  MemoryWriter w;
+  w.write(format_str, args);
+  internal::write(os, w);
+}
+}  // namespace fmt
diff --git a/3party/fmt/fmt/ostream.h b/3party/fmt/fmt/ostream.h
new file mode 100644
index 0000000..6848aac
--- /dev/null
+++ b/3party/fmt/fmt/ostream.h
@@ -0,0 +1,108 @@
+/*
+ Formatting library for C++ - std::ostream support
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#ifndef FMT_OSTREAM_H_
+#define FMT_OSTREAM_H_
+
+#include "format.h"
+#include <ostream>
+
+namespace fmt {
+
+namespace internal {
+
+template <class Char>
+class FormatBuf : public std::basic_streambuf<Char> {
+ private:
+  typedef typename std::basic_streambuf<Char>::int_type int_type;
+  typedef typename std::basic_streambuf<Char>::traits_type traits_type;
+
+  Buffer<Char> &buffer_;
+
+ public:
+  FormatBuf(Buffer<Char> &buffer) : buffer_(buffer) {}
+
+ protected:
+  // The put-area is actually always empty. This makes the implementation
+  // simpler and has the advantage that the streambuf and the buffer are always
+  // in sync and sputc never writes into uninitialized memory. The obvious
+  // disadvantage is that each call to sputc always results in a (virtual) call
+  // to overflow. There is no disadvantage here for sputn since this always
+  // results in a call to xsputn.
+
+  int_type overflow(int_type ch = traits_type::eof()) FMT_OVERRIDE {
+    if (!traits_type::eq_int_type(ch, traits_type::eof()))
+      buffer_.push_back(static_cast<Char>(ch));
+    return ch;
+  }
+
+  std::streamsize xsputn(const Char *s, std::streamsize count) FMT_OVERRIDE {
+    buffer_.append(s, s + count);
+    return count;
+  }
+};
+
+Yes &convert(std::ostream &);
+
+struct DummyStream : std::ostream {
+  DummyStream();  // Suppress a bogus warning in MSVC.
+
+  // Hide all operator<< overloads from std::ostream.
+  template <typename T>
+  typename EnableIf<sizeof(T) == 0>::type operator<<(const T &);
+};
+
+No &operator<<(std::ostream &, int);
+
+template <typename T>
+struct ConvertToIntImpl<T, true> {
+  // Convert to int only if T doesn't have an overloaded operator<<.
+  enum {
+    value = sizeof(convert(get<DummyStream>() << get<T>())) == sizeof(No)
+  };
+};
+
+// Write the content of w to os.
+FMT_API void write(std::ostream &os, Writer &w);
+}  // namespace internal
+
+// Formats a value.
+template <typename Char, typename ArgFormatter_, typename T>
+void format_arg(BasicFormatter<Char, ArgFormatter_> &f,
+                const Char *&format_str, const T &value) {
+  internal::MemoryBuffer<Char, internal::INLINE_BUFFER_SIZE> buffer;
+
+  internal::FormatBuf<Char> format_buf(buffer);
+  std::basic_ostream<Char> output(&format_buf);
+  output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
+  output << value;
+
+  BasicStringRef<Char> str(&buffer[0], buffer.size());
+  typedef internal::MakeArg< BasicFormatter<Char> > MakeArg;
+  format_str = f.format(format_str, MakeArg(str));
+}
+
+/**
+  \rst
+  Prints formatted data to the stream *os*.
+
+  **Example**::
+
+    print(cerr, "Don't {}!", "panic");
+  \endrst
+ */
+FMT_API void print(std::ostream &os, CStringRef format_str, ArgList args);
+FMT_VARIADIC(void, print, std::ostream &, CStringRef)
+}  // namespace fmt
+
+#ifdef FMT_HEADER_ONLY
+# include "ostream.cc"
+#endif
+
+#endif  // FMT_OSTREAM_H_
diff --git a/3party/fmt/fmt/posix.cc b/3party/fmt/fmt/posix.cc
new file mode 100644
index 0000000..356668c
--- /dev/null
+++ b/3party/fmt/fmt/posix.cc
@@ -0,0 +1,241 @@
+/*
+ A C++ interface to POSIX functions.
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+// Disable bogus MSVC warnings.
+#ifndef _CRT_SECURE_NO_WARNINGS
+# define _CRT_SECURE_NO_WARNINGS
+#endif
+
+#include "posix.h"
+
+#include <limits.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#ifndef _WIN32
+# include <unistd.h>
+#else
+# ifndef WIN32_LEAN_AND_MEAN
+#  define WIN32_LEAN_AND_MEAN
+# endif
+# include <windows.h>
+# include <io.h>
+
+# define O_CREAT _O_CREAT
+# define O_TRUNC _O_TRUNC
+
+# ifndef S_IRUSR
+#  define S_IRUSR _S_IREAD
+# endif
+
+# ifndef S_IWUSR
+#  define S_IWUSR _S_IWRITE
+# endif
+
+# ifdef __MINGW32__
+#  define _SH_DENYNO 0x40
+# endif
+
+#endif  // _WIN32
+
+#ifdef fileno
+# undef fileno
+#endif
+
+namespace {
+#ifdef _WIN32
+// Return type of read and write functions.
+typedef int RWResult;
+
+// On Windows the count argument to read and write is unsigned, so convert
+// it from size_t preventing integer overflow.
+inline unsigned convert_rwcount(std::size_t count) {
+  return count <= UINT_MAX ? static_cast<unsigned>(count) : UINT_MAX;
+}
+#else
+// Return type of read and write functions.
+typedef ssize_t RWResult;
+
+inline std::size_t convert_rwcount(std::size_t count) { return count; }
+#endif
+}
+
+fmt::BufferedFile::~BufferedFile() FMT_NOEXCEPT {
+  if (file_ && FMT_SYSTEM(fclose(file_)) != 0)
+    fmt::report_system_error(errno, "cannot close file");
+}
+
+fmt::BufferedFile::BufferedFile(
+    fmt::CStringRef filename, fmt::CStringRef mode) {
+  FMT_RETRY_VAL(file_, FMT_SYSTEM(fopen(filename.c_str(), mode.c_str())), 0);
+  if (!file_)
+    FMT_THROW(SystemError(errno, "cannot open file {}", filename));
+}
+
+void fmt::BufferedFile::close() {
+  if (!file_)
+    return;
+  int result = FMT_SYSTEM(fclose(file_));
+  file_ = FMT_NULL;
+  if (result != 0)
+    FMT_THROW(SystemError(errno, "cannot close file"));
+}
+
+// A macro used to prevent expansion of fileno on broken versions of MinGW.
+#define FMT_ARGS
+
+int fmt::BufferedFile::fileno() const {
+  int fd = FMT_POSIX_CALL(fileno FMT_ARGS(file_));
+  if (fd == -1)
+    FMT_THROW(SystemError(errno, "cannot get file descriptor"));
+  return fd;
+}
+
+fmt::File::File(fmt::CStringRef path, int oflag) {
+  int mode = S_IRUSR | S_IWUSR;
+#if defined(_WIN32) && !defined(__MINGW32__)
+  fd_ = -1;
+  FMT_POSIX_CALL(sopen_s(&fd_, path.c_str(), oflag, _SH_DENYNO, mode));
+#else
+  FMT_RETRY(fd_, FMT_POSIX_CALL(open(path.c_str(), oflag, mode)));
+#endif
+  if (fd_ == -1)
+    FMT_THROW(SystemError(errno, "cannot open file {}", path));
+}
+
+fmt::File::~File() FMT_NOEXCEPT {
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  if (fd_ != -1 && FMT_POSIX_CALL(close(fd_)) != 0)
+    fmt::report_system_error(errno, "cannot close file");
+}
+
+void fmt::File::close() {
+  if (fd_ == -1)
+    return;
+  // Don't retry close in case of EINTR!
+  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
+  int result = FMT_POSIX_CALL(close(fd_));
+  fd_ = -1;
+  if (result != 0)
+    FMT_THROW(SystemError(errno, "cannot close file"));
+}
+
+fmt::LongLong fmt::File::size() const {
+#ifdef _WIN32
+  // Use GetFileSize instead of GetFileSizeEx for the case when _WIN32_WINNT
+  // is less than 0x0500 as is the case with some default MinGW builds.
+  // Both functions support large file sizes.
+  DWORD size_upper = 0;
+  HANDLE handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd_));
+  DWORD size_lower = FMT_SYSTEM(GetFileSize(handle, &size_upper));
+  if (size_lower == INVALID_FILE_SIZE) {
+    DWORD error = GetLastError();
+    if (error != NO_ERROR)
+      FMT_THROW(WindowsError(GetLastError(), "cannot get file size"));
+  }
+  fmt::ULongLong long_size = size_upper;
+  return (long_size << sizeof(DWORD) * CHAR_BIT) | size_lower;
+#else
+  typedef struct stat Stat;
+  Stat file_stat = Stat();
+  if (FMT_POSIX_CALL(fstat(fd_, &file_stat)) == -1)
+    FMT_THROW(SystemError(errno, "cannot get file attributes"));
+  FMT_STATIC_ASSERT(sizeof(fmt::LongLong) >= sizeof(file_stat.st_size),
+      "return type of File::size is not large enough");
+  return file_stat.st_size;
+#endif
+}
+
+std::size_t fmt::File::read(void *buffer, std::size_t count) {
+  RWResult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(read(fd_, buffer, convert_rwcount(count))));
+  if (result < 0)
+    FMT_THROW(SystemError(errno, "cannot read from file"));
+  return internal::to_unsigned(result);
+}
+
+std::size_t fmt::File::write(const void *buffer, std::size_t count) {
+  RWResult result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count))));
+  if (result < 0)
+    FMT_THROW(SystemError(errno, "cannot write to file"));
+  return internal::to_unsigned(result);
+}
+
+fmt::File fmt::File::dup(int fd) {
+  // Don't retry as dup doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009695399/functions/dup.html
+  int new_fd = FMT_POSIX_CALL(dup(fd));
+  if (new_fd == -1)
+    FMT_THROW(SystemError(errno, "cannot duplicate file descriptor {}", fd));
+  return File(new_fd);
+}
+
+void fmt::File::dup2(int fd) {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1) {
+    FMT_THROW(SystemError(errno,
+      "cannot duplicate file descriptor {} to {}", fd_, fd));
+  }
+}
+
+void fmt::File::dup2(int fd, ErrorCode &ec) FMT_NOEXCEPT {
+  int result = 0;
+  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
+  if (result == -1)
+    ec = ErrorCode(errno);
+}
+
+void fmt::File::pipe(File &read_end, File &write_end) {
+  // Close the descriptors first to make sure that assignments don't throw
+  // and there are no leaks.
+  read_end.close();
+  write_end.close();
+  int fds[2] = {};
+#ifdef _WIN32
+  // Make the default pipe capacity same as on Linux 2.6.11+.
+  enum { DEFAULT_CAPACITY = 65536 };
+  int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY));
+#else
+  // Don't retry as the pipe function doesn't return EINTR.
+  // http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html
+  int result = FMT_POSIX_CALL(pipe(fds));
+#endif
+  if (result != 0)
+    FMT_THROW(SystemError(errno, "cannot create pipe"));
+  // The following assignments don't throw because read_fd and write_fd
+  // are closed.
+  read_end = File(fds[0]);
+  write_end = File(fds[1]);
+}
+
+fmt::BufferedFile fmt::File::fdopen(const char *mode) {
+  // Don't retry as fdopen doesn't return EINTR.
+  FILE *f = FMT_POSIX_CALL(fdopen(fd_, mode));
+  if (!f)
+    FMT_THROW(SystemError(errno, "cannot associate stream with file descriptor"));
+  BufferedFile file(f);
+  fd_ = -1;
+  return file;
+}
+
+long fmt::getpagesize() {
+#ifdef _WIN32
+  SYSTEM_INFO si;
+  GetSystemInfo(&si);
+  return si.dwPageSize;
+#else
+  long size = FMT_POSIX_CALL(sysconf(_SC_PAGESIZE));
+  if (size < 0)
+    FMT_THROW(SystemError(errno, "cannot get memory page size"));
+  return size;
+#endif
+}
diff --git a/3party/fmt/fmt/posix.h b/3party/fmt/fmt/posix.h
new file mode 100644
index 0000000..f829799
--- /dev/null
+++ b/3party/fmt/fmt/posix.h
@@ -0,0 +1,371 @@
+/*
+ A C++ interface to POSIX functions.
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#ifndef FMT_POSIX_H_
+#define FMT_POSIX_H_
+
+#if defined(__MINGW32__) || defined(__CYGWIN__)
+// Workaround MinGW bug https://sourceforge.net/p/mingw/bugs/2024/.
+# undef __STRICT_ANSI__
+#endif
+
+#include <errno.h>
+#include <fcntl.h>   // for O_RDONLY
+#include <locale.h>  // for locale_t
+#include <stdio.h>
+#include <stdlib.h>  // for strtod_l
+
+#include <cstddef>
+
+#if defined __APPLE__ || defined(__FreeBSD__)
+# include <xlocale.h>  // for LC_NUMERIC_MASK on OS X
+#endif
+
+#include "format.h"
+
+#ifndef FMT_POSIX
+# if defined(_WIN32) && !defined(__MINGW32__)
+// Fix warnings about deprecated symbols.
+#  define FMT_POSIX(call) _##call
+# else
+#  define FMT_POSIX(call) call
+# endif
+#endif
+
+// Calls to system functions are wrapped in FMT_SYSTEM for testability.
+#ifdef FMT_SYSTEM
+# define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
+#else
+# define FMT_SYSTEM(call) call
+# ifdef _WIN32
+// Fix warnings about deprecated symbols.
+#  define FMT_POSIX_CALL(call) ::_##call
+# else
+#  define FMT_POSIX_CALL(call) ::call
+# endif
+#endif
+
+// Retries the expression while it evaluates to error_result and errno
+// equals to EINTR.
+#ifndef _WIN32
+# define FMT_RETRY_VAL(result, expression, error_result) \
+  do { \
+    result = (expression); \
+  } while (result == error_result && errno == EINTR)
+#else
+# define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
+#endif
+
+#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
+
+namespace fmt {
+
+// An error code.
+class ErrorCode {
+ private:
+  int value_;
+
+ public:
+  explicit ErrorCode(int value = 0) FMT_NOEXCEPT : value_(value) {}
+
+  int get() const FMT_NOEXCEPT { return value_; }
+};
+
+// A buffered file.
+class BufferedFile {
+ private:
+  FILE *file_;
+
+  friend class File;
+
+  explicit BufferedFile(FILE *f) : file_(f) {}
+
+ public:
+  // Constructs a BufferedFile object which doesn't represent any file.
+  BufferedFile() FMT_NOEXCEPT : file_(FMT_NULL) {}
+
+  // Destroys the object closing the file it represents if any.
+  FMT_API ~BufferedFile() FMT_NOEXCEPT;
+
+#if !FMT_USE_RVALUE_REFERENCES
+  // Emulate a move constructor and a move assignment operator if rvalue
+  // references are not supported.
+
+ private:
+  // A proxy object to emulate a move constructor.
+  // It is private to make it impossible call operator Proxy directly.
+  struct Proxy {
+    FILE *file;
+  };
+
+public:
+  // A "move constructor" for moving from a temporary.
+  BufferedFile(Proxy p) FMT_NOEXCEPT : file_(p.file) {}
+
+  // A "move constructor" for moving from an lvalue.
+  BufferedFile(BufferedFile &f) FMT_NOEXCEPT : file_(f.file_) {
+    f.file_ = FMT_NULL;
+  }
+
+  // A "move assignment operator" for moving from a temporary.
+  BufferedFile &operator=(Proxy p) {
+    close();
+    file_ = p.file;
+    return *this;
+  }
+
+  // A "move assignment operator" for moving from an lvalue.
+  BufferedFile &operator=(BufferedFile &other) {
+    close();
+    file_ = other.file_;
+    other.file_ = FMT_NULL;
+    return *this;
+  }
+
+  // Returns a proxy object for moving from a temporary:
+  //   BufferedFile file = BufferedFile(...);
+  operator Proxy() FMT_NOEXCEPT {
+    Proxy p = {file_};
+    file_ = FMT_NULL;
+    return p;
+  }
+
+#else
+ private:
+  FMT_DISALLOW_COPY_AND_ASSIGN(BufferedFile);
+
+ public:
+  BufferedFile(BufferedFile &&other) FMT_NOEXCEPT : file_(other.file_) {
+    other.file_ = FMT_NULL;
+  }
+
+  BufferedFile& operator=(BufferedFile &&other) {
+    close();
+    file_ = other.file_;
+    other.file_ = FMT_NULL;
+    return *this;
+  }
+#endif
+
+  // Opens a file.
+  FMT_API BufferedFile(CStringRef filename, CStringRef mode);
+
+  // Closes the file.
+  FMT_API void close();
+
+  // Returns the pointer to a FILE object representing this file.
+  FILE *get() const FMT_NOEXCEPT { return file_; }
+
+  // We place parentheses around fileno to workaround a bug in some versions
+  // of MinGW that define fileno as a macro.
+  FMT_API int (fileno)() const;
+
+  void print(CStringRef format_str, const ArgList &args) {
+    fmt::print(file_, format_str, args);
+  }
+  FMT_VARIADIC(void, print, CStringRef)
+};
+
+// A file. Closed file is represented by a File object with descriptor -1.
+// Methods that are not declared with FMT_NOEXCEPT may throw
+// fmt::SystemError in case of failure. Note that some errors such as
+// closing the file multiple times will cause a crash on Windows rather
+// than an exception. You can get standard behavior by overriding the
+// invalid parameter handler with _set_invalid_parameter_handler.
+class File {
+ private:
+  int fd_;  // File descriptor.
+
+  // Constructs a File object with a given descriptor.
+  explicit File(int fd) : fd_(fd) {}
+
+ public:
+  // Possible values for the oflag argument to the constructor.
+  enum {
+    RDONLY = FMT_POSIX(O_RDONLY), // Open for reading only.
+    WRONLY = FMT_POSIX(O_WRONLY), // Open for writing only.
+    RDWR   = FMT_POSIX(O_RDWR)    // Open for reading and writing.
+  };
+
+  // Constructs a File object which doesn't represent any file.
+  File() FMT_NOEXCEPT : fd_(-1) {}
+
+  // Opens a file and constructs a File object representing this file.
+  FMT_API File(CStringRef path, int oflag);
+
+#if !FMT_USE_RVALUE_REFERENCES
+  // Emulate a move constructor and a move assignment operator if rvalue
+  // references are not supported.
+
+ private:
+  // A proxy object to emulate a move constructor.
+  // It is private to make it impossible call operator Proxy directly.
+  struct Proxy {
+    int fd;
+  };
+
+ public:
+  // A "move constructor" for moving from a temporary.
+  File(Proxy p) FMT_NOEXCEPT : fd_(p.fd) {}
+
+  // A "move constructor" for moving from an lvalue.
+  File(File &other) FMT_NOEXCEPT : fd_(other.fd_) {
+    other.fd_ = -1;
+  }
+
+  // A "move assignment operator" for moving from a temporary.
+  File &operator=(Proxy p) {
+    close();
+    fd_ = p.fd;
+    return *this;
+  }
+
+  // A "move assignment operator" for moving from an lvalue.
+  File &operator=(File &other) {
+    close();
+    fd_ = other.fd_;
+    other.fd_ = -1;
+    return *this;
+  }
+
+  // Returns a proxy object for moving from a temporary:
+  //   File file = File(...);
+  operator Proxy() FMT_NOEXCEPT {
+    Proxy p = {fd_};
+    fd_ = -1;
+    return p;
+  }
+
+#else
+ private:
+  FMT_DISALLOW_COPY_AND_ASSIGN(File);
+
+ public:
+  File(File &&other) FMT_NOEXCEPT : fd_(other.fd_) {
+    other.fd_ = -1;
+  }
+
+  File& operator=(File &&other) {
+    close();
+    fd_ = other.fd_;
+    other.fd_ = -1;
+    return *this;
+  }
+#endif
+
+  // Destroys the object closing the file it represents if any.
+  FMT_API ~File() FMT_NOEXCEPT;
+
+  // Returns the file descriptor.
+  int descriptor() const FMT_NOEXCEPT { return fd_; }
+
+  // Closes the file.
+  FMT_API void close();
+
+  // Returns the file size. The size has signed type for consistency with
+  // stat::st_size.
+  FMT_API LongLong size() const;
+
+  // Attempts to read count bytes from the file into the specified buffer.
+  FMT_API std::size_t read(void *buffer, std::size_t count);
+
+  // Attempts to write count bytes from the specified buffer to the file.
+  FMT_API std::size_t write(const void *buffer, std::size_t count);
+
+  // Duplicates a file descriptor with the dup function and returns
+  // the duplicate as a file object.
+  FMT_API static File dup(int fd);
+
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  FMT_API void dup2(int fd);
+
+  // Makes fd be the copy of this file descriptor, closing fd first if
+  // necessary.
+  FMT_API void dup2(int fd, ErrorCode &ec) FMT_NOEXCEPT;
+
+  // Creates a pipe setting up read_end and write_end file objects for reading
+  // and writing respectively.
+  FMT_API static void pipe(File &read_end, File &write_end);
+
+  // Creates a BufferedFile object associated with this file and detaches
+  // this File object from the file.
+  FMT_API BufferedFile fdopen(const char *mode);
+};
+
+// Returns the memory page size.
+long getpagesize();
+
+#if (defined(LC_NUMERIC_MASK) || defined(_MSC_VER)) && \
+    !defined(__ANDROID__) && !defined(__CYGWIN__)
+# define FMT_LOCALE
+#endif
+
+#ifdef FMT_LOCALE
+// A "C" numeric locale.
+class Locale {
+ private:
+# ifdef _MSC_VER
+  typedef _locale_t locale_t;
+
+  enum { LC_NUMERIC_MASK = LC_NUMERIC };
+
+  static locale_t newlocale(int category_mask, const char *locale, locale_t) {
+    return _create_locale(category_mask, locale);
+  }
+
+  static void freelocale(locale_t locale) {
+    _free_locale(locale);
+  }
+
+  static double strtod_l(const char *nptr, char **endptr, _locale_t locale) {
+    return _strtod_l(nptr, endptr, locale);
+  }
+# elif !defined(HAVE_STRTOD_L)
+     static double strtod_l(const char *nptr, char **endptr, locale_t) {
+        return atof(nptr);
+     }
+# endif
+
+  locale_t locale_;
+
+  FMT_DISALLOW_COPY_AND_ASSIGN(Locale);
+
+ public:
+  typedef locale_t Type;
+
+  Locale() : locale_(newlocale(LC_NUMERIC_MASK, "C", FMT_NULL)) {
+    if (!locale_)
+      FMT_THROW(fmt::SystemError(errno, "cannot create locale"));
+  }
+  ~Locale() { freelocale(locale_); }
+
+  Type get() const { return locale_; }
+
+  // Converts string to floating-point number and advances str past the end
+  // of the parsed input.
+  double strtod(const char *&str) const {
+    char *end = FMT_NULL;
+    double result = strtod_l(str, &end, locale_);
+    str = end;
+    return result;
+  }
+};
+#endif  // FMT_LOCALE
+}  // namespace fmt
+
+#if !FMT_USE_RVALUE_REFERENCES
+namespace std {
+// For compatibility with C++98.
+inline fmt::BufferedFile &move(fmt::BufferedFile &f) { return f; }
+inline fmt::File &move(fmt::File &f) { return f; }
+}
+#endif
+
+#endif  // FMT_POSIX_H_
diff --git a/3party/fmt/fmt/printf.cc b/3party/fmt/fmt/printf.cc
new file mode 100644
index 0000000..95d7a36
--- /dev/null
+++ b/3party/fmt/fmt/printf.cc
@@ -0,0 +1,32 @@
+/*
+ Formatting library for C++
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#include "format.h"
+#include "printf.h"
+
+namespace fmt {
+
+template <typename Char>
+void printf(BasicWriter<Char> &w, BasicCStringRef<Char> format, ArgList args);
+
+FMT_FUNC int fprintf(std::FILE *f, CStringRef format, ArgList args) {
+  MemoryWriter w;
+  printf(w, format, args);
+  std::size_t size = w.size();
+  return std::fwrite(w.data(), 1, size, f) < size ? -1 : static_cast<int>(size);
+}
+
+#ifndef FMT_HEADER_ONLY
+
+template void PrintfFormatter<char>::format(CStringRef format);
+template void PrintfFormatter<wchar_t>::format(WCStringRef format);
+
+#endif  // FMT_HEADER_ONLY
+
+}  // namespace fmt
diff --git a/3party/fmt/fmt/printf.h b/3party/fmt/fmt/printf.h
new file mode 100644
index 0000000..46205a7
--- /dev/null
+++ b/3party/fmt/fmt/printf.h
@@ -0,0 +1,603 @@
+/*
+ Formatting library for C++
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#ifndef FMT_PRINTF_H_
+#define FMT_PRINTF_H_
+
+#include <algorithm>  // std::fill_n
+#include <limits>     // std::numeric_limits
+
+#include "ostream.h"
+
+namespace fmt {
+namespace internal {
+
+// Checks if a value fits in int - used to avoid warnings about comparing
+// signed and unsigned integers.
+template <bool IsSigned>
+struct IntChecker {
+  template <typename T>
+  static bool fits_in_int(T value) {
+    unsigned max = std::numeric_limits<int>::max();
+    return value <= max;
+  }
+  static bool fits_in_int(bool) { return true; }
+};
+
+template <>
+struct IntChecker<true> {
+  template <typename T>
+  static bool fits_in_int(T value) {
+    return value >= std::numeric_limits<int>::min() &&
+           value <= std::numeric_limits<int>::max();
+  }
+  static bool fits_in_int(int) { return true; }
+};
+
+class PrecisionHandler : public ArgVisitor<PrecisionHandler, int> {
+ public:
+  void report_unhandled_arg() {
+    FMT_THROW(FormatError("precision is not integer"));
+  }
+
+  template <typename T>
+  int visit_any_int(T value) {
+    if (!IntChecker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
+      FMT_THROW(FormatError("number is too big"));
+    return static_cast<int>(value);
+  }
+};
+
+// IsZeroInt::visit(arg) returns true iff arg is a zero integer.
+class IsZeroInt : public ArgVisitor<IsZeroInt, bool> {
+ public:
+  template <typename T>
+  bool visit_any_int(T value) { return value == 0; }
+};
+
+// returns the default type for format specific "%s"
+class DefaultType : public ArgVisitor<DefaultType, char> {
+ public:
+  char visit_char(int) { return 'c'; }
+
+  char visit_bool(bool) { return 's'; }
+
+  char visit_pointer(const void *) { return 'p'; }
+
+  template <typename T>
+  char visit_any_int(T) { return 'd'; }
+
+  template <typename T>
+  char visit_any_double(T) { return 'g'; }
+
+  char visit_unhandled_arg() { return 's'; }
+};
+
+template <typename T, typename U>
+struct is_same {
+  enum { value = 0 };
+};
+
+template <typename T>
+struct is_same<T, T> {
+  enum { value = 1 };
+};
+
+// An argument visitor that converts an integer argument to T for printf,
+// if T is an integral type. If T is void, the argument is converted to
+// corresponding signed or unsigned type depending on the type specifier:
+// 'd' and 'i' - signed, other - unsigned)
+template <typename T = void>
+class ArgConverter : public ArgVisitor<ArgConverter<T>, void> {
+ private:
+  internal::Arg &arg_;
+  wchar_t type_;
+
+  FMT_DISALLOW_COPY_AND_ASSIGN(ArgConverter);
+
+ public:
+  ArgConverter(internal::Arg &arg, wchar_t type)
+    : arg_(arg), type_(type) {}
+
+  void visit_bool(bool value) {
+    if (type_ != 's')
+      visit_any_int(value);
+  }
+
+  void visit_char(int value) {
+    if (type_ != 's')
+      visit_any_int(value);
+  }
+
+  template <typename U>
+  void visit_any_int(U value) {
+    bool is_signed = type_ == 'd' || type_ == 'i';
+    if (type_ == 's') {
+      is_signed = std::numeric_limits<U>::is_signed;
+    }
+
+    using internal::Arg;
+    typedef typename internal::Conditional<
+        is_same<T, void>::value, U, T>::type TargetType;
+    if (const_check(sizeof(TargetType) <= sizeof(int))) {
+      // Extra casts are used to silence warnings.
+      if (is_signed) {
+        arg_.type = Arg::INT;
+        arg_.int_value = static_cast<int>(static_cast<TargetType>(value));
+      } else {
+        arg_.type = Arg::UINT;
+        typedef typename internal::MakeUnsigned<TargetType>::Type Unsigned;
+        arg_.uint_value = static_cast<unsigned>(static_cast<Unsigned>(value));
+      }
+    } else {
+      if (is_signed) {
+        arg_.type = Arg::LONG_LONG;
+        // glibc's printf doesn't sign extend arguments of smaller types:
+        //   std::printf("%lld", -42);  // prints "4294967254"
+        // but we don't have to do the same because it's a UB.
+        arg_.long_long_value = static_cast<LongLong>(value);
+      } else {
+        arg_.type = Arg::ULONG_LONG;
+        arg_.ulong_long_value =
+            static_cast<typename internal::MakeUnsigned<U>::Type>(value);
+      }
+    }
+  }
+};
+
+// Converts an integer argument to char for printf.
+class CharConverter : public ArgVisitor<CharConverter, void> {
+ private:
+  internal::Arg &arg_;
+
+  FMT_DISALLOW_COPY_AND_ASSIGN(CharConverter);
+
+ public:
+  explicit CharConverter(internal::Arg &arg) : arg_(arg) {}
+
+  template <typename T>
+  void visit_any_int(T value) {
+    arg_.type = internal::Arg::CHAR;
+    arg_.int_value = static_cast<char>(value);
+  }
+};
+
+// Checks if an argument is a valid printf width specifier and sets
+// left alignment if it is negative.
+class WidthHandler : public ArgVisitor<WidthHandler, unsigned> {
+ private:
+  FormatSpec &spec_;
+
+  FMT_DISALLOW_COPY_AND_ASSIGN(WidthHandler);
+
+ public:
+  explicit WidthHandler(FormatSpec &spec) : spec_(spec) {}
+
+  void report_unhandled_arg() {
+    FMT_THROW(FormatError("width is not integer"));
+  }
+
+  template <typename T>
+  unsigned visit_any_int(T value) {
+    typedef typename internal::IntTraits<T>::MainType UnsignedType;
+    UnsignedType width = static_cast<UnsignedType>(value);
+    if (internal::is_negative(value)) {
+      spec_.align_ = ALIGN_LEFT;
+      width = 0 - width;
+    }
+    unsigned int_max = std::numeric_limits<int>::max();
+    if (width > int_max)
+      FMT_THROW(FormatError("number is too big"));
+    return static_cast<unsigned>(width);
+  }
+};
+}  // namespace internal
+
+/**
+  \rst
+  A ``printf`` argument formatter based on the `curiously recurring template
+  pattern <http://en.wikipedia.org/wiki/Curiously_recurring_template_pattern>`_.
+
+  To use `~fmt::BasicPrintfArgFormatter` define a subclass that implements some
+  or all of the visit methods with the same signatures as the methods in
+  `~fmt::ArgVisitor`, for example, `~fmt::ArgVisitor::visit_int()`.
+  Pass the subclass as the *Impl* template parameter. When a formatting
+  function processes an argument, it will dispatch to a visit method
+  specific to the argument type. For example, if the argument type is
+  ``double`` then the `~fmt::ArgVisitor::visit_double()` method of a subclass
+  will be called. If the subclass doesn't contain a method with this signature,
+  then a corresponding method of `~fmt::BasicPrintfArgFormatter` or its
+  superclass will be called.
+  \endrst
+ */
+template <typename Impl, typename Char, typename Spec>
+class BasicPrintfArgFormatter :
+    public internal::ArgFormatterBase<Impl, Char, Spec> {
+ private:
+  void write_null_pointer() {
+    this->spec().type_ = 0;
+    this->write("(nil)");
+  }
+
+  typedef internal::ArgFormatterBase<Impl, Char, Spec> Base;
+
+ public:
+  /**
+    \rst
+    Constructs an argument formatter object.
+    *writer* is a reference to the output writer and *spec* contains format
+    specifier information for standard argument types.
+    \endrst
+   */
+  BasicPrintfArgFormatter(BasicWriter<Char> &w, Spec &s)
+  : internal::ArgFormatterBase<Impl, Char, Spec>(w, s) {}
+
+  /** Formats an argument of type ``bool``. */
+  void visit_bool(bool value) {
+    Spec &fmt_spec = this->spec();
+    if (fmt_spec.type_ != 's')
+      return this->visit_any_int(value);
+    fmt_spec.type_ = 0;
+    this->write(value);
+  }
+
+  /** Formats a character. */
+  void visit_char(int value) {
+    const Spec &fmt_spec = this->spec();
+    BasicWriter<Char> &w = this->writer();
+    if (fmt_spec.type_ && fmt_spec.type_ != 'c')
+      w.write_int(value, fmt_spec);
+    typedef typename BasicWriter<Char>::CharPtr CharPtr;
+    CharPtr out = CharPtr();
+    if (fmt_spec.width_ > 1) {
+      Char fill = ' ';
+      out = w.grow_buffer(fmt_spec.width_);
+      if (fmt_spec.align_ != ALIGN_LEFT) {
+        std::fill_n(out, fmt_spec.width_ - 1, fill);
+        out += fmt_spec.width_ - 1;
+      } else {
+        std::fill_n(out + 1, fmt_spec.width_ - 1, fill);
+      }
+    } else {
+      out = w.grow_buffer(1);
+    }
+    *out = static_cast<Char>(value);
+  }
+
+  /** Formats a null-terminated C string. */
+  void visit_cstring(const char *value) {
+    if (value)
+      Base::visit_cstring(value);
+    else if (this->spec().type_ == 'p')
+      write_null_pointer();
+    else
+      this->write("(null)");
+  }
+
+  /** Formats a pointer. */
+  void visit_pointer(const void *value) {
+    if (value)
+      return Base::visit_pointer(value);
+    this->spec().type_ = 0;
+    write_null_pointer();
+  }
+
+  /** Formats an argument of a custom (user-defined) type. */
+  void visit_custom(internal::Arg::CustomValue c) {
+    BasicFormatter<Char> formatter(ArgList(), this->writer());
+    const Char format_str[] = {'}', 0};
+    const Char *format = format_str;
+    c.format(&formatter, c.value, &format);
+  }
+};
+
+/** The default printf argument formatter. */
+template <typename Char>
+class PrintfArgFormatter :
+    public BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char, FormatSpec> {
+ public:
+  /** Constructs an argument formatter object. */
+  PrintfArgFormatter(BasicWriter<Char> &w, FormatSpec &s)
+  : BasicPrintfArgFormatter<PrintfArgFormatter<Char>, Char, FormatSpec>(w, s) {}
+};
+
+/** This template formats data and writes the output to a writer. */
+template <typename Char, typename ArgFormatter = PrintfArgFormatter<Char> >
+class PrintfFormatter : private internal::FormatterBase {
+ private:
+  BasicWriter<Char> &writer_;
+
+  void parse_flags(FormatSpec &spec, const Char *&s);
+
+  // Returns the argument with specified index or, if arg_index is equal
+  // to the maximum unsigned value, the next argument.
+  internal::Arg get_arg(
+      const Char *s,
+      unsigned arg_index = (std::numeric_limits<unsigned>::max)());
+
+  // Parses argument index, flags and width and returns the argument index.
+  unsigned parse_header(const Char *&s, FormatSpec &spec);
+
+ public:
+  /**
+   \rst
+   Constructs a ``PrintfFormatter`` object. References to the arguments and
+   the writer are stored in the formatter object so make sure they have
+   appropriate lifetimes.
+   \endrst
+   */
+  explicit PrintfFormatter(const ArgList &al, BasicWriter<Char> &w)
+    : FormatterBase(al), writer_(w) {}
+
+  /** Formats stored arguments and writes the output to the writer. */
+  void format(BasicCStringRef<Char> format_str);
+};
+
+template <typename Char, typename AF>
+void PrintfFormatter<Char, AF>::parse_flags(FormatSpec &spec, const Char *&s) {
+  for (;;) {
+    switch (*s++) {
+      case '-':
+        spec.align_ = ALIGN_LEFT;
+        break;
+      case '+':
+        spec.flags_ |= SIGN_FLAG | PLUS_FLAG;
+        break;
+      case '0':
+        spec.fill_ = '0';
+        break;
+      case ' ':
+        spec.flags_ |= SIGN_FLAG;
+        break;
+      case '#':
+        spec.flags_ |= HASH_FLAG;
+        break;
+      default:
+        --s;
+        return;
+    }
+  }
+}
+
+template <typename Char, typename AF>
+internal::Arg PrintfFormatter<Char, AF>::get_arg(const Char *s,
+                                                 unsigned arg_index) {
+  (void)s;
+  const char *error = FMT_NULL;
+  internal::Arg arg = arg_index == std::numeric_limits<unsigned>::max() ?
+    next_arg(error) : FormatterBase::get_arg(arg_index - 1, error);
+  if (error)
+    FMT_THROW(FormatError(!*s ? "invalid format string" : error));
+  return arg;
+}
+
+template <typename Char, typename AF>
+unsigned PrintfFormatter<Char, AF>::parse_header(
+  const Char *&s, FormatSpec &spec) {
+  unsigned arg_index = std::numeric_limits<unsigned>::max();
+  Char c = *s;
+  if (c >= '0' && c <= '9') {
+    // Parse an argument index (if followed by '$') or a width possibly
+    // preceded with '0' flag(s).
+    unsigned value = internal::parse_nonnegative_int(s);
+    if (*s == '$') {  // value is an argument index
+      ++s;
+      arg_index = value;
+    } else {
+      if (c == '0')
+        spec.fill_ = '0';
+      if (value != 0) {
+        // Nonzero value means that we parsed width and don't need to
+        // parse it or flags again, so return now.
+        spec.width_ = value;
+        return arg_index;
+      }
+    }
+  }
+  parse_flags(spec, s);
+  // Parse width.
+  if (*s >= '0' && *s <= '9') {
+    spec.width_ = internal::parse_nonnegative_int(s);
+  } else if (*s == '*') {
+    ++s;
+    spec.width_ = internal::WidthHandler(spec).visit(get_arg(s));
+  }
+  return arg_index;
+}
+
+template <typename Char, typename AF>
+void PrintfFormatter<Char, AF>::format(BasicCStringRef<Char> format_str) {
+  const Char *start = format_str.c_str();
+  const Char *s = start;
+  while (*s) {
+    Char c = *s++;
+    if (c != '%') continue;
+    if (*s == c) {
+      write(writer_, start, s);
+      start = ++s;
+      continue;
+    }
+    write(writer_, start, s - 1);
+
+    FormatSpec spec;
+    spec.align_ = ALIGN_RIGHT;
+
+    // Parse argument index, flags and width.
+    unsigned arg_index = parse_header(s, spec);
+
+    // Parse precision.
+    if (*s == '.') {
+      ++s;
+      if ('0' <= *s && *s <= '9') {
+        spec.precision_ = static_cast<int>(internal::parse_nonnegative_int(s));
+      } else if (*s == '*') {
+        ++s;
+        spec.precision_ = internal::PrecisionHandler().visit(get_arg(s));
+      } else {
+        spec.precision_ = 0;
+      }
+    }
+
+    using internal::Arg;
+    Arg arg = get_arg(s, arg_index);
+    if (spec.flag(HASH_FLAG) && internal::IsZeroInt().visit(arg))
+      spec.flags_ &= ~internal::to_unsigned<int>(HASH_FLAG);
+    if (spec.fill_ == '0') {
+      if (arg.type <= Arg::LAST_NUMERIC_TYPE)
+        spec.align_ = ALIGN_NUMERIC;
+      else
+        spec.fill_ = ' ';  // Ignore '0' flag for non-numeric types.
+    }
+
+    // Parse length and convert the argument to the required type.
+    using internal::ArgConverter;
+    switch (*s++) {
+    case 'h':
+      if (*s == 'h')
+        ArgConverter<signed char>(arg, *++s).visit(arg);
+      else
+        ArgConverter<short>(arg, *s).visit(arg);
+      break;
+    case 'l':
+      if (*s == 'l')
+        ArgConverter<fmt::LongLong>(arg, *++s).visit(arg);
+      else
+        ArgConverter<long>(arg, *s).visit(arg);
+      break;
+    case 'j':
+      ArgConverter<intmax_t>(arg, *s).visit(arg);
+      break;
+    case 'z':
+      ArgConverter<std::size_t>(arg, *s).visit(arg);
+      break;
+    case 't':
+      ArgConverter<std::ptrdiff_t>(arg, *s).visit(arg);
+      break;
+    case 'L':
+      // printf produces garbage when 'L' is omitted for long double, no
+      // need to do the same.
+      break;
+    default:
+      --s;
+      ArgConverter<void>(arg, *s).visit(arg);
+    }
+
+    // Parse type.
+    if (!*s)
+      FMT_THROW(FormatError("invalid format string"));
+    spec.type_ = static_cast<char>(*s++);
+
+    if (spec.type_ == 's') {
+      // set the format type to the default if 's' is specified
+      spec.type_ = internal::DefaultType().visit(arg);
+    }
+
+    if (arg.type <= Arg::LAST_INTEGER_TYPE) {
+      // Normalize type.
+      switch (spec.type_) {
+      case 'i': case 'u':
+        spec.type_ = 'd';
+        break;
+      case 'c':
+        // TODO: handle wchar_t
+        internal::CharConverter(arg).visit(arg);
+        break;
+      }
+    }
+
+    start = s;
+
+    // Format argument.
+    AF(writer_, spec).visit(arg);
+  }
+  write(writer_, start, s);
+}
+
+inline void printf(Writer &w, CStringRef format, ArgList args) {
+  PrintfFormatter<char>(args, w).format(format);
+}
+FMT_VARIADIC(void, printf, Writer &, CStringRef)
+
+inline void printf(WWriter &w, WCStringRef format, ArgList args) {
+  PrintfFormatter<wchar_t>(args, w).format(format);
+}
+FMT_VARIADIC(void, printf, WWriter &, WCStringRef)
+
+/**
+  \rst
+  Formats arguments and returns the result as a string.
+
+  **Example**::
+
+    std::string message = fmt::sprintf("The answer is %d", 42);
+  \endrst
+*/
+inline std::string sprintf(CStringRef format, ArgList args) {
+  MemoryWriter w;
+  printf(w, format, args);
+  return w.str();
+}
+FMT_VARIADIC(std::string, sprintf, CStringRef)
+
+inline std::wstring sprintf(WCStringRef format, ArgList args) {
+  WMemoryWriter w;
+  printf(w, format, args);
+  return w.str();
+}
+FMT_VARIADIC_W(std::wstring, sprintf, WCStringRef)
+
+/**
+  \rst
+  Prints formatted data to the file *f*.
+
+  **Example**::
+
+    fmt::fprintf(stderr, "Don't %s!", "panic");
+  \endrst
+ */
+FMT_API int fprintf(std::FILE *f, CStringRef format, ArgList args);
+FMT_VARIADIC(int, fprintf, std::FILE *, CStringRef)
+
+/**
+  \rst
+  Prints formatted data to ``stdout``.
+
+  **Example**::
+
+    fmt::printf("Elapsed time: %.2f seconds", 1.23);
+  \endrst
+ */
+inline int printf(CStringRef format, ArgList args) {
+  return fprintf(stdout, format, args);
+}
+FMT_VARIADIC(int, printf, CStringRef)
+
+/**
+  \rst
+  Prints formatted data to the stream *os*.
+
+  **Example**::
+
+    fprintf(cerr, "Don't %s!", "panic");
+  \endrst
+ */
+inline int fprintf(std::ostream &os, CStringRef format_str, ArgList args) {
+  MemoryWriter w;
+  printf(w, format_str, args);
+  internal::write(os, w);
+  return static_cast<int>(w.size());
+}
+FMT_VARIADIC(int, fprintf, std::ostream &, CStringRef)
+}  // namespace fmt
+
+#ifdef FMT_HEADER_ONLY
+# include "printf.cc"
+#endif
+
+#endif  // FMT_PRINTF_H_
diff --git a/3party/fmt/fmt/string.h b/3party/fmt/fmt/string.h
new file mode 100644
index 0000000..05996eb
--- /dev/null
+++ b/3party/fmt/fmt/string.h
@@ -0,0 +1,148 @@
+/*
+ Formatting library for C++ - string utilities
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#ifdef FMT_INCLUDE
+# error "Add the fmt's parent directory and not fmt itself to includes."
+#endif
+
+#ifndef FMT_STRING_H_
+#define FMT_STRING_H_
+
+#include "format.h"
+
+namespace fmt {
+
+namespace internal {
+
+// A buffer that stores data in ``std::basic_string``.
+template <typename Char, typename Allocator = std::allocator<Char> >
+class StringBuffer : public Buffer<Char> {
+ public:
+  typedef std::basic_string<Char, std::char_traits<Char>, Allocator> StringType;
+
+ private:
+  StringType data_;
+
+ protected:
+  virtual void grow(std::size_t size) FMT_OVERRIDE {
+    data_.resize(size);
+    this->ptr_ = &data_[0];
+    this->capacity_ = size;
+  }
+
+ public:
+  explicit StringBuffer(const Allocator &allocator = Allocator())
+  : data_(allocator) {}
+
+  // Moves the data to ``str`` clearing the buffer.
+  void move_to(StringType &str) {
+    data_.resize(this->size_);
+    str.swap(data_);
+    this->capacity_ = this->size_ = 0;
+    this->ptr_ = FMT_NULL;
+  }
+};
+}  // namespace internal
+
+/**
+  \rst
+  This class template provides operations for formatting and writing data
+  into a character stream. The output is stored in a ``std::basic_string``
+  that grows dynamically.
+
+  You can use one of the following typedefs for common character types
+  and the standard allocator:
+
+  +---------------+----------------------------+
+  | Type          | Definition                 |
+  +===============+============================+
+  | StringWriter  | BasicStringWriter<char>    |
+  +---------------+----------------------------+
+  | WStringWriter | BasicStringWriter<wchar_t> |
+  +---------------+----------------------------+
+
+  **Example**::
+
+     StringWriter out;
+     out << "The answer is " << 42 << "\n";
+
+  This will write the following output to the ``out`` object:
+
+  .. code-block:: none
+
+     The answer is 42
+
+  The output can be moved to a ``std::basic_string`` with ``out.move_to()``.
+  \endrst
+ */
+template <typename Char, typename Allocator = std::allocator<Char> >
+class BasicStringWriter : public BasicWriter<Char> {
+ private:
+  internal::StringBuffer<Char, Allocator> buffer_;
+
+ public:
+  /**
+    \rst
+    Constructs a :class:`fmt::BasicStringWriter` object.
+    \endrst
+   */
+  explicit BasicStringWriter(const Allocator &allocator = Allocator())
+  : BasicWriter<Char>(buffer_), buffer_(allocator) {}
+
+  /**
+    \rst
+    Moves the buffer content to *str* clearing the buffer.
+    \endrst
+   */
+  void move_to(std::basic_string<Char, std::char_traits<Char>, Allocator> &str) {
+    buffer_.move_to(str);
+  }
+};
+
+typedef BasicStringWriter<char> StringWriter;
+typedef BasicStringWriter<wchar_t> WStringWriter;
+
+/**
+  \rst
+  Converts *value* to ``std::string`` using the default format for type *T*.
+
+  **Example**::
+
+    #include "fmt/string.h"
+
+    std::string answer = fmt::to_string(42);
+  \endrst
+ */
+template <typename T>
+std::string to_string(const T &value) {
+  fmt::MemoryWriter w;
+  w << value;
+  return w.str();
+}
+
+/**
+  \rst
+  Converts *value* to ``std::wstring`` using the default format for type *T*.
+
+  **Example**::
+
+    #include "fmt/string.h"
+
+    std::wstring answer = fmt::to_wstring(42);
+  \endrst
+ */
+template <typename T>
+std::wstring to_wstring(const T &value) {
+  fmt::WMemoryWriter w;
+  w << value;
+  return w.str();
+}
+}
+
+#endif  // FMT_STRING_H_
diff --git a/3party/fmt/fmt/time.h b/3party/fmt/fmt/time.h
new file mode 100644
index 0000000..c98b0e0
--- /dev/null
+++ b/3party/fmt/fmt/time.h
@@ -0,0 +1,143 @@
+/*
+ Formatting library for C++ - time formatting
+
+ Copyright (c) 2012 - 2016, Victor Zverovich
+ All rights reserved.
+
+ For the license information refer to format.h.
+ */
+
+#ifndef FMT_TIME_H_
+#define FMT_TIME_H_
+
+#include "format.h"
+#include <ctime>
+
+#ifdef _MSC_VER
+# pragma warning(push)
+# pragma warning(disable: 4702)  // unreachable code
+# pragma warning(disable: 4996)  // "deprecated" functions
+#endif
+
+namespace fmt {
+template <typename ArgFormatter>
+void format_arg(BasicFormatter<char, ArgFormatter> &f,
+                const char *&format_str, const std::tm &tm) {
+  if (*format_str == ':')
+    ++format_str;
+  const char *end = format_str;
+  while (*end && *end != '}')
+    ++end;
+  if (*end != '}')
+    FMT_THROW(FormatError("missing '}' in format string"));
+  internal::MemoryBuffer<char, internal::INLINE_BUFFER_SIZE> format;
+  format.append(format_str, end + 1);
+  format[format.size() - 1] = '\0';
+  Buffer<char> &buffer = f.writer().buffer();
+  std::size_t start = buffer.size();
+  for (;;) {
+    std::size_t size = buffer.capacity() - start;
+    std::size_t count = std::strftime(&buffer[start], size, &format[0], &tm);
+    if (count != 0) {
+      buffer.resize(start + count);
+      break;
+    }
+    if (size >= format.size() * 256) {
+      // If the buffer is 256 times larger than the format string, assume
+      // that `strftime` gives an empty result. There doesn't seem to be a
+      // better way to distinguish the two cases:
+      // https://github.com/fmtlib/fmt/issues/367
+      break;
+    }
+    const std::size_t MIN_GROWTH = 10;
+    buffer.reserve(buffer.capacity() + (size > MIN_GROWTH ? size : MIN_GROWTH));
+  }
+  format_str = end + 1;
+}
+
+namespace internal{
+inline Null<> localtime_r(...) { return Null<>(); }
+inline Null<> localtime_s(...) { return Null<>(); }
+inline Null<> gmtime_r(...) { return Null<>(); }
+inline Null<> gmtime_s(...) { return Null<>(); }
+}
+
+// Thread-safe replacement for std::localtime
+inline std::tm localtime(std::time_t time) {
+  struct LocalTime {
+    std::time_t time_;
+    std::tm tm_;
+
+    LocalTime(std::time_t t): time_(t) {}
+
+    bool run() {
+      using namespace fmt::internal;
+      return handle(localtime_r(&time_, &tm_));
+    }
+
+    bool handle(std::tm *tm) { return tm != FMT_NULL; }
+
+    bool handle(internal::Null<>) {
+      using namespace fmt::internal;
+      return fallback(localtime_s(&tm_, &time_));
+    }
+
+    bool fallback(int res) { return res == 0; }
+
+    bool fallback(internal::Null<>) {
+      using namespace fmt::internal;
+      std::tm *tm = std::localtime(&time_);
+      if (tm) tm_ = *tm;
+      return tm != FMT_NULL;
+    }
+  };
+  LocalTime lt(time);
+  if (lt.run())
+    return lt.tm_;
+  // Too big time values may be unsupported.
+  FMT_THROW(fmt::FormatError("time_t value out of range"));
+  return std::tm();
+}
+
+// Thread-safe replacement for std::gmtime
+inline std::tm gmtime(std::time_t time) {
+  struct GMTime {
+    std::time_t time_;
+    std::tm tm_;
+
+    GMTime(std::time_t t): time_(t) {}
+
+    bool run() {
+      using namespace fmt::internal;
+      return handle(gmtime_r(&time_, &tm_));
+    }
+
+    bool handle(std::tm *tm) { return tm != FMT_NULL; }
+
+    bool handle(internal::Null<>) {
+      using namespace fmt::internal;
+      return fallback(gmtime_s(&tm_, &time_));
+    }
+
+    bool fallback(int res) { return res == 0; }
+
+    bool fallback(internal::Null<>) {
+      std::tm *tm = std::gmtime(&time_);
+      if (tm != FMT_NULL) tm_ = *tm;
+      return tm != FMT_NULL;
+    }
+  };
+  GMTime gt(time);
+  if (gt.run())
+    return gt.tm_;
+  // Too big time values may be unsupported.
+  FMT_THROW(fmt::FormatError("time_t value out of range"));
+  return std::tm();
+}
+} //namespace fmt
+
+#ifdef _MSC_VER
+# pragma warning(pop)
+#endif
+
+#endif  // FMT_TIME_H_
diff --git a/3party/fmt/include/fmt/args.h b/3party/fmt/include/fmt/args.h
deleted file mode 100644
index ad1654b..0000000
--- a/3party/fmt/include/fmt/args.h
+++ /dev/null
@@ -1,235 +0,0 @@
-// Formatting library for C++ - dynamic argument lists
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_ARGS_H_
-#define FMT_ARGS_H_
-
-#include <functional>  // std::reference_wrapper
-#include <memory>      // std::unique_ptr
-#include <vector>
-
-#include "core.h"
-
-FMT_BEGIN_NAMESPACE
-
-namespace detail {
-
-template <typename T> struct is_reference_wrapper : std::false_type {};
-template <typename T>
-struct is_reference_wrapper<std::reference_wrapper<T>> : std::true_type {};
-
-template <typename T> auto unwrap(const T& v) -> const T& { return v; }
-template <typename T>
-auto unwrap(const std::reference_wrapper<T>& v) -> const T& {
-  return static_cast<const T&>(v);
-}
-
-class dynamic_arg_list {
-  // Workaround for clang's -Wweak-vtables. Unlike for regular classes, for
-  // templates it doesn't complain about inability to deduce single translation
-  // unit for placing vtable. So storage_node_base is made a fake template.
-  template <typename = void> struct node {
-    virtual ~node() = default;
-    std::unique_ptr<node<>> next;
-  };
-
-  template <typename T> struct typed_node : node<> {
-    T value;
-
-    template <typename Arg>
-    FMT_CONSTEXPR typed_node(const Arg& arg) : value(arg) {}
-
-    template <typename Char>
-    FMT_CONSTEXPR typed_node(const basic_string_view<Char>& arg)
-        : value(arg.data(), arg.size()) {}
-  };
-
-  std::unique_ptr<node<>> head_;
-
- public:
-  template <typename T, typename Arg> auto push(const Arg& arg) -> const T& {
-    auto new_node = std::unique_ptr<typed_node<T>>(new typed_node<T>(arg));
-    auto& value = new_node->value;
-    new_node->next = std::move(head_);
-    head_ = std::move(new_node);
-    return value;
-  }
-};
-}  // namespace detail
-
-/**
-  \rst
-  A dynamic version of `fmt::format_arg_store`.
-  It's equipped with a storage to potentially temporary objects which lifetimes
-  could be shorter than the format arguments object.
-
-  It can be implicitly converted into `~fmt::basic_format_args` for passing
-  into type-erased formatting functions such as `~fmt::vformat`.
-  \endrst
- */
-template <typename Context>
-class dynamic_format_arg_store
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-    // Workaround a GCC template argument substitution bug.
-    : public basic_format_args<Context>
-#endif
-{
- private:
-  using char_type = typename Context::char_type;
-
-  template <typename T> struct need_copy {
-    static constexpr detail::type mapped_type =
-        detail::mapped_type_constant<T, Context>::value;
-
-    enum {
-      value = !(detail::is_reference_wrapper<T>::value ||
-                std::is_same<T, basic_string_view<char_type>>::value ||
-                std::is_same<T, detail::std_string_view<char_type>>::value ||
-                (mapped_type != detail::type::cstring_type &&
-                 mapped_type != detail::type::string_type &&
-                 mapped_type != detail::type::custom_type))
-    };
-  };
-
-  template <typename T>
-  using stored_type = conditional_t<
-      std::is_convertible<T, std::basic_string<char_type>>::value &&
-          !detail::is_reference_wrapper<T>::value,
-      std::basic_string<char_type>, T>;
-
-  // Storage of basic_format_arg must be contiguous.
-  std::vector<basic_format_arg<Context>> data_;
-  std::vector<detail::named_arg_info<char_type>> named_info_;
-
-  // Storage of arguments not fitting into basic_format_arg must grow
-  // without relocation because items in data_ refer to it.
-  detail::dynamic_arg_list dynamic_args_;
-
-  friend class basic_format_args<Context>;
-
-  auto get_types() const -> unsigned long long {
-    return detail::is_unpacked_bit | data_.size() |
-           (named_info_.empty()
-                ? 0ULL
-                : static_cast<unsigned long long>(detail::has_named_args_bit));
-  }
-
-  auto data() const -> const basic_format_arg<Context>* {
-    return named_info_.empty() ? data_.data() : data_.data() + 1;
-  }
-
-  template <typename T> void emplace_arg(const T& arg) {
-    data_.emplace_back(detail::make_arg<Context>(arg));
-  }
-
-  template <typename T>
-  void emplace_arg(const detail::named_arg<char_type, T>& arg) {
-    if (named_info_.empty()) {
-      constexpr const detail::named_arg_info<char_type>* zero_ptr{nullptr};
-      data_.insert(data_.begin(), {zero_ptr, 0});
-    }
-    data_.emplace_back(detail::make_arg<Context>(detail::unwrap(arg.value)));
-    auto pop_one = [](std::vector<basic_format_arg<Context>>* data) {
-      data->pop_back();
-    };
-    std::unique_ptr<std::vector<basic_format_arg<Context>>, decltype(pop_one)>
-        guard{&data_, pop_one};
-    named_info_.push_back({arg.name, static_cast<int>(data_.size() - 2u)});
-    data_[0].value_.named_args = {named_info_.data(), named_info_.size()};
-    guard.release();
-  }
-
- public:
-  constexpr dynamic_format_arg_store() = default;
-
-  /**
-    \rst
-    Adds an argument into the dynamic store for later passing to a formatting
-    function.
-
-    Note that custom types and string types (but not string views) are copied
-    into the store dynamically allocating memory if necessary.
-
-    **Example**::
-
-      fmt::dynamic_format_arg_store<fmt::format_context> store;
-      store.push_back(42);
-      store.push_back("abc");
-      store.push_back(1.5f);
-      std::string result = fmt::vformat("{} and {} and {}", store);
-    \endrst
-  */
-  template <typename T> void push_back(const T& arg) {
-    if (detail::const_check(need_copy<T>::value))
-      emplace_arg(dynamic_args_.push<stored_type<T>>(arg));
-    else
-      emplace_arg(detail::unwrap(arg));
-  }
-
-  /**
-    \rst
-    Adds a reference to the argument into the dynamic store for later passing to
-    a formatting function.
-
-    **Example**::
-
-      fmt::dynamic_format_arg_store<fmt::format_context> store;
-      char band[] = "Rolling Stones";
-      store.push_back(std::cref(band));
-      band[9] = 'c'; // Changing str affects the output.
-      std::string result = fmt::vformat("{}", store);
-      // result == "Rolling Scones"
-    \endrst
-  */
-  template <typename T> void push_back(std::reference_wrapper<T> arg) {
-    static_assert(
-        need_copy<T>::value,
-        "objects of built-in types and string views are always copied");
-    emplace_arg(arg.get());
-  }
-
-  /**
-    Adds named argument into the dynamic store for later passing to a formatting
-    function. ``std::reference_wrapper`` is supported to avoid copying of the
-    argument. The name is always copied into the store.
-  */
-  template <typename T>
-  void push_back(const detail::named_arg<char_type, T>& arg) {
-    const char_type* arg_name =
-        dynamic_args_.push<std::basic_string<char_type>>(arg.name).c_str();
-    if (detail::const_check(need_copy<T>::value)) {
-      emplace_arg(
-          fmt::arg(arg_name, dynamic_args_.push<stored_type<T>>(arg.value)));
-    } else {
-      emplace_arg(fmt::arg(arg_name, arg.value));
-    }
-  }
-
-  /** Erase all elements from the store */
-  void clear() {
-    data_.clear();
-    named_info_.clear();
-    dynamic_args_ = detail::dynamic_arg_list();
-  }
-
-  /**
-    \rst
-    Reserves space to store at least *new_cap* arguments including
-    *new_cap_named* named arguments.
-    \endrst
-  */
-  void reserve(size_t new_cap, size_t new_cap_named) {
-    FMT_ASSERT(new_cap >= new_cap_named,
-               "Set of arguments includes set of named arguments");
-    data_.reserve(new_cap);
-    named_info_.reserve(new_cap_named);
-  }
-};
-
-FMT_END_NAMESPACE
-
-#endif  // FMT_ARGS_H_
diff --git a/3party/fmt/include/fmt/chrono.h b/3party/fmt/include/fmt/chrono.h
deleted file mode 100644
index 9d54574..0000000
--- a/3party/fmt/include/fmt/chrono.h
+++ /dev/null
@@ -1,2240 +0,0 @@
-// Formatting library for C++ - chrono support
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_CHRONO_H_
-#define FMT_CHRONO_H_
-
-#include <algorithm>
-#include <chrono>
-#include <cmath>    // std::isfinite
-#include <cstring>  // std::memcpy
-#include <ctime>
-#include <iterator>
-#include <locale>
-#include <ostream>
-#include <type_traits>
-
-#include "ostream.h"  // formatbuf
-
-FMT_BEGIN_NAMESPACE
-
-// Check if std::chrono::local_t is available.
-#ifndef FMT_USE_LOCAL_TIME
-#  ifdef __cpp_lib_chrono
-#    define FMT_USE_LOCAL_TIME (__cpp_lib_chrono >= 201907L)
-#  else
-#    define FMT_USE_LOCAL_TIME 0
-#  endif
-#endif
-
-// Check if std::chrono::utc_timestamp is available.
-#ifndef FMT_USE_UTC_TIME
-#  ifdef __cpp_lib_chrono
-#    define FMT_USE_UTC_TIME (__cpp_lib_chrono >= 201907L)
-#  else
-#    define FMT_USE_UTC_TIME 0
-#  endif
-#endif
-
-// Enable tzset.
-#ifndef FMT_USE_TZSET
-// UWP doesn't provide _tzset.
-#  if FMT_HAS_INCLUDE("winapifamily.h")
-#    include <winapifamily.h>
-#  endif
-#  if defined(_WIN32) && (!defined(WINAPI_FAMILY) || \
-                          (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
-#    define FMT_USE_TZSET 1
-#  else
-#    define FMT_USE_TZSET 0
-#  endif
-#endif
-
-// Enable safe chrono durations, unless explicitly disabled.
-#ifndef FMT_SAFE_DURATION_CAST
-#  define FMT_SAFE_DURATION_CAST 1
-#endif
-#if FMT_SAFE_DURATION_CAST
-
-// For conversion between std::chrono::durations without undefined
-// behaviour or erroneous results.
-// This is a stripped down version of duration_cast, for inclusion in fmt.
-// See https://github.com/pauldreik/safe_duration_cast
-//
-// Copyright Paul Dreik 2019
-namespace safe_duration_cast {
-
-template <typename To, typename From,
-          FMT_ENABLE_IF(!std::is_same<From, To>::value &&
-                        std::numeric_limits<From>::is_signed ==
-                            std::numeric_limits<To>::is_signed)>
-FMT_CONSTEXPR auto lossless_integral_conversion(const From from, int& ec)
-    -> To {
-  ec = 0;
-  using F = std::numeric_limits<From>;
-  using T = std::numeric_limits<To>;
-  static_assert(F::is_integer, "From must be integral");
-  static_assert(T::is_integer, "To must be integral");
-
-  // A and B are both signed, or both unsigned.
-  if (detail::const_check(F::digits <= T::digits)) {
-    // From fits in To without any problem.
-  } else {
-    // From does not always fit in To, resort to a dynamic check.
-    if (from < (T::min)() || from > (T::max)()) {
-      // outside range.
-      ec = 1;
-      return {};
-    }
-  }
-  return static_cast<To>(from);
-}
-
-/**
- * converts From to To, without loss. If the dynamic value of from
- * can't be converted to To without loss, ec is set.
- */
-template <typename To, typename From,
-          FMT_ENABLE_IF(!std::is_same<From, To>::value &&
-                        std::numeric_limits<From>::is_signed !=
-                            std::numeric_limits<To>::is_signed)>
-FMT_CONSTEXPR auto lossless_integral_conversion(const From from, int& ec)
-    -> To {
-  ec = 0;
-  using F = std::numeric_limits<From>;
-  using T = std::numeric_limits<To>;
-  static_assert(F::is_integer, "From must be integral");
-  static_assert(T::is_integer, "To must be integral");
-
-  if (detail::const_check(F::is_signed && !T::is_signed)) {
-    // From may be negative, not allowed!
-    if (fmt::detail::is_negative(from)) {
-      ec = 1;
-      return {};
-    }
-    // From is positive. Can it always fit in To?
-    if (detail::const_check(F::digits > T::digits) &&
-        from > static_cast<From>(detail::max_value<To>())) {
-      ec = 1;
-      return {};
-    }
-  }
-
-  if (detail::const_check(!F::is_signed && T::is_signed &&
-                          F::digits >= T::digits) &&
-      from > static_cast<From>(detail::max_value<To>())) {
-    ec = 1;
-    return {};
-  }
-  return static_cast<To>(from);  // Lossless conversion.
-}
-
-template <typename To, typename From,
-          FMT_ENABLE_IF(std::is_same<From, To>::value)>
-FMT_CONSTEXPR auto lossless_integral_conversion(const From from, int& ec)
-    -> To {
-  ec = 0;
-  return from;
-}  // function
-
-// clang-format off
-/**
- * converts From to To if possible, otherwise ec is set.
- *
- * input                            |    output
- * ---------------------------------|---------------
- * NaN                              | NaN
- * Inf                              | Inf
- * normal, fits in output           | converted (possibly lossy)
- * normal, does not fit in output   | ec is set
- * subnormal                        | best effort
- * -Inf                             | -Inf
- */
-// clang-format on
-template <typename To, typename From,
-          FMT_ENABLE_IF(!std::is_same<From, To>::value)>
-FMT_CONSTEXPR auto safe_float_conversion(const From from, int& ec) -> To {
-  ec = 0;
-  using T = std::numeric_limits<To>;
-  static_assert(std::is_floating_point<From>::value, "From must be floating");
-  static_assert(std::is_floating_point<To>::value, "To must be floating");
-
-  // catch the only happy case
-  if (std::isfinite(from)) {
-    if (from >= T::lowest() && from <= (T::max)()) {
-      return static_cast<To>(from);
-    }
-    // not within range.
-    ec = 1;
-    return {};
-  }
-
-  // nan and inf will be preserved
-  return static_cast<To>(from);
-}  // function
-
-template <typename To, typename From,
-          FMT_ENABLE_IF(std::is_same<From, To>::value)>
-FMT_CONSTEXPR auto safe_float_conversion(const From from, int& ec) -> To {
-  ec = 0;
-  static_assert(std::is_floating_point<From>::value, "From must be floating");
-  return from;
-}
-
-/**
- * safe duration cast between integral durations
- */
-template <typename To, typename FromRep, typename FromPeriod,
-          FMT_ENABLE_IF(std::is_integral<FromRep>::value),
-          FMT_ENABLE_IF(std::is_integral<typename To::rep>::value)>
-auto safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
-                        int& ec) -> To {
-  using From = std::chrono::duration<FromRep, FromPeriod>;
-  ec = 0;
-  // the basic idea is that we need to convert from count() in the from type
-  // to count() in the To type, by multiplying it with this:
-  struct Factor
-      : std::ratio_divide<typename From::period, typename To::period> {};
-
-  static_assert(Factor::num > 0, "num must be positive");
-  static_assert(Factor::den > 0, "den must be positive");
-
-  // the conversion is like this: multiply from.count() with Factor::num
-  // /Factor::den and convert it to To::rep, all this without
-  // overflow/underflow. let's start by finding a suitable type that can hold
-  // both To, From and Factor::num
-  using IntermediateRep =
-      typename std::common_type<typename From::rep, typename To::rep,
-                                decltype(Factor::num)>::type;
-
-  // safe conversion to IntermediateRep
-  IntermediateRep count =
-      lossless_integral_conversion<IntermediateRep>(from.count(), ec);
-  if (ec) return {};
-  // multiply with Factor::num without overflow or underflow
-  if (detail::const_check(Factor::num != 1)) {
-    const auto max1 = detail::max_value<IntermediateRep>() / Factor::num;
-    if (count > max1) {
-      ec = 1;
-      return {};
-    }
-    const auto min1 =
-        (std::numeric_limits<IntermediateRep>::min)() / Factor::num;
-    if (detail::const_check(!std::is_unsigned<IntermediateRep>::value) &&
-        count < min1) {
-      ec = 1;
-      return {};
-    }
-    count *= Factor::num;
-  }
-
-  if (detail::const_check(Factor::den != 1)) count /= Factor::den;
-  auto tocount = lossless_integral_conversion<typename To::rep>(count, ec);
-  return ec ? To() : To(tocount);
-}
-
-/**
- * safe duration_cast between floating point durations
- */
-template <typename To, typename FromRep, typename FromPeriod,
-          FMT_ENABLE_IF(std::is_floating_point<FromRep>::value),
-          FMT_ENABLE_IF(std::is_floating_point<typename To::rep>::value)>
-auto safe_duration_cast(std::chrono::duration<FromRep, FromPeriod> from,
-                        int& ec) -> To {
-  using From = std::chrono::duration<FromRep, FromPeriod>;
-  ec = 0;
-  if (std::isnan(from.count())) {
-    // nan in, gives nan out. easy.
-    return To{std::numeric_limits<typename To::rep>::quiet_NaN()};
-  }
-  // maybe we should also check if from is denormal, and decide what to do about
-  // it.
-
-  // +-inf should be preserved.
-  if (std::isinf(from.count())) {
-    return To{from.count()};
-  }
-
-  // the basic idea is that we need to convert from count() in the from type
-  // to count() in the To type, by multiplying it with this:
-  struct Factor
-      : std::ratio_divide<typename From::period, typename To::period> {};
-
-  static_assert(Factor::num > 0, "num must be positive");
-  static_assert(Factor::den > 0, "den must be positive");
-
-  // the conversion is like this: multiply from.count() with Factor::num
-  // /Factor::den and convert it to To::rep, all this without
-  // overflow/underflow. let's start by finding a suitable type that can hold
-  // both To, From and Factor::num
-  using IntermediateRep =
-      typename std::common_type<typename From::rep, typename To::rep,
-                                decltype(Factor::num)>::type;
-
-  // force conversion of From::rep -> IntermediateRep to be safe,
-  // even if it will never happen be narrowing in this context.
-  IntermediateRep count =
-      safe_float_conversion<IntermediateRep>(from.count(), ec);
-  if (ec) {
-    return {};
-  }
-
-  // multiply with Factor::num without overflow or underflow
-  if (detail::const_check(Factor::num != 1)) {
-    constexpr auto max1 = detail::max_value<IntermediateRep>() /
-                          static_cast<IntermediateRep>(Factor::num);
-    if (count > max1) {
-      ec = 1;
-      return {};
-    }
-    constexpr auto min1 = std::numeric_limits<IntermediateRep>::lowest() /
-                          static_cast<IntermediateRep>(Factor::num);
-    if (count < min1) {
-      ec = 1;
-      return {};
-    }
-    count *= static_cast<IntermediateRep>(Factor::num);
-  }
-
-  // this can't go wrong, right? den>0 is checked earlier.
-  if (detail::const_check(Factor::den != 1)) {
-    using common_t = typename std::common_type<IntermediateRep, intmax_t>::type;
-    count /= static_cast<common_t>(Factor::den);
-  }
-
-  // convert to the to type, safely
-  using ToRep = typename To::rep;
-
-  const ToRep tocount = safe_float_conversion<ToRep>(count, ec);
-  if (ec) {
-    return {};
-  }
-  return To{tocount};
-}
-}  // namespace safe_duration_cast
-#endif
-
-// Prevents expansion of a preceding token as a function-style macro.
-// Usage: f FMT_NOMACRO()
-#define FMT_NOMACRO
-
-namespace detail {
-template <typename T = void> struct null {};
-inline auto localtime_r FMT_NOMACRO(...) -> null<> { return null<>(); }
-inline auto localtime_s(...) -> null<> { return null<>(); }
-inline auto gmtime_r(...) -> null<> { return null<>(); }
-inline auto gmtime_s(...) -> null<> { return null<>(); }
-
-inline auto get_classic_locale() -> const std::locale& {
-  static const auto& locale = std::locale::classic();
-  return locale;
-}
-
-template <typename CodeUnit> struct codecvt_result {
-  static constexpr const size_t max_size = 32;
-  CodeUnit buf[max_size];
-  CodeUnit* end;
-};
-
-template <typename CodeUnit>
-void write_codecvt(codecvt_result<CodeUnit>& out, string_view in_buf,
-                   const std::locale& loc) {
-#if FMT_CLANG_VERSION
-#  pragma clang diagnostic push
-#  pragma clang diagnostic ignored "-Wdeprecated"
-  auto& f = std::use_facet<std::codecvt<CodeUnit, char, std::mbstate_t>>(loc);
-#  pragma clang diagnostic pop
-#else
-  auto& f = std::use_facet<std::codecvt<CodeUnit, char, std::mbstate_t>>(loc);
-#endif
-  auto mb = std::mbstate_t();
-  const char* from_next = nullptr;
-  auto result = f.in(mb, in_buf.begin(), in_buf.end(), from_next,
-                     std::begin(out.buf), std::end(out.buf), out.end);
-  if (result != std::codecvt_base::ok)
-    FMT_THROW(format_error("failed to format time"));
-}
-
-template <typename OutputIt>
-auto write_encoded_tm_str(OutputIt out, string_view in, const std::locale& loc)
-    -> OutputIt {
-  if (detail::is_utf8() && loc != get_classic_locale()) {
-    // char16_t and char32_t codecvts are broken in MSVC (linkage errors) and
-    // gcc-4.
-#if FMT_MSC_VERSION != 0 || \
-    (defined(__GLIBCXX__) && !defined(_GLIBCXX_USE_DUAL_ABI))
-    // The _GLIBCXX_USE_DUAL_ABI macro is always defined in libstdc++ from gcc-5
-    // and newer.
-    using code_unit = wchar_t;
-#else
-    using code_unit = char32_t;
-#endif
-
-    using unit_t = codecvt_result<code_unit>;
-    unit_t unit;
-    write_codecvt(unit, in, loc);
-    // In UTF-8 is used one to four one-byte code units.
-    auto u =
-        to_utf8<code_unit, basic_memory_buffer<char, unit_t::max_size * 4>>();
-    if (!u.convert({unit.buf, to_unsigned(unit.end - unit.buf)}))
-      FMT_THROW(format_error("failed to format time"));
-    return copy_str<char>(u.c_str(), u.c_str() + u.size(), out);
-  }
-  return copy_str<char>(in.data(), in.data() + in.size(), out);
-}
-
-template <typename Char, typename OutputIt,
-          FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
-auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc)
-    -> OutputIt {
-  codecvt_result<Char> unit;
-  write_codecvt(unit, sv, loc);
-  return copy_str<Char>(unit.buf, unit.end, out);
-}
-
-template <typename Char, typename OutputIt,
-          FMT_ENABLE_IF(std::is_same<Char, char>::value)>
-auto write_tm_str(OutputIt out, string_view sv, const std::locale& loc)
-    -> OutputIt {
-  return write_encoded_tm_str(out, sv, loc);
-}
-
-template <typename Char>
-inline void do_write(buffer<Char>& buf, const std::tm& time,
-                     const std::locale& loc, char format, char modifier) {
-  auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
-  auto&& os = std::basic_ostream<Char>(&format_buf);
-  os.imbue(loc);
-  const auto& facet = std::use_facet<std::time_put<Char>>(loc);
-  auto end = facet.put(os, os, Char(' '), &time, format, modifier);
-  if (end.failed()) FMT_THROW(format_error("failed to format time"));
-}
-
-template <typename Char, typename OutputIt,
-          FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
-auto write(OutputIt out, const std::tm& time, const std::locale& loc,
-           char format, char modifier = 0) -> OutputIt {
-  auto&& buf = get_buffer<Char>(out);
-  do_write<Char>(buf, time, loc, format, modifier);
-  return get_iterator(buf, out);
-}
-
-template <typename Char, typename OutputIt,
-          FMT_ENABLE_IF(std::is_same<Char, char>::value)>
-auto write(OutputIt out, const std::tm& time, const std::locale& loc,
-           char format, char modifier = 0) -> OutputIt {
-  auto&& buf = basic_memory_buffer<Char>();
-  do_write<char>(buf, time, loc, format, modifier);
-  return write_encoded_tm_str(out, string_view(buf.data(), buf.size()), loc);
-}
-
-template <typename Rep1, typename Rep2>
-struct is_same_arithmetic_type
-    : public std::integral_constant<bool,
-                                    (std::is_integral<Rep1>::value &&
-                                     std::is_integral<Rep2>::value) ||
-                                        (std::is_floating_point<Rep1>::value &&
-                                         std::is_floating_point<Rep2>::value)> {
-};
-
-template <
-    typename To, typename FromRep, typename FromPeriod,
-    FMT_ENABLE_IF(is_same_arithmetic_type<FromRep, typename To::rep>::value)>
-auto fmt_duration_cast(std::chrono::duration<FromRep, FromPeriod> from) -> To {
-#if FMT_SAFE_DURATION_CAST
-  // Throwing version of safe_duration_cast is only available for
-  // integer to integer or float to float casts.
-  int ec;
-  To to = safe_duration_cast::safe_duration_cast<To>(from, ec);
-  if (ec) FMT_THROW(format_error("cannot format duration"));
-  return to;
-#else
-  // Standard duration cast, may overflow.
-  return std::chrono::duration_cast<To>(from);
-#endif
-}
-
-template <
-    typename To, typename FromRep, typename FromPeriod,
-    FMT_ENABLE_IF(!is_same_arithmetic_type<FromRep, typename To::rep>::value)>
-auto fmt_duration_cast(std::chrono::duration<FromRep, FromPeriod> from) -> To {
-  // Mixed integer <-> float cast is not supported by safe_duration_cast.
-  return std::chrono::duration_cast<To>(from);
-}
-
-template <typename Duration>
-auto to_time_t(
-    std::chrono::time_point<std::chrono::system_clock, Duration> time_point)
-    -> std::time_t {
-  // Cannot use std::chrono::system_clock::to_time_t since this would first
-  // require a cast to std::chrono::system_clock::time_point, which could
-  // overflow.
-  return fmt_duration_cast<std::chrono::duration<std::time_t>>(
-             time_point.time_since_epoch())
-      .count();
-}
-}  // namespace detail
-
-FMT_BEGIN_EXPORT
-
-/**
-  Converts given time since epoch as ``std::time_t`` value into calendar time,
-  expressed in local time. Unlike ``std::localtime``, this function is
-  thread-safe on most platforms.
- */
-inline auto localtime(std::time_t time) -> std::tm {
-  struct dispatcher {
-    std::time_t time_;
-    std::tm tm_;
-
-    dispatcher(std::time_t t) : time_(t) {}
-
-    auto run() -> bool {
-      using namespace fmt::detail;
-      return handle(localtime_r(&time_, &tm_));
-    }
-
-    auto handle(std::tm* tm) -> bool { return tm != nullptr; }
-
-    auto handle(detail::null<>) -> bool {
-      using namespace fmt::detail;
-      return fallback(localtime_s(&tm_, &time_));
-    }
-
-    auto fallback(int res) -> bool { return res == 0; }
-
-#if !FMT_MSC_VERSION
-    auto fallback(detail::null<>) -> bool {
-      using namespace fmt::detail;
-      std::tm* tm = std::localtime(&time_);
-      if (tm) tm_ = *tm;
-      return tm != nullptr;
-    }
-#endif
-  };
-  dispatcher lt(time);
-  // Too big time values may be unsupported.
-  if (!lt.run()) FMT_THROW(format_error("time_t value out of range"));
-  return lt.tm_;
-}
-
-#if FMT_USE_LOCAL_TIME
-template <typename Duration>
-inline auto localtime(std::chrono::local_time<Duration> time) -> std::tm {
-  return localtime(
-      detail::to_time_t(std::chrono::current_zone()->to_sys(time)));
-}
-#endif
-
-/**
-  Converts given time since epoch as ``std::time_t`` value into calendar time,
-  expressed in Coordinated Universal Time (UTC). Unlike ``std::gmtime``, this
-  function is thread-safe on most platforms.
- */
-inline auto gmtime(std::time_t time) -> std::tm {
-  struct dispatcher {
-    std::time_t time_;
-    std::tm tm_;
-
-    dispatcher(std::time_t t) : time_(t) {}
-
-    auto run() -> bool {
-      using namespace fmt::detail;
-      return handle(gmtime_r(&time_, &tm_));
-    }
-
-    auto handle(std::tm* tm) -> bool { return tm != nullptr; }
-
-    auto handle(detail::null<>) -> bool {
-      using namespace fmt::detail;
-      return fallback(gmtime_s(&tm_, &time_));
-    }
-
-    auto fallback(int res) -> bool { return res == 0; }
-
-#if !FMT_MSC_VERSION
-    auto fallback(detail::null<>) -> bool {
-      std::tm* tm = std::gmtime(&time_);
-      if (tm) tm_ = *tm;
-      return tm != nullptr;
-    }
-#endif
-  };
-  auto gt = dispatcher(time);
-  // Too big time values may be unsupported.
-  if (!gt.run()) FMT_THROW(format_error("time_t value out of range"));
-  return gt.tm_;
-}
-
-template <typename Duration>
-inline auto gmtime(
-    std::chrono::time_point<std::chrono::system_clock, Duration> time_point)
-    -> std::tm {
-  return gmtime(detail::to_time_t(time_point));
-}
-
-namespace detail {
-
-// Writes two-digit numbers a, b and c separated by sep to buf.
-// The method by Pavel Novikov based on
-// https://johnnylee-sde.github.io/Fast-unsigned-integer-to-time-string/.
-inline void write_digit2_separated(char* buf, unsigned a, unsigned b,
-                                   unsigned c, char sep) {
-  unsigned long long digits =
-      a | (b << 24) | (static_cast<unsigned long long>(c) << 48);
-  // Convert each value to BCD.
-  // We have x = a * 10 + b and we want to convert it to BCD y = a * 16 + b.
-  // The difference is
-  //   y - x = a * 6
-  // a can be found from x:
-  //   a = floor(x / 10)
-  // then
-  //   y = x + a * 6 = x + floor(x / 10) * 6
-  // floor(x / 10) is (x * 205) >> 11 (needs 16 bits).
-  digits += (((digits * 205) >> 11) & 0x000f00000f00000f) * 6;
-  // Put low nibbles to high bytes and high nibbles to low bytes.
-  digits = ((digits & 0x00f00000f00000f0) >> 4) |
-           ((digits & 0x000f00000f00000f) << 8);
-  auto usep = static_cast<unsigned long long>(sep);
-  // Add ASCII '0' to each digit byte and insert separators.
-  digits |= 0x3030003030003030 | (usep << 16) | (usep << 40);
-
-  constexpr const size_t len = 8;
-  if (const_check(is_big_endian())) {
-    char tmp[len];
-    std::memcpy(tmp, &digits, len);
-    std::reverse_copy(tmp, tmp + len, buf);
-  } else {
-    std::memcpy(buf, &digits, len);
-  }
-}
-
-template <typename Period>
-FMT_CONSTEXPR inline auto get_units() -> const char* {
-  if (std::is_same<Period, std::atto>::value) return "as";
-  if (std::is_same<Period, std::femto>::value) return "fs";
-  if (std::is_same<Period, std::pico>::value) return "ps";
-  if (std::is_same<Period, std::nano>::value) return "ns";
-  if (std::is_same<Period, std::micro>::value) return "µs";
-  if (std::is_same<Period, std::milli>::value) return "ms";
-  if (std::is_same<Period, std::centi>::value) return "cs";
-  if (std::is_same<Period, std::deci>::value) return "ds";
-  if (std::is_same<Period, std::ratio<1>>::value) return "s";
-  if (std::is_same<Period, std::deca>::value) return "das";
-  if (std::is_same<Period, std::hecto>::value) return "hs";
-  if (std::is_same<Period, std::kilo>::value) return "ks";
-  if (std::is_same<Period, std::mega>::value) return "Ms";
-  if (std::is_same<Period, std::giga>::value) return "Gs";
-  if (std::is_same<Period, std::tera>::value) return "Ts";
-  if (std::is_same<Period, std::peta>::value) return "Ps";
-  if (std::is_same<Period, std::exa>::value) return "Es";
-  if (std::is_same<Period, std::ratio<60>>::value) return "min";
-  if (std::is_same<Period, std::ratio<3600>>::value) return "h";
-  if (std::is_same<Period, std::ratio<86400>>::value) return "d";
-  return nullptr;
-}
-
-enum class numeric_system {
-  standard,
-  // Alternative numeric system, e.g. 十二 instead of 12 in ja_JP locale.
-  alternative
-};
-
-// Glibc extensions for formatting numeric values.
-enum class pad_type {
-  unspecified,
-  // Do not pad a numeric result string.
-  none,
-  // Pad a numeric result string with zeros even if the conversion specifier
-  // character uses space-padding by default.
-  zero,
-  // Pad a numeric result string with spaces.
-  space,
-};
-
-template <typename OutputIt>
-auto write_padding(OutputIt out, pad_type pad, int width) -> OutputIt {
-  if (pad == pad_type::none) return out;
-  return std::fill_n(out, width, pad == pad_type::space ? ' ' : '0');
-}
-
-template <typename OutputIt>
-auto write_padding(OutputIt out, pad_type pad) -> OutputIt {
-  if (pad != pad_type::none) *out++ = pad == pad_type::space ? ' ' : '0';
-  return out;
-}
-
-// Parses a put_time-like format string and invokes handler actions.
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto parse_chrono_format(const Char* begin, const Char* end,
-                                       Handler&& handler) -> const Char* {
-  if (begin == end || *begin == '}') return begin;
-  if (*begin != '%') FMT_THROW(format_error("invalid format"));
-  auto ptr = begin;
-  pad_type pad = pad_type::unspecified;
-  while (ptr != end) {
-    auto c = *ptr;
-    if (c == '}') break;
-    if (c != '%') {
-      ++ptr;
-      continue;
-    }
-    if (begin != ptr) handler.on_text(begin, ptr);
-    ++ptr;  // consume '%'
-    if (ptr == end) FMT_THROW(format_error("invalid format"));
-    c = *ptr;
-    switch (c) {
-    case '_':
-      pad = pad_type::space;
-      ++ptr;
-      break;
-    case '-':
-      pad = pad_type::none;
-      ++ptr;
-      break;
-    case '0':
-      pad = pad_type::zero;
-      ++ptr;
-      break;
-    }
-    if (ptr == end) FMT_THROW(format_error("invalid format"));
-    c = *ptr++;
-    switch (c) {
-    case '%':
-      handler.on_text(ptr - 1, ptr);
-      break;
-    case 'n': {
-      const Char newline[] = {'\n'};
-      handler.on_text(newline, newline + 1);
-      break;
-    }
-    case 't': {
-      const Char tab[] = {'\t'};
-      handler.on_text(tab, tab + 1);
-      break;
-    }
-    // Year:
-    case 'Y':
-      handler.on_year(numeric_system::standard);
-      break;
-    case 'y':
-      handler.on_short_year(numeric_system::standard);
-      break;
-    case 'C':
-      handler.on_century(numeric_system::standard);
-      break;
-    case 'G':
-      handler.on_iso_week_based_year();
-      break;
-    case 'g':
-      handler.on_iso_week_based_short_year();
-      break;
-    // Day of the week:
-    case 'a':
-      handler.on_abbr_weekday();
-      break;
-    case 'A':
-      handler.on_full_weekday();
-      break;
-    case 'w':
-      handler.on_dec0_weekday(numeric_system::standard);
-      break;
-    case 'u':
-      handler.on_dec1_weekday(numeric_system::standard);
-      break;
-    // Month:
-    case 'b':
-    case 'h':
-      handler.on_abbr_month();
-      break;
-    case 'B':
-      handler.on_full_month();
-      break;
-    case 'm':
-      handler.on_dec_month(numeric_system::standard);
-      break;
-    // Day of the year/month:
-    case 'U':
-      handler.on_dec0_week_of_year(numeric_system::standard);
-      break;
-    case 'W':
-      handler.on_dec1_week_of_year(numeric_system::standard);
-      break;
-    case 'V':
-      handler.on_iso_week_of_year(numeric_system::standard);
-      break;
-    case 'j':
-      handler.on_day_of_year();
-      break;
-    case 'd':
-      handler.on_day_of_month(numeric_system::standard);
-      break;
-    case 'e':
-      handler.on_day_of_month_space(numeric_system::standard);
-      break;
-    // Hour, minute, second:
-    case 'H':
-      handler.on_24_hour(numeric_system::standard, pad);
-      break;
-    case 'I':
-      handler.on_12_hour(numeric_system::standard, pad);
-      break;
-    case 'M':
-      handler.on_minute(numeric_system::standard, pad);
-      break;
-    case 'S':
-      handler.on_second(numeric_system::standard, pad);
-      break;
-    // Other:
-    case 'c':
-      handler.on_datetime(numeric_system::standard);
-      break;
-    case 'x':
-      handler.on_loc_date(numeric_system::standard);
-      break;
-    case 'X':
-      handler.on_loc_time(numeric_system::standard);
-      break;
-    case 'D':
-      handler.on_us_date();
-      break;
-    case 'F':
-      handler.on_iso_date();
-      break;
-    case 'r':
-      handler.on_12_hour_time();
-      break;
-    case 'R':
-      handler.on_24_hour_time();
-      break;
-    case 'T':
-      handler.on_iso_time();
-      break;
-    case 'p':
-      handler.on_am_pm();
-      break;
-    case 'Q':
-      handler.on_duration_value();
-      break;
-    case 'q':
-      handler.on_duration_unit();
-      break;
-    case 'z':
-      handler.on_utc_offset(numeric_system::standard);
-      break;
-    case 'Z':
-      handler.on_tz_name();
-      break;
-    // Alternative representation:
-    case 'E': {
-      if (ptr == end) FMT_THROW(format_error("invalid format"));
-      c = *ptr++;
-      switch (c) {
-      case 'Y':
-        handler.on_year(numeric_system::alternative);
-        break;
-      case 'y':
-        handler.on_offset_year();
-        break;
-      case 'C':
-        handler.on_century(numeric_system::alternative);
-        break;
-      case 'c':
-        handler.on_datetime(numeric_system::alternative);
-        break;
-      case 'x':
-        handler.on_loc_date(numeric_system::alternative);
-        break;
-      case 'X':
-        handler.on_loc_time(numeric_system::alternative);
-        break;
-      case 'z':
-        handler.on_utc_offset(numeric_system::alternative);
-        break;
-      default:
-        FMT_THROW(format_error("invalid format"));
-      }
-      break;
-    }
-    case 'O':
-      if (ptr == end) FMT_THROW(format_error("invalid format"));
-      c = *ptr++;
-      switch (c) {
-      case 'y':
-        handler.on_short_year(numeric_system::alternative);
-        break;
-      case 'm':
-        handler.on_dec_month(numeric_system::alternative);
-        break;
-      case 'U':
-        handler.on_dec0_week_of_year(numeric_system::alternative);
-        break;
-      case 'W':
-        handler.on_dec1_week_of_year(numeric_system::alternative);
-        break;
-      case 'V':
-        handler.on_iso_week_of_year(numeric_system::alternative);
-        break;
-      case 'd':
-        handler.on_day_of_month(numeric_system::alternative);
-        break;
-      case 'e':
-        handler.on_day_of_month_space(numeric_system::alternative);
-        break;
-      case 'w':
-        handler.on_dec0_weekday(numeric_system::alternative);
-        break;
-      case 'u':
-        handler.on_dec1_weekday(numeric_system::alternative);
-        break;
-      case 'H':
-        handler.on_24_hour(numeric_system::alternative, pad);
-        break;
-      case 'I':
-        handler.on_12_hour(numeric_system::alternative, pad);
-        break;
-      case 'M':
-        handler.on_minute(numeric_system::alternative, pad);
-        break;
-      case 'S':
-        handler.on_second(numeric_system::alternative, pad);
-        break;
-      case 'z':
-        handler.on_utc_offset(numeric_system::alternative);
-        break;
-      default:
-        FMT_THROW(format_error("invalid format"));
-      }
-      break;
-    default:
-      FMT_THROW(format_error("invalid format"));
-    }
-    begin = ptr;
-  }
-  if (begin != ptr) handler.on_text(begin, ptr);
-  return ptr;
-}
-
-template <typename Derived> struct null_chrono_spec_handler {
-  FMT_CONSTEXPR void unsupported() {
-    static_cast<Derived*>(this)->unsupported();
-  }
-  FMT_CONSTEXPR void on_year(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_short_year(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_offset_year() { unsupported(); }
-  FMT_CONSTEXPR void on_century(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_iso_week_based_year() { unsupported(); }
-  FMT_CONSTEXPR void on_iso_week_based_short_year() { unsupported(); }
-  FMT_CONSTEXPR void on_abbr_weekday() { unsupported(); }
-  FMT_CONSTEXPR void on_full_weekday() { unsupported(); }
-  FMT_CONSTEXPR void on_dec0_weekday(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_dec1_weekday(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_abbr_month() { unsupported(); }
-  FMT_CONSTEXPR void on_full_month() { unsupported(); }
-  FMT_CONSTEXPR void on_dec_month(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_day_of_year() { unsupported(); }
-  FMT_CONSTEXPR void on_day_of_month(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_day_of_month_space(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_24_hour(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_12_hour(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_minute(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_second(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_datetime(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_loc_date(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_loc_time(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_us_date() { unsupported(); }
-  FMT_CONSTEXPR void on_iso_date() { unsupported(); }
-  FMT_CONSTEXPR void on_12_hour_time() { unsupported(); }
-  FMT_CONSTEXPR void on_24_hour_time() { unsupported(); }
-  FMT_CONSTEXPR void on_iso_time() { unsupported(); }
-  FMT_CONSTEXPR void on_am_pm() { unsupported(); }
-  FMT_CONSTEXPR void on_duration_value() { unsupported(); }
-  FMT_CONSTEXPR void on_duration_unit() { unsupported(); }
-  FMT_CONSTEXPR void on_utc_offset(numeric_system) { unsupported(); }
-  FMT_CONSTEXPR void on_tz_name() { unsupported(); }
-};
-
-struct tm_format_checker : null_chrono_spec_handler<tm_format_checker> {
-  FMT_NORETURN void unsupported() { FMT_THROW(format_error("no format")); }
-
-  template <typename Char>
-  FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
-  FMT_CONSTEXPR void on_year(numeric_system) {}
-  FMT_CONSTEXPR void on_short_year(numeric_system) {}
-  FMT_CONSTEXPR void on_offset_year() {}
-  FMT_CONSTEXPR void on_century(numeric_system) {}
-  FMT_CONSTEXPR void on_iso_week_based_year() {}
-  FMT_CONSTEXPR void on_iso_week_based_short_year() {}
-  FMT_CONSTEXPR void on_abbr_weekday() {}
-  FMT_CONSTEXPR void on_full_weekday() {}
-  FMT_CONSTEXPR void on_dec0_weekday(numeric_system) {}
-  FMT_CONSTEXPR void on_dec1_weekday(numeric_system) {}
-  FMT_CONSTEXPR void on_abbr_month() {}
-  FMT_CONSTEXPR void on_full_month() {}
-  FMT_CONSTEXPR void on_dec_month(numeric_system) {}
-  FMT_CONSTEXPR void on_dec0_week_of_year(numeric_system) {}
-  FMT_CONSTEXPR void on_dec1_week_of_year(numeric_system) {}
-  FMT_CONSTEXPR void on_iso_week_of_year(numeric_system) {}
-  FMT_CONSTEXPR void on_day_of_year() {}
-  FMT_CONSTEXPR void on_day_of_month(numeric_system) {}
-  FMT_CONSTEXPR void on_day_of_month_space(numeric_system) {}
-  FMT_CONSTEXPR void on_24_hour(numeric_system, pad_type) {}
-  FMT_CONSTEXPR void on_12_hour(numeric_system, pad_type) {}
-  FMT_CONSTEXPR void on_minute(numeric_system, pad_type) {}
-  FMT_CONSTEXPR void on_second(numeric_system, pad_type) {}
-  FMT_CONSTEXPR void on_datetime(numeric_system) {}
-  FMT_CONSTEXPR void on_loc_date(numeric_system) {}
-  FMT_CONSTEXPR void on_loc_time(numeric_system) {}
-  FMT_CONSTEXPR void on_us_date() {}
-  FMT_CONSTEXPR void on_iso_date() {}
-  FMT_CONSTEXPR void on_12_hour_time() {}
-  FMT_CONSTEXPR void on_24_hour_time() {}
-  FMT_CONSTEXPR void on_iso_time() {}
-  FMT_CONSTEXPR void on_am_pm() {}
-  FMT_CONSTEXPR void on_utc_offset(numeric_system) {}
-  FMT_CONSTEXPR void on_tz_name() {}
-};
-
-inline auto tm_wday_full_name(int wday) -> const char* {
-  static constexpr const char* full_name_list[] = {
-      "Sunday",   "Monday", "Tuesday", "Wednesday",
-      "Thursday", "Friday", "Saturday"};
-  return wday >= 0 && wday <= 6 ? full_name_list[wday] : "?";
-}
-inline auto tm_wday_short_name(int wday) -> const char* {
-  static constexpr const char* short_name_list[] = {"Sun", "Mon", "Tue", "Wed",
-                                                    "Thu", "Fri", "Sat"};
-  return wday >= 0 && wday <= 6 ? short_name_list[wday] : "???";
-}
-
-inline auto tm_mon_full_name(int mon) -> const char* {
-  static constexpr const char* full_name_list[] = {
-      "January", "February", "March",     "April",   "May",      "June",
-      "July",    "August",   "September", "October", "November", "December"};
-  return mon >= 0 && mon <= 11 ? full_name_list[mon] : "?";
-}
-inline auto tm_mon_short_name(int mon) -> const char* {
-  static constexpr const char* short_name_list[] = {
-      "Jan", "Feb", "Mar", "Apr", "May", "Jun",
-      "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
-  };
-  return mon >= 0 && mon <= 11 ? short_name_list[mon] : "???";
-}
-
-template <typename T, typename = void>
-struct has_member_data_tm_gmtoff : std::false_type {};
-template <typename T>
-struct has_member_data_tm_gmtoff<T, void_t<decltype(T::tm_gmtoff)>>
-    : std::true_type {};
-
-template <typename T, typename = void>
-struct has_member_data_tm_zone : std::false_type {};
-template <typename T>
-struct has_member_data_tm_zone<T, void_t<decltype(T::tm_zone)>>
-    : std::true_type {};
-
-#if FMT_USE_TZSET
-inline void tzset_once() {
-  static bool init = []() -> bool {
-    _tzset();
-    return true;
-  }();
-  ignore_unused(init);
-}
-#endif
-
-// Converts value to Int and checks that it's in the range [0, upper).
-template <typename T, typename Int, FMT_ENABLE_IF(std::is_integral<T>::value)>
-inline auto to_nonnegative_int(T value, Int upper) -> Int {
-  if (!std::is_unsigned<Int>::value &&
-      (value < 0 || to_unsigned(value) > to_unsigned(upper))) {
-    FMT_THROW(fmt::format_error("chrono value is out of range"));
-  }
-  return static_cast<Int>(value);
-}
-template <typename T, typename Int, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-inline auto to_nonnegative_int(T value, Int upper) -> Int {
-  if (value < 0 || value > static_cast<T>(upper))
-    FMT_THROW(format_error("invalid value"));
-  return static_cast<Int>(value);
-}
-
-constexpr auto pow10(std::uint32_t n) -> long long {
-  return n == 0 ? 1 : 10 * pow10(n - 1);
-}
-
-// Counts the number of fractional digits in the range [0, 18] according to the
-// C++20 spec. If more than 18 fractional digits are required then returns 6 for
-// microseconds precision.
-template <long long Num, long long Den, int N = 0,
-          bool Enabled = (N < 19) && (Num <= max_value<long long>() / 10)>
-struct count_fractional_digits {
-  static constexpr int value =
-      Num % Den == 0 ? N : count_fractional_digits<Num * 10, Den, N + 1>::value;
-};
-
-// Base case that doesn't instantiate any more templates
-// in order to avoid overflow.
-template <long long Num, long long Den, int N>
-struct count_fractional_digits<Num, Den, N, false> {
-  static constexpr int value = (Num % Den == 0) ? N : 6;
-};
-
-// Format subseconds which are given as an integer type with an appropriate
-// number of digits.
-template <typename Char, typename OutputIt, typename Duration>
-void write_fractional_seconds(OutputIt& out, Duration d, int precision = -1) {
-  constexpr auto num_fractional_digits =
-      count_fractional_digits<Duration::period::num,
-                              Duration::period::den>::value;
-
-  using subsecond_precision = std::chrono::duration<
-      typename std::common_type<typename Duration::rep,
-                                std::chrono::seconds::rep>::type,
-      std::ratio<1, detail::pow10(num_fractional_digits)>>;
-
-  const auto fractional = d - fmt_duration_cast<std::chrono::seconds>(d);
-  const auto subseconds =
-      std::chrono::treat_as_floating_point<
-          typename subsecond_precision::rep>::value
-          ? fractional.count()
-          : fmt_duration_cast<subsecond_precision>(fractional).count();
-  auto n = static_cast<uint32_or_64_or_128_t<long long>>(subseconds);
-  const int num_digits = detail::count_digits(n);
-
-  int leading_zeroes = (std::max)(0, num_fractional_digits - num_digits);
-  if (precision < 0) {
-    FMT_ASSERT(!std::is_floating_point<typename Duration::rep>::value, "");
-    if (std::ratio_less<typename subsecond_precision::period,
-                        std::chrono::seconds::period>::value) {
-      *out++ = '.';
-      out = std::fill_n(out, leading_zeroes, '0');
-      out = format_decimal<Char>(out, n, num_digits).end;
-    }
-  } else {
-    *out++ = '.';
-    leading_zeroes = (std::min)(leading_zeroes, precision);
-    out = std::fill_n(out, leading_zeroes, '0');
-    int remaining = precision - leading_zeroes;
-    if (remaining != 0 && remaining < num_digits) {
-      n /= to_unsigned(detail::pow10(to_unsigned(num_digits - remaining)));
-      out = format_decimal<Char>(out, n, remaining).end;
-      return;
-    }
-    out = format_decimal<Char>(out, n, num_digits).end;
-    remaining -= num_digits;
-    out = std::fill_n(out, remaining, '0');
-  }
-}
-
-// Format subseconds which are given as a floating point type with an
-// appropriate number of digits. We cannot pass the Duration here, as we
-// explicitly need to pass the Rep value in the chrono_formatter.
-template <typename Duration>
-void write_floating_seconds(memory_buffer& buf, Duration duration,
-                            int num_fractional_digits = -1) {
-  using rep = typename Duration::rep;
-  FMT_ASSERT(std::is_floating_point<rep>::value, "");
-
-  auto val = duration.count();
-
-  if (num_fractional_digits < 0) {
-    // For `std::round` with fallback to `round`:
-    // On some toolchains `std::round` is not available (e.g. GCC 6).
-    using namespace std;
-    num_fractional_digits =
-        count_fractional_digits<Duration::period::num,
-                                Duration::period::den>::value;
-    if (num_fractional_digits < 6 && static_cast<rep>(round(val)) != val)
-      num_fractional_digits = 6;
-  }
-
-  fmt::format_to(std::back_inserter(buf), FMT_STRING("{:.{}f}"),
-                 std::fmod(val * static_cast<rep>(Duration::period::num) /
-                               static_cast<rep>(Duration::period::den),
-                           static_cast<rep>(60)),
-                 num_fractional_digits);
-}
-
-template <typename OutputIt, typename Char,
-          typename Duration = std::chrono::seconds>
-class tm_writer {
- private:
-  static constexpr int days_per_week = 7;
-
-  const std::locale& loc_;
-  const bool is_classic_;
-  OutputIt out_;
-  const Duration* subsecs_;
-  const std::tm& tm_;
-
-  auto tm_sec() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_sec >= 0 && tm_.tm_sec <= 61, "");
-    return tm_.tm_sec;
-  }
-  auto tm_min() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_min >= 0 && tm_.tm_min <= 59, "");
-    return tm_.tm_min;
-  }
-  auto tm_hour() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_hour >= 0 && tm_.tm_hour <= 23, "");
-    return tm_.tm_hour;
-  }
-  auto tm_mday() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_mday >= 1 && tm_.tm_mday <= 31, "");
-    return tm_.tm_mday;
-  }
-  auto tm_mon() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_mon >= 0 && tm_.tm_mon <= 11, "");
-    return tm_.tm_mon;
-  }
-  auto tm_year() const noexcept -> long long { return 1900ll + tm_.tm_year; }
-  auto tm_wday() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_wday >= 0 && tm_.tm_wday <= 6, "");
-    return tm_.tm_wday;
-  }
-  auto tm_yday() const noexcept -> int {
-    FMT_ASSERT(tm_.tm_yday >= 0 && tm_.tm_yday <= 365, "");
-    return tm_.tm_yday;
-  }
-
-  auto tm_hour12() const noexcept -> int {
-    const auto h = tm_hour();
-    const auto z = h < 12 ? h : h - 12;
-    return z == 0 ? 12 : z;
-  }
-
-  // POSIX and the C Standard are unclear or inconsistent about what %C and %y
-  // do if the year is negative or exceeds 9999. Use the convention that %C
-  // concatenated with %y yields the same output as %Y, and that %Y contains at
-  // least 4 characters, with more only if necessary.
-  auto split_year_lower(long long year) const noexcept -> int {
-    auto l = year % 100;
-    if (l < 0) l = -l;  // l in [0, 99]
-    return static_cast<int>(l);
-  }
-
-  // Algorithm: https://en.wikipedia.org/wiki/ISO_week_date.
-  auto iso_year_weeks(long long curr_year) const noexcept -> int {
-    const auto prev_year = curr_year - 1;
-    const auto curr_p =
-        (curr_year + curr_year / 4 - curr_year / 100 + curr_year / 400) %
-        days_per_week;
-    const auto prev_p =
-        (prev_year + prev_year / 4 - prev_year / 100 + prev_year / 400) %
-        days_per_week;
-    return 52 + ((curr_p == 4 || prev_p == 3) ? 1 : 0);
-  }
-  auto iso_week_num(int tm_yday, int tm_wday) const noexcept -> int {
-    return (tm_yday + 11 - (tm_wday == 0 ? days_per_week : tm_wday)) /
-           days_per_week;
-  }
-  auto tm_iso_week_year() const noexcept -> long long {
-    const auto year = tm_year();
-    const auto w = iso_week_num(tm_yday(), tm_wday());
-    if (w < 1) return year - 1;
-    if (w > iso_year_weeks(year)) return year + 1;
-    return year;
-  }
-  auto tm_iso_week_of_year() const noexcept -> int {
-    const auto year = tm_year();
-    const auto w = iso_week_num(tm_yday(), tm_wday());
-    if (w < 1) return iso_year_weeks(year - 1);
-    if (w > iso_year_weeks(year)) return 1;
-    return w;
-  }
-
-  void write1(int value) {
-    *out_++ = static_cast<char>('0' + to_unsigned(value) % 10);
-  }
-  void write2(int value) {
-    const char* d = digits2(to_unsigned(value) % 100);
-    *out_++ = *d++;
-    *out_++ = *d;
-  }
-  void write2(int value, pad_type pad) {
-    unsigned int v = to_unsigned(value) % 100;
-    if (v >= 10) {
-      const char* d = digits2(v);
-      *out_++ = *d++;
-      *out_++ = *d;
-    } else {
-      out_ = detail::write_padding(out_, pad);
-      *out_++ = static_cast<char>('0' + v);
-    }
-  }
-
-  void write_year_extended(long long year) {
-    // At least 4 characters.
-    int width = 4;
-    if (year < 0) {
-      *out_++ = '-';
-      year = 0 - year;
-      --width;
-    }
-    uint32_or_64_or_128_t<long long> n = to_unsigned(year);
-    const int num_digits = count_digits(n);
-    if (width > num_digits) out_ = std::fill_n(out_, width - num_digits, '0');
-    out_ = format_decimal<Char>(out_, n, num_digits).end;
-  }
-  void write_year(long long year) {
-    if (year >= 0 && year < 10000) {
-      write2(static_cast<int>(year / 100));
-      write2(static_cast<int>(year % 100));
-    } else {
-      write_year_extended(year);
-    }
-  }
-
-  void write_utc_offset(long offset, numeric_system ns) {
-    if (offset < 0) {
-      *out_++ = '-';
-      offset = -offset;
-    } else {
-      *out_++ = '+';
-    }
-    offset /= 60;
-    write2(static_cast<int>(offset / 60));
-    if (ns != numeric_system::standard) *out_++ = ':';
-    write2(static_cast<int>(offset % 60));
-  }
-  template <typename T, FMT_ENABLE_IF(has_member_data_tm_gmtoff<T>::value)>
-  void format_utc_offset_impl(const T& tm, numeric_system ns) {
-    write_utc_offset(tm.tm_gmtoff, ns);
-  }
-  template <typename T, FMT_ENABLE_IF(!has_member_data_tm_gmtoff<T>::value)>
-  void format_utc_offset_impl(const T& tm, numeric_system ns) {
-#if defined(_WIN32) && defined(_UCRT)
-#  if FMT_USE_TZSET
-    tzset_once();
-#  endif
-    long offset = 0;
-    _get_timezone(&offset);
-    if (tm.tm_isdst) {
-      long dstbias = 0;
-      _get_dstbias(&dstbias);
-      offset += dstbias;
-    }
-    write_utc_offset(-offset, ns);
-#else
-    if (ns == numeric_system::standard) return format_localized('z');
-
-    // Extract timezone offset from timezone conversion functions.
-    std::tm gtm = tm;
-    std::time_t gt = std::mktime(&gtm);
-    std::tm ltm = gmtime(gt);
-    std::time_t lt = std::mktime(&ltm);
-    long offset = gt - lt;
-    write_utc_offset(offset, ns);
-#endif
-  }
-
-  template <typename T, FMT_ENABLE_IF(has_member_data_tm_zone<T>::value)>
-  void format_tz_name_impl(const T& tm) {
-    if (is_classic_)
-      out_ = write_tm_str<Char>(out_, tm.tm_zone, loc_);
-    else
-      format_localized('Z');
-  }
-  template <typename T, FMT_ENABLE_IF(!has_member_data_tm_zone<T>::value)>
-  void format_tz_name_impl(const T&) {
-    format_localized('Z');
-  }
-
-  void format_localized(char format, char modifier = 0) {
-    out_ = write<Char>(out_, tm_, loc_, format, modifier);
-  }
-
- public:
-  tm_writer(const std::locale& loc, OutputIt out, const std::tm& tm,
-            const Duration* subsecs = nullptr)
-      : loc_(loc),
-        is_classic_(loc_ == get_classic_locale()),
-        out_(out),
-        subsecs_(subsecs),
-        tm_(tm) {}
-
-  auto out() const -> OutputIt { return out_; }
-
-  FMT_CONSTEXPR void on_text(const Char* begin, const Char* end) {
-    out_ = copy_str<Char>(begin, end, out_);
-  }
-
-  void on_abbr_weekday() {
-    if (is_classic_)
-      out_ = write(out_, tm_wday_short_name(tm_wday()));
-    else
-      format_localized('a');
-  }
-  void on_full_weekday() {
-    if (is_classic_)
-      out_ = write(out_, tm_wday_full_name(tm_wday()));
-    else
-      format_localized('A');
-  }
-  void on_dec0_weekday(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) return write1(tm_wday());
-    format_localized('w', 'O');
-  }
-  void on_dec1_weekday(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) {
-      auto wday = tm_wday();
-      write1(wday == 0 ? days_per_week : wday);
-    } else {
-      format_localized('u', 'O');
-    }
-  }
-
-  void on_abbr_month() {
-    if (is_classic_)
-      out_ = write(out_, tm_mon_short_name(tm_mon()));
-    else
-      format_localized('b');
-  }
-  void on_full_month() {
-    if (is_classic_)
-      out_ = write(out_, tm_mon_full_name(tm_mon()));
-    else
-      format_localized('B');
-  }
-
-  void on_datetime(numeric_system ns) {
-    if (is_classic_) {
-      on_abbr_weekday();
-      *out_++ = ' ';
-      on_abbr_month();
-      *out_++ = ' ';
-      on_day_of_month_space(numeric_system::standard);
-      *out_++ = ' ';
-      on_iso_time();
-      *out_++ = ' ';
-      on_year(numeric_system::standard);
-    } else {
-      format_localized('c', ns == numeric_system::standard ? '\0' : 'E');
-    }
-  }
-  void on_loc_date(numeric_system ns) {
-    if (is_classic_)
-      on_us_date();
-    else
-      format_localized('x', ns == numeric_system::standard ? '\0' : 'E');
-  }
-  void on_loc_time(numeric_system ns) {
-    if (is_classic_)
-      on_iso_time();
-    else
-      format_localized('X', ns == numeric_system::standard ? '\0' : 'E');
-  }
-  void on_us_date() {
-    char buf[8];
-    write_digit2_separated(buf, to_unsigned(tm_mon() + 1),
-                           to_unsigned(tm_mday()),
-                           to_unsigned(split_year_lower(tm_year())), '/');
-    out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_);
-  }
-  void on_iso_date() {
-    auto year = tm_year();
-    char buf[10];
-    size_t offset = 0;
-    if (year >= 0 && year < 10000) {
-      copy2(buf, digits2(static_cast<size_t>(year / 100)));
-    } else {
-      offset = 4;
-      write_year_extended(year);
-      year = 0;
-    }
-    write_digit2_separated(buf + 2, static_cast<unsigned>(year % 100),
-                           to_unsigned(tm_mon() + 1), to_unsigned(tm_mday()),
-                           '-');
-    out_ = copy_str<Char>(std::begin(buf) + offset, std::end(buf), out_);
-  }
-
-  void on_utc_offset(numeric_system ns) { format_utc_offset_impl(tm_, ns); }
-  void on_tz_name() { format_tz_name_impl(tm_); }
-
-  void on_year(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write_year(tm_year());
-    format_localized('Y', 'E');
-  }
-  void on_short_year(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2(split_year_lower(tm_year()));
-    format_localized('y', 'O');
-  }
-  void on_offset_year() {
-    if (is_classic_) return write2(split_year_lower(tm_year()));
-    format_localized('y', 'E');
-  }
-
-  void on_century(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) {
-      auto year = tm_year();
-      auto upper = year / 100;
-      if (year >= -99 && year < 0) {
-        // Zero upper on negative year.
-        *out_++ = '-';
-        *out_++ = '0';
-      } else if (upper >= 0 && upper < 100) {
-        write2(static_cast<int>(upper));
-      } else {
-        out_ = write<Char>(out_, upper);
-      }
-    } else {
-      format_localized('C', 'E');
-    }
-  }
-
-  void on_dec_month(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2(tm_mon() + 1);
-    format_localized('m', 'O');
-  }
-
-  void on_dec0_week_of_year(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2((tm_yday() + days_per_week - tm_wday()) / days_per_week);
-    format_localized('U', 'O');
-  }
-  void on_dec1_week_of_year(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) {
-      auto wday = tm_wday();
-      write2((tm_yday() + days_per_week -
-              (wday == 0 ? (days_per_week - 1) : (wday - 1))) /
-             days_per_week);
-    } else {
-      format_localized('W', 'O');
-    }
-  }
-  void on_iso_week_of_year(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2(tm_iso_week_of_year());
-    format_localized('V', 'O');
-  }
-
-  void on_iso_week_based_year() { write_year(tm_iso_week_year()); }
-  void on_iso_week_based_short_year() {
-    write2(split_year_lower(tm_iso_week_year()));
-  }
-
-  void on_day_of_year() {
-    auto yday = tm_yday() + 1;
-    write1(yday / 100);
-    write2(yday % 100);
-  }
-  void on_day_of_month(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) return write2(tm_mday());
-    format_localized('d', 'O');
-  }
-  void on_day_of_month_space(numeric_system ns) {
-    if (is_classic_ || ns == numeric_system::standard) {
-      auto mday = to_unsigned(tm_mday()) % 100;
-      const char* d2 = digits2(mday);
-      *out_++ = mday < 10 ? ' ' : d2[0];
-      *out_++ = d2[1];
-    } else {
-      format_localized('e', 'O');
-    }
-  }
-
-  void on_24_hour(numeric_system ns, pad_type pad) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2(tm_hour(), pad);
-    format_localized('H', 'O');
-  }
-  void on_12_hour(numeric_system ns, pad_type pad) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2(tm_hour12(), pad);
-    format_localized('I', 'O');
-  }
-  void on_minute(numeric_system ns, pad_type pad) {
-    if (is_classic_ || ns == numeric_system::standard)
-      return write2(tm_min(), pad);
-    format_localized('M', 'O');
-  }
-
-  void on_second(numeric_system ns, pad_type pad) {
-    if (is_classic_ || ns == numeric_system::standard) {
-      write2(tm_sec(), pad);
-      if (subsecs_) {
-        if (std::is_floating_point<typename Duration::rep>::value) {
-          auto buf = memory_buffer();
-          write_floating_seconds(buf, *subsecs_);
-          if (buf.size() > 1) {
-            // Remove the leading "0", write something like ".123".
-            out_ = std::copy(buf.begin() + 1, buf.end(), out_);
-          }
-        } else {
-          write_fractional_seconds<Char>(out_, *subsecs_);
-        }
-      }
-    } else {
-      // Currently no formatting of subseconds when a locale is set.
-      format_localized('S', 'O');
-    }
-  }
-
-  void on_12_hour_time() {
-    if (is_classic_) {
-      char buf[8];
-      write_digit2_separated(buf, to_unsigned(tm_hour12()),
-                             to_unsigned(tm_min()), to_unsigned(tm_sec()), ':');
-      out_ = copy_str<Char>(std::begin(buf), std::end(buf), out_);
-      *out_++ = ' ';
-      on_am_pm();
-    } else {
-      format_localized('r');
-    }
-  }
-  void on_24_hour_time() {
-    write2(tm_hour());
-    *out_++ = ':';
-    write2(tm_min());
-  }
-  void on_iso_time() {
-    on_24_hour_time();
-    *out_++ = ':';
-    on_second(numeric_system::standard, pad_type::unspecified);
-  }
-
-  void on_am_pm() {
-    if (is_classic_) {
-      *out_++ = tm_hour() < 12 ? 'A' : 'P';
-      *out_++ = 'M';
-    } else {
-      format_localized('p');
-    }
-  }
-
-  // These apply to chrono durations but not tm.
-  void on_duration_value() {}
-  void on_duration_unit() {}
-};
-
-struct chrono_format_checker : null_chrono_spec_handler<chrono_format_checker> {
-  bool has_precision_integral = false;
-
-  FMT_NORETURN void unsupported() { FMT_THROW(format_error("no date")); }
-
-  template <typename Char>
-  FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
-  FMT_CONSTEXPR void on_day_of_year() {}
-  FMT_CONSTEXPR void on_24_hour(numeric_system, pad_type) {}
-  FMT_CONSTEXPR void on_12_hour(numeric_system, pad_type) {}
-  FMT_CONSTEXPR void on_minute(numeric_system, pad_type) {}
-  FMT_CONSTEXPR void on_second(numeric_system, pad_type) {}
-  FMT_CONSTEXPR void on_12_hour_time() {}
-  FMT_CONSTEXPR void on_24_hour_time() {}
-  FMT_CONSTEXPR void on_iso_time() {}
-  FMT_CONSTEXPR void on_am_pm() {}
-  FMT_CONSTEXPR void on_duration_value() const {
-    if (has_precision_integral) {
-      FMT_THROW(format_error("precision not allowed for this argument type"));
-    }
-  }
-  FMT_CONSTEXPR void on_duration_unit() {}
-};
-
-template <typename T,
-          FMT_ENABLE_IF(std::is_integral<T>::value&& has_isfinite<T>::value)>
-inline auto isfinite(T) -> bool {
-  return true;
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-inline auto mod(T x, int y) -> T {
-  return x % static_cast<T>(y);
-}
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-inline auto mod(T x, int y) -> T {
-  return std::fmod(x, static_cast<T>(y));
-}
-
-// If T is an integral type, maps T to its unsigned counterpart, otherwise
-// leaves it unchanged (unlike std::make_unsigned).
-template <typename T, bool INTEGRAL = std::is_integral<T>::value>
-struct make_unsigned_or_unchanged {
-  using type = T;
-};
-
-template <typename T> struct make_unsigned_or_unchanged<T, true> {
-  using type = typename std::make_unsigned<T>::type;
-};
-
-template <typename Rep, typename Period,
-          FMT_ENABLE_IF(std::is_integral<Rep>::value)>
-inline auto get_milliseconds(std::chrono::duration<Rep, Period> d)
-    -> std::chrono::duration<Rep, std::milli> {
-  // this may overflow and/or the result may not fit in the
-  // target type.
-#if FMT_SAFE_DURATION_CAST
-  using CommonSecondsType =
-      typename std::common_type<decltype(d), std::chrono::seconds>::type;
-  const auto d_as_common = fmt_duration_cast<CommonSecondsType>(d);
-  const auto d_as_whole_seconds =
-      fmt_duration_cast<std::chrono::seconds>(d_as_common);
-  // this conversion should be nonproblematic
-  const auto diff = d_as_common - d_as_whole_seconds;
-  const auto ms =
-      fmt_duration_cast<std::chrono::duration<Rep, std::milli>>(diff);
-  return ms;
-#else
-  auto s = fmt_duration_cast<std::chrono::seconds>(d);
-  return fmt_duration_cast<std::chrono::milliseconds>(d - s);
-#endif
-}
-
-template <typename Char, typename Rep, typename OutputIt,
-          FMT_ENABLE_IF(std::is_integral<Rep>::value)>
-auto format_duration_value(OutputIt out, Rep val, int) -> OutputIt {
-  return write<Char>(out, val);
-}
-
-template <typename Char, typename Rep, typename OutputIt,
-          FMT_ENABLE_IF(std::is_floating_point<Rep>::value)>
-auto format_duration_value(OutputIt out, Rep val, int precision) -> OutputIt {
-  auto specs = format_specs<Char>();
-  specs.precision = precision;
-  specs.type = precision >= 0 ? presentation_type::fixed_lower
-                              : presentation_type::general_lower;
-  return write<Char>(out, val, specs);
-}
-
-template <typename Char, typename OutputIt>
-auto copy_unit(string_view unit, OutputIt out, Char) -> OutputIt {
-  return std::copy(unit.begin(), unit.end(), out);
-}
-
-template <typename OutputIt>
-auto copy_unit(string_view unit, OutputIt out, wchar_t) -> OutputIt {
-  // This works when wchar_t is UTF-32 because units only contain characters
-  // that have the same representation in UTF-16 and UTF-32.
-  utf8_to_utf16 u(unit);
-  return std::copy(u.c_str(), u.c_str() + u.size(), out);
-}
-
-template <typename Char, typename Period, typename OutputIt>
-auto format_duration_unit(OutputIt out) -> OutputIt {
-  if (const char* unit = get_units<Period>())
-    return copy_unit(string_view(unit), out, Char());
-  *out++ = '[';
-  out = write<Char>(out, Period::num);
-  if (const_check(Period::den != 1)) {
-    *out++ = '/';
-    out = write<Char>(out, Period::den);
-  }
-  *out++ = ']';
-  *out++ = 's';
-  return out;
-}
-
-class get_locale {
- private:
-  union {
-    std::locale locale_;
-  };
-  bool has_locale_ = false;
-
- public:
-  get_locale(bool localized, locale_ref loc) : has_locale_(localized) {
-    if (localized)
-      ::new (&locale_) std::locale(loc.template get<std::locale>());
-  }
-  ~get_locale() {
-    if (has_locale_) locale_.~locale();
-  }
-  operator const std::locale&() const {
-    return has_locale_ ? locale_ : get_classic_locale();
-  }
-};
-
-template <typename FormatContext, typename OutputIt, typename Rep,
-          typename Period>
-struct chrono_formatter {
-  FormatContext& context;
-  OutputIt out;
-  int precision;
-  bool localized = false;
-  // rep is unsigned to avoid overflow.
-  using rep =
-      conditional_t<std::is_integral<Rep>::value && sizeof(Rep) < sizeof(int),
-                    unsigned, typename make_unsigned_or_unchanged<Rep>::type>;
-  rep val;
-  using seconds = std::chrono::duration<rep>;
-  seconds s;
-  using milliseconds = std::chrono::duration<rep, std::milli>;
-  bool negative;
-
-  using char_type = typename FormatContext::char_type;
-  using tm_writer_type = tm_writer<OutputIt, char_type>;
-
-  chrono_formatter(FormatContext& ctx, OutputIt o,
-                   std::chrono::duration<Rep, Period> d)
-      : context(ctx),
-        out(o),
-        val(static_cast<rep>(d.count())),
-        negative(false) {
-    if (d.count() < 0) {
-      val = 0 - val;
-      negative = true;
-    }
-
-    // this may overflow and/or the result may not fit in the
-    // target type.
-    // might need checked conversion (rep!=Rep)
-    s = fmt_duration_cast<seconds>(std::chrono::duration<rep, Period>(val));
-  }
-
-  // returns true if nan or inf, writes to out.
-  auto handle_nan_inf() -> bool {
-    if (isfinite(val)) {
-      return false;
-    }
-    if (isnan(val)) {
-      write_nan();
-      return true;
-    }
-    // must be +-inf
-    if (val > 0) {
-      write_pinf();
-    } else {
-      write_ninf();
-    }
-    return true;
-  }
-
-  auto days() const -> Rep { return static_cast<Rep>(s.count() / 86400); }
-  auto hour() const -> Rep {
-    return static_cast<Rep>(mod((s.count() / 3600), 24));
-  }
-
-  auto hour12() const -> Rep {
-    Rep hour = static_cast<Rep>(mod((s.count() / 3600), 12));
-    return hour <= 0 ? 12 : hour;
-  }
-
-  auto minute() const -> Rep {
-    return static_cast<Rep>(mod((s.count() / 60), 60));
-  }
-  auto second() const -> Rep { return static_cast<Rep>(mod(s.count(), 60)); }
-
-  auto time() const -> std::tm {
-    auto time = std::tm();
-    time.tm_hour = to_nonnegative_int(hour(), 24);
-    time.tm_min = to_nonnegative_int(minute(), 60);
-    time.tm_sec = to_nonnegative_int(second(), 60);
-    return time;
-  }
-
-  void write_sign() {
-    if (negative) {
-      *out++ = '-';
-      negative = false;
-    }
-  }
-
-  void write(Rep value, int width, pad_type pad = pad_type::unspecified) {
-    write_sign();
-    if (isnan(value)) return write_nan();
-    uint32_or_64_or_128_t<int> n =
-        to_unsigned(to_nonnegative_int(value, max_value<int>()));
-    int num_digits = detail::count_digits(n);
-    if (width > num_digits) {
-      out = detail::write_padding(out, pad, width - num_digits);
-    }
-    out = format_decimal<char_type>(out, n, num_digits).end;
-  }
-
-  void write_nan() { std::copy_n("nan", 3, out); }
-  void write_pinf() { std::copy_n("inf", 3, out); }
-  void write_ninf() { std::copy_n("-inf", 4, out); }
-
-  template <typename Callback, typename... Args>
-  void format_tm(const tm& time, Callback cb, Args... args) {
-    if (isnan(val)) return write_nan();
-    get_locale loc(localized, context.locale());
-    auto w = tm_writer_type(loc, out, time);
-    (w.*cb)(args...);
-    out = w.out();
-  }
-
-  void on_text(const char_type* begin, const char_type* end) {
-    std::copy(begin, end, out);
-  }
-
-  // These are not implemented because durations don't have date information.
-  void on_abbr_weekday() {}
-  void on_full_weekday() {}
-  void on_dec0_weekday(numeric_system) {}
-  void on_dec1_weekday(numeric_system) {}
-  void on_abbr_month() {}
-  void on_full_month() {}
-  void on_datetime(numeric_system) {}
-  void on_loc_date(numeric_system) {}
-  void on_loc_time(numeric_system) {}
-  void on_us_date() {}
-  void on_iso_date() {}
-  void on_utc_offset(numeric_system) {}
-  void on_tz_name() {}
-  void on_year(numeric_system) {}
-  void on_short_year(numeric_system) {}
-  void on_offset_year() {}
-  void on_century(numeric_system) {}
-  void on_iso_week_based_year() {}
-  void on_iso_week_based_short_year() {}
-  void on_dec_month(numeric_system) {}
-  void on_dec0_week_of_year(numeric_system) {}
-  void on_dec1_week_of_year(numeric_system) {}
-  void on_iso_week_of_year(numeric_system) {}
-  void on_day_of_month(numeric_system) {}
-  void on_day_of_month_space(numeric_system) {}
-
-  void on_day_of_year() {
-    if (handle_nan_inf()) return;
-    write(days(), 0);
-  }
-
-  void on_24_hour(numeric_system ns, pad_type pad) {
-    if (handle_nan_inf()) return;
-
-    if (ns == numeric_system::standard) return write(hour(), 2, pad);
-    auto time = tm();
-    time.tm_hour = to_nonnegative_int(hour(), 24);
-    format_tm(time, &tm_writer_type::on_24_hour, ns, pad);
-  }
-
-  void on_12_hour(numeric_system ns, pad_type pad) {
-    if (handle_nan_inf()) return;
-
-    if (ns == numeric_system::standard) return write(hour12(), 2, pad);
-    auto time = tm();
-    time.tm_hour = to_nonnegative_int(hour12(), 12);
-    format_tm(time, &tm_writer_type::on_12_hour, ns, pad);
-  }
-
-  void on_minute(numeric_system ns, pad_type pad) {
-    if (handle_nan_inf()) return;
-
-    if (ns == numeric_system::standard) return write(minute(), 2, pad);
-    auto time = tm();
-    time.tm_min = to_nonnegative_int(minute(), 60);
-    format_tm(time, &tm_writer_type::on_minute, ns, pad);
-  }
-
-  void on_second(numeric_system ns, pad_type pad) {
-    if (handle_nan_inf()) return;
-
-    if (ns == numeric_system::standard) {
-      if (std::is_floating_point<rep>::value) {
-        auto buf = memory_buffer();
-        write_floating_seconds(buf, std::chrono::duration<rep, Period>(val),
-                               precision);
-        if (negative) *out++ = '-';
-        if (buf.size() < 2 || buf[1] == '.') {
-          out = detail::write_padding(out, pad);
-        }
-        out = std::copy(buf.begin(), buf.end(), out);
-      } else {
-        write(second(), 2, pad);
-        write_fractional_seconds<char_type>(
-            out, std::chrono::duration<rep, Period>(val), precision);
-      }
-      return;
-    }
-    auto time = tm();
-    time.tm_sec = to_nonnegative_int(second(), 60);
-    format_tm(time, &tm_writer_type::on_second, ns, pad);
-  }
-
-  void on_12_hour_time() {
-    if (handle_nan_inf()) return;
-    format_tm(time(), &tm_writer_type::on_12_hour_time);
-  }
-
-  void on_24_hour_time() {
-    if (handle_nan_inf()) {
-      *out++ = ':';
-      handle_nan_inf();
-      return;
-    }
-
-    write(hour(), 2);
-    *out++ = ':';
-    write(minute(), 2);
-  }
-
-  void on_iso_time() {
-    on_24_hour_time();
-    *out++ = ':';
-    if (handle_nan_inf()) return;
-    on_second(numeric_system::standard, pad_type::unspecified);
-  }
-
-  void on_am_pm() {
-    if (handle_nan_inf()) return;
-    format_tm(time(), &tm_writer_type::on_am_pm);
-  }
-
-  void on_duration_value() {
-    if (handle_nan_inf()) return;
-    write_sign();
-    out = format_duration_value<char_type>(out, val, precision);
-  }
-
-  void on_duration_unit() {
-    out = format_duration_unit<char_type, Period>(out);
-  }
-};
-
-}  // namespace detail
-
-#if defined(__cpp_lib_chrono) && __cpp_lib_chrono >= 201907
-using weekday = std::chrono::weekday;
-#else
-// A fallback version of weekday.
-class weekday {
- private:
-  unsigned char value;
-
- public:
-  weekday() = default;
-  explicit constexpr weekday(unsigned wd) noexcept
-      : value(static_cast<unsigned char>(wd != 7 ? wd : 0)) {}
-  constexpr auto c_encoding() const noexcept -> unsigned { return value; }
-};
-
-class year_month_day {};
-#endif
-
-// A rudimentary weekday formatter.
-template <typename Char> struct formatter<weekday, Char> {
- private:
-  bool localized = false;
-
- public:
-  FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
-      -> decltype(ctx.begin()) {
-    auto begin = ctx.begin(), end = ctx.end();
-    if (begin != end && *begin == 'L') {
-      ++begin;
-      localized = true;
-    }
-    return begin;
-  }
-
-  template <typename FormatContext>
-  auto format(weekday wd, FormatContext& ctx) const -> decltype(ctx.out()) {
-    auto time = std::tm();
-    time.tm_wday = static_cast<int>(wd.c_encoding());
-    detail::get_locale loc(localized, ctx.locale());
-    auto w = detail::tm_writer<decltype(ctx.out()), Char>(loc, ctx.out(), time);
-    w.on_abbr_weekday();
-    return w.out();
-  }
-};
-
-template <typename Rep, typename Period, typename Char>
-struct formatter<std::chrono::duration<Rep, Period>, Char> {
- private:
-  format_specs<Char> specs_;
-  detail::arg_ref<Char> width_ref_;
-  detail::arg_ref<Char> precision_ref_;
-  bool localized_ = false;
-  basic_string_view<Char> format_str_;
-
- public:
-  FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
-      -> decltype(ctx.begin()) {
-    auto it = ctx.begin(), end = ctx.end();
-    if (it == end || *it == '}') return it;
-
-    it = detail::parse_align(it, end, specs_);
-    if (it == end) return it;
-
-    it = detail::parse_dynamic_spec(it, end, specs_.width, width_ref_, ctx);
-    if (it == end) return it;
-
-    auto checker = detail::chrono_format_checker();
-    if (*it == '.') {
-      checker.has_precision_integral = !std::is_floating_point<Rep>::value;
-      it = detail::parse_precision(it, end, specs_.precision, precision_ref_,
-                                   ctx);
-    }
-    if (it != end && *it == 'L') {
-      localized_ = true;
-      ++it;
-    }
-    end = detail::parse_chrono_format(it, end, checker);
-    format_str_ = {it, detail::to_unsigned(end - it)};
-    return end;
-  }
-
-  template <typename FormatContext>
-  auto format(std::chrono::duration<Rep, Period> d, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    auto specs = specs_;
-    auto precision = specs.precision;
-    specs.precision = -1;
-    auto begin = format_str_.begin(), end = format_str_.end();
-    // As a possible future optimization, we could avoid extra copying if width
-    // is not specified.
-    auto buf = basic_memory_buffer<Char>();
-    auto out = std::back_inserter(buf);
-    detail::handle_dynamic_spec<detail::width_checker>(specs.width, width_ref_,
-                                                       ctx);
-    detail::handle_dynamic_spec<detail::precision_checker>(precision,
-                                                           precision_ref_, ctx);
-    if (begin == end || *begin == '}') {
-      out = detail::format_duration_value<Char>(out, d.count(), precision);
-      detail::format_duration_unit<Char, Period>(out);
-    } else {
-      using chrono_formatter =
-          detail::chrono_formatter<FormatContext, decltype(out), Rep, Period>;
-      auto f = chrono_formatter(ctx, out, d);
-      f.precision = precision;
-      f.localized = localized_;
-      detail::parse_chrono_format(begin, end, f);
-    }
-    return detail::write(
-        ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs);
-  }
-};
-
-template <typename Char, typename Duration>
-struct formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
-                 Char> : formatter<std::tm, Char> {
-  FMT_CONSTEXPR formatter() {
-    this->format_str_ = detail::string_literal<Char, '%', 'F', ' ', '%', 'T'>{};
-  }
-
-  template <typename FormatContext>
-  auto format(std::chrono::time_point<std::chrono::system_clock, Duration> val,
-              FormatContext& ctx) const -> decltype(ctx.out()) {
-    using period = typename Duration::period;
-    if (detail::const_check(
-            period::num != 1 || period::den != 1 ||
-            std::is_floating_point<typename Duration::rep>::value)) {
-      const auto epoch = val.time_since_epoch();
-      auto subsecs = detail::fmt_duration_cast<Duration>(
-          epoch - detail::fmt_duration_cast<std::chrono::seconds>(epoch));
-
-      if (subsecs.count() < 0) {
-        auto second =
-            detail::fmt_duration_cast<Duration>(std::chrono::seconds(1));
-        if (epoch.count() < ((Duration::min)() + second).count())
-          FMT_THROW(format_error("duration is too small"));
-        subsecs += second;
-        val -= second;
-      }
-
-      return formatter<std::tm, Char>::do_format(gmtime(val), ctx, &subsecs);
-    }
-
-    return formatter<std::tm, Char>::format(gmtime(val), ctx);
-  }
-};
-
-#if FMT_USE_LOCAL_TIME
-template <typename Char, typename Duration>
-struct formatter<std::chrono::local_time<Duration>, Char>
-    : formatter<std::tm, Char> {
-  FMT_CONSTEXPR formatter() {
-    this->format_str_ = detail::string_literal<Char, '%', 'F', ' ', '%', 'T'>{};
-  }
-
-  template <typename FormatContext>
-  auto format(std::chrono::local_time<Duration> val, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    using period = typename Duration::period;
-    if (period::num != 1 || period::den != 1 ||
-        std::is_floating_point<typename Duration::rep>::value) {
-      const auto epoch = val.time_since_epoch();
-      const auto subsecs = detail::fmt_duration_cast<Duration>(
-          epoch - detail::fmt_duration_cast<std::chrono::seconds>(epoch));
-
-      return formatter<std::tm, Char>::do_format(localtime(val), ctx, &subsecs);
-    }
-
-    return formatter<std::tm, Char>::format(localtime(val), ctx);
-  }
-};
-#endif
-
-#if FMT_USE_UTC_TIME
-template <typename Char, typename Duration>
-struct formatter<std::chrono::time_point<std::chrono::utc_clock, Duration>,
-                 Char>
-    : formatter<std::chrono::time_point<std::chrono::system_clock, Duration>,
-                Char> {
-  template <typename FormatContext>
-  auto format(std::chrono::time_point<std::chrono::utc_clock, Duration> val,
-              FormatContext& ctx) const -> decltype(ctx.out()) {
-    return formatter<
-        std::chrono::time_point<std::chrono::system_clock, Duration>,
-        Char>::format(std::chrono::utc_clock::to_sys(val), ctx);
-  }
-};
-#endif
-
-template <typename Char> struct formatter<std::tm, Char> {
- private:
-  format_specs<Char> specs_;
-  detail::arg_ref<Char> width_ref_;
-
- protected:
-  basic_string_view<Char> format_str_;
-
-  template <typename FormatContext, typename Duration>
-  auto do_format(const std::tm& tm, FormatContext& ctx,
-                 const Duration* subsecs) const -> decltype(ctx.out()) {
-    auto specs = specs_;
-    auto buf = basic_memory_buffer<Char>();
-    auto out = std::back_inserter(buf);
-    detail::handle_dynamic_spec<detail::width_checker>(specs.width, width_ref_,
-                                                       ctx);
-
-    auto loc_ref = ctx.locale();
-    detail::get_locale loc(static_cast<bool>(loc_ref), loc_ref);
-    auto w =
-        detail::tm_writer<decltype(out), Char, Duration>(loc, out, tm, subsecs);
-    detail::parse_chrono_format(format_str_.begin(), format_str_.end(), w);
-    return detail::write(
-        ctx.out(), basic_string_view<Char>(buf.data(), buf.size()), specs);
-  }
-
- public:
-  FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
-      -> decltype(ctx.begin()) {
-    auto it = ctx.begin(), end = ctx.end();
-    if (it == end || *it == '}') return it;
-
-    it = detail::parse_align(it, end, specs_);
-    if (it == end) return it;
-
-    it = detail::parse_dynamic_spec(it, end, specs_.width, width_ref_, ctx);
-    if (it == end) return it;
-
-    end = detail::parse_chrono_format(it, end, detail::tm_format_checker());
-    // Replace the default format_str only if the new spec is not empty.
-    if (end != it) format_str_ = {it, detail::to_unsigned(end - it)};
-    return end;
-  }
-
-  template <typename FormatContext>
-  auto format(const std::tm& tm, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    return do_format<FormatContext, std::chrono::seconds>(tm, ctx, nullptr);
-  }
-};
-
-FMT_END_EXPORT
-FMT_END_NAMESPACE
-
-#endif  // FMT_CHRONO_H_
diff --git a/3party/fmt/include/fmt/color.h b/3party/fmt/include/fmt/color.h
deleted file mode 100644
index 367849a..0000000
--- a/3party/fmt/include/fmt/color.h
+++ /dev/null
@@ -1,643 +0,0 @@
-// Formatting library for C++ - color support
-//
-// Copyright (c) 2018 - present, Victor Zverovich and fmt contributors
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_COLOR_H_
-#define FMT_COLOR_H_
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-FMT_BEGIN_EXPORT
-
-enum class color : uint32_t {
-  alice_blue = 0xF0F8FF,               // rgb(240,248,255)
-  antique_white = 0xFAEBD7,            // rgb(250,235,215)
-  aqua = 0x00FFFF,                     // rgb(0,255,255)
-  aquamarine = 0x7FFFD4,               // rgb(127,255,212)
-  azure = 0xF0FFFF,                    // rgb(240,255,255)
-  beige = 0xF5F5DC,                    // rgb(245,245,220)
-  bisque = 0xFFE4C4,                   // rgb(255,228,196)
-  black = 0x000000,                    // rgb(0,0,0)
-  blanched_almond = 0xFFEBCD,          // rgb(255,235,205)
-  blue = 0x0000FF,                     // rgb(0,0,255)
-  blue_violet = 0x8A2BE2,              // rgb(138,43,226)
-  brown = 0xA52A2A,                    // rgb(165,42,42)
-  burly_wood = 0xDEB887,               // rgb(222,184,135)
-  cadet_blue = 0x5F9EA0,               // rgb(95,158,160)
-  chartreuse = 0x7FFF00,               // rgb(127,255,0)
-  chocolate = 0xD2691E,                // rgb(210,105,30)
-  coral = 0xFF7F50,                    // rgb(255,127,80)
-  cornflower_blue = 0x6495ED,          // rgb(100,149,237)
-  cornsilk = 0xFFF8DC,                 // rgb(255,248,220)
-  crimson = 0xDC143C,                  // rgb(220,20,60)
-  cyan = 0x00FFFF,                     // rgb(0,255,255)
-  dark_blue = 0x00008B,                // rgb(0,0,139)
-  dark_cyan = 0x008B8B,                // rgb(0,139,139)
-  dark_golden_rod = 0xB8860B,          // rgb(184,134,11)
-  dark_gray = 0xA9A9A9,                // rgb(169,169,169)
-  dark_green = 0x006400,               // rgb(0,100,0)
-  dark_khaki = 0xBDB76B,               // rgb(189,183,107)
-  dark_magenta = 0x8B008B,             // rgb(139,0,139)
-  dark_olive_green = 0x556B2F,         // rgb(85,107,47)
-  dark_orange = 0xFF8C00,              // rgb(255,140,0)
-  dark_orchid = 0x9932CC,              // rgb(153,50,204)
-  dark_red = 0x8B0000,                 // rgb(139,0,0)
-  dark_salmon = 0xE9967A,              // rgb(233,150,122)
-  dark_sea_green = 0x8FBC8F,           // rgb(143,188,143)
-  dark_slate_blue = 0x483D8B,          // rgb(72,61,139)
-  dark_slate_gray = 0x2F4F4F,          // rgb(47,79,79)
-  dark_turquoise = 0x00CED1,           // rgb(0,206,209)
-  dark_violet = 0x9400D3,              // rgb(148,0,211)
-  deep_pink = 0xFF1493,                // rgb(255,20,147)
-  deep_sky_blue = 0x00BFFF,            // rgb(0,191,255)
-  dim_gray = 0x696969,                 // rgb(105,105,105)
-  dodger_blue = 0x1E90FF,              // rgb(30,144,255)
-  fire_brick = 0xB22222,               // rgb(178,34,34)
-  floral_white = 0xFFFAF0,             // rgb(255,250,240)
-  forest_green = 0x228B22,             // rgb(34,139,34)
-  fuchsia = 0xFF00FF,                  // rgb(255,0,255)
-  gainsboro = 0xDCDCDC,                // rgb(220,220,220)
-  ghost_white = 0xF8F8FF,              // rgb(248,248,255)
-  gold = 0xFFD700,                     // rgb(255,215,0)
-  golden_rod = 0xDAA520,               // rgb(218,165,32)
-  gray = 0x808080,                     // rgb(128,128,128)
-  green = 0x008000,                    // rgb(0,128,0)
-  green_yellow = 0xADFF2F,             // rgb(173,255,47)
-  honey_dew = 0xF0FFF0,                // rgb(240,255,240)
-  hot_pink = 0xFF69B4,                 // rgb(255,105,180)
-  indian_red = 0xCD5C5C,               // rgb(205,92,92)
-  indigo = 0x4B0082,                   // rgb(75,0,130)
-  ivory = 0xFFFFF0,                    // rgb(255,255,240)
-  khaki = 0xF0E68C,                    // rgb(240,230,140)
-  lavender = 0xE6E6FA,                 // rgb(230,230,250)
-  lavender_blush = 0xFFF0F5,           // rgb(255,240,245)
-  lawn_green = 0x7CFC00,               // rgb(124,252,0)
-  lemon_chiffon = 0xFFFACD,            // rgb(255,250,205)
-  light_blue = 0xADD8E6,               // rgb(173,216,230)
-  light_coral = 0xF08080,              // rgb(240,128,128)
-  light_cyan = 0xE0FFFF,               // rgb(224,255,255)
-  light_golden_rod_yellow = 0xFAFAD2,  // rgb(250,250,210)
-  light_gray = 0xD3D3D3,               // rgb(211,211,211)
-  light_green = 0x90EE90,              // rgb(144,238,144)
-  light_pink = 0xFFB6C1,               // rgb(255,182,193)
-  light_salmon = 0xFFA07A,             // rgb(255,160,122)
-  light_sea_green = 0x20B2AA,          // rgb(32,178,170)
-  light_sky_blue = 0x87CEFA,           // rgb(135,206,250)
-  light_slate_gray = 0x778899,         // rgb(119,136,153)
-  light_steel_blue = 0xB0C4DE,         // rgb(176,196,222)
-  light_yellow = 0xFFFFE0,             // rgb(255,255,224)
-  lime = 0x00FF00,                     // rgb(0,255,0)
-  lime_green = 0x32CD32,               // rgb(50,205,50)
-  linen = 0xFAF0E6,                    // rgb(250,240,230)
-  magenta = 0xFF00FF,                  // rgb(255,0,255)
-  maroon = 0x800000,                   // rgb(128,0,0)
-  medium_aquamarine = 0x66CDAA,        // rgb(102,205,170)
-  medium_blue = 0x0000CD,              // rgb(0,0,205)
-  medium_orchid = 0xBA55D3,            // rgb(186,85,211)
-  medium_purple = 0x9370DB,            // rgb(147,112,219)
-  medium_sea_green = 0x3CB371,         // rgb(60,179,113)
-  medium_slate_blue = 0x7B68EE,        // rgb(123,104,238)
-  medium_spring_green = 0x00FA9A,      // rgb(0,250,154)
-  medium_turquoise = 0x48D1CC,         // rgb(72,209,204)
-  medium_violet_red = 0xC71585,        // rgb(199,21,133)
-  midnight_blue = 0x191970,            // rgb(25,25,112)
-  mint_cream = 0xF5FFFA,               // rgb(245,255,250)
-  misty_rose = 0xFFE4E1,               // rgb(255,228,225)
-  moccasin = 0xFFE4B5,                 // rgb(255,228,181)
-  navajo_white = 0xFFDEAD,             // rgb(255,222,173)
-  navy = 0x000080,                     // rgb(0,0,128)
-  old_lace = 0xFDF5E6,                 // rgb(253,245,230)
-  olive = 0x808000,                    // rgb(128,128,0)
-  olive_drab = 0x6B8E23,               // rgb(107,142,35)
-  orange = 0xFFA500,                   // rgb(255,165,0)
-  orange_red = 0xFF4500,               // rgb(255,69,0)
-  orchid = 0xDA70D6,                   // rgb(218,112,214)
-  pale_golden_rod = 0xEEE8AA,          // rgb(238,232,170)
-  pale_green = 0x98FB98,               // rgb(152,251,152)
-  pale_turquoise = 0xAFEEEE,           // rgb(175,238,238)
-  pale_violet_red = 0xDB7093,          // rgb(219,112,147)
-  papaya_whip = 0xFFEFD5,              // rgb(255,239,213)
-  peach_puff = 0xFFDAB9,               // rgb(255,218,185)
-  peru = 0xCD853F,                     // rgb(205,133,63)
-  pink = 0xFFC0CB,                     // rgb(255,192,203)
-  plum = 0xDDA0DD,                     // rgb(221,160,221)
-  powder_blue = 0xB0E0E6,              // rgb(176,224,230)
-  purple = 0x800080,                   // rgb(128,0,128)
-  rebecca_purple = 0x663399,           // rgb(102,51,153)
-  red = 0xFF0000,                      // rgb(255,0,0)
-  rosy_brown = 0xBC8F8F,               // rgb(188,143,143)
-  royal_blue = 0x4169E1,               // rgb(65,105,225)
-  saddle_brown = 0x8B4513,             // rgb(139,69,19)
-  salmon = 0xFA8072,                   // rgb(250,128,114)
-  sandy_brown = 0xF4A460,              // rgb(244,164,96)
-  sea_green = 0x2E8B57,                // rgb(46,139,87)
-  sea_shell = 0xFFF5EE,                // rgb(255,245,238)
-  sienna = 0xA0522D,                   // rgb(160,82,45)
-  silver = 0xC0C0C0,                   // rgb(192,192,192)
-  sky_blue = 0x87CEEB,                 // rgb(135,206,235)
-  slate_blue = 0x6A5ACD,               // rgb(106,90,205)
-  slate_gray = 0x708090,               // rgb(112,128,144)
-  snow = 0xFFFAFA,                     // rgb(255,250,250)
-  spring_green = 0x00FF7F,             // rgb(0,255,127)
-  steel_blue = 0x4682B4,               // rgb(70,130,180)
-  tan = 0xD2B48C,                      // rgb(210,180,140)
-  teal = 0x008080,                     // rgb(0,128,128)
-  thistle = 0xD8BFD8,                  // rgb(216,191,216)
-  tomato = 0xFF6347,                   // rgb(255,99,71)
-  turquoise = 0x40E0D0,                // rgb(64,224,208)
-  violet = 0xEE82EE,                   // rgb(238,130,238)
-  wheat = 0xF5DEB3,                    // rgb(245,222,179)
-  white = 0xFFFFFF,                    // rgb(255,255,255)
-  white_smoke = 0xF5F5F5,              // rgb(245,245,245)
-  yellow = 0xFFFF00,                   // rgb(255,255,0)
-  yellow_green = 0x9ACD32              // rgb(154,205,50)
-};                                     // enum class color
-
-enum class terminal_color : uint8_t {
-  black = 30,
-  red,
-  green,
-  yellow,
-  blue,
-  magenta,
-  cyan,
-  white,
-  bright_black = 90,
-  bright_red,
-  bright_green,
-  bright_yellow,
-  bright_blue,
-  bright_magenta,
-  bright_cyan,
-  bright_white
-};
-
-enum class emphasis : uint8_t {
-  bold = 1,
-  faint = 1 << 1,
-  italic = 1 << 2,
-  underline = 1 << 3,
-  blink = 1 << 4,
-  reverse = 1 << 5,
-  conceal = 1 << 6,
-  strikethrough = 1 << 7,
-};
-
-// rgb is a struct for red, green and blue colors.
-// Using the name "rgb" makes some editors show the color in a tooltip.
-struct rgb {
-  FMT_CONSTEXPR rgb() : r(0), g(0), b(0) {}
-  FMT_CONSTEXPR rgb(uint8_t r_, uint8_t g_, uint8_t b_) : r(r_), g(g_), b(b_) {}
-  FMT_CONSTEXPR rgb(uint32_t hex)
-      : r((hex >> 16) & 0xFF), g((hex >> 8) & 0xFF), b(hex & 0xFF) {}
-  FMT_CONSTEXPR rgb(color hex)
-      : r((uint32_t(hex) >> 16) & 0xFF),
-        g((uint32_t(hex) >> 8) & 0xFF),
-        b(uint32_t(hex) & 0xFF) {}
-  uint8_t r;
-  uint8_t g;
-  uint8_t b;
-};
-
-namespace detail {
-
-// color is a struct of either a rgb color or a terminal color.
-struct color_type {
-  FMT_CONSTEXPR color_type() noexcept : is_rgb(), value{} {}
-  FMT_CONSTEXPR color_type(color rgb_color) noexcept : is_rgb(true), value{} {
-    value.rgb_color = static_cast<uint32_t>(rgb_color);
-  }
-  FMT_CONSTEXPR color_type(rgb rgb_color) noexcept : is_rgb(true), value{} {
-    value.rgb_color = (static_cast<uint32_t>(rgb_color.r) << 16) |
-                      (static_cast<uint32_t>(rgb_color.g) << 8) | rgb_color.b;
-  }
-  FMT_CONSTEXPR color_type(terminal_color term_color) noexcept
-      : is_rgb(), value{} {
-    value.term_color = static_cast<uint8_t>(term_color);
-  }
-  bool is_rgb;
-  union color_union {
-    uint8_t term_color;
-    uint32_t rgb_color;
-  } value;
-};
-}  // namespace detail
-
-/** A text style consisting of foreground and background colors and emphasis. */
-class text_style {
- public:
-  FMT_CONSTEXPR text_style(emphasis em = emphasis()) noexcept
-      : set_foreground_color(), set_background_color(), ems(em) {}
-
-  FMT_CONSTEXPR auto operator|=(const text_style& rhs) -> text_style& {
-    if (!set_foreground_color) {
-      set_foreground_color = rhs.set_foreground_color;
-      foreground_color = rhs.foreground_color;
-    } else if (rhs.set_foreground_color) {
-      if (!foreground_color.is_rgb || !rhs.foreground_color.is_rgb)
-        FMT_THROW(format_error("can't OR a terminal color"));
-      foreground_color.value.rgb_color |= rhs.foreground_color.value.rgb_color;
-    }
-
-    if (!set_background_color) {
-      set_background_color = rhs.set_background_color;
-      background_color = rhs.background_color;
-    } else if (rhs.set_background_color) {
-      if (!background_color.is_rgb || !rhs.background_color.is_rgb)
-        FMT_THROW(format_error("can't OR a terminal color"));
-      background_color.value.rgb_color |= rhs.background_color.value.rgb_color;
-    }
-
-    ems = static_cast<emphasis>(static_cast<uint8_t>(ems) |
-                                static_cast<uint8_t>(rhs.ems));
-    return *this;
-  }
-
-  friend FMT_CONSTEXPR auto operator|(text_style lhs, const text_style& rhs)
-      -> text_style {
-    return lhs |= rhs;
-  }
-
-  FMT_CONSTEXPR auto has_foreground() const noexcept -> bool {
-    return set_foreground_color;
-  }
-  FMT_CONSTEXPR auto has_background() const noexcept -> bool {
-    return set_background_color;
-  }
-  FMT_CONSTEXPR auto has_emphasis() const noexcept -> bool {
-    return static_cast<uint8_t>(ems) != 0;
-  }
-  FMT_CONSTEXPR auto get_foreground() const noexcept -> detail::color_type {
-    FMT_ASSERT(has_foreground(), "no foreground specified for this style");
-    return foreground_color;
-  }
-  FMT_CONSTEXPR auto get_background() const noexcept -> detail::color_type {
-    FMT_ASSERT(has_background(), "no background specified for this style");
-    return background_color;
-  }
-  FMT_CONSTEXPR auto get_emphasis() const noexcept -> emphasis {
-    FMT_ASSERT(has_emphasis(), "no emphasis specified for this style");
-    return ems;
-  }
-
- private:
-  FMT_CONSTEXPR text_style(bool is_foreground,
-                           detail::color_type text_color) noexcept
-      : set_foreground_color(), set_background_color(), ems() {
-    if (is_foreground) {
-      foreground_color = text_color;
-      set_foreground_color = true;
-    } else {
-      background_color = text_color;
-      set_background_color = true;
-    }
-  }
-
-  friend FMT_CONSTEXPR auto fg(detail::color_type foreground) noexcept
-      -> text_style;
-
-  friend FMT_CONSTEXPR auto bg(detail::color_type background) noexcept
-      -> text_style;
-
-  detail::color_type foreground_color;
-  detail::color_type background_color;
-  bool set_foreground_color;
-  bool set_background_color;
-  emphasis ems;
-};
-
-/** Creates a text style from the foreground (text) color. */
-FMT_CONSTEXPR inline auto fg(detail::color_type foreground) noexcept
-    -> text_style {
-  return text_style(true, foreground);
-}
-
-/** Creates a text style from the background color. */
-FMT_CONSTEXPR inline auto bg(detail::color_type background) noexcept
-    -> text_style {
-  return text_style(false, background);
-}
-
-FMT_CONSTEXPR inline auto operator|(emphasis lhs, emphasis rhs) noexcept
-    -> text_style {
-  return text_style(lhs) | rhs;
-}
-
-namespace detail {
-
-template <typename Char> struct ansi_color_escape {
-  FMT_CONSTEXPR ansi_color_escape(detail::color_type text_color,
-                                  const char* esc) noexcept {
-    // If we have a terminal color, we need to output another escape code
-    // sequence.
-    if (!text_color.is_rgb) {
-      bool is_background = esc == string_view("\x1b[48;2;");
-      uint32_t value = text_color.value.term_color;
-      // Background ASCII codes are the same as the foreground ones but with
-      // 10 more.
-      if (is_background) value += 10u;
-
-      size_t index = 0;
-      buffer[index++] = static_cast<Char>('\x1b');
-      buffer[index++] = static_cast<Char>('[');
-
-      if (value >= 100u) {
-        buffer[index++] = static_cast<Char>('1');
-        value %= 100u;
-      }
-      buffer[index++] = static_cast<Char>('0' + value / 10u);
-      buffer[index++] = static_cast<Char>('0' + value % 10u);
-
-      buffer[index++] = static_cast<Char>('m');
-      buffer[index++] = static_cast<Char>('\0');
-      return;
-    }
-
-    for (int i = 0; i < 7; i++) {
-      buffer[i] = static_cast<Char>(esc[i]);
-    }
-    rgb color(text_color.value.rgb_color);
-    to_esc(color.r, buffer + 7, ';');
-    to_esc(color.g, buffer + 11, ';');
-    to_esc(color.b, buffer + 15, 'm');
-    buffer[19] = static_cast<Char>(0);
-  }
-  FMT_CONSTEXPR ansi_color_escape(emphasis em) noexcept {
-    uint8_t em_codes[num_emphases] = {};
-    if (has_emphasis(em, emphasis::bold)) em_codes[0] = 1;
-    if (has_emphasis(em, emphasis::faint)) em_codes[1] = 2;
-    if (has_emphasis(em, emphasis::italic)) em_codes[2] = 3;
-    if (has_emphasis(em, emphasis::underline)) em_codes[3] = 4;
-    if (has_emphasis(em, emphasis::blink)) em_codes[4] = 5;
-    if (has_emphasis(em, emphasis::reverse)) em_codes[5] = 7;
-    if (has_emphasis(em, emphasis::conceal)) em_codes[6] = 8;
-    if (has_emphasis(em, emphasis::strikethrough)) em_codes[7] = 9;
-
-    size_t index = 0;
-    for (size_t i = 0; i < num_emphases; ++i) {
-      if (!em_codes[i]) continue;
-      buffer[index++] = static_cast<Char>('\x1b');
-      buffer[index++] = static_cast<Char>('[');
-      buffer[index++] = static_cast<Char>('0' + em_codes[i]);
-      buffer[index++] = static_cast<Char>('m');
-    }
-    buffer[index++] = static_cast<Char>(0);
-  }
-  FMT_CONSTEXPR operator const Char*() const noexcept { return buffer; }
-
-  FMT_CONSTEXPR auto begin() const noexcept -> const Char* { return buffer; }
-  FMT_CONSTEXPR_CHAR_TRAITS auto end() const noexcept -> const Char* {
-    return buffer + std::char_traits<Char>::length(buffer);
-  }
-
- private:
-  static constexpr size_t num_emphases = 8;
-  Char buffer[7u + 3u * num_emphases + 1u];
-
-  static FMT_CONSTEXPR void to_esc(uint8_t c, Char* out,
-                                   char delimiter) noexcept {
-    out[0] = static_cast<Char>('0' + c / 100);
-    out[1] = static_cast<Char>('0' + c / 10 % 10);
-    out[2] = static_cast<Char>('0' + c % 10);
-    out[3] = static_cast<Char>(delimiter);
-  }
-  static FMT_CONSTEXPR auto has_emphasis(emphasis em, emphasis mask) noexcept
-      -> bool {
-    return static_cast<uint8_t>(em) & static_cast<uint8_t>(mask);
-  }
-};
-
-template <typename Char>
-FMT_CONSTEXPR auto make_foreground_color(detail::color_type foreground) noexcept
-    -> ansi_color_escape<Char> {
-  return ansi_color_escape<Char>(foreground, "\x1b[38;2;");
-}
-
-template <typename Char>
-FMT_CONSTEXPR auto make_background_color(detail::color_type background) noexcept
-    -> ansi_color_escape<Char> {
-  return ansi_color_escape<Char>(background, "\x1b[48;2;");
-}
-
-template <typename Char>
-FMT_CONSTEXPR auto make_emphasis(emphasis em) noexcept
-    -> ansi_color_escape<Char> {
-  return ansi_color_escape<Char>(em);
-}
-
-template <typename Char> inline void reset_color(buffer<Char>& buffer) {
-  auto reset_color = string_view("\x1b[0m");
-  buffer.append(reset_color.begin(), reset_color.end());
-}
-
-template <typename T> struct styled_arg : detail::view {
-  const T& value;
-  text_style style;
-  styled_arg(const T& v, text_style s) : value(v), style(s) {}
-};
-
-template <typename Char>
-void vformat_to(buffer<Char>& buf, const text_style& ts,
-                basic_string_view<Char> format_str,
-                basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  bool has_style = false;
-  if (ts.has_emphasis()) {
-    has_style = true;
-    auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
-    buf.append(emphasis.begin(), emphasis.end());
-  }
-  if (ts.has_foreground()) {
-    has_style = true;
-    auto foreground = detail::make_foreground_color<Char>(ts.get_foreground());
-    buf.append(foreground.begin(), foreground.end());
-  }
-  if (ts.has_background()) {
-    has_style = true;
-    auto background = detail::make_background_color<Char>(ts.get_background());
-    buf.append(background.begin(), background.end());
-  }
-  detail::vformat_to(buf, format_str, args, {});
-  if (has_style) detail::reset_color<Char>(buf);
-}
-
-}  // namespace detail
-
-inline void vprint(std::FILE* f, const text_style& ts, string_view fmt,
-                   format_args args) {
-  // Legacy wide streams are not supported.
-  auto buf = memory_buffer();
-  detail::vformat_to(buf, ts, fmt, args);
-  if (detail::is_utf8()) {
-    detail::print(f, string_view(buf.begin(), buf.size()));
-    return;
-  }
-  buf.push_back('\0');
-  int result = std::fputs(buf.data(), f);
-  if (result < 0)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
-}
-
-/**
-  \rst
-  Formats a string and prints it to the specified file stream using ANSI
-  escape sequences to specify text formatting.
-
-  **Example**::
-
-    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
-               "Elapsed time: {0:.2f} seconds", 1.23);
-  \endrst
- */
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_string<S>::value)>
-void print(std::FILE* f, const text_style& ts, const S& format_str,
-           const Args&... args) {
-  vprint(f, ts, format_str,
-         fmt::make_format_args<buffer_context<char_t<S>>>(args...));
-}
-
-/**
-  \rst
-  Formats a string and prints it to stdout using ANSI escape sequences to
-  specify text formatting.
-
-  **Example**::
-
-    fmt::print(fmt::emphasis::bold | fg(fmt::color::red),
-               "Elapsed time: {0:.2f} seconds", 1.23);
-  \endrst
- */
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_string<S>::value)>
-void print(const text_style& ts, const S& format_str, const Args&... args) {
-  return print(stdout, ts, format_str, args...);
-}
-
-template <typename S, typename Char = char_t<S>>
-inline auto vformat(
-    const text_style& ts, const S& format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> std::basic_string<Char> {
-  basic_memory_buffer<Char> buf;
-  detail::vformat_to(buf, ts, detail::to_string_view(format_str), args);
-  return fmt::to_string(buf);
-}
-
-/**
-  \rst
-  Formats arguments and returns the result as a string using ANSI
-  escape sequences to specify text formatting.
-
-  **Example**::
-
-    #include <fmt/color.h>
-    std::string message = fmt::format(fmt::emphasis::bold | fg(fmt::color::red),
-                                      "The answer is {}", 42);
-  \endrst
-*/
-template <typename S, typename... Args, typename Char = char_t<S>>
-inline auto format(const text_style& ts, const S& format_str,
-                   const Args&... args) -> std::basic_string<Char> {
-  return fmt::vformat(ts, detail::to_string_view(format_str),
-                      fmt::make_format_args<buffer_context<Char>>(args...));
-}
-
-/**
-  Formats a string with the given text_style and writes the output to ``out``.
- */
-template <typename OutputIt, typename Char,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value)>
-auto vformat_to(OutputIt out, const text_style& ts,
-                basic_string_view<Char> format_str,
-                basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> OutputIt {
-  auto&& buf = detail::get_buffer<Char>(out);
-  detail::vformat_to(buf, ts, format_str, args);
-  return detail::get_iterator(buf, out);
-}
-
-/**
-  \rst
-  Formats arguments with the given text_style, writes the result to the output
-  iterator ``out`` and returns the iterator past the end of the output range.
-
-  **Example**::
-
-    std::vector<char> out;
-    fmt::format_to(std::back_inserter(out),
-                   fmt::emphasis::bold | fg(fmt::color::red), "{}", 42);
-  \endrst
-*/
-template <
-    typename OutputIt, typename S, typename... Args,
-    bool enable = detail::is_output_iterator<OutputIt, char_t<S>>::value &&
-                  detail::is_string<S>::value>
-inline auto format_to(OutputIt out, const text_style& ts, const S& format_str,
-                      Args&&... args) ->
-    typename std::enable_if<enable, OutputIt>::type {
-  return vformat_to(out, ts, detail::to_string_view(format_str),
-                    fmt::make_format_args<buffer_context<char_t<S>>>(args...));
-}
-
-template <typename T, typename Char>
-struct formatter<detail::styled_arg<T>, Char> : formatter<T, Char> {
-  template <typename FormatContext>
-  auto format(const detail::styled_arg<T>& arg, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    const auto& ts = arg.style;
-    const auto& value = arg.value;
-    auto out = ctx.out();
-
-    bool has_style = false;
-    if (ts.has_emphasis()) {
-      has_style = true;
-      auto emphasis = detail::make_emphasis<Char>(ts.get_emphasis());
-      out = std::copy(emphasis.begin(), emphasis.end(), out);
-    }
-    if (ts.has_foreground()) {
-      has_style = true;
-      auto foreground =
-          detail::make_foreground_color<Char>(ts.get_foreground());
-      out = std::copy(foreground.begin(), foreground.end(), out);
-    }
-    if (ts.has_background()) {
-      has_style = true;
-      auto background =
-          detail::make_background_color<Char>(ts.get_background());
-      out = std::copy(background.begin(), background.end(), out);
-    }
-    out = formatter<T, Char>::format(value, ctx);
-    if (has_style) {
-      auto reset_color = string_view("\x1b[0m");
-      out = std::copy(reset_color.begin(), reset_color.end(), out);
-    }
-    return out;
-  }
-};
-
-/**
-  \rst
-  Returns an argument that will be formatted using ANSI escape sequences,
-  to be used in a formatting function.
-
-  **Example**::
-
-    fmt::print("Elapsed time: {0:.2f} seconds",
-               fmt::styled(1.23, fmt::fg(fmt::color::green) |
-                                 fmt::bg(fmt::color::blue)));
-  \endrst
- */
-template <typename T>
-FMT_CONSTEXPR auto styled(const T& value, text_style ts)
-    -> detail::styled_arg<remove_cvref_t<T>> {
-  return detail::styled_arg<remove_cvref_t<T>>{value, ts};
-}
-
-FMT_END_EXPORT
-FMT_END_NAMESPACE
-
-#endif  // FMT_COLOR_H_
diff --git a/3party/fmt/include/fmt/compile.h b/3party/fmt/include/fmt/compile.h
deleted file mode 100644
index 3b3f166..0000000
--- a/3party/fmt/include/fmt/compile.h
+++ /dev/null
@@ -1,535 +0,0 @@
-// Formatting library for C++ - experimental format string compilation
-//
-// Copyright (c) 2012 - present, Victor Zverovich and fmt contributors
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_COMPILE_H_
-#define FMT_COMPILE_H_
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-template <typename Char, typename InputIt>
-FMT_CONSTEXPR inline auto copy_str(InputIt begin, InputIt end,
-                                   counting_iterator it) -> counting_iterator {
-  return it + (end - begin);
-}
-
-// A compile-time string which is compiled into fast formatting code.
-class compiled_string {};
-
-template <typename S>
-struct is_compiled_string : std::is_base_of<compiled_string, S> {};
-
-/**
-  \rst
-  Converts a string literal *s* into a format string that will be parsed at
-  compile time and converted into efficient formatting code. Requires C++17
-  ``constexpr if`` compiler support.
-
-  **Example**::
-
-    // Converts 42 into std::string using the most efficient method and no
-    // runtime format string processing.
-    std::string s = fmt::format(FMT_COMPILE("{}"), 42);
-  \endrst
- */
-#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
-#  define FMT_COMPILE(s) \
-    FMT_STRING_IMPL(s, fmt::detail::compiled_string, explicit)
-#else
-#  define FMT_COMPILE(s) FMT_STRING(s)
-#endif
-
-#if FMT_USE_NONTYPE_TEMPLATE_ARGS
-template <typename Char, size_t N,
-          fmt::detail_exported::fixed_string<Char, N> Str>
-struct udl_compiled_string : compiled_string {
-  using char_type = Char;
-  explicit constexpr operator basic_string_view<char_type>() const {
-    return {Str.data, N - 1};
-  }
-};
-#endif
-
-template <typename T, typename... Tail>
-auto first(const T& value, const Tail&...) -> const T& {
-  return value;
-}
-
-#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
-template <typename... Args> struct type_list {};
-
-// Returns a reference to the argument at index N from [first, rest...].
-template <int N, typename T, typename... Args>
-constexpr const auto& get([[maybe_unused]] const T& first,
-                          [[maybe_unused]] const Args&... rest) {
-  static_assert(N < 1 + sizeof...(Args), "index is out of bounds");
-  if constexpr (N == 0)
-    return first;
-  else
-    return detail::get<N - 1>(rest...);
-}
-
-template <typename Char, typename... Args>
-constexpr int get_arg_index_by_name(basic_string_view<Char> name,
-                                    type_list<Args...>) {
-  return get_arg_index_by_name<Args...>(name);
-}
-
-template <int N, typename> struct get_type_impl;
-
-template <int N, typename... Args> struct get_type_impl<N, type_list<Args...>> {
-  using type =
-      remove_cvref_t<decltype(detail::get<N>(std::declval<Args>()...))>;
-};
-
-template <int N, typename T>
-using get_type = typename get_type_impl<N, T>::type;
-
-template <typename T> struct is_compiled_format : std::false_type {};
-
-template <typename Char> struct text {
-  basic_string_view<Char> data;
-  using char_type = Char;
-
-  template <typename OutputIt, typename... Args>
-  constexpr OutputIt format(OutputIt out, const Args&...) const {
-    return write<Char>(out, data);
-  }
-};
-
-template <typename Char>
-struct is_compiled_format<text<Char>> : std::true_type {};
-
-template <typename Char>
-constexpr text<Char> make_text(basic_string_view<Char> s, size_t pos,
-                               size_t size) {
-  return {{&s[pos], size}};
-}
-
-template <typename Char> struct code_unit {
-  Char value;
-  using char_type = Char;
-
-  template <typename OutputIt, typename... Args>
-  constexpr OutputIt format(OutputIt out, const Args&...) const {
-    *out++ = value;
-    return out;
-  }
-};
-
-// This ensures that the argument type is convertible to `const T&`.
-template <typename T, int N, typename... Args>
-constexpr const T& get_arg_checked(const Args&... args) {
-  const auto& arg = detail::get<N>(args...);
-  if constexpr (detail::is_named_arg<remove_cvref_t<decltype(arg)>>()) {
-    return arg.value;
-  } else {
-    return arg;
-  }
-}
-
-template <typename Char>
-struct is_compiled_format<code_unit<Char>> : std::true_type {};
-
-// A replacement field that refers to argument N.
-template <typename Char, typename T, int N> struct field {
-  using char_type = Char;
-
-  template <typename OutputIt, typename... Args>
-  constexpr OutputIt format(OutputIt out, const Args&... args) const {
-    const T& arg = get_arg_checked<T, N>(args...);
-    if constexpr (std::is_convertible_v<T, basic_string_view<Char>>) {
-      auto s = basic_string_view<Char>(arg);
-      return copy_str<Char>(s.begin(), s.end(), out);
-    }
-    return write<Char>(out, arg);
-  }
-};
-
-template <typename Char, typename T, int N>
-struct is_compiled_format<field<Char, T, N>> : std::true_type {};
-
-// A replacement field that refers to argument with name.
-template <typename Char> struct runtime_named_field {
-  using char_type = Char;
-  basic_string_view<Char> name;
-
-  template <typename OutputIt, typename T>
-  constexpr static bool try_format_argument(
-      OutputIt& out,
-      // [[maybe_unused]] due to unused-but-set-parameter warning in GCC 7,8,9
-      [[maybe_unused]] basic_string_view<Char> arg_name, const T& arg) {
-    if constexpr (is_named_arg<typename std::remove_cv<T>::type>::value) {
-      if (arg_name == arg.name) {
-        out = write<Char>(out, arg.value);
-        return true;
-      }
-    }
-    return false;
-  }
-
-  template <typename OutputIt, typename... Args>
-  constexpr OutputIt format(OutputIt out, const Args&... args) const {
-    bool found = (try_format_argument(out, name, args) || ...);
-    if (!found) {
-      FMT_THROW(format_error("argument with specified name is not found"));
-    }
-    return out;
-  }
-};
-
-template <typename Char>
-struct is_compiled_format<runtime_named_field<Char>> : std::true_type {};
-
-// A replacement field that refers to argument N and has format specifiers.
-template <typename Char, typename T, int N> struct spec_field {
-  using char_type = Char;
-  formatter<T, Char> fmt;
-
-  template <typename OutputIt, typename... Args>
-  constexpr FMT_INLINE OutputIt format(OutputIt out,
-                                       const Args&... args) const {
-    const auto& vargs =
-        fmt::make_format_args<basic_format_context<OutputIt, Char>>(args...);
-    basic_format_context<OutputIt, Char> ctx(out, vargs);
-    return fmt.format(get_arg_checked<T, N>(args...), ctx);
-  }
-};
-
-template <typename Char, typename T, int N>
-struct is_compiled_format<spec_field<Char, T, N>> : std::true_type {};
-
-template <typename L, typename R> struct concat {
-  L lhs;
-  R rhs;
-  using char_type = typename L::char_type;
-
-  template <typename OutputIt, typename... Args>
-  constexpr OutputIt format(OutputIt out, const Args&... args) const {
-    out = lhs.format(out, args...);
-    return rhs.format(out, args...);
-  }
-};
-
-template <typename L, typename R>
-struct is_compiled_format<concat<L, R>> : std::true_type {};
-
-template <typename L, typename R>
-constexpr concat<L, R> make_concat(L lhs, R rhs) {
-  return {lhs, rhs};
-}
-
-struct unknown_format {};
-
-template <typename Char>
-constexpr size_t parse_text(basic_string_view<Char> str, size_t pos) {
-  for (size_t size = str.size(); pos != size; ++pos) {
-    if (str[pos] == '{' || str[pos] == '}') break;
-  }
-  return pos;
-}
-
-template <typename Args, size_t POS, int ID, typename S>
-constexpr auto compile_format_string(S format_str);
-
-template <typename Args, size_t POS, int ID, typename T, typename S>
-constexpr auto parse_tail(T head, S format_str) {
-  if constexpr (POS !=
-                basic_string_view<typename S::char_type>(format_str).size()) {
-    constexpr auto tail = compile_format_string<Args, POS, ID>(format_str);
-    if constexpr (std::is_same<remove_cvref_t<decltype(tail)>,
-                               unknown_format>())
-      return tail;
-    else
-      return make_concat(head, tail);
-  } else {
-    return head;
-  }
-}
-
-template <typename T, typename Char> struct parse_specs_result {
-  formatter<T, Char> fmt;
-  size_t end;
-  int next_arg_id;
-};
-
-enum { manual_indexing_id = -1 };
-
-template <typename T, typename Char>
-constexpr parse_specs_result<T, Char> parse_specs(basic_string_view<Char> str,
-                                                  size_t pos, int next_arg_id) {
-  str.remove_prefix(pos);
-  auto ctx =
-      compile_parse_context<Char>(str, max_value<int>(), nullptr, next_arg_id);
-  auto f = formatter<T, Char>();
-  auto end = f.parse(ctx);
-  return {f, pos + fmt::detail::to_unsigned(end - str.data()),
-          next_arg_id == 0 ? manual_indexing_id : ctx.next_arg_id()};
-}
-
-template <typename Char> struct arg_id_handler {
-  arg_ref<Char> arg_id;
-
-  constexpr int on_auto() {
-    FMT_ASSERT(false, "handler cannot be used with automatic indexing");
-    return 0;
-  }
-  constexpr int on_index(int id) {
-    arg_id = arg_ref<Char>(id);
-    return 0;
-  }
-  constexpr int on_name(basic_string_view<Char> id) {
-    arg_id = arg_ref<Char>(id);
-    return 0;
-  }
-};
-
-template <typename Char> struct parse_arg_id_result {
-  arg_ref<Char> arg_id;
-  const Char* arg_id_end;
-};
-
-template <int ID, typename Char>
-constexpr auto parse_arg_id(const Char* begin, const Char* end) {
-  auto handler = arg_id_handler<Char>{arg_ref<Char>{}};
-  auto arg_id_end = parse_arg_id(begin, end, handler);
-  return parse_arg_id_result<Char>{handler.arg_id, arg_id_end};
-}
-
-template <typename T, typename Enable = void> struct field_type {
-  using type = remove_cvref_t<T>;
-};
-
-template <typename T>
-struct field_type<T, enable_if_t<detail::is_named_arg<T>::value>> {
-  using type = remove_cvref_t<decltype(T::value)>;
-};
-
-template <typename T, typename Args, size_t END_POS, int ARG_INDEX, int NEXT_ID,
-          typename S>
-constexpr auto parse_replacement_field_then_tail(S format_str) {
-  using char_type = typename S::char_type;
-  constexpr auto str = basic_string_view<char_type>(format_str);
-  constexpr char_type c = END_POS != str.size() ? str[END_POS] : char_type();
-  if constexpr (c == '}') {
-    return parse_tail<Args, END_POS + 1, NEXT_ID>(
-        field<char_type, typename field_type<T>::type, ARG_INDEX>(),
-        format_str);
-  } else if constexpr (c != ':') {
-    FMT_THROW(format_error("expected ':'"));
-  } else {
-    constexpr auto result = parse_specs<typename field_type<T>::type>(
-        str, END_POS + 1, NEXT_ID == manual_indexing_id ? 0 : NEXT_ID);
-    if constexpr (result.end >= str.size() || str[result.end] != '}') {
-      FMT_THROW(format_error("expected '}'"));
-      return 0;
-    } else {
-      return parse_tail<Args, result.end + 1, result.next_arg_id>(
-          spec_field<char_type, typename field_type<T>::type, ARG_INDEX>{
-              result.fmt},
-          format_str);
-    }
-  }
-}
-
-// Compiles a non-empty format string and returns the compiled representation
-// or unknown_format() on unrecognized input.
-template <typename Args, size_t POS, int ID, typename S>
-constexpr auto compile_format_string(S format_str) {
-  using char_type = typename S::char_type;
-  constexpr auto str = basic_string_view<char_type>(format_str);
-  if constexpr (str[POS] == '{') {
-    if constexpr (POS + 1 == str.size())
-      FMT_THROW(format_error("unmatched '{' in format string"));
-    if constexpr (str[POS + 1] == '{') {
-      return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
-    } else if constexpr (str[POS + 1] == '}' || str[POS + 1] == ':') {
-      static_assert(ID != manual_indexing_id,
-                    "cannot switch from manual to automatic argument indexing");
-      constexpr auto next_id =
-          ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
-      return parse_replacement_field_then_tail<get_type<ID, Args>, Args,
-                                               POS + 1, ID, next_id>(
-          format_str);
-    } else {
-      constexpr auto arg_id_result =
-          parse_arg_id<ID>(str.data() + POS + 1, str.data() + str.size());
-      constexpr auto arg_id_end_pos = arg_id_result.arg_id_end - str.data();
-      constexpr char_type c =
-          arg_id_end_pos != str.size() ? str[arg_id_end_pos] : char_type();
-      static_assert(c == '}' || c == ':', "missing '}' in format string");
-      if constexpr (arg_id_result.arg_id.kind == arg_id_kind::index) {
-        static_assert(
-            ID == manual_indexing_id || ID == 0,
-            "cannot switch from automatic to manual argument indexing");
-        constexpr auto arg_index = arg_id_result.arg_id.val.index;
-        return parse_replacement_field_then_tail<get_type<arg_index, Args>,
-                                                 Args, arg_id_end_pos,
-                                                 arg_index, manual_indexing_id>(
-            format_str);
-      } else if constexpr (arg_id_result.arg_id.kind == arg_id_kind::name) {
-        constexpr auto arg_index =
-            get_arg_index_by_name(arg_id_result.arg_id.val.name, Args{});
-        if constexpr (arg_index >= 0) {
-          constexpr auto next_id =
-              ID != manual_indexing_id ? ID + 1 : manual_indexing_id;
-          return parse_replacement_field_then_tail<
-              decltype(get_type<arg_index, Args>::value), Args, arg_id_end_pos,
-              arg_index, next_id>(format_str);
-        } else if constexpr (c == '}') {
-          return parse_tail<Args, arg_id_end_pos + 1, ID>(
-              runtime_named_field<char_type>{arg_id_result.arg_id.val.name},
-              format_str);
-        } else if constexpr (c == ':') {
-          return unknown_format();  // no type info for specs parsing
-        }
-      }
-    }
-  } else if constexpr (str[POS] == '}') {
-    if constexpr (POS + 1 == str.size())
-      FMT_THROW(format_error("unmatched '}' in format string"));
-    return parse_tail<Args, POS + 2, ID>(make_text(str, POS, 1), format_str);
-  } else {
-    constexpr auto end = parse_text(str, POS + 1);
-    if constexpr (end - POS > 1) {
-      return parse_tail<Args, end, ID>(make_text(str, POS, end - POS),
-                                       format_str);
-    } else {
-      return parse_tail<Args, end, ID>(code_unit<char_type>{str[POS]},
-                                       format_str);
-    }
-  }
-}
-
-template <typename... Args, typename S,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-constexpr auto compile(S format_str) {
-  constexpr auto str = basic_string_view<typename S::char_type>(format_str);
-  if constexpr (str.size() == 0) {
-    return detail::make_text(str, 0, 0);
-  } else {
-    constexpr auto result =
-        detail::compile_format_string<detail::type_list<Args...>, 0, 0>(
-            format_str);
-    return result;
-  }
-}
-#endif  // defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
-}  // namespace detail
-
-FMT_BEGIN_EXPORT
-
-#if defined(__cpp_if_constexpr) && defined(__cpp_return_type_deduction)
-
-template <typename CompiledFormat, typename... Args,
-          typename Char = typename CompiledFormat::char_type,
-          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
-FMT_INLINE std::basic_string<Char> format(const CompiledFormat& cf,
-                                          const Args&... args) {
-  auto s = std::basic_string<Char>();
-  cf.format(std::back_inserter(s), args...);
-  return s;
-}
-
-template <typename OutputIt, typename CompiledFormat, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_format<CompiledFormat>::value)>
-constexpr FMT_INLINE OutputIt format_to(OutputIt out, const CompiledFormat& cf,
-                                        const Args&... args) {
-  return cf.format(out, args...);
-}
-
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-FMT_INLINE std::basic_string<typename S::char_type> format(const S&,
-                                                           Args&&... args) {
-  if constexpr (std::is_same<typename S::char_type, char>::value) {
-    constexpr auto str = basic_string_view<typename S::char_type>(S());
-    if constexpr (str.size() == 2 && str[0] == '{' && str[1] == '}') {
-      const auto& first = detail::first(args...);
-      if constexpr (detail::is_named_arg<
-                        remove_cvref_t<decltype(first)>>::value) {
-        return fmt::to_string(first.value);
-      } else {
-        return fmt::to_string(first);
-      }
-    }
-  }
-  constexpr auto compiled = detail::compile<Args...>(S());
-  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
-                             detail::unknown_format>()) {
-    return fmt::format(
-        static_cast<basic_string_view<typename S::char_type>>(S()),
-        std::forward<Args>(args)...);
-  } else {
-    return fmt::format(compiled, std::forward<Args>(args)...);
-  }
-}
-
-template <typename OutputIt, typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-FMT_CONSTEXPR OutputIt format_to(OutputIt out, const S&, Args&&... args) {
-  constexpr auto compiled = detail::compile<Args...>(S());
-  if constexpr (std::is_same<remove_cvref_t<decltype(compiled)>,
-                             detail::unknown_format>()) {
-    return fmt::format_to(
-        out, static_cast<basic_string_view<typename S::char_type>>(S()),
-        std::forward<Args>(args)...);
-  } else {
-    return fmt::format_to(out, compiled, std::forward<Args>(args)...);
-  }
-}
-#endif
-
-template <typename OutputIt, typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-auto format_to_n(OutputIt out, size_t n, const S& format_str, Args&&... args)
-    -> format_to_n_result<OutputIt> {
-  using traits = detail::fixed_buffer_traits;
-  auto buf = detail::iterator_buffer<OutputIt, char, traits>(out, n);
-  fmt::format_to(std::back_inserter(buf), format_str,
-                 std::forward<Args>(args)...);
-  return {buf.out(), buf.count()};
-}
-
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-FMT_CONSTEXPR20 auto formatted_size(const S& format_str, const Args&... args)
-    -> size_t {
-  return fmt::format_to(detail::counting_iterator(), format_str, args...)
-      .count();
-}
-
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-void print(std::FILE* f, const S& format_str, const Args&... args) {
-  memory_buffer buffer;
-  fmt::format_to(std::back_inserter(buffer), format_str, args...);
-  detail::print(f, {buffer.data(), buffer.size()});
-}
-
-template <typename S, typename... Args,
-          FMT_ENABLE_IF(detail::is_compiled_string<S>::value)>
-void print(const S& format_str, const Args&... args) {
-  print(stdout, format_str, args...);
-}
-
-#if FMT_USE_NONTYPE_TEMPLATE_ARGS
-inline namespace literals {
-template <detail_exported::fixed_string Str> constexpr auto operator""_cf() {
-  using char_t = remove_cvref_t<decltype(Str.data[0])>;
-  return detail::udl_compiled_string<char_t, sizeof(Str.data) / sizeof(char_t),
-                                     Str>();
-}
-}  // namespace literals
-#endif
-
-FMT_END_EXPORT
-FMT_END_NAMESPACE
-
-#endif  // FMT_COMPILE_H_
diff --git a/3party/fmt/include/fmt/core.h b/3party/fmt/include/fmt/core.h
deleted file mode 100644
index b51c140..0000000
--- a/3party/fmt/include/fmt/core.h
+++ /dev/null
@@ -1,2969 +0,0 @@
-// Formatting library for C++ - the core API for char/UTF-8
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_CORE_H_
-#define FMT_CORE_H_
-
-#include <cstddef>  // std::byte
-#include <cstdio>   // std::FILE
-#include <cstring>  // std::strlen
-#include <iterator>
-#include <limits>
-#include <memory>  // std::addressof
-#include <string>
-#include <type_traits>
-
-// The fmt library version in the form major * 10000 + minor * 100 + patch.
-#define FMT_VERSION 100201
-
-#if defined(__clang__) && !defined(__ibmxl__)
-#  define FMT_CLANG_VERSION (__clang_major__ * 100 + __clang_minor__)
-#else
-#  define FMT_CLANG_VERSION 0
-#endif
-
-#if defined(__GNUC__) && !defined(__clang__) && !defined(__INTEL_COMPILER) && \
-    !defined(__NVCOMPILER)
-#  define FMT_GCC_VERSION (__GNUC__ * 100 + __GNUC_MINOR__)
-#else
-#  define FMT_GCC_VERSION 0
-#endif
-
-#ifndef FMT_GCC_PRAGMA
-// Workaround _Pragma bug https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59884.
-#  if FMT_GCC_VERSION >= 504
-#    define FMT_GCC_PRAGMA(arg) _Pragma(arg)
-#  else
-#    define FMT_GCC_PRAGMA(arg)
-#  endif
-#endif
-
-#ifdef __ICL
-#  define FMT_ICC_VERSION __ICL
-#elif defined(__INTEL_COMPILER)
-#  define FMT_ICC_VERSION __INTEL_COMPILER
-#else
-#  define FMT_ICC_VERSION 0
-#endif
-
-#ifdef _MSC_VER
-#  define FMT_MSC_VERSION _MSC_VER
-#  define FMT_MSC_WARNING(...) __pragma(warning(__VA_ARGS__))
-#else
-#  define FMT_MSC_VERSION 0
-#  define FMT_MSC_WARNING(...)
-#endif
-
-#ifdef _MSVC_LANG
-#  define FMT_CPLUSPLUS _MSVC_LANG
-#else
-#  define FMT_CPLUSPLUS __cplusplus
-#endif
-
-#ifdef __has_feature
-#  define FMT_HAS_FEATURE(x) __has_feature(x)
-#else
-#  define FMT_HAS_FEATURE(x) 0
-#endif
-
-#if defined(__has_include) || FMT_ICC_VERSION >= 1600 || FMT_MSC_VERSION > 1900
-#  define FMT_HAS_INCLUDE(x) __has_include(x)
-#else
-#  define FMT_HAS_INCLUDE(x) 0
-#endif
-
-#ifdef __has_cpp_attribute
-#  define FMT_HAS_CPP_ATTRIBUTE(x) __has_cpp_attribute(x)
-#else
-#  define FMT_HAS_CPP_ATTRIBUTE(x) 0
-#endif
-
-#define FMT_HAS_CPP14_ATTRIBUTE(attribute) \
-  (FMT_CPLUSPLUS >= 201402L && FMT_HAS_CPP_ATTRIBUTE(attribute))
-
-#define FMT_HAS_CPP17_ATTRIBUTE(attribute) \
-  (FMT_CPLUSPLUS >= 201703L && FMT_HAS_CPP_ATTRIBUTE(attribute))
-
-// Check if relaxed C++14 constexpr is supported.
-// GCC doesn't allow throw in constexpr until version 6 (bug 67371).
-#ifndef FMT_USE_CONSTEXPR
-#  if (FMT_HAS_FEATURE(cxx_relaxed_constexpr) || FMT_MSC_VERSION >= 1912 || \
-       (FMT_GCC_VERSION >= 600 && FMT_CPLUSPLUS >= 201402L)) &&             \
-      !FMT_ICC_VERSION && (!defined(__NVCC__) || FMT_CPLUSPLUS >= 202002L)
-#    define FMT_USE_CONSTEXPR 1
-#  else
-#    define FMT_USE_CONSTEXPR 0
-#  endif
-#endif
-#if FMT_USE_CONSTEXPR
-#  define FMT_CONSTEXPR constexpr
-#else
-#  define FMT_CONSTEXPR
-#endif
-
-#if (FMT_CPLUSPLUS >= 202002L ||                                \
-     (FMT_CPLUSPLUS >= 201709L && FMT_GCC_VERSION >= 1002)) &&  \
-    ((!defined(_GLIBCXX_RELEASE) || _GLIBCXX_RELEASE >= 10) &&  \
-     (!defined(_LIBCPP_VERSION) || _LIBCPP_VERSION >= 10000) && \
-     (!FMT_MSC_VERSION || FMT_MSC_VERSION >= 1928)) &&          \
-    defined(__cpp_lib_is_constant_evaluated)
-#  define FMT_CONSTEXPR20 constexpr
-#else
-#  define FMT_CONSTEXPR20
-#endif
-
-// Check if constexpr std::char_traits<>::{compare,length} are supported.
-#if defined(__GLIBCXX__)
-#  if FMT_CPLUSPLUS >= 201703L && defined(_GLIBCXX_RELEASE) && \
-      _GLIBCXX_RELEASE >= 7  // GCC 7+ libstdc++ has _GLIBCXX_RELEASE.
-#    define FMT_CONSTEXPR_CHAR_TRAITS constexpr
-#  endif
-#elif defined(_LIBCPP_VERSION) && FMT_CPLUSPLUS >= 201703L && \
-    _LIBCPP_VERSION >= 4000
-#  define FMT_CONSTEXPR_CHAR_TRAITS constexpr
-#elif FMT_MSC_VERSION >= 1914 && FMT_CPLUSPLUS >= 201703L
-#  define FMT_CONSTEXPR_CHAR_TRAITS constexpr
-#endif
-#ifndef FMT_CONSTEXPR_CHAR_TRAITS
-#  define FMT_CONSTEXPR_CHAR_TRAITS
-#endif
-
-// Check if exceptions are disabled.
-#ifndef FMT_EXCEPTIONS
-#  if (defined(__GNUC__) && !defined(__EXCEPTIONS)) || \
-      (FMT_MSC_VERSION && !_HAS_EXCEPTIONS)
-#    define FMT_EXCEPTIONS 0
-#  else
-#    define FMT_EXCEPTIONS 1
-#  endif
-#endif
-
-// Disable [[noreturn]] on MSVC/NVCC because of bogus unreachable code warnings.
-#if FMT_EXCEPTIONS && FMT_HAS_CPP_ATTRIBUTE(noreturn) && !FMT_MSC_VERSION && \
-    !defined(__NVCC__)
-#  define FMT_NORETURN [[noreturn]]
-#else
-#  define FMT_NORETURN
-#endif
-
-#ifndef FMT_NODISCARD
-#  if FMT_HAS_CPP17_ATTRIBUTE(nodiscard)
-#    define FMT_NODISCARD [[nodiscard]]
-#  else
-#    define FMT_NODISCARD
-#  endif
-#endif
-
-#ifndef FMT_INLINE
-#  if FMT_GCC_VERSION || FMT_CLANG_VERSION
-#    define FMT_INLINE inline __attribute__((always_inline))
-#  else
-#    define FMT_INLINE inline
-#  endif
-#endif
-
-#ifdef _MSC_VER
-#  define FMT_UNCHECKED_ITERATOR(It) \
-    using _Unchecked_type = It  // Mark iterator as checked.
-#else
-#  define FMT_UNCHECKED_ITERATOR(It) using unchecked_type = It
-#endif
-
-#ifndef FMT_BEGIN_NAMESPACE
-#  define FMT_BEGIN_NAMESPACE \
-    namespace fmt {           \
-    inline namespace v10 {
-#  define FMT_END_NAMESPACE \
-    }                       \
-    }
-#endif
-
-#ifndef FMT_EXPORT
-#  define FMT_EXPORT
-#  define FMT_BEGIN_EXPORT
-#  define FMT_END_EXPORT
-#endif
-
-#if FMT_GCC_VERSION || FMT_CLANG_VERSION
-#  define FMT_VISIBILITY(value) __attribute__((visibility(value)))
-#else
-#  define FMT_VISIBILITY(value)
-#endif
-
-#if !defined(FMT_HEADER_ONLY) && defined(_WIN32)
-#  if defined(FMT_LIB_EXPORT)
-#    define FMT_API __declspec(dllexport)
-#  elif defined(FMT_SHARED)
-#    define FMT_API __declspec(dllimport)
-#  endif
-#elif defined(FMT_LIB_EXPORT) || defined(FMT_SHARED)
-#  define FMT_API FMT_VISIBILITY("default")
-#endif
-#ifndef FMT_API
-#  define FMT_API
-#endif
-
-// libc++ supports string_view in pre-c++17.
-#if FMT_HAS_INCLUDE(<string_view>) && \
-    (FMT_CPLUSPLUS >= 201703L || defined(_LIBCPP_VERSION))
-#  include <string_view>
-#  define FMT_USE_STRING_VIEW
-#elif FMT_HAS_INCLUDE("experimental/string_view") && FMT_CPLUSPLUS >= 201402L
-#  include <experimental/string_view>
-#  define FMT_USE_EXPERIMENTAL_STRING_VIEW
-#endif
-
-#ifndef FMT_UNICODE
-#  define FMT_UNICODE !FMT_MSC_VERSION
-#endif
-
-#ifndef FMT_CONSTEVAL
-#  if ((FMT_GCC_VERSION >= 1000 || FMT_CLANG_VERSION >= 1101) && \
-       (!defined(__apple_build_version__) ||                     \
-        __apple_build_version__ >= 14000029L) &&                 \
-       FMT_CPLUSPLUS >= 202002L) ||                              \
-      (defined(__cpp_consteval) &&                               \
-       (!FMT_MSC_VERSION || FMT_MSC_VERSION >= 1929))
-// consteval is broken in MSVC before VS2019 version 16.10 and Apple clang
-// before 14.
-#    define FMT_CONSTEVAL consteval
-#    define FMT_HAS_CONSTEVAL
-#  else
-#    define FMT_CONSTEVAL
-#  endif
-#endif
-
-#ifndef FMT_USE_NONTYPE_TEMPLATE_ARGS
-#  if defined(__cpp_nontype_template_args) &&                  \
-      ((FMT_GCC_VERSION >= 903 && FMT_CPLUSPLUS >= 201709L) || \
-       __cpp_nontype_template_args >= 201911L) &&              \
-      !defined(__NVCOMPILER) && !defined(__LCC__)
-#    define FMT_USE_NONTYPE_TEMPLATE_ARGS 1
-#  else
-#    define FMT_USE_NONTYPE_TEMPLATE_ARGS 0
-#  endif
-#endif
-
-// GCC < 5 requires this-> in decltype
-#ifndef FMT_DECLTYPE_THIS
-#  if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
-#    define FMT_DECLTYPE_THIS this->
-#  else
-#    define FMT_DECLTYPE_THIS
-#  endif
-#endif
-
-// Enable minimal optimizations for more compact code in debug mode.
-FMT_GCC_PRAGMA("GCC push_options")
-#if !defined(__OPTIMIZE__) && !defined(__NVCOMPILER) && !defined(__LCC__) && \
-    !defined(__CUDACC__)
-FMT_GCC_PRAGMA("GCC optimize(\"Og\")")
-#endif
-
-FMT_BEGIN_NAMESPACE
-
-// Implementations of enable_if_t and other metafunctions for older systems.
-template <bool B, typename T = void>
-using enable_if_t = typename std::enable_if<B, T>::type;
-template <bool B, typename T, typename F>
-using conditional_t = typename std::conditional<B, T, F>::type;
-template <bool B> using bool_constant = std::integral_constant<bool, B>;
-template <typename T>
-using remove_reference_t = typename std::remove_reference<T>::type;
-template <typename T>
-using remove_const_t = typename std::remove_const<T>::type;
-template <typename T>
-using remove_cvref_t = typename std::remove_cv<remove_reference_t<T>>::type;
-template <typename T> struct type_identity {
-  using type = T;
-};
-template <typename T> using type_identity_t = typename type_identity<T>::type;
-template <typename T>
-using underlying_t = typename std::underlying_type<T>::type;
-
-// Checks whether T is a container with contiguous storage.
-template <typename T> struct is_contiguous : std::false_type {};
-template <typename Char>
-struct is_contiguous<std::basic_string<Char>> : std::true_type {};
-
-struct monostate {
-  constexpr monostate() {}
-};
-
-// An enable_if helper to be used in template parameters which results in much
-// shorter symbols: https://godbolt.org/z/sWw4vP. Extra parentheses are needed
-// to workaround a bug in MSVC 2019 (see #1140 and #1186).
-#ifdef FMT_DOC
-#  define FMT_ENABLE_IF(...)
-#else
-#  define FMT_ENABLE_IF(...) fmt::enable_if_t<(__VA_ARGS__), int> = 0
-#endif
-
-// This is defined in core.h instead of format.h to avoid injecting in std.
-// It is a template to avoid undesirable implicit conversions to std::byte.
-#ifdef __cpp_lib_byte
-template <typename T, FMT_ENABLE_IF(std::is_same<T, std::byte>::value)>
-inline auto format_as(T b) -> unsigned char {
-  return static_cast<unsigned char>(b);
-}
-#endif
-
-namespace detail {
-// Suppresses "unused variable" warnings with the method described in
-// https://herbsutter.com/2009/10/18/mailbag-shutting-up-compiler-warnings/.
-// (void)var does not work on many Intel compilers.
-template <typename... T> FMT_CONSTEXPR void ignore_unused(const T&...) {}
-
-constexpr FMT_INLINE auto is_constant_evaluated(
-    bool default_value = false) noexcept -> bool {
-// Workaround for incompatibility between libstdc++ consteval-based
-// std::is_constant_evaluated() implementation and clang-14.
-// https://github.com/fmtlib/fmt/issues/3247
-#if FMT_CPLUSPLUS >= 202002L && defined(_GLIBCXX_RELEASE) && \
-    _GLIBCXX_RELEASE >= 12 &&                                \
-    (FMT_CLANG_VERSION >= 1400 && FMT_CLANG_VERSION < 1500)
-  ignore_unused(default_value);
-  return __builtin_is_constant_evaluated();
-#elif defined(__cpp_lib_is_constant_evaluated)
-  ignore_unused(default_value);
-  return std::is_constant_evaluated();
-#else
-  return default_value;
-#endif
-}
-
-// Suppresses "conditional expression is constant" warnings.
-template <typename T> constexpr FMT_INLINE auto const_check(T value) -> T {
-  return value;
-}
-
-FMT_NORETURN FMT_API void assert_fail(const char* file, int line,
-                                      const char* message);
-
-#ifndef FMT_ASSERT
-#  ifdef NDEBUG
-// FMT_ASSERT is not empty to avoid -Wempty-body.
-#    define FMT_ASSERT(condition, message) \
-      fmt::detail::ignore_unused((condition), (message))
-#  else
-#    define FMT_ASSERT(condition, message)                                    \
-      ((condition) /* void() fails with -Winvalid-constexpr on clang 4.0.1 */ \
-           ? (void)0                                                          \
-           : fmt::detail::assert_fail(__FILE__, __LINE__, (message)))
-#  endif
-#endif
-
-#if defined(FMT_USE_STRING_VIEW)
-template <typename Char> using std_string_view = std::basic_string_view<Char>;
-#elif defined(FMT_USE_EXPERIMENTAL_STRING_VIEW)
-template <typename Char>
-using std_string_view = std::experimental::basic_string_view<Char>;
-#else
-template <typename T> struct std_string_view {};
-#endif
-
-#ifdef FMT_USE_INT128
-// Do nothing.
-#elif defined(__SIZEOF_INT128__) && !defined(__NVCC__) && \
-    !(FMT_CLANG_VERSION && FMT_MSC_VERSION)
-#  define FMT_USE_INT128 1
-using int128_opt = __int128_t;  // An optional native 128-bit integer.
-using uint128_opt = __uint128_t;
-template <typename T> inline auto convert_for_visit(T value) -> T {
-  return value;
-}
-#else
-#  define FMT_USE_INT128 0
-#endif
-#if !FMT_USE_INT128
-enum class int128_opt {};
-enum class uint128_opt {};
-// Reduce template instantiations.
-template <typename T> auto convert_for_visit(T) -> monostate { return {}; }
-#endif
-
-// Casts a nonnegative integer to unsigned.
-template <typename Int>
-FMT_CONSTEXPR auto to_unsigned(Int value) ->
-    typename std::make_unsigned<Int>::type {
-  FMT_ASSERT(std::is_unsigned<Int>::value || value >= 0, "negative value");
-  return static_cast<typename std::make_unsigned<Int>::type>(value);
-}
-
-FMT_CONSTEXPR inline auto is_utf8() -> bool {
-  FMT_MSC_WARNING(suppress : 4566) constexpr unsigned char section[] = "\u00A7";
-
-  // Avoid buggy sign extensions in MSVC's constant evaluation mode (#2297).
-  using uchar = unsigned char;
-  return FMT_UNICODE || (sizeof(section) == 3 && uchar(section[0]) == 0xC2 &&
-                         uchar(section[1]) == 0xA7);
-}
-}  // namespace detail
-
-/**
-  An implementation of ``std::basic_string_view`` for pre-C++17. It provides a
-  subset of the API. ``fmt::basic_string_view`` is used for format strings even
-  if ``std::string_view`` is available to prevent issues when a library is
-  compiled with a different ``-std`` option than the client code (which is not
-  recommended).
- */
-FMT_EXPORT
-template <typename Char> class basic_string_view {
- private:
-  const Char* data_;
-  size_t size_;
-
- public:
-  using value_type = Char;
-  using iterator = const Char*;
-
-  constexpr basic_string_view() noexcept : data_(nullptr), size_(0) {}
-
-  /** Constructs a string reference object from a C string and a size. */
-  constexpr basic_string_view(const Char* s, size_t count) noexcept
-      : data_(s), size_(count) {}
-
-  /**
-    \rst
-    Constructs a string reference object from a C string computing
-    the size with ``std::char_traits<Char>::length``.
-    \endrst
-   */
-  FMT_CONSTEXPR_CHAR_TRAITS
-  FMT_INLINE
-  basic_string_view(const Char* s)
-      : data_(s),
-        size_(detail::const_check(std::is_same<Char, char>::value &&
-                                  !detail::is_constant_evaluated(true))
-                  ? std::strlen(reinterpret_cast<const char*>(s))
-                  : std::char_traits<Char>::length(s)) {}
-
-  /** Constructs a string reference from a ``std::basic_string`` object. */
-  template <typename Traits, typename Alloc>
-  FMT_CONSTEXPR basic_string_view(
-      const std::basic_string<Char, Traits, Alloc>& s) noexcept
-      : data_(s.data()), size_(s.size()) {}
-
-  template <typename S, FMT_ENABLE_IF(std::is_same<
-                                      S, detail::std_string_view<Char>>::value)>
-  FMT_CONSTEXPR basic_string_view(S s) noexcept
-      : data_(s.data()), size_(s.size()) {}
-
-  /** Returns a pointer to the string data. */
-  constexpr auto data() const noexcept -> const Char* { return data_; }
-
-  /** Returns the string size. */
-  constexpr auto size() const noexcept -> size_t { return size_; }
-
-  constexpr auto begin() const noexcept -> iterator { return data_; }
-  constexpr auto end() const noexcept -> iterator { return data_ + size_; }
-
-  constexpr auto operator[](size_t pos) const noexcept -> const Char& {
-    return data_[pos];
-  }
-
-  FMT_CONSTEXPR void remove_prefix(size_t n) noexcept {
-    data_ += n;
-    size_ -= n;
-  }
-
-  FMT_CONSTEXPR_CHAR_TRAITS auto starts_with(
-      basic_string_view<Char> sv) const noexcept -> bool {
-    return size_ >= sv.size_ &&
-           std::char_traits<Char>::compare(data_, sv.data_, sv.size_) == 0;
-  }
-  FMT_CONSTEXPR_CHAR_TRAITS auto starts_with(Char c) const noexcept -> bool {
-    return size_ >= 1 && std::char_traits<Char>::eq(*data_, c);
-  }
-  FMT_CONSTEXPR_CHAR_TRAITS auto starts_with(const Char* s) const -> bool {
-    return starts_with(basic_string_view<Char>(s));
-  }
-
-  // Lexicographically compare this string reference to other.
-  FMT_CONSTEXPR_CHAR_TRAITS auto compare(basic_string_view other) const -> int {
-    size_t str_size = size_ < other.size_ ? size_ : other.size_;
-    int result = std::char_traits<Char>::compare(data_, other.data_, str_size);
-    if (result == 0)
-      result = size_ == other.size_ ? 0 : (size_ < other.size_ ? -1 : 1);
-    return result;
-  }
-
-  FMT_CONSTEXPR_CHAR_TRAITS friend auto operator==(basic_string_view lhs,
-                                                   basic_string_view rhs)
-      -> bool {
-    return lhs.compare(rhs) == 0;
-  }
-  friend auto operator!=(basic_string_view lhs, basic_string_view rhs) -> bool {
-    return lhs.compare(rhs) != 0;
-  }
-  friend auto operator<(basic_string_view lhs, basic_string_view rhs) -> bool {
-    return lhs.compare(rhs) < 0;
-  }
-  friend auto operator<=(basic_string_view lhs, basic_string_view rhs) -> bool {
-    return lhs.compare(rhs) <= 0;
-  }
-  friend auto operator>(basic_string_view lhs, basic_string_view rhs) -> bool {
-    return lhs.compare(rhs) > 0;
-  }
-  friend auto operator>=(basic_string_view lhs, basic_string_view rhs) -> bool {
-    return lhs.compare(rhs) >= 0;
-  }
-};
-
-FMT_EXPORT
-using string_view = basic_string_view<char>;
-
-/** Specifies if ``T`` is a character type. Can be specialized by users. */
-FMT_EXPORT
-template <typename T> struct is_char : std::false_type {};
-template <> struct is_char<char> : std::true_type {};
-
-namespace detail {
-
-// A base class for compile-time strings.
-struct compile_string {};
-
-template <typename S>
-struct is_compile_string : std::is_base_of<compile_string, S> {};
-
-template <typename Char, FMT_ENABLE_IF(is_char<Char>::value)>
-FMT_INLINE auto to_string_view(const Char* s) -> basic_string_view<Char> {
-  return s;
-}
-template <typename Char, typename Traits, typename Alloc>
-inline auto to_string_view(const std::basic_string<Char, Traits, Alloc>& s)
-    -> basic_string_view<Char> {
-  return s;
-}
-template <typename Char>
-constexpr auto to_string_view(basic_string_view<Char> s)
-    -> basic_string_view<Char> {
-  return s;
-}
-template <typename Char,
-          FMT_ENABLE_IF(!std::is_empty<std_string_view<Char>>::value)>
-inline auto to_string_view(std_string_view<Char> s) -> basic_string_view<Char> {
-  return s;
-}
-template <typename S, FMT_ENABLE_IF(is_compile_string<S>::value)>
-constexpr auto to_string_view(const S& s)
-    -> basic_string_view<typename S::char_type> {
-  return basic_string_view<typename S::char_type>(s);
-}
-void to_string_view(...);
-
-// Specifies whether S is a string type convertible to fmt::basic_string_view.
-// It should be a constexpr function but MSVC 2017 fails to compile it in
-// enable_if and MSVC 2015 fails to compile it as an alias template.
-// ADL is intentionally disabled as to_string_view is not an extension point.
-template <typename S>
-struct is_string
-    : std::is_class<decltype(detail::to_string_view(std::declval<S>()))> {};
-
-template <typename S, typename = void> struct char_t_impl {};
-template <typename S> struct char_t_impl<S, enable_if_t<is_string<S>::value>> {
-  using result = decltype(to_string_view(std::declval<S>()));
-  using type = typename result::value_type;
-};
-
-enum class type {
-  none_type,
-  // Integer types should go first,
-  int_type,
-  uint_type,
-  long_long_type,
-  ulong_long_type,
-  int128_type,
-  uint128_type,
-  bool_type,
-  char_type,
-  last_integer_type = char_type,
-  // followed by floating-point types.
-  float_type,
-  double_type,
-  long_double_type,
-  last_numeric_type = long_double_type,
-  cstring_type,
-  string_type,
-  pointer_type,
-  custom_type
-};
-
-// Maps core type T to the corresponding type enum constant.
-template <typename T, typename Char>
-struct type_constant : std::integral_constant<type, type::custom_type> {};
-
-#define FMT_TYPE_CONSTANT(Type, constant) \
-  template <typename Char>                \
-  struct type_constant<Type, Char>        \
-      : std::integral_constant<type, type::constant> {}
-
-FMT_TYPE_CONSTANT(int, int_type);
-FMT_TYPE_CONSTANT(unsigned, uint_type);
-FMT_TYPE_CONSTANT(long long, long_long_type);
-FMT_TYPE_CONSTANT(unsigned long long, ulong_long_type);
-FMT_TYPE_CONSTANT(int128_opt, int128_type);
-FMT_TYPE_CONSTANT(uint128_opt, uint128_type);
-FMT_TYPE_CONSTANT(bool, bool_type);
-FMT_TYPE_CONSTANT(Char, char_type);
-FMT_TYPE_CONSTANT(float, float_type);
-FMT_TYPE_CONSTANT(double, double_type);
-FMT_TYPE_CONSTANT(long double, long_double_type);
-FMT_TYPE_CONSTANT(const Char*, cstring_type);
-FMT_TYPE_CONSTANT(basic_string_view<Char>, string_type);
-FMT_TYPE_CONSTANT(const void*, pointer_type);
-
-constexpr auto is_integral_type(type t) -> bool {
-  return t > type::none_type && t <= type::last_integer_type;
-}
-constexpr auto is_arithmetic_type(type t) -> bool {
-  return t > type::none_type && t <= type::last_numeric_type;
-}
-
-constexpr auto set(type rhs) -> int { return 1 << static_cast<int>(rhs); }
-constexpr auto in(type t, int set) -> bool {
-  return ((set >> static_cast<int>(t)) & 1) != 0;
-}
-
-// Bitsets of types.
-enum {
-  sint_set =
-      set(type::int_type) | set(type::long_long_type) | set(type::int128_type),
-  uint_set = set(type::uint_type) | set(type::ulong_long_type) |
-             set(type::uint128_type),
-  bool_set = set(type::bool_type),
-  char_set = set(type::char_type),
-  float_set = set(type::float_type) | set(type::double_type) |
-              set(type::long_double_type),
-  string_set = set(type::string_type),
-  cstring_set = set(type::cstring_type),
-  pointer_set = set(type::pointer_type)
-};
-
-// DEPRECATED!
-FMT_NORETURN FMT_API void throw_format_error(const char* message);
-
-struct error_handler {
-  constexpr error_handler() = default;
-
-  // This function is intentionally not constexpr to give a compile-time error.
-  FMT_NORETURN void on_error(const char* message) {
-    throw_format_error(message);
-  }
-};
-}  // namespace detail
-
-/** Throws ``format_error`` with a given message. */
-using detail::throw_format_error;
-
-/** String's character type. */
-template <typename S> using char_t = typename detail::char_t_impl<S>::type;
-
-/**
-  \rst
-  Parsing context consisting of a format string range being parsed and an
-  argument counter for automatic indexing.
-  You can use the ``format_parse_context`` type alias for ``char`` instead.
-  \endrst
- */
-FMT_EXPORT
-template <typename Char> class basic_format_parse_context {
- private:
-  basic_string_view<Char> format_str_;
-  int next_arg_id_;
-
-  FMT_CONSTEXPR void do_check_arg_id(int id);
-
- public:
-  using char_type = Char;
-  using iterator = const Char*;
-
-  explicit constexpr basic_format_parse_context(
-      basic_string_view<Char> format_str, int next_arg_id = 0)
-      : format_str_(format_str), next_arg_id_(next_arg_id) {}
-
-  /**
-    Returns an iterator to the beginning of the format string range being
-    parsed.
-   */
-  constexpr auto begin() const noexcept -> iterator {
-    return format_str_.begin();
-  }
-
-  /**
-    Returns an iterator past the end of the format string range being parsed.
-   */
-  constexpr auto end() const noexcept -> iterator { return format_str_.end(); }
-
-  /** Advances the begin iterator to ``it``. */
-  FMT_CONSTEXPR void advance_to(iterator it) {
-    format_str_.remove_prefix(detail::to_unsigned(it - begin()));
-  }
-
-  /**
-    Reports an error if using the manual argument indexing; otherwise returns
-    the next argument index and switches to the automatic indexing.
-   */
-  FMT_CONSTEXPR auto next_arg_id() -> int {
-    if (next_arg_id_ < 0) {
-      detail::throw_format_error(
-          "cannot switch from manual to automatic argument indexing");
-      return 0;
-    }
-    int id = next_arg_id_++;
-    do_check_arg_id(id);
-    return id;
-  }
-
-  /**
-    Reports an error if using the automatic argument indexing; otherwise
-    switches to the manual indexing.
-   */
-  FMT_CONSTEXPR void check_arg_id(int id) {
-    if (next_arg_id_ > 0) {
-      detail::throw_format_error(
-          "cannot switch from automatic to manual argument indexing");
-      return;
-    }
-    next_arg_id_ = -1;
-    do_check_arg_id(id);
-  }
-  FMT_CONSTEXPR void check_arg_id(basic_string_view<Char>) {}
-  FMT_CONSTEXPR void check_dynamic_spec(int arg_id);
-};
-
-FMT_EXPORT
-using format_parse_context = basic_format_parse_context<char>;
-
-namespace detail {
-// A parse context with extra data used only in compile-time checks.
-template <typename Char>
-class compile_parse_context : public basic_format_parse_context<Char> {
- private:
-  int num_args_;
-  const type* types_;
-  using base = basic_format_parse_context<Char>;
-
- public:
-  explicit FMT_CONSTEXPR compile_parse_context(
-      basic_string_view<Char> format_str, int num_args, const type* types,
-      int next_arg_id = 0)
-      : base(format_str, next_arg_id), num_args_(num_args), types_(types) {}
-
-  constexpr auto num_args() const -> int { return num_args_; }
-  constexpr auto arg_type(int id) const -> type { return types_[id]; }
-
-  FMT_CONSTEXPR auto next_arg_id() -> int {
-    int id = base::next_arg_id();
-    if (id >= num_args_) throw_format_error("argument not found");
-    return id;
-  }
-
-  FMT_CONSTEXPR void check_arg_id(int id) {
-    base::check_arg_id(id);
-    if (id >= num_args_) throw_format_error("argument not found");
-  }
-  using base::check_arg_id;
-
-  FMT_CONSTEXPR void check_dynamic_spec(int arg_id) {
-    detail::ignore_unused(arg_id);
-#if !defined(__LCC__)
-    if (arg_id < num_args_ && types_ && !is_integral_type(types_[arg_id]))
-      throw_format_error("width/precision is not integer");
-#endif
-  }
-};
-
-// Extracts a reference to the container from back_insert_iterator.
-template <typename Container>
-inline auto get_container(std::back_insert_iterator<Container> it)
-    -> Container& {
-  using base = std::back_insert_iterator<Container>;
-  struct accessor : base {
-    accessor(base b) : base(b) {}
-    using base::container;
-  };
-  return *accessor(it).container;
-}
-
-template <typename Char, typename InputIt, typename OutputIt>
-FMT_CONSTEXPR auto copy_str(InputIt begin, InputIt end, OutputIt out)
-    -> OutputIt {
-  while (begin != end) *out++ = static_cast<Char>(*begin++);
-  return out;
-}
-
-template <typename Char, typename T, typename U,
-          FMT_ENABLE_IF(
-              std::is_same<remove_const_t<T>, U>::value&& is_char<U>::value)>
-FMT_CONSTEXPR auto copy_str(T* begin, T* end, U* out) -> U* {
-  if (is_constant_evaluated()) return copy_str<Char, T*, U*>(begin, end, out);
-  auto size = to_unsigned(end - begin);
-  if (size > 0) memcpy(out, begin, size * sizeof(U));
-  return out + size;
-}
-
-/**
-  \rst
-  A contiguous memory buffer with an optional growing ability. It is an internal
-  class and shouldn't be used directly, only via `~fmt::basic_memory_buffer`.
-  \endrst
- */
-template <typename T> class buffer {
- private:
-  T* ptr_;
-  size_t size_;
-  size_t capacity_;
-
- protected:
-  // Don't initialize ptr_ since it is not accessed to save a few cycles.
-  FMT_MSC_WARNING(suppress : 26495)
-  FMT_CONSTEXPR buffer(size_t sz) noexcept : size_(sz), capacity_(sz) {}
-
-  FMT_CONSTEXPR20 buffer(T* p = nullptr, size_t sz = 0, size_t cap = 0) noexcept
-      : ptr_(p), size_(sz), capacity_(cap) {}
-
-  FMT_CONSTEXPR20 ~buffer() = default;
-  buffer(buffer&&) = default;
-
-  /** Sets the buffer data and capacity. */
-  FMT_CONSTEXPR void set(T* buf_data, size_t buf_capacity) noexcept {
-    ptr_ = buf_data;
-    capacity_ = buf_capacity;
-  }
-
-  /** Increases the buffer capacity to hold at least *capacity* elements. */
-  // DEPRECATED!
-  virtual FMT_CONSTEXPR20 void grow(size_t capacity) = 0;
-
- public:
-  using value_type = T;
-  using const_reference = const T&;
-
-  buffer(const buffer&) = delete;
-  void operator=(const buffer&) = delete;
-
-  FMT_INLINE auto begin() noexcept -> T* { return ptr_; }
-  FMT_INLINE auto end() noexcept -> T* { return ptr_ + size_; }
-
-  FMT_INLINE auto begin() const noexcept -> const T* { return ptr_; }
-  FMT_INLINE auto end() const noexcept -> const T* { return ptr_ + size_; }
-
-  /** Returns the size of this buffer. */
-  constexpr auto size() const noexcept -> size_t { return size_; }
-
-  /** Returns the capacity of this buffer. */
-  constexpr auto capacity() const noexcept -> size_t { return capacity_; }
-
-  /** Returns a pointer to the buffer data (not null-terminated). */
-  FMT_CONSTEXPR auto data() noexcept -> T* { return ptr_; }
-  FMT_CONSTEXPR auto data() const noexcept -> const T* { return ptr_; }
-
-  /** Clears this buffer. */
-  void clear() { size_ = 0; }
-
-  // Tries resizing the buffer to contain *count* elements. If T is a POD type
-  // the new elements may not be initialized.
-  FMT_CONSTEXPR20 void try_resize(size_t count) {
-    try_reserve(count);
-    size_ = count <= capacity_ ? count : capacity_;
-  }
-
-  // Tries increasing the buffer capacity to *new_capacity*. It can increase the
-  // capacity by a smaller amount than requested but guarantees there is space
-  // for at least one additional element either by increasing the capacity or by
-  // flushing the buffer if it is full.
-  FMT_CONSTEXPR20 void try_reserve(size_t new_capacity) {
-    if (new_capacity > capacity_) grow(new_capacity);
-  }
-
-  FMT_CONSTEXPR20 void push_back(const T& value) {
-    try_reserve(size_ + 1);
-    ptr_[size_++] = value;
-  }
-
-  /** Appends data to the end of the buffer. */
-  template <typename U> void append(const U* begin, const U* end);
-
-  template <typename Idx> FMT_CONSTEXPR auto operator[](Idx index) -> T& {
-    return ptr_[index];
-  }
-  template <typename Idx>
-  FMT_CONSTEXPR auto operator[](Idx index) const -> const T& {
-    return ptr_[index];
-  }
-};
-
-struct buffer_traits {
-  explicit buffer_traits(size_t) {}
-  auto count() const -> size_t { return 0; }
-  auto limit(size_t size) -> size_t { return size; }
-};
-
-class fixed_buffer_traits {
- private:
-  size_t count_ = 0;
-  size_t limit_;
-
- public:
-  explicit fixed_buffer_traits(size_t limit) : limit_(limit) {}
-  auto count() const -> size_t { return count_; }
-  auto limit(size_t size) -> size_t {
-    size_t n = limit_ > count_ ? limit_ - count_ : 0;
-    count_ += size;
-    return size < n ? size : n;
-  }
-};
-
-// A buffer that writes to an output iterator when flushed.
-template <typename OutputIt, typename T, typename Traits = buffer_traits>
-class iterator_buffer final : public Traits, public buffer<T> {
- private:
-  OutputIt out_;
-  enum { buffer_size = 256 };
-  T data_[buffer_size];
-
- protected:
-  FMT_CONSTEXPR20 void grow(size_t) override {
-    if (this->size() == buffer_size) flush();
-  }
-
-  void flush() {
-    auto size = this->size();
-    this->clear();
-    out_ = copy_str<T>(data_, data_ + this->limit(size), out_);
-  }
-
- public:
-  explicit iterator_buffer(OutputIt out, size_t n = buffer_size)
-      : Traits(n), buffer<T>(data_, 0, buffer_size), out_(out) {}
-  iterator_buffer(iterator_buffer&& other)
-      : Traits(other), buffer<T>(data_, 0, buffer_size), out_(other.out_) {}
-  ~iterator_buffer() { flush(); }
-
-  auto out() -> OutputIt {
-    flush();
-    return out_;
-  }
-  auto count() const -> size_t { return Traits::count() + this->size(); }
-};
-
-template <typename T>
-class iterator_buffer<T*, T, fixed_buffer_traits> final
-    : public fixed_buffer_traits,
-      public buffer<T> {
- private:
-  T* out_;
-  enum { buffer_size = 256 };
-  T data_[buffer_size];
-
- protected:
-  FMT_CONSTEXPR20 void grow(size_t) override {
-    if (this->size() == this->capacity()) flush();
-  }
-
-  void flush() {
-    size_t n = this->limit(this->size());
-    if (this->data() == out_) {
-      out_ += n;
-      this->set(data_, buffer_size);
-    }
-    this->clear();
-  }
-
- public:
-  explicit iterator_buffer(T* out, size_t n = buffer_size)
-      : fixed_buffer_traits(n), buffer<T>(out, 0, n), out_(out) {}
-  iterator_buffer(iterator_buffer&& other)
-      : fixed_buffer_traits(other),
-        buffer<T>(std::move(other)),
-        out_(other.out_) {
-    if (this->data() != out_) {
-      this->set(data_, buffer_size);
-      this->clear();
-    }
-  }
-  ~iterator_buffer() { flush(); }
-
-  auto out() -> T* {
-    flush();
-    return out_;
-  }
-  auto count() const -> size_t {
-    return fixed_buffer_traits::count() + this->size();
-  }
-};
-
-template <typename T> class iterator_buffer<T*, T> final : public buffer<T> {
- protected:
-  FMT_CONSTEXPR20 void grow(size_t) override {}
-
- public:
-  explicit iterator_buffer(T* out, size_t = 0) : buffer<T>(out, 0, ~size_t()) {}
-
-  auto out() -> T* { return &*this->end(); }
-};
-
-// A buffer that writes to a container with the contiguous storage.
-template <typename Container>
-class iterator_buffer<std::back_insert_iterator<Container>,
-                      enable_if_t<is_contiguous<Container>::value,
-                                  typename Container::value_type>>
-    final : public buffer<typename Container::value_type> {
- private:
-  Container& container_;
-
- protected:
-  FMT_CONSTEXPR20 void grow(size_t capacity) override {
-    container_.resize(capacity);
-    this->set(&container_[0], capacity);
-  }
-
- public:
-  explicit iterator_buffer(Container& c)
-      : buffer<typename Container::value_type>(c.size()), container_(c) {}
-  explicit iterator_buffer(std::back_insert_iterator<Container> out, size_t = 0)
-      : iterator_buffer(get_container(out)) {}
-
-  auto out() -> std::back_insert_iterator<Container> {
-    return std::back_inserter(container_);
-  }
-};
-
-// A buffer that counts the number of code units written discarding the output.
-template <typename T = char> class counting_buffer final : public buffer<T> {
- private:
-  enum { buffer_size = 256 };
-  T data_[buffer_size];
-  size_t count_ = 0;
-
- protected:
-  FMT_CONSTEXPR20 void grow(size_t) override {
-    if (this->size() != buffer_size) return;
-    count_ += this->size();
-    this->clear();
-  }
-
- public:
-  counting_buffer() : buffer<T>(data_, 0, buffer_size) {}
-
-  auto count() -> size_t { return count_ + this->size(); }
-};
-}  // namespace detail
-
-template <typename Char>
-FMT_CONSTEXPR void basic_format_parse_context<Char>::do_check_arg_id(int id) {
-  // Argument id is only checked at compile-time during parsing because
-  // formatting has its own validation.
-  if (detail::is_constant_evaluated() &&
-      (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) {
-    using context = detail::compile_parse_context<Char>;
-    if (id >= static_cast<context*>(this)->num_args())
-      detail::throw_format_error("argument not found");
-  }
-}
-
-template <typename Char>
-FMT_CONSTEXPR void basic_format_parse_context<Char>::check_dynamic_spec(
-    int arg_id) {
-  if (detail::is_constant_evaluated() &&
-      (!FMT_GCC_VERSION || FMT_GCC_VERSION >= 1200)) {
-    using context = detail::compile_parse_context<Char>;
-    static_cast<context*>(this)->check_dynamic_spec(arg_id);
-  }
-}
-
-FMT_EXPORT template <typename Context> class basic_format_arg;
-FMT_EXPORT template <typename Context> class basic_format_args;
-FMT_EXPORT template <typename Context> class dynamic_format_arg_store;
-
-// A formatter for objects of type T.
-FMT_EXPORT
-template <typename T, typename Char = char, typename Enable = void>
-struct formatter {
-  // A deleted default constructor indicates a disabled formatter.
-  formatter() = delete;
-};
-
-// Specifies if T has an enabled formatter specialization. A type can be
-// formattable even if it doesn't have a formatter e.g. via a conversion.
-template <typename T, typename Context>
-using has_formatter =
-    std::is_constructible<typename Context::template formatter_type<T>>;
-
-// An output iterator that appends to a buffer.
-// It is used to reduce symbol sizes for the common case.
-class appender : public std::back_insert_iterator<detail::buffer<char>> {
-  using base = std::back_insert_iterator<detail::buffer<char>>;
-
- public:
-  using std::back_insert_iterator<detail::buffer<char>>::back_insert_iterator;
-  appender(base it) noexcept : base(it) {}
-  FMT_UNCHECKED_ITERATOR(appender);
-
-  auto operator++() noexcept -> appender& { return *this; }
-  auto operator++(int) noexcept -> appender { return *this; }
-};
-
-namespace detail {
-
-template <typename Context, typename T>
-constexpr auto has_const_formatter_impl(T*)
-    -> decltype(typename Context::template formatter_type<T>().format(
-                    std::declval<const T&>(), std::declval<Context&>()),
-                true) {
-  return true;
-}
-template <typename Context>
-constexpr auto has_const_formatter_impl(...) -> bool {
-  return false;
-}
-template <typename T, typename Context>
-constexpr auto has_const_formatter() -> bool {
-  return has_const_formatter_impl<Context>(static_cast<T*>(nullptr));
-}
-
-template <typename T>
-using buffer_appender = conditional_t<std::is_same<T, char>::value, appender,
-                                      std::back_insert_iterator<buffer<T>>>;
-
-// Maps an output iterator to a buffer.
-template <typename T, typename OutputIt>
-auto get_buffer(OutputIt out) -> iterator_buffer<OutputIt, T> {
-  return iterator_buffer<OutputIt, T>(out);
-}
-template <typename T, typename Buf,
-          FMT_ENABLE_IF(std::is_base_of<buffer<char>, Buf>::value)>
-auto get_buffer(std::back_insert_iterator<Buf> out) -> buffer<char>& {
-  return get_container(out);
-}
-
-template <typename Buf, typename OutputIt>
-FMT_INLINE auto get_iterator(Buf& buf, OutputIt) -> decltype(buf.out()) {
-  return buf.out();
-}
-template <typename T, typename OutputIt>
-auto get_iterator(buffer<T>&, OutputIt out) -> OutputIt {
-  return out;
-}
-
-struct view {};
-
-template <typename Char, typename T> struct named_arg : view {
-  const Char* name;
-  const T& value;
-  named_arg(const Char* n, const T& v) : name(n), value(v) {}
-};
-
-template <typename Char> struct named_arg_info {
-  const Char* name;
-  int id;
-};
-
-template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
-struct arg_data {
-  // args_[0].named_args points to named_args_ to avoid bloating format_args.
-  // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
-  T args_[1 + (NUM_ARGS != 0 ? NUM_ARGS : +1)];
-  named_arg_info<Char> named_args_[NUM_NAMED_ARGS];
-
-  template <typename... U>
-  arg_data(const U&... init) : args_{T(named_args_, NUM_NAMED_ARGS), init...} {}
-  arg_data(const arg_data& other) = delete;
-  auto args() const -> const T* { return args_ + 1; }
-  auto named_args() -> named_arg_info<Char>* { return named_args_; }
-};
-
-template <typename T, typename Char, size_t NUM_ARGS>
-struct arg_data<T, Char, NUM_ARGS, 0> {
-  // +1 to workaround a bug in gcc 7.5 that causes duplicated-branches warning.
-  T args_[NUM_ARGS != 0 ? NUM_ARGS : +1];
-
-  template <typename... U>
-  FMT_CONSTEXPR FMT_INLINE arg_data(const U&... init) : args_{init...} {}
-  FMT_CONSTEXPR FMT_INLINE auto args() const -> const T* { return args_; }
-  FMT_CONSTEXPR FMT_INLINE auto named_args() -> std::nullptr_t {
-    return nullptr;
-  }
-};
-
-template <typename Char>
-inline void init_named_args(named_arg_info<Char>*, int, int) {}
-
-template <typename T> struct is_named_arg : std::false_type {};
-template <typename T> struct is_statically_named_arg : std::false_type {};
-
-template <typename T, typename Char>
-struct is_named_arg<named_arg<Char, T>> : std::true_type {};
-
-template <typename Char, typename T, typename... Tail,
-          FMT_ENABLE_IF(!is_named_arg<T>::value)>
-void init_named_args(named_arg_info<Char>* named_args, int arg_count,
-                     int named_arg_count, const T&, const Tail&... args) {
-  init_named_args(named_args, arg_count + 1, named_arg_count, args...);
-}
-
-template <typename Char, typename T, typename... Tail,
-          FMT_ENABLE_IF(is_named_arg<T>::value)>
-void init_named_args(named_arg_info<Char>* named_args, int arg_count,
-                     int named_arg_count, const T& arg, const Tail&... args) {
-  named_args[named_arg_count++] = {arg.name, arg_count};
-  init_named_args(named_args, arg_count + 1, named_arg_count, args...);
-}
-
-template <typename... Args>
-FMT_CONSTEXPR FMT_INLINE void init_named_args(std::nullptr_t, int, int,
-                                              const Args&...) {}
-
-template <bool B = false> constexpr auto count() -> size_t { return B ? 1 : 0; }
-template <bool B1, bool B2, bool... Tail> constexpr auto count() -> size_t {
-  return (B1 ? 1 : 0) + count<B2, Tail...>();
-}
-
-template <typename... Args> constexpr auto count_named_args() -> size_t {
-  return count<is_named_arg<Args>::value...>();
-}
-
-template <typename... Args>
-constexpr auto count_statically_named_args() -> size_t {
-  return count<is_statically_named_arg<Args>::value...>();
-}
-
-struct unformattable {};
-struct unformattable_char : unformattable {};
-struct unformattable_pointer : unformattable {};
-
-template <typename Char> struct string_value {
-  const Char* data;
-  size_t size;
-};
-
-template <typename Char> struct named_arg_value {
-  const named_arg_info<Char>* data;
-  size_t size;
-};
-
-template <typename Context> struct custom_value {
-  using parse_context = typename Context::parse_context_type;
-  void* value;
-  void (*format)(void* arg, parse_context& parse_ctx, Context& ctx);
-};
-
-// A formatting argument value.
-template <typename Context> class value {
- public:
-  using char_type = typename Context::char_type;
-
-  union {
-    monostate no_value;
-    int int_value;
-    unsigned uint_value;
-    long long long_long_value;
-    unsigned long long ulong_long_value;
-    int128_opt int128_value;
-    uint128_opt uint128_value;
-    bool bool_value;
-    char_type char_value;
-    float float_value;
-    double double_value;
-    long double long_double_value;
-    const void* pointer;
-    string_value<char_type> string;
-    custom_value<Context> custom;
-    named_arg_value<char_type> named_args;
-  };
-
-  constexpr FMT_INLINE value() : no_value() {}
-  constexpr FMT_INLINE value(int val) : int_value(val) {}
-  constexpr FMT_INLINE value(unsigned val) : uint_value(val) {}
-  constexpr FMT_INLINE value(long long val) : long_long_value(val) {}
-  constexpr FMT_INLINE value(unsigned long long val) : ulong_long_value(val) {}
-  FMT_INLINE value(int128_opt val) : int128_value(val) {}
-  FMT_INLINE value(uint128_opt val) : uint128_value(val) {}
-  constexpr FMT_INLINE value(float val) : float_value(val) {}
-  constexpr FMT_INLINE value(double val) : double_value(val) {}
-  FMT_INLINE value(long double val) : long_double_value(val) {}
-  constexpr FMT_INLINE value(bool val) : bool_value(val) {}
-  constexpr FMT_INLINE value(char_type val) : char_value(val) {}
-  FMT_CONSTEXPR FMT_INLINE value(const char_type* val) {
-    string.data = val;
-    if (is_constant_evaluated()) string.size = {};
-  }
-  FMT_CONSTEXPR FMT_INLINE value(basic_string_view<char_type> val) {
-    string.data = val.data();
-    string.size = val.size();
-  }
-  FMT_INLINE value(const void* val) : pointer(val) {}
-  FMT_INLINE value(const named_arg_info<char_type>* args, size_t size)
-      : named_args{args, size} {}
-
-  template <typename T> FMT_CONSTEXPR20 FMT_INLINE value(T& val) {
-    using value_type = remove_const_t<T>;
-    custom.value = const_cast<value_type*>(std::addressof(val));
-    // Get the formatter type through the context to allow different contexts
-    // have different extension points, e.g. `formatter<T>` for `format` and
-    // `printf_formatter<T>` for `printf`.
-    custom.format = format_custom_arg<
-        value_type, typename Context::template formatter_type<value_type>>;
-  }
-  value(unformattable);
-  value(unformattable_char);
-  value(unformattable_pointer);
-
- private:
-  // Formats an argument of a custom type, such as a user-defined class.
-  template <typename T, typename Formatter>
-  static void format_custom_arg(void* arg,
-                                typename Context::parse_context_type& parse_ctx,
-                                Context& ctx) {
-    auto f = Formatter();
-    parse_ctx.advance_to(f.parse(parse_ctx));
-    using qualified_type =
-        conditional_t<has_const_formatter<T, Context>(), const T, T>;
-    // Calling format through a mutable reference is deprecated.
-    ctx.advance_to(f.format(*static_cast<qualified_type*>(arg), ctx));
-  }
-};
-
-// To minimize the number of types we need to deal with, long is translated
-// either to int or to long long depending on its size.
-enum { long_short = sizeof(long) == sizeof(int) };
-using long_type = conditional_t<long_short, int, long long>;
-using ulong_type = conditional_t<long_short, unsigned, unsigned long long>;
-
-template <typename T> struct format_as_result {
-  template <typename U,
-            FMT_ENABLE_IF(std::is_enum<U>::value || std::is_class<U>::value)>
-  static auto map(U*) -> remove_cvref_t<decltype(format_as(std::declval<U>()))>;
-  static auto map(...) -> void;
-
-  using type = decltype(map(static_cast<T*>(nullptr)));
-};
-template <typename T> using format_as_t = typename format_as_result<T>::type;
-
-template <typename T>
-struct has_format_as
-    : bool_constant<!std::is_same<format_as_t<T>, void>::value> {};
-
-// Maps formatting arguments to core types.
-// arg_mapper reports errors by returning unformattable instead of using
-// static_assert because it's used in the is_formattable trait.
-template <typename Context> struct arg_mapper {
-  using char_type = typename Context::char_type;
-
-  FMT_CONSTEXPR FMT_INLINE auto map(signed char val) -> int { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(unsigned char val) -> unsigned {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(short val) -> int { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(unsigned short val) -> unsigned {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(int val) -> int { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(unsigned val) -> unsigned { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(long val) -> long_type { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(unsigned long val) -> ulong_type {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(long long val) -> long long { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(unsigned long long val)
-      -> unsigned long long {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(int128_opt val) -> int128_opt {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(uint128_opt val) -> uint128_opt {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(bool val) -> bool { return val; }
-
-  template <typename T, FMT_ENABLE_IF(std::is_same<T, char>::value ||
-                                      std::is_same<T, char_type>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(T val) -> char_type {
-    return val;
-  }
-  template <typename T, enable_if_t<(std::is_same<T, wchar_t>::value ||
-#ifdef __cpp_char8_t
-                                     std::is_same<T, char8_t>::value ||
-#endif
-                                     std::is_same<T, char16_t>::value ||
-                                     std::is_same<T, char32_t>::value) &&
-                                        !std::is_same<T, char_type>::value,
-                                    int> = 0>
-  FMT_CONSTEXPR FMT_INLINE auto map(T) -> unformattable_char {
-    return {};
-  }
-
-  FMT_CONSTEXPR FMT_INLINE auto map(float val) -> float { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(double val) -> double { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(long double val) -> long double {
-    return val;
-  }
-
-  FMT_CONSTEXPR FMT_INLINE auto map(char_type* val) -> const char_type* {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(const char_type* val) -> const char_type* {
-    return val;
-  }
-  template <typename T,
-            FMT_ENABLE_IF(is_string<T>::value && !std::is_pointer<T>::value &&
-                          std::is_same<char_type, char_t<T>>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
-      -> basic_string_view<char_type> {
-    return to_string_view(val);
-  }
-  template <typename T,
-            FMT_ENABLE_IF(is_string<T>::value && !std::is_pointer<T>::value &&
-                          !std::is_same<char_type, char_t<T>>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T&) -> unformattable_char {
-    return {};
-  }
-
-  FMT_CONSTEXPR FMT_INLINE auto map(void* val) -> const void* { return val; }
-  FMT_CONSTEXPR FMT_INLINE auto map(const void* val) -> const void* {
-    return val;
-  }
-  FMT_CONSTEXPR FMT_INLINE auto map(std::nullptr_t val) -> const void* {
-    return val;
-  }
-
-  // Use SFINAE instead of a const T* parameter to avoid a conflict with the
-  // array overload.
-  template <
-      typename T,
-      FMT_ENABLE_IF(
-          std::is_pointer<T>::value || std::is_member_pointer<T>::value ||
-          std::is_function<typename std::remove_pointer<T>::type>::value ||
-          (std::is_array<T>::value &&
-           !std::is_convertible<T, const char_type*>::value))>
-  FMT_CONSTEXPR auto map(const T&) -> unformattable_pointer {
-    return {};
-  }
-
-  template <typename T, std::size_t N,
-            FMT_ENABLE_IF(!std::is_same<T, wchar_t>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T (&values)[N]) -> const T (&)[N] {
-    return values;
-  }
-
-  // Only map owning types because mapping views can be unsafe.
-  template <typename T, typename U = format_as_t<T>,
-            FMT_ENABLE_IF(std::is_arithmetic<U>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T& val)
-      -> decltype(FMT_DECLTYPE_THIS map(U())) {
-    return map(format_as(val));
-  }
-
-  template <typename T, typename U = remove_const_t<T>>
-  struct formattable : bool_constant<has_const_formatter<U, Context>() ||
-                                     (has_formatter<U, Context>::value &&
-                                      !std::is_const<T>::value)> {};
-
-  template <typename T, FMT_ENABLE_IF(formattable<T>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto do_map(T& val) -> T& {
-    return val;
-  }
-  template <typename T, FMT_ENABLE_IF(!formattable<T>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto do_map(T&) -> unformattable {
-    return {};
-  }
-
-  template <typename T, typename U = remove_const_t<T>,
-            FMT_ENABLE_IF((std::is_class<U>::value || std::is_enum<U>::value ||
-                           std::is_union<U>::value) &&
-                          !is_string<U>::value && !is_char<U>::value &&
-                          !is_named_arg<U>::value &&
-                          !std::is_arithmetic<format_as_t<U>>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(T& val)
-      -> decltype(FMT_DECLTYPE_THIS do_map(val)) {
-    return do_map(val);
-  }
-
-  template <typename T, FMT_ENABLE_IF(is_named_arg<T>::value)>
-  FMT_CONSTEXPR FMT_INLINE auto map(const T& named_arg)
-      -> decltype(FMT_DECLTYPE_THIS map(named_arg.value)) {
-    return map(named_arg.value);
-  }
-
-  auto map(...) -> unformattable { return {}; }
-};
-
-// A type constant after applying arg_mapper<Context>.
-template <typename T, typename Context>
-using mapped_type_constant =
-    type_constant<decltype(arg_mapper<Context>().map(std::declval<const T&>())),
-                  typename Context::char_type>;
-
-enum { packed_arg_bits = 4 };
-// Maximum number of arguments with packed types.
-enum { max_packed_args = 62 / packed_arg_bits };
-enum : unsigned long long { is_unpacked_bit = 1ULL << 63 };
-enum : unsigned long long { has_named_args_bit = 1ULL << 62 };
-
-template <typename Char, typename InputIt>
-auto copy_str(InputIt begin, InputIt end, appender out) -> appender {
-  get_container(out).append(begin, end);
-  return out;
-}
-template <typename Char, typename InputIt>
-auto copy_str(InputIt begin, InputIt end,
-              std::back_insert_iterator<std::string> out)
-    -> std::back_insert_iterator<std::string> {
-  get_container(out).append(begin, end);
-  return out;
-}
-
-template <typename Char, typename R, typename OutputIt>
-FMT_CONSTEXPR auto copy_str(R&& rng, OutputIt out) -> OutputIt {
-  return detail::copy_str<Char>(rng.begin(), rng.end(), out);
-}
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 500
-// A workaround for gcc 4.8 to make void_t work in a SFINAE context.
-template <typename...> struct void_t_impl {
-  using type = void;
-};
-template <typename... T> using void_t = typename void_t_impl<T...>::type;
-#else
-template <typename...> using void_t = void;
-#endif
-
-template <typename It, typename T, typename Enable = void>
-struct is_output_iterator : std::false_type {};
-
-template <typename It, typename T>
-struct is_output_iterator<
-    It, T,
-    void_t<typename std::iterator_traits<It>::iterator_category,
-           decltype(*std::declval<It>() = std::declval<T>())>>
-    : std::true_type {};
-
-template <typename It> struct is_back_insert_iterator : std::false_type {};
-template <typename Container>
-struct is_back_insert_iterator<std::back_insert_iterator<Container>>
-    : std::true_type {};
-
-// A type-erased reference to an std::locale to avoid a heavy <locale> include.
-class locale_ref {
- private:
-  const void* locale_;  // A type-erased pointer to std::locale.
-
- public:
-  constexpr FMT_INLINE locale_ref() : locale_(nullptr) {}
-  template <typename Locale> explicit locale_ref(const Locale& loc);
-
-  explicit operator bool() const noexcept { return locale_ != nullptr; }
-
-  template <typename Locale> auto get() const -> Locale;
-};
-
-template <typename> constexpr auto encode_types() -> unsigned long long {
-  return 0;
-}
-
-template <typename Context, typename Arg, typename... Args>
-constexpr auto encode_types() -> unsigned long long {
-  return static_cast<unsigned>(mapped_type_constant<Arg, Context>::value) |
-         (encode_types<Context, Args...>() << packed_arg_bits);
-}
-
-#if defined(__cpp_if_constexpr)
-// This type is intentionally undefined, only used for errors
-template <typename T, typename Char> struct type_is_unformattable_for;
-#endif
-
-template <bool PACKED, typename Context, typename T, FMT_ENABLE_IF(PACKED)>
-FMT_CONSTEXPR FMT_INLINE auto make_arg(T& val) -> value<Context> {
-  using arg_type = remove_cvref_t<decltype(arg_mapper<Context>().map(val))>;
-
-  constexpr bool formattable_char =
-      !std::is_same<arg_type, unformattable_char>::value;
-  static_assert(formattable_char, "Mixing character types is disallowed.");
-
-  // Formatting of arbitrary pointers is disallowed. If you want to format a
-  // pointer cast it to `void*` or `const void*`. In particular, this forbids
-  // formatting of `[const] volatile char*` printed as bool by iostreams.
-  constexpr bool formattable_pointer =
-      !std::is_same<arg_type, unformattable_pointer>::value;
-  static_assert(formattable_pointer,
-                "Formatting of non-void pointers is disallowed.");
-
-  constexpr bool formattable = !std::is_same<arg_type, unformattable>::value;
-#if defined(__cpp_if_constexpr)
-  if constexpr (!formattable) {
-    type_is_unformattable_for<T, typename Context::char_type> _;
-  }
-#endif
-  static_assert(
-      formattable,
-      "Cannot format an argument. To make type T formattable provide a "
-      "formatter<T> specialization: https://fmt.dev/latest/api.html#udt");
-  return {arg_mapper<Context>().map(val)};
-}
-
-template <typename Context, typename T>
-FMT_CONSTEXPR auto make_arg(T& val) -> basic_format_arg<Context> {
-  auto arg = basic_format_arg<Context>();
-  arg.type_ = mapped_type_constant<T, Context>::value;
-  arg.value_ = make_arg<true, Context>(val);
-  return arg;
-}
-
-template <bool PACKED, typename Context, typename T, FMT_ENABLE_IF(!PACKED)>
-FMT_CONSTEXPR inline auto make_arg(T& val) -> basic_format_arg<Context> {
-  return make_arg<Context>(val);
-}
-}  // namespace detail
-FMT_BEGIN_EXPORT
-
-// A formatting argument. Context is a template parameter for the compiled API
-// where output can be unbuffered.
-template <typename Context> class basic_format_arg {
- private:
-  detail::value<Context> value_;
-  detail::type type_;
-
-  template <typename ContextType, typename T>
-  friend FMT_CONSTEXPR auto detail::make_arg(T& value)
-      -> basic_format_arg<ContextType>;
-
-  template <typename Visitor, typename Ctx>
-  friend FMT_CONSTEXPR auto visit_format_arg(Visitor&& vis,
-                                             const basic_format_arg<Ctx>& arg)
-      -> decltype(vis(0));
-
-  friend class basic_format_args<Context>;
-  friend class dynamic_format_arg_store<Context>;
-
-  using char_type = typename Context::char_type;
-
-  template <typename T, typename Char, size_t NUM_ARGS, size_t NUM_NAMED_ARGS>
-  friend struct detail::arg_data;
-
-  basic_format_arg(const detail::named_arg_info<char_type>* args, size_t size)
-      : value_(args, size) {}
-
- public:
-  class handle {
-   public:
-    explicit handle(detail::custom_value<Context> custom) : custom_(custom) {}
-
-    void format(typename Context::parse_context_type& parse_ctx,
-                Context& ctx) const {
-      custom_.format(custom_.value, parse_ctx, ctx);
-    }
-
-   private:
-    detail::custom_value<Context> custom_;
-  };
-
-  constexpr basic_format_arg() : type_(detail::type::none_type) {}
-
-  constexpr explicit operator bool() const noexcept {
-    return type_ != detail::type::none_type;
-  }
-
-  auto type() const -> detail::type { return type_; }
-
-  auto is_integral() const -> bool { return detail::is_integral_type(type_); }
-  auto is_arithmetic() const -> bool {
-    return detail::is_arithmetic_type(type_);
-  }
-
-  FMT_INLINE auto format_custom(const char_type* parse_begin,
-                                typename Context::parse_context_type& parse_ctx,
-                                Context& ctx) -> bool {
-    if (type_ != detail::type::custom_type) return false;
-    parse_ctx.advance_to(parse_begin);
-    value_.custom.format(value_.custom.value, parse_ctx, ctx);
-    return true;
-  }
-};
-
-/**
-  \rst
-  Visits an argument dispatching to the appropriate visit method based on
-  the argument type. For example, if the argument type is ``double`` then
-  ``vis(value)`` will be called with the value of type ``double``.
-  \endrst
- */
-// DEPRECATED!
-template <typename Visitor, typename Context>
-FMT_CONSTEXPR FMT_INLINE auto visit_format_arg(
-    Visitor&& vis, const basic_format_arg<Context>& arg) -> decltype(vis(0)) {
-  switch (arg.type_) {
-  case detail::type::none_type:
-    break;
-  case detail::type::int_type:
-    return vis(arg.value_.int_value);
-  case detail::type::uint_type:
-    return vis(arg.value_.uint_value);
-  case detail::type::long_long_type:
-    return vis(arg.value_.long_long_value);
-  case detail::type::ulong_long_type:
-    return vis(arg.value_.ulong_long_value);
-  case detail::type::int128_type:
-    return vis(detail::convert_for_visit(arg.value_.int128_value));
-  case detail::type::uint128_type:
-    return vis(detail::convert_for_visit(arg.value_.uint128_value));
-  case detail::type::bool_type:
-    return vis(arg.value_.bool_value);
-  case detail::type::char_type:
-    return vis(arg.value_.char_value);
-  case detail::type::float_type:
-    return vis(arg.value_.float_value);
-  case detail::type::double_type:
-    return vis(arg.value_.double_value);
-  case detail::type::long_double_type:
-    return vis(arg.value_.long_double_value);
-  case detail::type::cstring_type:
-    return vis(arg.value_.string.data);
-  case detail::type::string_type:
-    using sv = basic_string_view<typename Context::char_type>;
-    return vis(sv(arg.value_.string.data, arg.value_.string.size));
-  case detail::type::pointer_type:
-    return vis(arg.value_.pointer);
-  case detail::type::custom_type:
-    return vis(typename basic_format_arg<Context>::handle(arg.value_.custom));
-  }
-  return vis(monostate());
-}
-
-// Formatting context.
-template <typename OutputIt, typename Char> class basic_format_context {
- private:
-  OutputIt out_;
-  basic_format_args<basic_format_context> args_;
-  detail::locale_ref loc_;
-
- public:
-  using iterator = OutputIt;
-  using format_arg = basic_format_arg<basic_format_context>;
-  using format_args = basic_format_args<basic_format_context>;
-  using parse_context_type = basic_format_parse_context<Char>;
-  template <typename T> using formatter_type = formatter<T, Char>;
-
-  /** The character type for the output. */
-  using char_type = Char;
-
-  basic_format_context(basic_format_context&&) = default;
-  basic_format_context(const basic_format_context&) = delete;
-  void operator=(const basic_format_context&) = delete;
-  /**
-    Constructs a ``basic_format_context`` object. References to the arguments
-    are stored in the object so make sure they have appropriate lifetimes.
-   */
-  constexpr basic_format_context(OutputIt out, format_args ctx_args,
-                                 detail::locale_ref loc = {})
-      : out_(out), args_(ctx_args), loc_(loc) {}
-
-  constexpr auto arg(int id) const -> format_arg { return args_.get(id); }
-  FMT_CONSTEXPR auto arg(basic_string_view<Char> name) -> format_arg {
-    return args_.get(name);
-  }
-  FMT_CONSTEXPR auto arg_id(basic_string_view<Char> name) -> int {
-    return args_.get_id(name);
-  }
-  auto args() const -> const format_args& { return args_; }
-
-  // DEPRECATED!
-  FMT_CONSTEXPR auto error_handler() -> detail::error_handler { return {}; }
-  void on_error(const char* message) { error_handler().on_error(message); }
-
-  // Returns an iterator to the beginning of the output range.
-  FMT_CONSTEXPR auto out() -> iterator { return out_; }
-
-  // Advances the begin iterator to ``it``.
-  void advance_to(iterator it) {
-    if (!detail::is_back_insert_iterator<iterator>()) out_ = it;
-  }
-
-  FMT_CONSTEXPR auto locale() -> detail::locale_ref { return loc_; }
-};
-
-template <typename Char>
-using buffer_context =
-    basic_format_context<detail::buffer_appender<Char>, Char>;
-using format_context = buffer_context<char>;
-
-template <typename T, typename Char = char>
-using is_formattable = bool_constant<!std::is_base_of<
-    detail::unformattable, decltype(detail::arg_mapper<buffer_context<Char>>()
-                                        .map(std::declval<T&>()))>::value>;
-
-/**
-  \rst
-  An array of references to arguments. It can be implicitly converted into
-  `~fmt::basic_format_args` for passing into type-erased formatting functions
-  such as `~fmt::vformat`.
-  \endrst
- */
-template <typename Context, typename... Args>
-class format_arg_store
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-    // Workaround a GCC template argument substitution bug.
-    : public basic_format_args<Context>
-#endif
-{
- private:
-  static const size_t num_args = sizeof...(Args);
-  static constexpr size_t num_named_args = detail::count_named_args<Args...>();
-  static const bool is_packed = num_args <= detail::max_packed_args;
-
-  using value_type = conditional_t<is_packed, detail::value<Context>,
-                                   basic_format_arg<Context>>;
-
-  detail::arg_data<value_type, typename Context::char_type, num_args,
-                   num_named_args>
-      data_;
-
-  friend class basic_format_args<Context>;
-
-  static constexpr unsigned long long desc =
-      (is_packed ? detail::encode_types<Context, Args...>()
-                 : detail::is_unpacked_bit | num_args) |
-      (num_named_args != 0
-           ? static_cast<unsigned long long>(detail::has_named_args_bit)
-           : 0);
-
- public:
-  template <typename... T>
-  FMT_CONSTEXPR FMT_INLINE format_arg_store(T&... args)
-      :
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-        basic_format_args<Context>(*this),
-#endif
-        data_{detail::make_arg<is_packed, Context>(args)...} {
-    if (detail::const_check(num_named_args != 0))
-      detail::init_named_args(data_.named_args(), 0, 0, args...);
-  }
-};
-
-/**
-  \rst
-  Constructs a `~fmt::format_arg_store` object that contains references to
-  arguments and can be implicitly converted to `~fmt::format_args`. `Context`
-  can be omitted in which case it defaults to `~fmt::format_context`.
-  See `~fmt::arg` for lifetime considerations.
-  \endrst
- */
-// Arguments are taken by lvalue references to avoid some lifetime issues.
-template <typename Context = format_context, typename... T>
-constexpr auto make_format_args(T&... args)
-    -> format_arg_store<Context, remove_cvref_t<T>...> {
-  return {args...};
-}
-
-/**
-  \rst
-  Returns a named argument to be used in a formatting function.
-  It should only be used in a call to a formatting function or
-  `dynamic_format_arg_store::push_back`.
-
-  **Example**::
-
-    fmt::print("Elapsed time: {s:.2f} seconds", fmt::arg("s", 1.23));
-  \endrst
- */
-template <typename Char, typename T>
-inline auto arg(const Char* name, const T& arg) -> detail::named_arg<Char, T> {
-  static_assert(!detail::is_named_arg<T>(), "nested named arguments");
-  return {name, arg};
-}
-FMT_END_EXPORT
-
-/**
-  \rst
-  A view of a collection of formatting arguments. To avoid lifetime issues it
-  should only be used as a parameter type in type-erased functions such as
-  ``vformat``::
-
-    void vlog(string_view format_str, format_args args);  // OK
-    format_args args = make_format_args();  // Error: dangling reference
-  \endrst
- */
-template <typename Context> class basic_format_args {
- public:
-  using size_type = int;
-  using format_arg = basic_format_arg<Context>;
-
- private:
-  // A descriptor that contains information about formatting arguments.
-  // If the number of arguments is less or equal to max_packed_args then
-  // argument types are passed in the descriptor. This reduces binary code size
-  // per formatting function call.
-  unsigned long long desc_;
-  union {
-    // If is_packed() returns true then argument values are stored in values_;
-    // otherwise they are stored in args_. This is done to improve cache
-    // locality and reduce compiled code size since storing larger objects
-    // may require more code (at least on x86-64) even if the same amount of
-    // data is actually copied to stack. It saves ~10% on the bloat test.
-    const detail::value<Context>* values_;
-    const format_arg* args_;
-  };
-
-  constexpr auto is_packed() const -> bool {
-    return (desc_ & detail::is_unpacked_bit) == 0;
-  }
-  auto has_named_args() const -> bool {
-    return (desc_ & detail::has_named_args_bit) != 0;
-  }
-
-  FMT_CONSTEXPR auto type(int index) const -> detail::type {
-    int shift = index * detail::packed_arg_bits;
-    unsigned int mask = (1 << detail::packed_arg_bits) - 1;
-    return static_cast<detail::type>((desc_ >> shift) & mask);
-  }
-
-  constexpr FMT_INLINE basic_format_args(unsigned long long desc,
-                                         const detail::value<Context>* values)
-      : desc_(desc), values_(values) {}
-  constexpr basic_format_args(unsigned long long desc, const format_arg* args)
-      : desc_(desc), args_(args) {}
-
- public:
-  constexpr basic_format_args() : desc_(0), args_(nullptr) {}
-
-  /**
-   \rst
-   Constructs a `basic_format_args` object from `~fmt::format_arg_store`.
-   \endrst
-   */
-  template <typename... Args>
-  constexpr FMT_INLINE basic_format_args(
-      const format_arg_store<Context, Args...>& store)
-      : basic_format_args(format_arg_store<Context, Args...>::desc,
-                          store.data_.args()) {}
-
-  /**
-   \rst
-   Constructs a `basic_format_args` object from
-   `~fmt::dynamic_format_arg_store`.
-   \endrst
-   */
-  constexpr FMT_INLINE basic_format_args(
-      const dynamic_format_arg_store<Context>& store)
-      : basic_format_args(store.get_types(), store.data()) {}
-
-  /**
-   \rst
-   Constructs a `basic_format_args` object from a dynamic set of arguments.
-   \endrst
-   */
-  constexpr basic_format_args(const format_arg* args, int count)
-      : basic_format_args(detail::is_unpacked_bit | detail::to_unsigned(count),
-                          args) {}
-
-  /** Returns the argument with the specified id. */
-  FMT_CONSTEXPR auto get(int id) const -> format_arg {
-    format_arg arg;
-    if (!is_packed()) {
-      if (id < max_size()) arg = args_[id];
-      return arg;
-    }
-    if (id >= detail::max_packed_args) return arg;
-    arg.type_ = type(id);
-    if (arg.type_ == detail::type::none_type) return arg;
-    arg.value_ = values_[id];
-    return arg;
-  }
-
-  template <typename Char>
-  auto get(basic_string_view<Char> name) const -> format_arg {
-    int id = get_id(name);
-    return id >= 0 ? get(id) : format_arg();
-  }
-
-  template <typename Char>
-  auto get_id(basic_string_view<Char> name) const -> int {
-    if (!has_named_args()) return -1;
-    const auto& named_args =
-        (is_packed() ? values_[-1] : args_[-1].value_).named_args;
-    for (size_t i = 0; i < named_args.size; ++i) {
-      if (named_args.data[i].name == name) return named_args.data[i].id;
-    }
-    return -1;
-  }
-
-  auto max_size() const -> int {
-    unsigned long long max_packed = detail::max_packed_args;
-    return static_cast<int>(is_packed() ? max_packed
-                                        : desc_ & ~detail::is_unpacked_bit);
-  }
-};
-
-/** An alias to ``basic_format_args<format_context>``. */
-// A separate type would result in shorter symbols but break ABI compatibility
-// between clang and gcc on ARM (#1919).
-FMT_EXPORT using format_args = basic_format_args<format_context>;
-
-// We cannot use enum classes as bit fields because of a gcc bug, so we put them
-// in namespaces instead (https://gcc.gnu.org/bugzilla/show_bug.cgi?id=61414).
-// Additionally, if an underlying type is specified, older gcc incorrectly warns
-// that the type is too small. Both bugs are fixed in gcc 9.3.
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 903
-#  define FMT_ENUM_UNDERLYING_TYPE(type)
-#else
-#  define FMT_ENUM_UNDERLYING_TYPE(type) : type
-#endif
-namespace align {
-enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, left, right, center,
-                                                  numeric};
-}
-using align_t = align::type;
-namespace sign {
-enum type FMT_ENUM_UNDERLYING_TYPE(unsigned char){none, minus, plus, space};
-}
-using sign_t = sign::type;
-
-namespace detail {
-
-// Workaround an array initialization issue in gcc 4.8.
-template <typename Char> struct fill_t {
- private:
-  enum { max_size = 4 };
-  Char data_[max_size] = {Char(' '), Char(0), Char(0), Char(0)};
-  unsigned char size_ = 1;
-
- public:
-  FMT_CONSTEXPR void operator=(basic_string_view<Char> s) {
-    auto size = s.size();
-    FMT_ASSERT(size <= max_size, "invalid fill");
-    for (size_t i = 0; i < size; ++i) data_[i] = s[i];
-    size_ = static_cast<unsigned char>(size);
-  }
-
-  constexpr auto size() const -> size_t { return size_; }
-  constexpr auto data() const -> const Char* { return data_; }
-
-  FMT_CONSTEXPR auto operator[](size_t index) -> Char& { return data_[index]; }
-  FMT_CONSTEXPR auto operator[](size_t index) const -> const Char& {
-    return data_[index];
-  }
-};
-}  // namespace detail
-
-enum class presentation_type : unsigned char {
-  none,
-  dec,             // 'd'
-  oct,             // 'o'
-  hex_lower,       // 'x'
-  hex_upper,       // 'X'
-  bin_lower,       // 'b'
-  bin_upper,       // 'B'
-  hexfloat_lower,  // 'a'
-  hexfloat_upper,  // 'A'
-  exp_lower,       // 'e'
-  exp_upper,       // 'E'
-  fixed_lower,     // 'f'
-  fixed_upper,     // 'F'
-  general_lower,   // 'g'
-  general_upper,   // 'G'
-  chr,             // 'c'
-  string,          // 's'
-  pointer,         // 'p'
-  debug            // '?'
-};
-
-// Format specifiers for built-in and string types.
-template <typename Char = char> struct format_specs {
-  int width;
-  int precision;
-  presentation_type type;
-  align_t align : 4;
-  sign_t sign : 3;
-  bool alt : 1;  // Alternate form ('#').
-  bool localized : 1;
-  detail::fill_t<Char> fill;
-
-  constexpr format_specs()
-      : width(0),
-        precision(-1),
-        type(presentation_type::none),
-        align(align::none),
-        sign(sign::none),
-        alt(false),
-        localized(false) {}
-};
-
-namespace detail {
-
-enum class arg_id_kind { none, index, name };
-
-// An argument reference.
-template <typename Char> struct arg_ref {
-  FMT_CONSTEXPR arg_ref() : kind(arg_id_kind::none), val() {}
-
-  FMT_CONSTEXPR explicit arg_ref(int index)
-      : kind(arg_id_kind::index), val(index) {}
-  FMT_CONSTEXPR explicit arg_ref(basic_string_view<Char> name)
-      : kind(arg_id_kind::name), val(name) {}
-
-  FMT_CONSTEXPR auto operator=(int idx) -> arg_ref& {
-    kind = arg_id_kind::index;
-    val.index = idx;
-    return *this;
-  }
-
-  arg_id_kind kind;
-  union value {
-    FMT_CONSTEXPR value(int idx = 0) : index(idx) {}
-    FMT_CONSTEXPR value(basic_string_view<Char> n) : name(n) {}
-
-    int index;
-    basic_string_view<Char> name;
-  } val;
-};
-
-// Format specifiers with width and precision resolved at formatting rather
-// than parsing time to allow reusing the same parsed specifiers with
-// different sets of arguments (precompilation of format strings).
-template <typename Char = char>
-struct dynamic_format_specs : format_specs<Char> {
-  arg_ref<Char> width_ref;
-  arg_ref<Char> precision_ref;
-};
-
-// Converts a character to ASCII. Returns '\0' on conversion failure.
-template <typename Char, FMT_ENABLE_IF(std::is_integral<Char>::value)>
-constexpr auto to_ascii(Char c) -> char {
-  return c <= 0xff ? static_cast<char>(c) : '\0';
-}
-template <typename Char, FMT_ENABLE_IF(std::is_enum<Char>::value)>
-constexpr auto to_ascii(Char c) -> char {
-  return c <= 0xff ? static_cast<char>(c) : '\0';
-}
-
-// Returns the number of code units in a code point or 1 on error.
-template <typename Char>
-FMT_CONSTEXPR auto code_point_length(const Char* begin) -> int {
-  if (const_check(sizeof(Char) != 1)) return 1;
-  auto c = static_cast<unsigned char>(*begin);
-  return static_cast<int>((0x3a55000000000000ull >> (2 * (c >> 3))) & 0x3) + 1;
-}
-
-// Return the result via the out param to workaround gcc bug 77539.
-template <bool IS_CONSTEXPR, typename T, typename Ptr = const T*>
-FMT_CONSTEXPR auto find(Ptr first, Ptr last, T value, Ptr& out) -> bool {
-  for (out = first; out != last; ++out) {
-    if (*out == value) return true;
-  }
-  return false;
-}
-
-template <>
-inline auto find<false, char>(const char* first, const char* last, char value,
-                              const char*& out) -> bool {
-  out = static_cast<const char*>(
-      std::memchr(first, value, to_unsigned(last - first)));
-  return out != nullptr;
-}
-
-// Parses the range [begin, end) as an unsigned integer. This function assumes
-// that the range is non-empty and the first character is a digit.
-template <typename Char>
-FMT_CONSTEXPR auto parse_nonnegative_int(const Char*& begin, const Char* end,
-                                         int error_value) noexcept -> int {
-  FMT_ASSERT(begin != end && '0' <= *begin && *begin <= '9', "");
-  unsigned value = 0, prev = 0;
-  auto p = begin;
-  do {
-    prev = value;
-    value = value * 10 + unsigned(*p - '0');
-    ++p;
-  } while (p != end && '0' <= *p && *p <= '9');
-  auto num_digits = p - begin;
-  begin = p;
-  if (num_digits <= std::numeric_limits<int>::digits10)
-    return static_cast<int>(value);
-  // Check for overflow.
-  const unsigned max = to_unsigned((std::numeric_limits<int>::max)());
-  return num_digits == std::numeric_limits<int>::digits10 + 1 &&
-                 prev * 10ull + unsigned(p[-1] - '0') <= max
-             ? static_cast<int>(value)
-             : error_value;
-}
-
-FMT_CONSTEXPR inline auto parse_align(char c) -> align_t {
-  switch (c) {
-  case '<':
-    return align::left;
-  case '>':
-    return align::right;
-  case '^':
-    return align::center;
-  }
-  return align::none;
-}
-
-template <typename Char> constexpr auto is_name_start(Char c) -> bool {
-  return ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z') || c == '_';
-}
-
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto do_parse_arg_id(const Char* begin, const Char* end,
-                                   Handler&& handler) -> const Char* {
-  Char c = *begin;
-  if (c >= '0' && c <= '9') {
-    int index = 0;
-    constexpr int max = (std::numeric_limits<int>::max)();
-    if (c != '0')
-      index = parse_nonnegative_int(begin, end, max);
-    else
-      ++begin;
-    if (begin == end || (*begin != '}' && *begin != ':'))
-      throw_format_error("invalid format string");
-    else
-      handler.on_index(index);
-    return begin;
-  }
-  if (!is_name_start(c)) {
-    throw_format_error("invalid format string");
-    return begin;
-  }
-  auto it = begin;
-  do {
-    ++it;
-  } while (it != end && (is_name_start(*it) || ('0' <= *it && *it <= '9')));
-  handler.on_name({begin, to_unsigned(it - begin)});
-  return it;
-}
-
-template <typename Char, typename Handler>
-FMT_CONSTEXPR FMT_INLINE auto parse_arg_id(const Char* begin, const Char* end,
-                                           Handler&& handler) -> const Char* {
-  FMT_ASSERT(begin != end, "");
-  Char c = *begin;
-  if (c != '}' && c != ':') return do_parse_arg_id(begin, end, handler);
-  handler.on_auto();
-  return begin;
-}
-
-template <typename Char> struct dynamic_spec_id_handler {
-  basic_format_parse_context<Char>& ctx;
-  arg_ref<Char>& ref;
-
-  FMT_CONSTEXPR void on_auto() {
-    int id = ctx.next_arg_id();
-    ref = arg_ref<Char>(id);
-    ctx.check_dynamic_spec(id);
-  }
-  FMT_CONSTEXPR void on_index(int id) {
-    ref = arg_ref<Char>(id);
-    ctx.check_arg_id(id);
-    ctx.check_dynamic_spec(id);
-  }
-  FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
-    ref = arg_ref<Char>(id);
-    ctx.check_arg_id(id);
-  }
-};
-
-// Parses [integer | "{" [arg_id] "}"].
-template <typename Char>
-FMT_CONSTEXPR auto parse_dynamic_spec(const Char* begin, const Char* end,
-                                      int& value, arg_ref<Char>& ref,
-                                      basic_format_parse_context<Char>& ctx)
-    -> const Char* {
-  FMT_ASSERT(begin != end, "");
-  if ('0' <= *begin && *begin <= '9') {
-    int val = parse_nonnegative_int(begin, end, -1);
-    if (val != -1)
-      value = val;
-    else
-      throw_format_error("number is too big");
-  } else if (*begin == '{') {
-    ++begin;
-    auto handler = dynamic_spec_id_handler<Char>{ctx, ref};
-    if (begin != end) begin = parse_arg_id(begin, end, handler);
-    if (begin != end && *begin == '}') return ++begin;
-    throw_format_error("invalid format string");
-  }
-  return begin;
-}
-
-template <typename Char>
-FMT_CONSTEXPR auto parse_precision(const Char* begin, const Char* end,
-                                   int& value, arg_ref<Char>& ref,
-                                   basic_format_parse_context<Char>& ctx)
-    -> const Char* {
-  ++begin;
-  if (begin == end || *begin == '}') {
-    throw_format_error("invalid precision");
-    return begin;
-  }
-  return parse_dynamic_spec(begin, end, value, ref, ctx);
-}
-
-enum class state { start, align, sign, hash, zero, width, precision, locale };
-
-// Parses standard format specifiers.
-template <typename Char>
-FMT_CONSTEXPR FMT_INLINE auto parse_format_specs(
-    const Char* begin, const Char* end, dynamic_format_specs<Char>& specs,
-    basic_format_parse_context<Char>& ctx, type arg_type) -> const Char* {
-  auto c = '\0';
-  if (end - begin > 1) {
-    auto next = to_ascii(begin[1]);
-    c = parse_align(next) == align::none ? to_ascii(*begin) : '\0';
-  } else {
-    if (begin == end) return begin;
-    c = to_ascii(*begin);
-  }
-
-  struct {
-    state current_state = state::start;
-    FMT_CONSTEXPR void operator()(state s, bool valid = true) {
-      if (current_state >= s || !valid)
-        throw_format_error("invalid format specifier");
-      current_state = s;
-    }
-  } enter_state;
-
-  using pres = presentation_type;
-  constexpr auto integral_set = sint_set | uint_set | bool_set | char_set;
-  struct {
-    const Char*& begin;
-    dynamic_format_specs<Char>& specs;
-    type arg_type;
-
-    FMT_CONSTEXPR auto operator()(pres pres_type, int set) -> const Char* {
-      if (!in(arg_type, set)) {
-        if (arg_type == type::none_type) return begin;
-        throw_format_error("invalid format specifier");
-      }
-      specs.type = pres_type;
-      return begin + 1;
-    }
-  } parse_presentation_type{begin, specs, arg_type};
-
-  for (;;) {
-    switch (c) {
-    case '<':
-    case '>':
-    case '^':
-      enter_state(state::align);
-      specs.align = parse_align(c);
-      ++begin;
-      break;
-    case '+':
-    case '-':
-    case ' ':
-      if (arg_type == type::none_type) return begin;
-      enter_state(state::sign, in(arg_type, sint_set | float_set));
-      switch (c) {
-      case '+':
-        specs.sign = sign::plus;
-        break;
-      case '-':
-        specs.sign = sign::minus;
-        break;
-      case ' ':
-        specs.sign = sign::space;
-        break;
-      }
-      ++begin;
-      break;
-    case '#':
-      if (arg_type == type::none_type) return begin;
-      enter_state(state::hash, is_arithmetic_type(arg_type));
-      specs.alt = true;
-      ++begin;
-      break;
-    case '0':
-      enter_state(state::zero);
-      if (!is_arithmetic_type(arg_type)) {
-        if (arg_type == type::none_type) return begin;
-        throw_format_error("format specifier requires numeric argument");
-      }
-      if (specs.align == align::none) {
-        // Ignore 0 if align is specified for compatibility with std::format.
-        specs.align = align::numeric;
-        specs.fill[0] = Char('0');
-      }
-      ++begin;
-      break;
-    case '1':
-    case '2':
-    case '3':
-    case '4':
-    case '5':
-    case '6':
-    case '7':
-    case '8':
-    case '9':
-    case '{':
-      enter_state(state::width);
-      begin = parse_dynamic_spec(begin, end, specs.width, specs.width_ref, ctx);
-      break;
-    case '.':
-      if (arg_type == type::none_type) return begin;
-      enter_state(state::precision,
-                  in(arg_type, float_set | string_set | cstring_set));
-      begin = parse_precision(begin, end, specs.precision, specs.precision_ref,
-                              ctx);
-      break;
-    case 'L':
-      if (arg_type == type::none_type) return begin;
-      enter_state(state::locale, is_arithmetic_type(arg_type));
-      specs.localized = true;
-      ++begin;
-      break;
-    case 'd':
-      return parse_presentation_type(pres::dec, integral_set);
-    case 'o':
-      return parse_presentation_type(pres::oct, integral_set);
-    case 'x':
-      return parse_presentation_type(pres::hex_lower, integral_set);
-    case 'X':
-      return parse_presentation_type(pres::hex_upper, integral_set);
-    case 'b':
-      return parse_presentation_type(pres::bin_lower, integral_set);
-    case 'B':
-      return parse_presentation_type(pres::bin_upper, integral_set);
-    case 'a':
-      return parse_presentation_type(pres::hexfloat_lower, float_set);
-    case 'A':
-      return parse_presentation_type(pres::hexfloat_upper, float_set);
-    case 'e':
-      return parse_presentation_type(pres::exp_lower, float_set);
-    case 'E':
-      return parse_presentation_type(pres::exp_upper, float_set);
-    case 'f':
-      return parse_presentation_type(pres::fixed_lower, float_set);
-    case 'F':
-      return parse_presentation_type(pres::fixed_upper, float_set);
-    case 'g':
-      return parse_presentation_type(pres::general_lower, float_set);
-    case 'G':
-      return parse_presentation_type(pres::general_upper, float_set);
-    case 'c':
-      if (arg_type == type::bool_type)
-        throw_format_error("invalid format specifier");
-      return parse_presentation_type(pres::chr, integral_set);
-    case 's':
-      return parse_presentation_type(pres::string,
-                                     bool_set | string_set | cstring_set);
-    case 'p':
-      return parse_presentation_type(pres::pointer, pointer_set | cstring_set);
-    case '?':
-      return parse_presentation_type(pres::debug,
-                                     char_set | string_set | cstring_set);
-    case '}':
-      return begin;
-    default: {
-      if (*begin == '}') return begin;
-      // Parse fill and alignment.
-      auto fill_end = begin + code_point_length(begin);
-      if (end - fill_end <= 0) {
-        throw_format_error("invalid format specifier");
-        return begin;
-      }
-      if (*begin == '{') {
-        throw_format_error("invalid fill character '{'");
-        return begin;
-      }
-      auto align = parse_align(to_ascii(*fill_end));
-      enter_state(state::align, align != align::none);
-      specs.fill = {begin, to_unsigned(fill_end - begin)};
-      specs.align = align;
-      begin = fill_end + 1;
-    }
-    }
-    if (begin == end) return begin;
-    c = to_ascii(*begin);
-  }
-}
-
-template <typename Char, typename Handler>
-FMT_CONSTEXPR auto parse_replacement_field(const Char* begin, const Char* end,
-                                           Handler&& handler) -> const Char* {
-  struct id_adapter {
-    Handler& handler;
-    int arg_id;
-
-    FMT_CONSTEXPR void on_auto() { arg_id = handler.on_arg_id(); }
-    FMT_CONSTEXPR void on_index(int id) { arg_id = handler.on_arg_id(id); }
-    FMT_CONSTEXPR void on_name(basic_string_view<Char> id) {
-      arg_id = handler.on_arg_id(id);
-    }
-  };
-
-  ++begin;
-  if (begin == end) return handler.on_error("invalid format string"), end;
-  if (*begin == '}') {
-    handler.on_replacement_field(handler.on_arg_id(), begin);
-  } else if (*begin == '{') {
-    handler.on_text(begin, begin + 1);
-  } else {
-    auto adapter = id_adapter{handler, 0};
-    begin = parse_arg_id(begin, end, adapter);
-    Char c = begin != end ? *begin : Char();
-    if (c == '}') {
-      handler.on_replacement_field(adapter.arg_id, begin);
-    } else if (c == ':') {
-      begin = handler.on_format_specs(adapter.arg_id, begin + 1, end);
-      if (begin == end || *begin != '}')
-        return handler.on_error("unknown format specifier"), end;
-    } else {
-      return handler.on_error("missing '}' in format string"), end;
-    }
-  }
-  return begin + 1;
-}
-
-template <bool IS_CONSTEXPR, typename Char, typename Handler>
-FMT_CONSTEXPR FMT_INLINE void parse_format_string(
-    basic_string_view<Char> format_str, Handler&& handler) {
-  auto begin = format_str.data();
-  auto end = begin + format_str.size();
-  if (end - begin < 32) {
-    // Use a simple loop instead of memchr for small strings.
-    const Char* p = begin;
-    while (p != end) {
-      auto c = *p++;
-      if (c == '{') {
-        handler.on_text(begin, p - 1);
-        begin = p = parse_replacement_field(p - 1, end, handler);
-      } else if (c == '}') {
-        if (p == end || *p != '}')
-          return handler.on_error("unmatched '}' in format string");
-        handler.on_text(begin, p);
-        begin = ++p;
-      }
-    }
-    handler.on_text(begin, end);
-    return;
-  }
-  struct writer {
-    FMT_CONSTEXPR void operator()(const Char* from, const Char* to) {
-      if (from == to) return;
-      for (;;) {
-        const Char* p = nullptr;
-        if (!find<IS_CONSTEXPR>(from, to, Char('}'), p))
-          return handler_.on_text(from, to);
-        ++p;
-        if (p == to || *p != '}')
-          return handler_.on_error("unmatched '}' in format string");
-        handler_.on_text(from, p);
-        from = p + 1;
-      }
-    }
-    Handler& handler_;
-  } write = {handler};
-  while (begin != end) {
-    // Doing two passes with memchr (one for '{' and another for '}') is up to
-    // 2.5x faster than the naive one-pass implementation on big format strings.
-    const Char* p = begin;
-    if (*begin != '{' && !find<IS_CONSTEXPR>(begin + 1, end, Char('{'), p))
-      return write(begin, end);
-    write(begin, p);
-    begin = parse_replacement_field(p, end, handler);
-  }
-}
-
-template <typename T, bool = is_named_arg<T>::value> struct strip_named_arg {
-  using type = T;
-};
-template <typename T> struct strip_named_arg<T, true> {
-  using type = remove_cvref_t<decltype(T::value)>;
-};
-
-template <typename T, typename ParseContext>
-FMT_CONSTEXPR auto parse_format_specs(ParseContext& ctx)
-    -> decltype(ctx.begin()) {
-  using char_type = typename ParseContext::char_type;
-  using context = buffer_context<char_type>;
-  using mapped_type = conditional_t<
-      mapped_type_constant<T, context>::value != type::custom_type,
-      decltype(arg_mapper<context>().map(std::declval<const T&>())),
-      typename strip_named_arg<T>::type>;
-#if defined(__cpp_if_constexpr)
-  if constexpr (std::is_default_constructible<
-                    formatter<mapped_type, char_type>>::value) {
-    return formatter<mapped_type, char_type>().parse(ctx);
-  } else {
-    type_is_unformattable_for<T, char_type> _;
-    return ctx.begin();
-  }
-#else
-  return formatter<mapped_type, char_type>().parse(ctx);
-#endif
-}
-
-// Checks char specs and returns true iff the presentation type is char-like.
-template <typename Char>
-FMT_CONSTEXPR auto check_char_specs(const format_specs<Char>& specs) -> bool {
-  if (specs.type != presentation_type::none &&
-      specs.type != presentation_type::chr &&
-      specs.type != presentation_type::debug) {
-    return false;
-  }
-  if (specs.align == align::numeric || specs.sign != sign::none || specs.alt)
-    throw_format_error("invalid format specifier for char");
-  return true;
-}
-
-#if FMT_USE_NONTYPE_TEMPLATE_ARGS
-template <int N, typename T, typename... Args, typename Char>
-constexpr auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
-  if constexpr (is_statically_named_arg<T>()) {
-    if (name == T::name) return N;
-  }
-  if constexpr (sizeof...(Args) > 0)
-    return get_arg_index_by_name<N + 1, Args...>(name);
-  (void)name;  // Workaround an MSVC bug about "unused" parameter.
-  return -1;
-}
-#endif
-
-template <typename... Args, typename Char>
-FMT_CONSTEXPR auto get_arg_index_by_name(basic_string_view<Char> name) -> int {
-#if FMT_USE_NONTYPE_TEMPLATE_ARGS
-  if constexpr (sizeof...(Args) > 0)
-    return get_arg_index_by_name<0, Args...>(name);
-#endif
-  (void)name;
-  return -1;
-}
-
-template <typename Char, typename... Args> class format_string_checker {
- private:
-  using parse_context_type = compile_parse_context<Char>;
-  static constexpr int num_args = sizeof...(Args);
-
-  // Format specifier parsing function.
-  // In the future basic_format_parse_context will replace compile_parse_context
-  // here and will use is_constant_evaluated and downcasting to access the data
-  // needed for compile-time checks: https://godbolt.org/z/GvWzcTjh1.
-  using parse_func = const Char* (*)(parse_context_type&);
-
-  type types_[num_args > 0 ? static_cast<size_t>(num_args) : 1];
-  parse_context_type context_;
-  parse_func parse_funcs_[num_args > 0 ? static_cast<size_t>(num_args) : 1];
-
- public:
-  explicit FMT_CONSTEXPR format_string_checker(basic_string_view<Char> fmt)
-      : types_{mapped_type_constant<Args, buffer_context<Char>>::value...},
-        context_(fmt, num_args, types_),
-        parse_funcs_{&parse_format_specs<Args, parse_context_type>...} {}
-
-  FMT_CONSTEXPR void on_text(const Char*, const Char*) {}
-
-  FMT_CONSTEXPR auto on_arg_id() -> int { return context_.next_arg_id(); }
-  FMT_CONSTEXPR auto on_arg_id(int id) -> int {
-    return context_.check_arg_id(id), id;
-  }
-  FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
-#if FMT_USE_NONTYPE_TEMPLATE_ARGS
-    auto index = get_arg_index_by_name<Args...>(id);
-    if (index < 0) on_error("named argument is not found");
-    return index;
-#else
-    (void)id;
-    on_error("compile-time checks for named arguments require C++20 support");
-    return 0;
-#endif
-  }
-
-  FMT_CONSTEXPR void on_replacement_field(int id, const Char* begin) {
-    on_format_specs(id, begin, begin);  // Call parse() on empty specs.
-  }
-
-  FMT_CONSTEXPR auto on_format_specs(int id, const Char* begin, const Char*)
-      -> const Char* {
-    context_.advance_to(begin);
-    // id >= 0 check is a workaround for gcc 10 bug (#2065).
-    return id >= 0 && id < num_args ? parse_funcs_[id](context_) : begin;
-  }
-
-  FMT_CONSTEXPR void on_error(const char* message) {
-    throw_format_error(message);
-  }
-};
-
-// Reports a compile-time error if S is not a valid format string.
-template <typename..., typename S, FMT_ENABLE_IF(!is_compile_string<S>::value)>
-FMT_INLINE void check_format_string(const S&) {
-#ifdef FMT_ENFORCE_COMPILE_STRING
-  static_assert(is_compile_string<S>::value,
-                "FMT_ENFORCE_COMPILE_STRING requires all format strings to use "
-                "FMT_STRING.");
-#endif
-}
-template <typename... Args, typename S,
-          FMT_ENABLE_IF(is_compile_string<S>::value)>
-void check_format_string(S format_str) {
-  using char_t = typename S::char_type;
-  FMT_CONSTEXPR auto s = basic_string_view<char_t>(format_str);
-  using checker = format_string_checker<char_t, remove_cvref_t<Args>...>;
-  FMT_CONSTEXPR bool error = (parse_format_string<true>(s, checker(s)), true);
-  ignore_unused(error);
-}
-
-template <typename Char = char> struct vformat_args {
-  using type = basic_format_args<
-      basic_format_context<std::back_insert_iterator<buffer<Char>>, Char>>;
-};
-template <> struct vformat_args<char> {
-  using type = format_args;
-};
-
-// Use vformat_args and avoid type_identity to keep symbols short.
-template <typename Char>
-void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
-                typename vformat_args<Char>::type args, locale_ref loc = {});
-
-FMT_API void vprint_mojibake(std::FILE*, string_view, format_args);
-#ifndef _WIN32
-inline void vprint_mojibake(std::FILE*, string_view, format_args) {}
-#endif
-}  // namespace detail
-
-FMT_BEGIN_EXPORT
-
-// A formatter specialization for natively supported types.
-template <typename T, typename Char>
-struct formatter<T, Char,
-                 enable_if_t<detail::type_constant<T, Char>::value !=
-                             detail::type::custom_type>> {
- private:
-  detail::dynamic_format_specs<Char> specs_;
-
- public:
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* {
-    auto type = detail::type_constant<T, Char>::value;
-    auto end =
-        detail::parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx, type);
-    if (type == detail::type::char_type) detail::check_char_specs(specs_);
-    return end;
-  }
-
-  template <detail::type U = detail::type_constant<T, Char>::value,
-            FMT_ENABLE_IF(U == detail::type::string_type ||
-                          U == detail::type::cstring_type ||
-                          U == detail::type::char_type)>
-  FMT_CONSTEXPR void set_debug_format(bool set = true) {
-    specs_.type = set ? presentation_type::debug : presentation_type::none;
-  }
-
-  template <typename FormatContext>
-  FMT_CONSTEXPR auto format(const T& val, FormatContext& ctx) const
-      -> decltype(ctx.out());
-};
-
-template <typename Char = char> struct runtime_format_string {
-  basic_string_view<Char> str;
-};
-
-/** A compile-time format string. */
-template <typename Char, typename... Args> class basic_format_string {
- private:
-  basic_string_view<Char> str_;
-
- public:
-  template <typename S,
-            FMT_ENABLE_IF(
-                std::is_convertible<const S&, basic_string_view<Char>>::value)>
-  FMT_CONSTEVAL FMT_INLINE basic_format_string(const S& s) : str_(s) {
-    static_assert(
-        detail::count<
-            (std::is_base_of<detail::view, remove_reference_t<Args>>::value &&
-             std::is_reference<Args>::value)...>() == 0,
-        "passing views as lvalues is disallowed");
-#ifdef FMT_HAS_CONSTEVAL
-    if constexpr (detail::count_named_args<Args...>() ==
-                  detail::count_statically_named_args<Args...>()) {
-      using checker =
-          detail::format_string_checker<Char, remove_cvref_t<Args>...>;
-      detail::parse_format_string<true>(str_, checker(s));
-    }
-#else
-    detail::check_format_string<Args...>(s);
-#endif
-  }
-  basic_format_string(runtime_format_string<Char> fmt) : str_(fmt.str) {}
-
-  FMT_INLINE operator basic_string_view<Char>() const { return str_; }
-  FMT_INLINE auto get() const -> basic_string_view<Char> { return str_; }
-};
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-// Workaround broken conversion on older gcc.
-template <typename...> using format_string = string_view;
-inline auto runtime(string_view s) -> string_view { return s; }
-#else
-template <typename... Args>
-using format_string = basic_format_string<char, type_identity_t<Args>...>;
-/**
-  \rst
-  Creates a runtime format string.
-
-  **Example**::
-
-    // Check format string at runtime instead of compile-time.
-    fmt::print(fmt::runtime("{:d}"), "I am not a number");
-  \endrst
- */
-inline auto runtime(string_view s) -> runtime_format_string<> { return {{s}}; }
-#endif
-
-FMT_API auto vformat(string_view fmt, format_args args) -> std::string;
-
-/**
-  \rst
-  Formats ``args`` according to specifications in ``fmt`` and returns the result
-  as a string.
-
-  **Example**::
-
-    #include <fmt/core.h>
-    std::string message = fmt::format("The answer is {}.", 42);
-  \endrst
-*/
-template <typename... T>
-FMT_NODISCARD FMT_INLINE auto format(format_string<T...> fmt, T&&... args)
-    -> std::string {
-  return vformat(fmt, fmt::make_format_args(args...));
-}
-
-/** Formats a string and writes the output to ``out``. */
-template <typename OutputIt,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-auto vformat_to(OutputIt out, string_view fmt, format_args args) -> OutputIt {
-  auto&& buf = detail::get_buffer<char>(out);
-  detail::vformat_to(buf, fmt, args, {});
-  return detail::get_iterator(buf, out);
-}
-
-/**
- \rst
- Formats ``args`` according to specifications in ``fmt``, writes the result to
- the output iterator ``out`` and returns the iterator past the end of the output
- range. `format_to` does not append a terminating null character.
-
- **Example**::
-
-   auto out = std::vector<char>();
-   fmt::format_to(std::back_inserter(out), "{}", 42);
- \endrst
- */
-template <typename OutputIt, typename... T,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-FMT_INLINE auto format_to(OutputIt out, format_string<T...> fmt, T&&... args)
-    -> OutputIt {
-  return vformat_to(out, fmt, fmt::make_format_args(args...));
-}
-
-template <typename OutputIt> struct format_to_n_result {
-  /** Iterator past the end of the output range. */
-  OutputIt out;
-  /** Total (not truncated) output size. */
-  size_t size;
-};
-
-template <typename OutputIt, typename... T,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-auto vformat_to_n(OutputIt out, size_t n, string_view fmt, format_args args)
-    -> format_to_n_result<OutputIt> {
-  using traits = detail::fixed_buffer_traits;
-  auto buf = detail::iterator_buffer<OutputIt, char, traits>(out, n);
-  detail::vformat_to(buf, fmt, args, {});
-  return {buf.out(), buf.count()};
-}
-
-/**
-  \rst
-  Formats ``args`` according to specifications in ``fmt``, writes up to ``n``
-  characters of the result to the output iterator ``out`` and returns the total
-  (not truncated) output size and the iterator past the end of the output range.
-  `format_to_n` does not append a terminating null character.
-  \endrst
- */
-template <typename OutputIt, typename... T,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value)>
-FMT_INLINE auto format_to_n(OutputIt out, size_t n, format_string<T...> fmt,
-                            T&&... args) -> format_to_n_result<OutputIt> {
-  return vformat_to_n(out, n, fmt, fmt::make_format_args(args...));
-}
-
-/** Returns the number of chars in the output of ``format(fmt, args...)``. */
-template <typename... T>
-FMT_NODISCARD FMT_INLINE auto formatted_size(format_string<T...> fmt,
-                                             T&&... args) -> size_t {
-  auto buf = detail::counting_buffer<>();
-  detail::vformat_to<char>(buf, fmt, fmt::make_format_args(args...), {});
-  return buf.count();
-}
-
-FMT_API void vprint(string_view fmt, format_args args);
-FMT_API void vprint(std::FILE* f, string_view fmt, format_args args);
-
-/**
-  \rst
-  Formats ``args`` according to specifications in ``fmt`` and writes the output
-  to ``stdout``.
-
-  **Example**::
-
-    fmt::print("Elapsed time: {0:.2f} seconds", 1.23);
-  \endrst
- */
-template <typename... T>
-FMT_INLINE void print(format_string<T...> fmt, T&&... args) {
-  const auto& vargs = fmt::make_format_args(args...);
-  return detail::is_utf8() ? vprint(fmt, vargs)
-                           : detail::vprint_mojibake(stdout, fmt, vargs);
-}
-
-/**
-  \rst
-  Formats ``args`` according to specifications in ``fmt`` and writes the
-  output to the file ``f``.
-
-  **Example**::
-
-    fmt::print(stderr, "Don't {}!", "panic");
-  \endrst
- */
-template <typename... T>
-FMT_INLINE void print(std::FILE* f, format_string<T...> fmt, T&&... args) {
-  const auto& vargs = fmt::make_format_args(args...);
-  return detail::is_utf8() ? vprint(f, fmt, vargs)
-                           : detail::vprint_mojibake(f, fmt, vargs);
-}
-
-/**
-  Formats ``args`` according to specifications in ``fmt`` and writes the
-  output to the file ``f`` followed by a newline.
- */
-template <typename... T>
-FMT_INLINE void println(std::FILE* f, format_string<T...> fmt, T&&... args) {
-  return fmt::print(f, "{}\n", fmt::format(fmt, std::forward<T>(args)...));
-}
-
-/**
-  Formats ``args`` according to specifications in ``fmt`` and writes the output
-  to ``stdout`` followed by a newline.
- */
-template <typename... T>
-FMT_INLINE void println(format_string<T...> fmt, T&&... args) {
-  return fmt::println(stdout, fmt, std::forward<T>(args)...);
-}
-
-FMT_END_EXPORT
-FMT_GCC_PRAGMA("GCC pop_options")
-FMT_END_NAMESPACE
-
-#ifdef FMT_HEADER_ONLY
-#  include "format.h"
-#endif
-#endif  // FMT_CORE_H_
diff --git a/3party/fmt/include/fmt/format-inl.h b/3party/fmt/include/fmt/format-inl.h
deleted file mode 100644
index efac5d1..0000000
--- a/3party/fmt/include/fmt/format-inl.h
+++ /dev/null
@@ -1,1678 +0,0 @@
-// Formatting library for C++ - implementation
-//
-// Copyright (c) 2012 - 2016, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_FORMAT_INL_H_
-#define FMT_FORMAT_INL_H_
-
-#include <algorithm>
-#include <cerrno>  // errno
-#include <climits>
-#include <cmath>
-#include <exception>
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-#  include <locale>
-#endif
-
-#if defined(_WIN32) && !defined(FMT_WINDOWS_NO_WCHAR)
-#  include <io.h>  // _isatty
-#endif
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-FMT_FUNC void assert_fail(const char* file, int line, const char* message) {
-  // Use unchecked std::fprintf to avoid triggering another assertion when
-  // writing to stderr fails
-  std::fprintf(stderr, "%s:%d: assertion failed: %s", file, line, message);
-  // Chosen instead of std::abort to satisfy Clang in CUDA mode during device
-  // code pass.
-  std::terminate();
-}
-
-FMT_FUNC void throw_format_error(const char* message) {
-  FMT_THROW(format_error(message));
-}
-
-FMT_FUNC void format_error_code(detail::buffer<char>& out, int error_code,
-                                string_view message) noexcept {
-  // Report error code making sure that the output fits into
-  // inline_buffer_size to avoid dynamic memory allocation and potential
-  // bad_alloc.
-  out.try_resize(0);
-  static const char SEP[] = ": ";
-  static const char ERROR_STR[] = "error ";
-  // Subtract 2 to account for terminating null characters in SEP and ERROR_STR.
-  size_t error_code_size = sizeof(SEP) + sizeof(ERROR_STR) - 2;
-  auto abs_value = static_cast<uint32_or_64_or_128_t<int>>(error_code);
-  if (detail::is_negative(error_code)) {
-    abs_value = 0 - abs_value;
-    ++error_code_size;
-  }
-  error_code_size += detail::to_unsigned(detail::count_digits(abs_value));
-  auto it = buffer_appender<char>(out);
-  if (message.size() <= inline_buffer_size - error_code_size)
-    fmt::format_to(it, FMT_STRING("{}{}"), message, SEP);
-  fmt::format_to(it, FMT_STRING("{}{}"), ERROR_STR, error_code);
-  FMT_ASSERT(out.size() <= inline_buffer_size, "");
-}
-
-FMT_FUNC void report_error(format_func func, int error_code,
-                           const char* message) noexcept {
-  memory_buffer full_message;
-  func(full_message, error_code, message);
-  // Don't use fwrite_fully because the latter may throw.
-  if (std::fwrite(full_message.data(), full_message.size(), 1, stderr) > 0)
-    std::fputc('\n', stderr);
-}
-
-// A wrapper around fwrite that throws on error.
-inline void fwrite_fully(const void* ptr, size_t count, FILE* stream) {
-  size_t written = std::fwrite(ptr, 1, count, stream);
-  if (written < count)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
-}
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-template <typename Locale>
-locale_ref::locale_ref(const Locale& loc) : locale_(&loc) {
-  static_assert(std::is_same<Locale, std::locale>::value, "");
-}
-
-template <typename Locale> auto locale_ref::get() const -> Locale {
-  static_assert(std::is_same<Locale, std::locale>::value, "");
-  return locale_ ? *static_cast<const std::locale*>(locale_) : std::locale();
-}
-
-template <typename Char>
-FMT_FUNC auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char> {
-  auto& facet = std::use_facet<std::numpunct<Char>>(loc.get<std::locale>());
-  auto grouping = facet.grouping();
-  auto thousands_sep = grouping.empty() ? Char() : facet.thousands_sep();
-  return {std::move(grouping), thousands_sep};
-}
-template <typename Char>
-FMT_FUNC auto decimal_point_impl(locale_ref loc) -> Char {
-  return std::use_facet<std::numpunct<Char>>(loc.get<std::locale>())
-      .decimal_point();
-}
-#else
-template <typename Char>
-FMT_FUNC auto thousands_sep_impl(locale_ref) -> thousands_sep_result<Char> {
-  return {"\03", FMT_STATIC_THOUSANDS_SEPARATOR};
-}
-template <typename Char> FMT_FUNC Char decimal_point_impl(locale_ref) {
-  return '.';
-}
-#endif
-
-FMT_FUNC auto write_loc(appender out, loc_value value,
-                        const format_specs<>& specs, locale_ref loc) -> bool {
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-  auto locale = loc.get<std::locale>();
-  // We cannot use the num_put<char> facet because it may produce output in
-  // a wrong encoding.
-  using facet = format_facet<std::locale>;
-  if (std::has_facet<facet>(locale))
-    return std::use_facet<facet>(locale).put(out, value, specs);
-  return facet(locale).put(out, value, specs);
-#endif
-  return false;
-}
-}  // namespace detail
-
-template <typename Locale> typename Locale::id format_facet<Locale>::id;
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-template <typename Locale> format_facet<Locale>::format_facet(Locale& loc) {
-  auto& numpunct = std::use_facet<std::numpunct<char>>(loc);
-  grouping_ = numpunct.grouping();
-  if (!grouping_.empty()) separator_ = std::string(1, numpunct.thousands_sep());
-}
-
-template <>
-FMT_API FMT_FUNC auto format_facet<std::locale>::do_put(
-    appender out, loc_value val, const format_specs<>& specs) const -> bool {
-  return val.visit(
-      detail::loc_writer<>{out, specs, separator_, grouping_, decimal_point_});
-}
-#endif
-
-FMT_FUNC auto vsystem_error(int error_code, string_view fmt, format_args args)
-    -> std::system_error {
-  auto ec = std::error_code(error_code, std::generic_category());
-  return std::system_error(ec, vformat(fmt, args));
-}
-
-namespace detail {
-
-template <typename F>
-inline auto operator==(basic_fp<F> x, basic_fp<F> y) -> bool {
-  return x.f == y.f && x.e == y.e;
-}
-
-// Compilers should be able to optimize this into the ror instruction.
-FMT_CONSTEXPR inline auto rotr(uint32_t n, uint32_t r) noexcept -> uint32_t {
-  r &= 31;
-  return (n >> r) | (n << (32 - r));
-}
-FMT_CONSTEXPR inline auto rotr(uint64_t n, uint32_t r) noexcept -> uint64_t {
-  r &= 63;
-  return (n >> r) | (n << (64 - r));
-}
-
-// Implementation of Dragonbox algorithm: https://github.com/jk-jeon/dragonbox.
-namespace dragonbox {
-// Computes upper 64 bits of multiplication of a 32-bit unsigned integer and a
-// 64-bit unsigned integer.
-inline auto umul96_upper64(uint32_t x, uint64_t y) noexcept -> uint64_t {
-  return umul128_upper64(static_cast<uint64_t>(x) << 32, y);
-}
-
-// Computes lower 128 bits of multiplication of a 64-bit unsigned integer and a
-// 128-bit unsigned integer.
-inline auto umul192_lower128(uint64_t x, uint128_fallback y) noexcept
-    -> uint128_fallback {
-  uint64_t high = x * y.high();
-  uint128_fallback high_low = umul128(x, y.low());
-  return {high + high_low.high(), high_low.low()};
-}
-
-// Computes lower 64 bits of multiplication of a 32-bit unsigned integer and a
-// 64-bit unsigned integer.
-inline auto umul96_lower64(uint32_t x, uint64_t y) noexcept -> uint64_t {
-  return x * y;
-}
-
-// Various fast log computations.
-inline auto floor_log10_pow2_minus_log10_4_over_3(int e) noexcept -> int {
-  FMT_ASSERT(e <= 2936 && e >= -2985, "too large exponent");
-  return (e * 631305 - 261663) >> 21;
-}
-
-FMT_INLINE_VARIABLE constexpr struct {
-  uint32_t divisor;
-  int shift_amount;
-} div_small_pow10_infos[] = {{10, 16}, {100, 16}};
-
-// Replaces n by floor(n / pow(10, N)) returning true if and only if n is
-// divisible by pow(10, N).
-// Precondition: n <= pow(10, N + 1).
-template <int N>
-auto check_divisibility_and_divide_by_pow10(uint32_t& n) noexcept -> bool {
-  // The numbers below are chosen such that:
-  //   1. floor(n/d) = floor(nm / 2^k) where d=10 or d=100,
-  //   2. nm mod 2^k < m if and only if n is divisible by d,
-  // where m is magic_number, k is shift_amount
-  // and d is divisor.
-  //
-  // Item 1 is a common technique of replacing division by a constant with
-  // multiplication, see e.g. "Division by Invariant Integers Using
-  // Multiplication" by Granlund and Montgomery (1994). magic_number (m) is set
-  // to ceil(2^k/d) for large enough k.
-  // The idea for item 2 originates from Schubfach.
-  constexpr auto info = div_small_pow10_infos[N - 1];
-  FMT_ASSERT(n <= info.divisor * 10, "n is too large");
-  constexpr uint32_t magic_number =
-      (1u << info.shift_amount) / info.divisor + 1;
-  n *= magic_number;
-  const uint32_t comparison_mask = (1u << info.shift_amount) - 1;
-  bool result = (n & comparison_mask) < magic_number;
-  n >>= info.shift_amount;
-  return result;
-}
-
-// Computes floor(n / pow(10, N)) for small n and N.
-// Precondition: n <= pow(10, N + 1).
-template <int N> auto small_division_by_pow10(uint32_t n) noexcept -> uint32_t {
-  constexpr auto info = div_small_pow10_infos[N - 1];
-  FMT_ASSERT(n <= info.divisor * 10, "n is too large");
-  constexpr uint32_t magic_number =
-      (1u << info.shift_amount) / info.divisor + 1;
-  return (n * magic_number) >> info.shift_amount;
-}
-
-// Computes floor(n / 10^(kappa + 1)) (float)
-inline auto divide_by_10_to_kappa_plus_1(uint32_t n) noexcept -> uint32_t {
-  // 1374389535 = ceil(2^37/100)
-  return static_cast<uint32_t>((static_cast<uint64_t>(n) * 1374389535) >> 37);
-}
-// Computes floor(n / 10^(kappa + 1)) (double)
-inline auto divide_by_10_to_kappa_plus_1(uint64_t n) noexcept -> uint64_t {
-  // 2361183241434822607 = ceil(2^(64+7)/1000)
-  return umul128_upper64(n, 2361183241434822607ull) >> 7;
-}
-
-// Various subroutines using pow10 cache
-template <typename T> struct cache_accessor;
-
-template <> struct cache_accessor<float> {
-  using carrier_uint = float_info<float>::carrier_uint;
-  using cache_entry_type = uint64_t;
-
-  static auto get_cached_power(int k) noexcept -> uint64_t {
-    FMT_ASSERT(k >= float_info<float>::min_k && k <= float_info<float>::max_k,
-               "k is out of range");
-    static constexpr const uint64_t pow10_significands[] = {
-        0x81ceb32c4b43fcf5, 0xa2425ff75e14fc32, 0xcad2f7f5359a3b3f,
-        0xfd87b5f28300ca0e, 0x9e74d1b791e07e49, 0xc612062576589ddb,
-        0xf79687aed3eec552, 0x9abe14cd44753b53, 0xc16d9a0095928a28,
-        0xf1c90080baf72cb2, 0x971da05074da7bef, 0xbce5086492111aeb,
-        0xec1e4a7db69561a6, 0x9392ee8e921d5d08, 0xb877aa3236a4b44a,
-        0xe69594bec44de15c, 0x901d7cf73ab0acda, 0xb424dc35095cd810,
-        0xe12e13424bb40e14, 0x8cbccc096f5088cc, 0xafebff0bcb24aaff,
-        0xdbe6fecebdedd5bf, 0x89705f4136b4a598, 0xabcc77118461cefd,
-        0xd6bf94d5e57a42bd, 0x8637bd05af6c69b6, 0xa7c5ac471b478424,
-        0xd1b71758e219652c, 0x83126e978d4fdf3c, 0xa3d70a3d70a3d70b,
-        0xcccccccccccccccd, 0x8000000000000000, 0xa000000000000000,
-        0xc800000000000000, 0xfa00000000000000, 0x9c40000000000000,
-        0xc350000000000000, 0xf424000000000000, 0x9896800000000000,
-        0xbebc200000000000, 0xee6b280000000000, 0x9502f90000000000,
-        0xba43b74000000000, 0xe8d4a51000000000, 0x9184e72a00000000,
-        0xb5e620f480000000, 0xe35fa931a0000000, 0x8e1bc9bf04000000,
-        0xb1a2bc2ec5000000, 0xde0b6b3a76400000, 0x8ac7230489e80000,
-        0xad78ebc5ac620000, 0xd8d726b7177a8000, 0x878678326eac9000,
-        0xa968163f0a57b400, 0xd3c21bcecceda100, 0x84595161401484a0,
-        0xa56fa5b99019a5c8, 0xcecb8f27f4200f3a, 0x813f3978f8940985,
-        0xa18f07d736b90be6, 0xc9f2c9cd04674edf, 0xfc6f7c4045812297,
-        0x9dc5ada82b70b59e, 0xc5371912364ce306, 0xf684df56c3e01bc7,
-        0x9a130b963a6c115d, 0xc097ce7bc90715b4, 0xf0bdc21abb48db21,
-        0x96769950b50d88f5, 0xbc143fa4e250eb32, 0xeb194f8e1ae525fe,
-        0x92efd1b8d0cf37bf, 0xb7abc627050305ae, 0xe596b7b0c643c71a,
-        0x8f7e32ce7bea5c70, 0xb35dbf821ae4f38c, 0xe0352f62a19e306f};
-    return pow10_significands[k - float_info<float>::min_k];
-  }
-
-  struct compute_mul_result {
-    carrier_uint result;
-    bool is_integer;
-  };
-  struct compute_mul_parity_result {
-    bool parity;
-    bool is_integer;
-  };
-
-  static auto compute_mul(carrier_uint u,
-                          const cache_entry_type& cache) noexcept
-      -> compute_mul_result {
-    auto r = umul96_upper64(u, cache);
-    return {static_cast<carrier_uint>(r >> 32),
-            static_cast<carrier_uint>(r) == 0};
-  }
-
-  static auto compute_delta(const cache_entry_type& cache, int beta) noexcept
-      -> uint32_t {
-    return static_cast<uint32_t>(cache >> (64 - 1 - beta));
-  }
-
-  static auto compute_mul_parity(carrier_uint two_f,
-                                 const cache_entry_type& cache,
-                                 int beta) noexcept
-      -> compute_mul_parity_result {
-    FMT_ASSERT(beta >= 1, "");
-    FMT_ASSERT(beta < 64, "");
-
-    auto r = umul96_lower64(two_f, cache);
-    return {((r >> (64 - beta)) & 1) != 0,
-            static_cast<uint32_t>(r >> (32 - beta)) == 0};
-  }
-
-  static auto compute_left_endpoint_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta) noexcept -> carrier_uint {
-    return static_cast<carrier_uint>(
-        (cache - (cache >> (num_significand_bits<float>() + 2))) >>
-        (64 - num_significand_bits<float>() - 1 - beta));
-  }
-
-  static auto compute_right_endpoint_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta) noexcept -> carrier_uint {
-    return static_cast<carrier_uint>(
-        (cache + (cache >> (num_significand_bits<float>() + 1))) >>
-        (64 - num_significand_bits<float>() - 1 - beta));
-  }
-
-  static auto compute_round_up_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta) noexcept -> carrier_uint {
-    return (static_cast<carrier_uint>(
-                cache >> (64 - num_significand_bits<float>() - 2 - beta)) +
-            1) /
-           2;
-  }
-};
-
-template <> struct cache_accessor<double> {
-  using carrier_uint = float_info<double>::carrier_uint;
-  using cache_entry_type = uint128_fallback;
-
-  static auto get_cached_power(int k) noexcept -> uint128_fallback {
-    FMT_ASSERT(k >= float_info<double>::min_k && k <= float_info<double>::max_k,
-               "k is out of range");
-
-    static constexpr const uint128_fallback pow10_significands[] = {
-#if FMT_USE_FULL_CACHE_DRAGONBOX
-      {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
-      {0x9faacf3df73609b1, 0x77b191618c54e9ad},
-      {0xc795830d75038c1d, 0xd59df5b9ef6a2418},
-      {0xf97ae3d0d2446f25, 0x4b0573286b44ad1e},
-      {0x9becce62836ac577, 0x4ee367f9430aec33},
-      {0xc2e801fb244576d5, 0x229c41f793cda740},
-      {0xf3a20279ed56d48a, 0x6b43527578c11110},
-      {0x9845418c345644d6, 0x830a13896b78aaaa},
-      {0xbe5691ef416bd60c, 0x23cc986bc656d554},
-      {0xedec366b11c6cb8f, 0x2cbfbe86b7ec8aa9},
-      {0x94b3a202eb1c3f39, 0x7bf7d71432f3d6aa},
-      {0xb9e08a83a5e34f07, 0xdaf5ccd93fb0cc54},
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-      {0x906a617d450187e2, 0x27fb2b80668b24c6},
-      {0xb484f9dc9641e9da, 0xb1f9f660802dedf7},
-      {0xe1a63853bbd26451, 0x5e7873f8a0396974},
-      {0x8d07e33455637eb2, 0xdb0b487b6423e1e9},
-      {0xb049dc016abc5e5f, 0x91ce1a9a3d2cda63},
-      {0xdc5c5301c56b75f7, 0x7641a140cc7810fc},
-      {0x89b9b3e11b6329ba, 0xa9e904c87fcb0a9e},
-      {0xac2820d9623bf429, 0x546345fa9fbdcd45},
-      {0xd732290fbacaf133, 0xa97c177947ad4096},
-      {0x867f59a9d4bed6c0, 0x49ed8eabcccc485e},
-      {0xa81f301449ee8c70, 0x5c68f256bfff5a75},
-      {0xd226fc195c6a2f8c, 0x73832eec6fff3112},
-      {0x83585d8fd9c25db7, 0xc831fd53c5ff7eac},
-      {0xa42e74f3d032f525, 0xba3e7ca8b77f5e56},
-      {0xcd3a1230c43fb26f, 0x28ce1bd2e55f35ec},
-      {0x80444b5e7aa7cf85, 0x7980d163cf5b81b4},
-      {0xa0555e361951c366, 0xd7e105bcc3326220},
-      {0xc86ab5c39fa63440, 0x8dd9472bf3fefaa8},
-      {0xfa856334878fc150, 0xb14f98f6f0feb952},
-      {0x9c935e00d4b9d8d2, 0x6ed1bf9a569f33d4},
-      {0xc3b8358109e84f07, 0x0a862f80ec4700c9},
-      {0xf4a642e14c6262c8, 0xcd27bb612758c0fb},
-      {0x98e7e9cccfbd7dbd, 0x8038d51cb897789d},
-      {0xbf21e44003acdd2c, 0xe0470a63e6bd56c4},
-      {0xeeea5d5004981478, 0x1858ccfce06cac75},
-      {0x95527a5202df0ccb, 0x0f37801e0c43ebc9},
-      {0xbaa718e68396cffd, 0xd30560258f54e6bb},
-      {0xe950df20247c83fd, 0x47c6b82ef32a206a},
-      {0x91d28b7416cdd27e, 0x4cdc331d57fa5442},
-      {0xb6472e511c81471d, 0xe0133fe4adf8e953},
-      {0xe3d8f9e563a198e5, 0x58180fddd97723a7},
-      {0x8e679c2f5e44ff8f, 0x570f09eaa7ea7649},
-      {0xb201833b35d63f73, 0x2cd2cc6551e513db},
-      {0xde81e40a034bcf4f, 0xf8077f7ea65e58d2},
-      {0x8b112e86420f6191, 0xfb04afaf27faf783},
-      {0xadd57a27d29339f6, 0x79c5db9af1f9b564},
-      {0xd94ad8b1c7380874, 0x18375281ae7822bd},
-      {0x87cec76f1c830548, 0x8f2293910d0b15b6},
-      {0xa9c2794ae3a3c69a, 0xb2eb3875504ddb23},
-      {0xd433179d9c8cb841, 0x5fa60692a46151ec},
-      {0x849feec281d7f328, 0xdbc7c41ba6bcd334},
-      {0xa5c7ea73224deff3, 0x12b9b522906c0801},
-      {0xcf39e50feae16bef, 0xd768226b34870a01},
-      {0x81842f29f2cce375, 0xe6a1158300d46641},
-      {0xa1e53af46f801c53, 0x60495ae3c1097fd1},
-      {0xca5e89b18b602368, 0x385bb19cb14bdfc5},
-      {0xfcf62c1dee382c42, 0x46729e03dd9ed7b6},
-      {0x9e19db92b4e31ba9, 0x6c07a2c26a8346d2},
-      {0xc5a05277621be293, 0xc7098b7305241886},
-      {0xf70867153aa2db38, 0xb8cbee4fc66d1ea8},
-      {0x9a65406d44a5c903, 0x737f74f1dc043329},
-      {0xc0fe908895cf3b44, 0x505f522e53053ff3},
-      {0xf13e34aabb430a15, 0x647726b9e7c68ff0},
-      {0x96c6e0eab509e64d, 0x5eca783430dc19f6},
-      {0xbc789925624c5fe0, 0xb67d16413d132073},
-      {0xeb96bf6ebadf77d8, 0xe41c5bd18c57e890},
-      {0x933e37a534cbaae7, 0x8e91b962f7b6f15a},
-      {0xb80dc58e81fe95a1, 0x723627bbb5a4adb1},
-      {0xe61136f2227e3b09, 0xcec3b1aaa30dd91d},
-      {0x8fcac257558ee4e6, 0x213a4f0aa5e8a7b2},
-      {0xb3bd72ed2af29e1f, 0xa988e2cd4f62d19e},
-      {0xe0accfa875af45a7, 0x93eb1b80a33b8606},
-      {0x8c6c01c9498d8b88, 0xbc72f130660533c4},
-      {0xaf87023b9bf0ee6a, 0xeb8fad7c7f8680b5},
-      {0xdb68c2ca82ed2a05, 0xa67398db9f6820e2},
-#else
-      {0xff77b1fcbebcdc4f, 0x25e8e89c13bb0f7b},
-      {0xce5d73ff402d98e3, 0xfb0a3d212dc81290},
-      {0xa6b34ad8c9dfc06f, 0xf42faa48c0ea481f},
-      {0x86a8d39ef77164bc, 0xae5dff9c02033198},
-      {0xd98ddaee19068c76, 0x3badd624dd9b0958},
-      {0xafbd2350644eeacf, 0xe5d1929ef90898fb},
-      {0x8df5efabc5979c8f, 0xca8d3ffa1ef463c2},
-      {0xe55990879ddcaabd, 0xcc420a6a101d0516},
-      {0xb94470938fa89bce, 0xf808e40e8d5b3e6a},
-      {0x95a8637627989aad, 0xdde7001379a44aa9},
-      {0xf1c90080baf72cb1, 0x5324c68b12dd6339},
-      {0xc350000000000000, 0x0000000000000000},
-      {0x9dc5ada82b70b59d, 0xf020000000000000},
-      {0xfee50b7025c36a08, 0x02f236d04753d5b5},
-      {0xcde6fd5e09abcf26, 0xed4c0226b55e6f87},
-      {0xa6539930bf6bff45, 0x84db8346b786151d},
-      {0x865b86925b9bc5c2, 0x0b8a2392ba45a9b3},
-      {0xd910f7ff28069da4, 0x1b2ba1518094da05},
-      {0xaf58416654a6babb, 0x387ac8d1970027b3},
-      {0x8da471a9de737e24, 0x5ceaecfed289e5d3},
-      {0xe4d5e82392a40515, 0x0fabaf3feaa5334b},
-      {0xb8da1662e7b00a17, 0x3d6a751f3b936244},
-      {0x95527a5202df0ccb, 0x0f37801e0c43ebc9},
-      {0xf13e34aabb430a15, 0x647726b9e7c68ff0}
-#endif
-    };
-
-#if FMT_USE_FULL_CACHE_DRAGONBOX
-    return pow10_significands[k - float_info<double>::min_k];
-#else
-    static constexpr const uint64_t powers_of_5_64[] = {
-        0x0000000000000001, 0x0000000000000005, 0x0000000000000019,
-        0x000000000000007d, 0x0000000000000271, 0x0000000000000c35,
-        0x0000000000003d09, 0x000000000001312d, 0x000000000005f5e1,
-        0x00000000001dcd65, 0x00000000009502f9, 0x0000000002e90edd,
-        0x000000000e8d4a51, 0x0000000048c27395, 0x000000016bcc41e9,
-        0x000000071afd498d, 0x0000002386f26fc1, 0x000000b1a2bc2ec5,
-        0x000003782dace9d9, 0x00001158e460913d, 0x000056bc75e2d631,
-        0x0001b1ae4d6e2ef5, 0x000878678326eac9, 0x002a5a058fc295ed,
-        0x00d3c21bcecceda1, 0x0422ca8b0a00a425, 0x14adf4b7320334b9};
-
-    static const int compression_ratio = 27;
-
-    // Compute base index.
-    int cache_index = (k - float_info<double>::min_k) / compression_ratio;
-    int kb = cache_index * compression_ratio + float_info<double>::min_k;
-    int offset = k - kb;
-
-    // Get base cache.
-    uint128_fallback base_cache = pow10_significands[cache_index];
-    if (offset == 0) return base_cache;
-
-    // Compute the required amount of bit-shift.
-    int alpha = floor_log2_pow10(kb + offset) - floor_log2_pow10(kb) - offset;
-    FMT_ASSERT(alpha > 0 && alpha < 64, "shifting error detected");
-
-    // Try to recover the real cache.
-    uint64_t pow5 = powers_of_5_64[offset];
-    uint128_fallback recovered_cache = umul128(base_cache.high(), pow5);
-    uint128_fallback middle_low = umul128(base_cache.low(), pow5);
-
-    recovered_cache += middle_low.high();
-
-    uint64_t high_to_middle = recovered_cache.high() << (64 - alpha);
-    uint64_t middle_to_low = recovered_cache.low() << (64 - alpha);
-
-    recovered_cache =
-        uint128_fallback{(recovered_cache.low() >> alpha) | high_to_middle,
-                         ((middle_low.low() >> alpha) | middle_to_low)};
-    FMT_ASSERT(recovered_cache.low() + 1 != 0, "");
-    return {recovered_cache.high(), recovered_cache.low() + 1};
-#endif
-  }
-
-  struct compute_mul_result {
-    carrier_uint result;
-    bool is_integer;
-  };
-  struct compute_mul_parity_result {
-    bool parity;
-    bool is_integer;
-  };
-
-  static auto compute_mul(carrier_uint u,
-                          const cache_entry_type& cache) noexcept
-      -> compute_mul_result {
-    auto r = umul192_upper128(u, cache);
-    return {r.high(), r.low() == 0};
-  }
-
-  static auto compute_delta(cache_entry_type const& cache, int beta) noexcept
-      -> uint32_t {
-    return static_cast<uint32_t>(cache.high() >> (64 - 1 - beta));
-  }
-
-  static auto compute_mul_parity(carrier_uint two_f,
-                                 const cache_entry_type& cache,
-                                 int beta) noexcept
-      -> compute_mul_parity_result {
-    FMT_ASSERT(beta >= 1, "");
-    FMT_ASSERT(beta < 64, "");
-
-    auto r = umul192_lower128(two_f, cache);
-    return {((r.high() >> (64 - beta)) & 1) != 0,
-            ((r.high() << beta) | (r.low() >> (64 - beta))) == 0};
-  }
-
-  static auto compute_left_endpoint_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta) noexcept -> carrier_uint {
-    return (cache.high() -
-            (cache.high() >> (num_significand_bits<double>() + 2))) >>
-           (64 - num_significand_bits<double>() - 1 - beta);
-  }
-
-  static auto compute_right_endpoint_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta) noexcept -> carrier_uint {
-    return (cache.high() +
-            (cache.high() >> (num_significand_bits<double>() + 1))) >>
-           (64 - num_significand_bits<double>() - 1 - beta);
-  }
-
-  static auto compute_round_up_for_shorter_interval_case(
-      const cache_entry_type& cache, int beta) noexcept -> carrier_uint {
-    return ((cache.high() >> (64 - num_significand_bits<double>() - 2 - beta)) +
-            1) /
-           2;
-  }
-};
-
-FMT_FUNC auto get_cached_power(int k) noexcept -> uint128_fallback {
-  return cache_accessor<double>::get_cached_power(k);
-}
-
-// Various integer checks
-template <typename T>
-auto is_left_endpoint_integer_shorter_interval(int exponent) noexcept -> bool {
-  const int case_shorter_interval_left_endpoint_lower_threshold = 2;
-  const int case_shorter_interval_left_endpoint_upper_threshold = 3;
-  return exponent >= case_shorter_interval_left_endpoint_lower_threshold &&
-         exponent <= case_shorter_interval_left_endpoint_upper_threshold;
-}
-
-// Remove trailing zeros from n and return the number of zeros removed (float)
-FMT_INLINE int remove_trailing_zeros(uint32_t& n, int s = 0) noexcept {
-  FMT_ASSERT(n != 0, "");
-  // Modular inverse of 5 (mod 2^32): (mod_inv_5 * 5) mod 2^32 = 1.
-  constexpr uint32_t mod_inv_5 = 0xcccccccd;
-  constexpr uint32_t mod_inv_25 = 0xc28f5c29;  // = mod_inv_5 * mod_inv_5
-
-  while (true) {
-    auto q = rotr(n * mod_inv_25, 2);
-    if (q > max_value<uint32_t>() / 100) break;
-    n = q;
-    s += 2;
-  }
-  auto q = rotr(n * mod_inv_5, 1);
-  if (q <= max_value<uint32_t>() / 10) {
-    n = q;
-    s |= 1;
-  }
-  return s;
-}
-
-// Removes trailing zeros and returns the number of zeros removed (double)
-FMT_INLINE int remove_trailing_zeros(uint64_t& n) noexcept {
-  FMT_ASSERT(n != 0, "");
-
-  // This magic number is ceil(2^90 / 10^8).
-  constexpr uint64_t magic_number = 12379400392853802749ull;
-  auto nm = umul128(n, magic_number);
-
-  // Is n is divisible by 10^8?
-  if ((nm.high() & ((1ull << (90 - 64)) - 1)) == 0 && nm.low() < magic_number) {
-    // If yes, work with the quotient...
-    auto n32 = static_cast<uint32_t>(nm.high() >> (90 - 64));
-    // ... and use the 32 bit variant of the function
-    int s = remove_trailing_zeros(n32, 8);
-    n = n32;
-    return s;
-  }
-
-  // If n is not divisible by 10^8, work with n itself.
-  constexpr uint64_t mod_inv_5 = 0xcccccccccccccccd;
-  constexpr uint64_t mod_inv_25 = 0x8f5c28f5c28f5c29;  // mod_inv_5 * mod_inv_5
-
-  int s = 0;
-  while (true) {
-    auto q = rotr(n * mod_inv_25, 2);
-    if (q > max_value<uint64_t>() / 100) break;
-    n = q;
-    s += 2;
-  }
-  auto q = rotr(n * mod_inv_5, 1);
-  if (q <= max_value<uint64_t>() / 10) {
-    n = q;
-    s |= 1;
-  }
-
-  return s;
-}
-
-// The main algorithm for shorter interval case
-template <typename T>
-FMT_INLINE decimal_fp<T> shorter_interval_case(int exponent) noexcept {
-  decimal_fp<T> ret_value;
-  // Compute k and beta
-  const int minus_k = floor_log10_pow2_minus_log10_4_over_3(exponent);
-  const int beta = exponent + floor_log2_pow10(-minus_k);
-
-  // Compute xi and zi
-  using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
-  const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
-
-  auto xi = cache_accessor<T>::compute_left_endpoint_for_shorter_interval_case(
-      cache, beta);
-  auto zi = cache_accessor<T>::compute_right_endpoint_for_shorter_interval_case(
-      cache, beta);
-
-  // If the left endpoint is not an integer, increase it
-  if (!is_left_endpoint_integer_shorter_interval<T>(exponent)) ++xi;
-
-  // Try bigger divisor
-  ret_value.significand = zi / 10;
-
-  // If succeed, remove trailing zeros if necessary and return
-  if (ret_value.significand * 10 >= xi) {
-    ret_value.exponent = minus_k + 1;
-    ret_value.exponent += remove_trailing_zeros(ret_value.significand);
-    return ret_value;
-  }
-
-  // Otherwise, compute the round-up of y
-  ret_value.significand =
-      cache_accessor<T>::compute_round_up_for_shorter_interval_case(cache,
-                                                                    beta);
-  ret_value.exponent = minus_k;
-
-  // When tie occurs, choose one of them according to the rule
-  if (exponent >= float_info<T>::shorter_interval_tie_lower_threshold &&
-      exponent <= float_info<T>::shorter_interval_tie_upper_threshold) {
-    ret_value.significand = ret_value.significand % 2 == 0
-                                ? ret_value.significand
-                                : ret_value.significand - 1;
-  } else if (ret_value.significand < xi) {
-    ++ret_value.significand;
-  }
-  return ret_value;
-}
-
-template <typename T> auto to_decimal(T x) noexcept -> decimal_fp<T> {
-  // Step 1: integer promotion & Schubfach multiplier calculation.
-
-  using carrier_uint = typename float_info<T>::carrier_uint;
-  using cache_entry_type = typename cache_accessor<T>::cache_entry_type;
-  auto br = bit_cast<carrier_uint>(x);
-
-  // Extract significand bits and exponent bits.
-  const carrier_uint significand_mask =
-      (static_cast<carrier_uint>(1) << num_significand_bits<T>()) - 1;
-  carrier_uint significand = (br & significand_mask);
-  int exponent =
-      static_cast<int>((br & exponent_mask<T>()) >> num_significand_bits<T>());
-
-  if (exponent != 0) {  // Check if normal.
-    exponent -= exponent_bias<T>() + num_significand_bits<T>();
-
-    // Shorter interval case; proceed like Schubfach.
-    // In fact, when exponent == 1 and significand == 0, the interval is
-    // regular. However, it can be shown that the end-results are anyway same.
-    if (significand == 0) return shorter_interval_case<T>(exponent);
-
-    significand |= (static_cast<carrier_uint>(1) << num_significand_bits<T>());
-  } else {
-    // Subnormal case; the interval is always regular.
-    if (significand == 0) return {0, 0};
-    exponent =
-        std::numeric_limits<T>::min_exponent - num_significand_bits<T>() - 1;
-  }
-
-  const bool include_left_endpoint = (significand % 2 == 0);
-  const bool include_right_endpoint = include_left_endpoint;
-
-  // Compute k and beta.
-  const int minus_k = floor_log10_pow2(exponent) - float_info<T>::kappa;
-  const cache_entry_type cache = cache_accessor<T>::get_cached_power(-minus_k);
-  const int beta = exponent + floor_log2_pow10(-minus_k);
-
-  // Compute zi and deltai.
-  // 10^kappa <= deltai < 10^(kappa + 1)
-  const uint32_t deltai = cache_accessor<T>::compute_delta(cache, beta);
-  const carrier_uint two_fc = significand << 1;
-
-  // For the case of binary32, the result of integer check is not correct for
-  // 29711844 * 2^-82
-  // = 6.1442653300000000008655037797566933477355632930994033813476... * 10^-18
-  // and 29711844 * 2^-81
-  // = 1.2288530660000000001731007559513386695471126586198806762695... * 10^-17,
-  // and they are the unique counterexamples. However, since 29711844 is even,
-  // this does not cause any problem for the endpoints calculations; it can only
-  // cause a problem when we need to perform integer check for the center.
-  // Fortunately, with these inputs, that branch is never executed, so we are
-  // fine.
-  const typename cache_accessor<T>::compute_mul_result z_mul =
-      cache_accessor<T>::compute_mul((two_fc | 1) << beta, cache);
-
-  // Step 2: Try larger divisor; remove trailing zeros if necessary.
-
-  // Using an upper bound on zi, we might be able to optimize the division
-  // better than the compiler; we are computing zi / big_divisor here.
-  decimal_fp<T> ret_value;
-  ret_value.significand = divide_by_10_to_kappa_plus_1(z_mul.result);
-  uint32_t r = static_cast<uint32_t>(z_mul.result - float_info<T>::big_divisor *
-                                                        ret_value.significand);
-
-  if (r < deltai) {
-    // Exclude the right endpoint if necessary.
-    if (r == 0 && (z_mul.is_integer & !include_right_endpoint)) {
-      --ret_value.significand;
-      r = float_info<T>::big_divisor;
-      goto small_divisor_case_label;
-    }
-  } else if (r > deltai) {
-    goto small_divisor_case_label;
-  } else {
-    // r == deltai; compare fractional parts.
-    const typename cache_accessor<T>::compute_mul_parity_result x_mul =
-        cache_accessor<T>::compute_mul_parity(two_fc - 1, cache, beta);
-
-    if (!(x_mul.parity | (x_mul.is_integer & include_left_endpoint)))
-      goto small_divisor_case_label;
-  }
-  ret_value.exponent = minus_k + float_info<T>::kappa + 1;
-
-  // We may need to remove trailing zeros.
-  ret_value.exponent += remove_trailing_zeros(ret_value.significand);
-  return ret_value;
-
-  // Step 3: Find the significand with the smaller divisor.
-
-small_divisor_case_label:
-  ret_value.significand *= 10;
-  ret_value.exponent = minus_k + float_info<T>::kappa;
-
-  uint32_t dist = r - (deltai / 2) + (float_info<T>::small_divisor / 2);
-  const bool approx_y_parity =
-      ((dist ^ (float_info<T>::small_divisor / 2)) & 1) != 0;
-
-  // Is dist divisible by 10^kappa?
-  const bool divisible_by_small_divisor =
-      check_divisibility_and_divide_by_pow10<float_info<T>::kappa>(dist);
-
-  // Add dist / 10^kappa to the significand.
-  ret_value.significand += dist;
-
-  if (!divisible_by_small_divisor) return ret_value;
-
-  // Check z^(f) >= epsilon^(f).
-  // We have either yi == zi - epsiloni or yi == (zi - epsiloni) - 1,
-  // where yi == zi - epsiloni if and only if z^(f) >= epsilon^(f).
-  // Since there are only 2 possibilities, we only need to care about the
-  // parity. Also, zi and r should have the same parity since the divisor
-  // is an even number.
-  const auto y_mul = cache_accessor<T>::compute_mul_parity(two_fc, cache, beta);
-
-  // If z^(f) >= epsilon^(f), we might have a tie when z^(f) == epsilon^(f),
-  // or equivalently, when y is an integer.
-  if (y_mul.parity != approx_y_parity)
-    --ret_value.significand;
-  else if (y_mul.is_integer & (ret_value.significand % 2 != 0))
-    --ret_value.significand;
-  return ret_value;
-}
-}  // namespace dragonbox
-}  // namespace detail
-
-template <> struct formatter<detail::bigint> {
-  FMT_CONSTEXPR auto parse(format_parse_context& ctx)
-      -> format_parse_context::iterator {
-    return ctx.begin();
-  }
-
-  auto format(const detail::bigint& n, format_context& ctx) const
-      -> format_context::iterator {
-    auto out = ctx.out();
-    bool first = true;
-    for (auto i = n.bigits_.size(); i > 0; --i) {
-      auto value = n.bigits_[i - 1u];
-      if (first) {
-        out = fmt::format_to(out, FMT_STRING("{:x}"), value);
-        first = false;
-        continue;
-      }
-      out = fmt::format_to(out, FMT_STRING("{:08x}"), value);
-    }
-    if (n.exp_ > 0)
-      out = fmt::format_to(out, FMT_STRING("p{}"),
-                           n.exp_ * detail::bigint::bigit_bits);
-    return out;
-  }
-};
-
-FMT_FUNC detail::utf8_to_utf16::utf8_to_utf16(string_view s) {
-  for_each_codepoint(s, [this](uint32_t cp, string_view) {
-    if (cp == invalid_code_point) FMT_THROW(std::runtime_error("invalid utf8"));
-    if (cp <= 0xFFFF) {
-      buffer_.push_back(static_cast<wchar_t>(cp));
-    } else {
-      cp -= 0x10000;
-      buffer_.push_back(static_cast<wchar_t>(0xD800 + (cp >> 10)));
-      buffer_.push_back(static_cast<wchar_t>(0xDC00 + (cp & 0x3FF)));
-    }
-    return true;
-  });
-  buffer_.push_back(0);
-}
-
-FMT_FUNC void format_system_error(detail::buffer<char>& out, int error_code,
-                                  const char* message) noexcept {
-  FMT_TRY {
-    auto ec = std::error_code(error_code, std::generic_category());
-    write(std::back_inserter(out), std::system_error(ec, message).what());
-    return;
-  }
-  FMT_CATCH(...) {}
-  format_error_code(out, error_code, message);
-}
-
-FMT_FUNC void report_system_error(int error_code,
-                                  const char* message) noexcept {
-  report_error(format_system_error, error_code, message);
-}
-
-FMT_FUNC auto vformat(string_view fmt, format_args args) -> std::string {
-  // Don't optimize the "{}" case to keep the binary size small and because it
-  // can be better optimized in fmt::format anyway.
-  auto buffer = memory_buffer();
-  detail::vformat_to(buffer, fmt, args);
-  return to_string(buffer);
-}
-
-namespace detail {
-#if !defined(_WIN32) || defined(FMT_WINDOWS_NO_WCHAR)
-FMT_FUNC auto write_console(int, string_view) -> bool { return false; }
-FMT_FUNC auto write_console(std::FILE*, string_view) -> bool { return false; }
-#else
-using dword = conditional_t<sizeof(long) == 4, unsigned long, unsigned>;
-extern "C" __declspec(dllimport) int __stdcall WriteConsoleW(  //
-    void*, const void*, dword, dword*, void*);
-
-FMT_FUNC bool write_console(int fd, string_view text) {
-  auto u16 = utf8_to_utf16(text);
-  return WriteConsoleW(reinterpret_cast<void*>(_get_osfhandle(fd)), u16.c_str(),
-                       static_cast<dword>(u16.size()), nullptr, nullptr) != 0;
-}
-
-FMT_FUNC auto write_console(std::FILE* f, string_view text) -> bool {
-  return write_console(_fileno(f), text);
-}
-#endif
-
-#ifdef _WIN32
-// Print assuming legacy (non-Unicode) encoding.
-FMT_FUNC void vprint_mojibake(std::FILE* f, string_view fmt, format_args args) {
-  auto buffer = memory_buffer();
-  detail::vformat_to(buffer, fmt, args);
-  fwrite_fully(buffer.data(), buffer.size(), f);
-}
-#endif
-
-FMT_FUNC void print(std::FILE* f, string_view text) {
-#ifdef _WIN32
-  int fd = _fileno(f);
-  if (_isatty(fd)) {
-    std::fflush(f);
-    if (write_console(fd, text)) return;
-  }
-#endif
-  fwrite_fully(text.data(), text.size(), f);
-}
-}  // namespace detail
-
-FMT_FUNC void vprint(std::FILE* f, string_view fmt, format_args args) {
-  auto buffer = memory_buffer();
-  detail::vformat_to(buffer, fmt, args);
-  detail::print(f, {buffer.data(), buffer.size()});
-}
-
-FMT_FUNC void vprint(string_view fmt, format_args args) {
-  vprint(stdout, fmt, args);
-}
-
-namespace detail {
-
-struct singleton {
-  unsigned char upper;
-  unsigned char lower_count;
-};
-
-inline auto is_printable(uint16_t x, const singleton* singletons,
-                         size_t singletons_size,
-                         const unsigned char* singleton_lowers,
-                         const unsigned char* normal, size_t normal_size)
-    -> bool {
-  auto upper = x >> 8;
-  auto lower_start = 0;
-  for (size_t i = 0; i < singletons_size; ++i) {
-    auto s = singletons[i];
-    auto lower_end = lower_start + s.lower_count;
-    if (upper < s.upper) break;
-    if (upper == s.upper) {
-      for (auto j = lower_start; j < lower_end; ++j) {
-        if (singleton_lowers[j] == (x & 0xff)) return false;
-      }
-    }
-    lower_start = lower_end;
-  }
-
-  auto xsigned = static_cast<int>(x);
-  auto current = true;
-  for (size_t i = 0; i < normal_size; ++i) {
-    auto v = static_cast<int>(normal[i]);
-    auto len = (v & 0x80) != 0 ? (v & 0x7f) << 8 | normal[++i] : v;
-    xsigned -= len;
-    if (xsigned < 0) break;
-    current = !current;
-  }
-  return current;
-}
-
-// This code is generated by support/printable.py.
-FMT_FUNC auto is_printable(uint32_t cp) -> bool {
-  static constexpr singleton singletons0[] = {
-      {0x00, 1},  {0x03, 5},  {0x05, 6},  {0x06, 3},  {0x07, 6},  {0x08, 8},
-      {0x09, 17}, {0x0a, 28}, {0x0b, 25}, {0x0c, 20}, {0x0d, 16}, {0x0e, 13},
-      {0x0f, 4},  {0x10, 3},  {0x12, 18}, {0x13, 9},  {0x16, 1},  {0x17, 5},
-      {0x18, 2},  {0x19, 3},  {0x1a, 7},  {0x1c, 2},  {0x1d, 1},  {0x1f, 22},
-      {0x20, 3},  {0x2b, 3},  {0x2c, 2},  {0x2d, 11}, {0x2e, 1},  {0x30, 3},
-      {0x31, 2},  {0x32, 1},  {0xa7, 2},  {0xa9, 2},  {0xaa, 4},  {0xab, 8},
-      {0xfa, 2},  {0xfb, 5},  {0xfd, 4},  {0xfe, 3},  {0xff, 9},
-  };
-  static constexpr unsigned char singletons0_lower[] = {
-      0xad, 0x78, 0x79, 0x8b, 0x8d, 0xa2, 0x30, 0x57, 0x58, 0x8b, 0x8c, 0x90,
-      0x1c, 0x1d, 0xdd, 0x0e, 0x0f, 0x4b, 0x4c, 0xfb, 0xfc, 0x2e, 0x2f, 0x3f,
-      0x5c, 0x5d, 0x5f, 0xb5, 0xe2, 0x84, 0x8d, 0x8e, 0x91, 0x92, 0xa9, 0xb1,
-      0xba, 0xbb, 0xc5, 0xc6, 0xc9, 0xca, 0xde, 0xe4, 0xe5, 0xff, 0x00, 0x04,
-      0x11, 0x12, 0x29, 0x31, 0x34, 0x37, 0x3a, 0x3b, 0x3d, 0x49, 0x4a, 0x5d,
-      0x84, 0x8e, 0x92, 0xa9, 0xb1, 0xb4, 0xba, 0xbb, 0xc6, 0xca, 0xce, 0xcf,
-      0xe4, 0xe5, 0x00, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
-      0x3b, 0x45, 0x46, 0x49, 0x4a, 0x5e, 0x64, 0x65, 0x84, 0x91, 0x9b, 0x9d,
-      0xc9, 0xce, 0xcf, 0x0d, 0x11, 0x29, 0x45, 0x49, 0x57, 0x64, 0x65, 0x8d,
-      0x91, 0xa9, 0xb4, 0xba, 0xbb, 0xc5, 0xc9, 0xdf, 0xe4, 0xe5, 0xf0, 0x0d,
-      0x11, 0x45, 0x49, 0x64, 0x65, 0x80, 0x84, 0xb2, 0xbc, 0xbe, 0xbf, 0xd5,
-      0xd7, 0xf0, 0xf1, 0x83, 0x85, 0x8b, 0xa4, 0xa6, 0xbe, 0xbf, 0xc5, 0xc7,
-      0xce, 0xcf, 0xda, 0xdb, 0x48, 0x98, 0xbd, 0xcd, 0xc6, 0xce, 0xcf, 0x49,
-      0x4e, 0x4f, 0x57, 0x59, 0x5e, 0x5f, 0x89, 0x8e, 0x8f, 0xb1, 0xb6, 0xb7,
-      0xbf, 0xc1, 0xc6, 0xc7, 0xd7, 0x11, 0x16, 0x17, 0x5b, 0x5c, 0xf6, 0xf7,
-      0xfe, 0xff, 0x80, 0x0d, 0x6d, 0x71, 0xde, 0xdf, 0x0e, 0x0f, 0x1f, 0x6e,
-      0x6f, 0x1c, 0x1d, 0x5f, 0x7d, 0x7e, 0xae, 0xaf, 0xbb, 0xbc, 0xfa, 0x16,
-      0x17, 0x1e, 0x1f, 0x46, 0x47, 0x4e, 0x4f, 0x58, 0x5a, 0x5c, 0x5e, 0x7e,
-      0x7f, 0xb5, 0xc5, 0xd4, 0xd5, 0xdc, 0xf0, 0xf1, 0xf5, 0x72, 0x73, 0x8f,
-      0x74, 0x75, 0x96, 0x2f, 0x5f, 0x26, 0x2e, 0x2f, 0xa7, 0xaf, 0xb7, 0xbf,
-      0xc7, 0xcf, 0xd7, 0xdf, 0x9a, 0x40, 0x97, 0x98, 0x30, 0x8f, 0x1f, 0xc0,
-      0xc1, 0xce, 0xff, 0x4e, 0x4f, 0x5a, 0x5b, 0x07, 0x08, 0x0f, 0x10, 0x27,
-      0x2f, 0xee, 0xef, 0x6e, 0x6f, 0x37, 0x3d, 0x3f, 0x42, 0x45, 0x90, 0x91,
-      0xfe, 0xff, 0x53, 0x67, 0x75, 0xc8, 0xc9, 0xd0, 0xd1, 0xd8, 0xd9, 0xe7,
-      0xfe, 0xff,
-  };
-  static constexpr singleton singletons1[] = {
-      {0x00, 6},  {0x01, 1}, {0x03, 1},  {0x04, 2}, {0x08, 8},  {0x09, 2},
-      {0x0a, 5},  {0x0b, 2}, {0x0e, 4},  {0x10, 1}, {0x11, 2},  {0x12, 5},
-      {0x13, 17}, {0x14, 1}, {0x15, 2},  {0x17, 2}, {0x19, 13}, {0x1c, 5},
-      {0x1d, 8},  {0x24, 1}, {0x6a, 3},  {0x6b, 2}, {0xbc, 2},  {0xd1, 2},
-      {0xd4, 12}, {0xd5, 9}, {0xd6, 2},  {0xd7, 2}, {0xda, 1},  {0xe0, 5},
-      {0xe1, 2},  {0xe8, 2}, {0xee, 32}, {0xf0, 4}, {0xf8, 2},  {0xf9, 2},
-      {0xfa, 2},  {0xfb, 1},
-  };
-  static constexpr unsigned char singletons1_lower[] = {
-      0x0c, 0x27, 0x3b, 0x3e, 0x4e, 0x4f, 0x8f, 0x9e, 0x9e, 0x9f, 0x06, 0x07,
-      0x09, 0x36, 0x3d, 0x3e, 0x56, 0xf3, 0xd0, 0xd1, 0x04, 0x14, 0x18, 0x36,
-      0x37, 0x56, 0x57, 0x7f, 0xaa, 0xae, 0xaf, 0xbd, 0x35, 0xe0, 0x12, 0x87,
-      0x89, 0x8e, 0x9e, 0x04, 0x0d, 0x0e, 0x11, 0x12, 0x29, 0x31, 0x34, 0x3a,
-      0x45, 0x46, 0x49, 0x4a, 0x4e, 0x4f, 0x64, 0x65, 0x5c, 0xb6, 0xb7, 0x1b,
-      0x1c, 0x07, 0x08, 0x0a, 0x0b, 0x14, 0x17, 0x36, 0x39, 0x3a, 0xa8, 0xa9,
-      0xd8, 0xd9, 0x09, 0x37, 0x90, 0x91, 0xa8, 0x07, 0x0a, 0x3b, 0x3e, 0x66,
-      0x69, 0x8f, 0x92, 0x6f, 0x5f, 0xee, 0xef, 0x5a, 0x62, 0x9a, 0x9b, 0x27,
-      0x28, 0x55, 0x9d, 0xa0, 0xa1, 0xa3, 0xa4, 0xa7, 0xa8, 0xad, 0xba, 0xbc,
-      0xc4, 0x06, 0x0b, 0x0c, 0x15, 0x1d, 0x3a, 0x3f, 0x45, 0x51, 0xa6, 0xa7,
-      0xcc, 0xcd, 0xa0, 0x07, 0x19, 0x1a, 0x22, 0x25, 0x3e, 0x3f, 0xc5, 0xc6,
-      0x04, 0x20, 0x23, 0x25, 0x26, 0x28, 0x33, 0x38, 0x3a, 0x48, 0x4a, 0x4c,
-      0x50, 0x53, 0x55, 0x56, 0x58, 0x5a, 0x5c, 0x5e, 0x60, 0x63, 0x65, 0x66,
-      0x6b, 0x73, 0x78, 0x7d, 0x7f, 0x8a, 0xa4, 0xaa, 0xaf, 0xb0, 0xc0, 0xd0,
-      0xae, 0xaf, 0x79, 0xcc, 0x6e, 0x6f, 0x93,
-  };
-  static constexpr unsigned char normal0[] = {
-      0x00, 0x20, 0x5f, 0x22, 0x82, 0xdf, 0x04, 0x82, 0x44, 0x08, 0x1b, 0x04,
-      0x06, 0x11, 0x81, 0xac, 0x0e, 0x80, 0xab, 0x35, 0x28, 0x0b, 0x80, 0xe0,
-      0x03, 0x19, 0x08, 0x01, 0x04, 0x2f, 0x04, 0x34, 0x04, 0x07, 0x03, 0x01,
-      0x07, 0x06, 0x07, 0x11, 0x0a, 0x50, 0x0f, 0x12, 0x07, 0x55, 0x07, 0x03,
-      0x04, 0x1c, 0x0a, 0x09, 0x03, 0x08, 0x03, 0x07, 0x03, 0x02, 0x03, 0x03,
-      0x03, 0x0c, 0x04, 0x05, 0x03, 0x0b, 0x06, 0x01, 0x0e, 0x15, 0x05, 0x3a,
-      0x03, 0x11, 0x07, 0x06, 0x05, 0x10, 0x07, 0x57, 0x07, 0x02, 0x07, 0x15,
-      0x0d, 0x50, 0x04, 0x43, 0x03, 0x2d, 0x03, 0x01, 0x04, 0x11, 0x06, 0x0f,
-      0x0c, 0x3a, 0x04, 0x1d, 0x25, 0x5f, 0x20, 0x6d, 0x04, 0x6a, 0x25, 0x80,
-      0xc8, 0x05, 0x82, 0xb0, 0x03, 0x1a, 0x06, 0x82, 0xfd, 0x03, 0x59, 0x07,
-      0x15, 0x0b, 0x17, 0x09, 0x14, 0x0c, 0x14, 0x0c, 0x6a, 0x06, 0x0a, 0x06,
-      0x1a, 0x06, 0x59, 0x07, 0x2b, 0x05, 0x46, 0x0a, 0x2c, 0x04, 0x0c, 0x04,
-      0x01, 0x03, 0x31, 0x0b, 0x2c, 0x04, 0x1a, 0x06, 0x0b, 0x03, 0x80, 0xac,
-      0x06, 0x0a, 0x06, 0x21, 0x3f, 0x4c, 0x04, 0x2d, 0x03, 0x74, 0x08, 0x3c,
-      0x03, 0x0f, 0x03, 0x3c, 0x07, 0x38, 0x08, 0x2b, 0x05, 0x82, 0xff, 0x11,
-      0x18, 0x08, 0x2f, 0x11, 0x2d, 0x03, 0x20, 0x10, 0x21, 0x0f, 0x80, 0x8c,
-      0x04, 0x82, 0x97, 0x19, 0x0b, 0x15, 0x88, 0x94, 0x05, 0x2f, 0x05, 0x3b,
-      0x07, 0x02, 0x0e, 0x18, 0x09, 0x80, 0xb3, 0x2d, 0x74, 0x0c, 0x80, 0xd6,
-      0x1a, 0x0c, 0x05, 0x80, 0xff, 0x05, 0x80, 0xdf, 0x0c, 0xee, 0x0d, 0x03,
-      0x84, 0x8d, 0x03, 0x37, 0x09, 0x81, 0x5c, 0x14, 0x80, 0xb8, 0x08, 0x80,
-      0xcb, 0x2a, 0x38, 0x03, 0x0a, 0x06, 0x38, 0x08, 0x46, 0x08, 0x0c, 0x06,
-      0x74, 0x0b, 0x1e, 0x03, 0x5a, 0x04, 0x59, 0x09, 0x80, 0x83, 0x18, 0x1c,
-      0x0a, 0x16, 0x09, 0x4c, 0x04, 0x80, 0x8a, 0x06, 0xab, 0xa4, 0x0c, 0x17,
-      0x04, 0x31, 0xa1, 0x04, 0x81, 0xda, 0x26, 0x07, 0x0c, 0x05, 0x05, 0x80,
-      0xa5, 0x11, 0x81, 0x6d, 0x10, 0x78, 0x28, 0x2a, 0x06, 0x4c, 0x04, 0x80,
-      0x8d, 0x04, 0x80, 0xbe, 0x03, 0x1b, 0x03, 0x0f, 0x0d,
-  };
-  static constexpr unsigned char normal1[] = {
-      0x5e, 0x22, 0x7b, 0x05, 0x03, 0x04, 0x2d, 0x03, 0x66, 0x03, 0x01, 0x2f,
-      0x2e, 0x80, 0x82, 0x1d, 0x03, 0x31, 0x0f, 0x1c, 0x04, 0x24, 0x09, 0x1e,
-      0x05, 0x2b, 0x05, 0x44, 0x04, 0x0e, 0x2a, 0x80, 0xaa, 0x06, 0x24, 0x04,
-      0x24, 0x04, 0x28, 0x08, 0x34, 0x0b, 0x01, 0x80, 0x90, 0x81, 0x37, 0x09,
-      0x16, 0x0a, 0x08, 0x80, 0x98, 0x39, 0x03, 0x63, 0x08, 0x09, 0x30, 0x16,
-      0x05, 0x21, 0x03, 0x1b, 0x05, 0x01, 0x40, 0x38, 0x04, 0x4b, 0x05, 0x2f,
-      0x04, 0x0a, 0x07, 0x09, 0x07, 0x40, 0x20, 0x27, 0x04, 0x0c, 0x09, 0x36,
-      0x03, 0x3a, 0x05, 0x1a, 0x07, 0x04, 0x0c, 0x07, 0x50, 0x49, 0x37, 0x33,
-      0x0d, 0x33, 0x07, 0x2e, 0x08, 0x0a, 0x81, 0x26, 0x52, 0x4e, 0x28, 0x08,
-      0x2a, 0x56, 0x1c, 0x14, 0x17, 0x09, 0x4e, 0x04, 0x1e, 0x0f, 0x43, 0x0e,
-      0x19, 0x07, 0x0a, 0x06, 0x48, 0x08, 0x27, 0x09, 0x75, 0x0b, 0x3f, 0x41,
-      0x2a, 0x06, 0x3b, 0x05, 0x0a, 0x06, 0x51, 0x06, 0x01, 0x05, 0x10, 0x03,
-      0x05, 0x80, 0x8b, 0x62, 0x1e, 0x48, 0x08, 0x0a, 0x80, 0xa6, 0x5e, 0x22,
-      0x45, 0x0b, 0x0a, 0x06, 0x0d, 0x13, 0x39, 0x07, 0x0a, 0x36, 0x2c, 0x04,
-      0x10, 0x80, 0xc0, 0x3c, 0x64, 0x53, 0x0c, 0x48, 0x09, 0x0a, 0x46, 0x45,
-      0x1b, 0x48, 0x08, 0x53, 0x1d, 0x39, 0x81, 0x07, 0x46, 0x0a, 0x1d, 0x03,
-      0x47, 0x49, 0x37, 0x03, 0x0e, 0x08, 0x0a, 0x06, 0x39, 0x07, 0x0a, 0x81,
-      0x36, 0x19, 0x80, 0xb7, 0x01, 0x0f, 0x32, 0x0d, 0x83, 0x9b, 0x66, 0x75,
-      0x0b, 0x80, 0xc4, 0x8a, 0xbc, 0x84, 0x2f, 0x8f, 0xd1, 0x82, 0x47, 0xa1,
-      0xb9, 0x82, 0x39, 0x07, 0x2a, 0x04, 0x02, 0x60, 0x26, 0x0a, 0x46, 0x0a,
-      0x28, 0x05, 0x13, 0x82, 0xb0, 0x5b, 0x65, 0x4b, 0x04, 0x39, 0x07, 0x11,
-      0x40, 0x05, 0x0b, 0x02, 0x0e, 0x97, 0xf8, 0x08, 0x84, 0xd6, 0x2a, 0x09,
-      0xa2, 0xf7, 0x81, 0x1f, 0x31, 0x03, 0x11, 0x04, 0x08, 0x81, 0x8c, 0x89,
-      0x04, 0x6b, 0x05, 0x0d, 0x03, 0x09, 0x07, 0x10, 0x93, 0x60, 0x80, 0xf6,
-      0x0a, 0x73, 0x08, 0x6e, 0x17, 0x46, 0x80, 0x9a, 0x14, 0x0c, 0x57, 0x09,
-      0x19, 0x80, 0x87, 0x81, 0x47, 0x03, 0x85, 0x42, 0x0f, 0x15, 0x85, 0x50,
-      0x2b, 0x80, 0xd5, 0x2d, 0x03, 0x1a, 0x04, 0x02, 0x81, 0x70, 0x3a, 0x05,
-      0x01, 0x85, 0x00, 0x80, 0xd7, 0x29, 0x4c, 0x04, 0x0a, 0x04, 0x02, 0x83,
-      0x11, 0x44, 0x4c, 0x3d, 0x80, 0xc2, 0x3c, 0x06, 0x01, 0x04, 0x55, 0x05,
-      0x1b, 0x34, 0x02, 0x81, 0x0e, 0x2c, 0x04, 0x64, 0x0c, 0x56, 0x0a, 0x80,
-      0xae, 0x38, 0x1d, 0x0d, 0x2c, 0x04, 0x09, 0x07, 0x02, 0x0e, 0x06, 0x80,
-      0x9a, 0x83, 0xd8, 0x08, 0x0d, 0x03, 0x0d, 0x03, 0x74, 0x0c, 0x59, 0x07,
-      0x0c, 0x14, 0x0c, 0x04, 0x38, 0x08, 0x0a, 0x06, 0x28, 0x08, 0x22, 0x4e,
-      0x81, 0x54, 0x0c, 0x15, 0x03, 0x03, 0x05, 0x07, 0x09, 0x19, 0x07, 0x07,
-      0x09, 0x03, 0x0d, 0x07, 0x29, 0x80, 0xcb, 0x25, 0x0a, 0x84, 0x06,
-  };
-  auto lower = static_cast<uint16_t>(cp);
-  if (cp < 0x10000) {
-    return is_printable(lower, singletons0,
-                        sizeof(singletons0) / sizeof(*singletons0),
-                        singletons0_lower, normal0, sizeof(normal0));
-  }
-  if (cp < 0x20000) {
-    return is_printable(lower, singletons1,
-                        sizeof(singletons1) / sizeof(*singletons1),
-                        singletons1_lower, normal1, sizeof(normal1));
-  }
-  if (0x2a6de <= cp && cp < 0x2a700) return false;
-  if (0x2b735 <= cp && cp < 0x2b740) return false;
-  if (0x2b81e <= cp && cp < 0x2b820) return false;
-  if (0x2cea2 <= cp && cp < 0x2ceb0) return false;
-  if (0x2ebe1 <= cp && cp < 0x2f800) return false;
-  if (0x2fa1e <= cp && cp < 0x30000) return false;
-  if (0x3134b <= cp && cp < 0xe0100) return false;
-  if (0xe01f0 <= cp && cp < 0x110000) return false;
-  return cp < 0x110000;
-}
-
-}  // namespace detail
-
-FMT_END_NAMESPACE
-
-#endif  // FMT_FORMAT_INL_H_
diff --git a/3party/fmt/include/fmt/format.h b/3party/fmt/include/fmt/format.h
deleted file mode 100644
index 7637c8a..0000000
--- a/3party/fmt/include/fmt/format.h
+++ /dev/null
@@ -1,4535 +0,0 @@
-/*
-  Formatting library for C++
-
-  Copyright (c) 2012 - present, Victor Zverovich
-
-  Permission is hereby granted, free of charge, to any person obtaining
-  a copy of this software and associated documentation files (the
-  "Software"), to deal in the Software without restriction, including
-  without limitation the rights to use, copy, modify, merge, publish,
-  distribute, sublicense, and/or sell copies of the Software, and to
-  permit persons to whom the Software is furnished to do so, subject to
-  the following conditions:
-
-  The above copyright notice and this permission notice shall be
-  included in all copies or substantial portions of the Software.
-
-  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
-  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
-  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
-  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
-  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
-
-  --- Optional exception to the license ---
-
-  As an exception, if, as a result of your compiling your source code, portions
-  of this Software are embedded into a machine-executable object form of such
-  source code, you may redistribute such embedded portions in such object form
-  without including the above copyright and permission notices.
- */
-
-#ifndef FMT_FORMAT_H_
-#define FMT_FORMAT_H_
-
-#include <cmath>             // std::signbit
-#include <cstdint>           // uint32_t
-#include <cstring>           // std::memcpy
-#include <initializer_list>  // std::initializer_list
-#include <limits>            // std::numeric_limits
-#include <memory>            // std::uninitialized_copy
-#include <stdexcept>         // std::runtime_error
-#include <system_error>      // std::system_error
-
-#ifdef __cpp_lib_bit_cast
-#  include <bit>  // std::bit_cast
-#endif
-
-#include "core.h"
-
-#if defined __cpp_inline_variables && __cpp_inline_variables >= 201606L
-#  define FMT_INLINE_VARIABLE inline
-#else
-#  define FMT_INLINE_VARIABLE
-#endif
-
-#if FMT_HAS_CPP17_ATTRIBUTE(fallthrough)
-#  define FMT_FALLTHROUGH [[fallthrough]]
-#elif defined(__clang__)
-#  define FMT_FALLTHROUGH [[clang::fallthrough]]
-#elif FMT_GCC_VERSION >= 700 && \
-    (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= 520)
-#  define FMT_FALLTHROUGH [[gnu::fallthrough]]
-#else
-#  define FMT_FALLTHROUGH
-#endif
-
-#ifndef FMT_DEPRECATED
-#  if FMT_HAS_CPP14_ATTRIBUTE(deprecated) || FMT_MSC_VERSION >= 1900
-#    define FMT_DEPRECATED [[deprecated]]
-#  else
-#    if (defined(__GNUC__) && !defined(__LCC__)) || defined(__clang__)
-#      define FMT_DEPRECATED __attribute__((deprecated))
-#    elif FMT_MSC_VERSION
-#      define FMT_DEPRECATED __declspec(deprecated)
-#    else
-#      define FMT_DEPRECATED /* deprecated */
-#    endif
-#  endif
-#endif
-
-#ifndef FMT_NO_UNIQUE_ADDRESS
-#  if FMT_CPLUSPLUS >= 202002L
-#    if FMT_HAS_CPP_ATTRIBUTE(no_unique_address)
-#      define FMT_NO_UNIQUE_ADDRESS [[no_unique_address]]
-// VS2019 v16.10 and later except clang-cl (https://reviews.llvm.org/D110485)
-#    elif (FMT_MSC_VERSION >= 1929) && !FMT_CLANG_VERSION
-#      define FMT_NO_UNIQUE_ADDRESS [[msvc::no_unique_address]]
-#    endif
-#  endif
-#endif
-#ifndef FMT_NO_UNIQUE_ADDRESS
-#  define FMT_NO_UNIQUE_ADDRESS
-#endif
-
-// Visibility when compiled as a shared library/object.
-#if defined(FMT_LIB_EXPORT) || defined(FMT_SHARED)
-#  define FMT_SO_VISIBILITY(value) FMT_VISIBILITY(value)
-#else
-#  define FMT_SO_VISIBILITY(value)
-#endif
-
-#ifdef __has_builtin
-#  define FMT_HAS_BUILTIN(x) __has_builtin(x)
-#else
-#  define FMT_HAS_BUILTIN(x) 0
-#endif
-
-#if FMT_GCC_VERSION || FMT_CLANG_VERSION
-#  define FMT_NOINLINE __attribute__((noinline))
-#else
-#  define FMT_NOINLINE
-#endif
-
-#ifndef FMT_THROW
-#  if FMT_EXCEPTIONS
-#    if FMT_MSC_VERSION || defined(__NVCC__)
-FMT_BEGIN_NAMESPACE
-namespace detail {
-template <typename Exception> inline void do_throw(const Exception& x) {
-  // Silence unreachable code warnings in MSVC and NVCC because these
-  // are nearly impossible to fix in a generic code.
-  volatile bool b = true;
-  if (b) throw x;
-}
-}  // namespace detail
-FMT_END_NAMESPACE
-#      define FMT_THROW(x) detail::do_throw(x)
-#    else
-#      define FMT_THROW(x) throw x
-#    endif
-#  else
-#    define FMT_THROW(x) \
-      ::fmt::detail::assert_fail(__FILE__, __LINE__, (x).what())
-#  endif
-#endif
-
-#if FMT_EXCEPTIONS
-#  define FMT_TRY try
-#  define FMT_CATCH(x) catch (x)
-#else
-#  define FMT_TRY if (true)
-#  define FMT_CATCH(x) if (false)
-#endif
-
-#ifndef FMT_MAYBE_UNUSED
-#  if FMT_HAS_CPP17_ATTRIBUTE(maybe_unused)
-#    define FMT_MAYBE_UNUSED [[maybe_unused]]
-#  else
-#    define FMT_MAYBE_UNUSED
-#  endif
-#endif
-
-#ifndef FMT_USE_USER_DEFINED_LITERALS
-// EDG based compilers (Intel, NVIDIA, Elbrus, etc), GCC and MSVC support UDLs.
-//
-// GCC before 4.9 requires a space in `operator"" _a` which is invalid in later
-// compiler versions.
-#  if (FMT_HAS_FEATURE(cxx_user_literals) || FMT_GCC_VERSION >= 409 || \
-       FMT_MSC_VERSION >= 1900) &&                                     \
-      (!defined(__EDG_VERSION__) || __EDG_VERSION__ >= /* UDL feature */ 480)
-#    define FMT_USE_USER_DEFINED_LITERALS 1
-#  else
-#    define FMT_USE_USER_DEFINED_LITERALS 0
-#  endif
-#endif
-
-// Defining FMT_REDUCE_INT_INSTANTIATIONS to 1, will reduce the number of
-// integer formatter template instantiations to just one by only using the
-// largest integer type. This results in a reduction in binary size but will
-// cause a decrease in integer formatting performance.
-#if !defined(FMT_REDUCE_INT_INSTANTIATIONS)
-#  define FMT_REDUCE_INT_INSTANTIATIONS 0
-#endif
-
-// __builtin_clz is broken in clang with Microsoft CodeGen:
-// https://github.com/fmtlib/fmt/issues/519.
-#if !FMT_MSC_VERSION
-#  if FMT_HAS_BUILTIN(__builtin_clz) || FMT_GCC_VERSION || FMT_ICC_VERSION
-#    define FMT_BUILTIN_CLZ(n) __builtin_clz(n)
-#  endif
-#  if FMT_HAS_BUILTIN(__builtin_clzll) || FMT_GCC_VERSION || FMT_ICC_VERSION
-#    define FMT_BUILTIN_CLZLL(n) __builtin_clzll(n)
-#  endif
-#endif
-
-// __builtin_ctz is broken in Intel Compiler Classic on Windows:
-// https://github.com/fmtlib/fmt/issues/2510.
-#ifndef __ICL
-#  if FMT_HAS_BUILTIN(__builtin_ctz) || FMT_GCC_VERSION || FMT_ICC_VERSION || \
-      defined(__NVCOMPILER)
-#    define FMT_BUILTIN_CTZ(n) __builtin_ctz(n)
-#  endif
-#  if FMT_HAS_BUILTIN(__builtin_ctzll) || FMT_GCC_VERSION || \
-      FMT_ICC_VERSION || defined(__NVCOMPILER)
-#    define FMT_BUILTIN_CTZLL(n) __builtin_ctzll(n)
-#  endif
-#endif
-
-#if FMT_MSC_VERSION
-#  include <intrin.h>  // _BitScanReverse[64], _BitScanForward[64], _umul128
-#endif
-
-// Some compilers masquerade as both MSVC and GCC-likes or otherwise support
-// __builtin_clz and __builtin_clzll, so only define FMT_BUILTIN_CLZ using the
-// MSVC intrinsics if the clz and clzll builtins are not available.
-#if FMT_MSC_VERSION && !defined(FMT_BUILTIN_CLZLL) && \
-    !defined(FMT_BUILTIN_CTZLL)
-FMT_BEGIN_NAMESPACE
-namespace detail {
-// Avoid Clang with Microsoft CodeGen's -Wunknown-pragmas warning.
-#  if !defined(__clang__)
-#    pragma intrinsic(_BitScanForward)
-#    pragma intrinsic(_BitScanReverse)
-#    if defined(_WIN64)
-#      pragma intrinsic(_BitScanForward64)
-#      pragma intrinsic(_BitScanReverse64)
-#    endif
-#  endif
-
-inline auto clz(uint32_t x) -> int {
-  unsigned long r = 0;
-  _BitScanReverse(&r, x);
-  FMT_ASSERT(x != 0, "");
-  // Static analysis complains about using uninitialized data
-  // "r", but the only way that can happen is if "x" is 0,
-  // which the callers guarantee to not happen.
-  FMT_MSC_WARNING(suppress : 6102)
-  return 31 ^ static_cast<int>(r);
-}
-#  define FMT_BUILTIN_CLZ(n) detail::clz(n)
-
-inline auto clzll(uint64_t x) -> int {
-  unsigned long r = 0;
-#  ifdef _WIN64
-  _BitScanReverse64(&r, x);
-#  else
-  // Scan the high 32 bits.
-  if (_BitScanReverse(&r, static_cast<uint32_t>(x >> 32)))
-    return 63 ^ static_cast<int>(r + 32);
-  // Scan the low 32 bits.
-  _BitScanReverse(&r, static_cast<uint32_t>(x));
-#  endif
-  FMT_ASSERT(x != 0, "");
-  FMT_MSC_WARNING(suppress : 6102)  // Suppress a bogus static analysis warning.
-  return 63 ^ static_cast<int>(r);
-}
-#  define FMT_BUILTIN_CLZLL(n) detail::clzll(n)
-
-inline auto ctz(uint32_t x) -> int {
-  unsigned long r = 0;
-  _BitScanForward(&r, x);
-  FMT_ASSERT(x != 0, "");
-  FMT_MSC_WARNING(suppress : 6102)  // Suppress a bogus static analysis warning.
-  return static_cast<int>(r);
-}
-#  define FMT_BUILTIN_CTZ(n) detail::ctz(n)
-
-inline auto ctzll(uint64_t x) -> int {
-  unsigned long r = 0;
-  FMT_ASSERT(x != 0, "");
-  FMT_MSC_WARNING(suppress : 6102)  // Suppress a bogus static analysis warning.
-#  ifdef _WIN64
-  _BitScanForward64(&r, x);
-#  else
-  // Scan the low 32 bits.
-  if (_BitScanForward(&r, static_cast<uint32_t>(x))) return static_cast<int>(r);
-  // Scan the high 32 bits.
-  _BitScanForward(&r, static_cast<uint32_t>(x >> 32));
-  r += 32;
-#  endif
-  return static_cast<int>(r);
-}
-#  define FMT_BUILTIN_CTZLL(n) detail::ctzll(n)
-}  // namespace detail
-FMT_END_NAMESPACE
-#endif
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-FMT_CONSTEXPR inline void abort_fuzzing_if(bool condition) {
-  ignore_unused(condition);
-#ifdef FMT_FUZZ
-  if (condition) throw std::runtime_error("fuzzing limit reached");
-#endif
-}
-
-template <typename CharT, CharT... C> struct string_literal {
-  static constexpr CharT value[sizeof...(C)] = {C...};
-  constexpr operator basic_string_view<CharT>() const {
-    return {value, sizeof...(C)};
-  }
-};
-
-#if FMT_CPLUSPLUS < 201703L
-template <typename CharT, CharT... C>
-constexpr CharT string_literal<CharT, C...>::value[sizeof...(C)];
-#endif
-
-// Implementation of std::bit_cast for pre-C++20.
-template <typename To, typename From, FMT_ENABLE_IF(sizeof(To) == sizeof(From))>
-FMT_CONSTEXPR20 auto bit_cast(const From& from) -> To {
-#ifdef __cpp_lib_bit_cast
-  if (is_constant_evaluated()) return std::bit_cast<To>(from);
-#endif
-  auto to = To();
-  // The cast suppresses a bogus -Wclass-memaccess on GCC.
-  std::memcpy(static_cast<void*>(&to), &from, sizeof(to));
-  return to;
-}
-
-inline auto is_big_endian() -> bool {
-#ifdef _WIN32
-  return false;
-#elif defined(__BIG_ENDIAN__)
-  return true;
-#elif defined(__BYTE_ORDER__) && defined(__ORDER_BIG_ENDIAN__)
-  return __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__;
-#else
-  struct bytes {
-    char data[sizeof(int)];
-  };
-  return bit_cast<bytes>(1).data[0] == 0;
-#endif
-}
-
-class uint128_fallback {
- private:
-  uint64_t lo_, hi_;
-
- public:
-  constexpr uint128_fallback(uint64_t hi, uint64_t lo) : lo_(lo), hi_(hi) {}
-  constexpr uint128_fallback(uint64_t value = 0) : lo_(value), hi_(0) {}
-
-  constexpr auto high() const noexcept -> uint64_t { return hi_; }
-  constexpr auto low() const noexcept -> uint64_t { return lo_; }
-
-  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-  constexpr explicit operator T() const {
-    return static_cast<T>(lo_);
-  }
-
-  friend constexpr auto operator==(const uint128_fallback& lhs,
-                                   const uint128_fallback& rhs) -> bool {
-    return lhs.hi_ == rhs.hi_ && lhs.lo_ == rhs.lo_;
-  }
-  friend constexpr auto operator!=(const uint128_fallback& lhs,
-                                   const uint128_fallback& rhs) -> bool {
-    return !(lhs == rhs);
-  }
-  friend constexpr auto operator>(const uint128_fallback& lhs,
-                                  const uint128_fallback& rhs) -> bool {
-    return lhs.hi_ != rhs.hi_ ? lhs.hi_ > rhs.hi_ : lhs.lo_ > rhs.lo_;
-  }
-  friend constexpr auto operator|(const uint128_fallback& lhs,
-                                  const uint128_fallback& rhs)
-      -> uint128_fallback {
-    return {lhs.hi_ | rhs.hi_, lhs.lo_ | rhs.lo_};
-  }
-  friend constexpr auto operator&(const uint128_fallback& lhs,
-                                  const uint128_fallback& rhs)
-      -> uint128_fallback {
-    return {lhs.hi_ & rhs.hi_, lhs.lo_ & rhs.lo_};
-  }
-  friend constexpr auto operator~(const uint128_fallback& n)
-      -> uint128_fallback {
-    return {~n.hi_, ~n.lo_};
-  }
-  friend auto operator+(const uint128_fallback& lhs,
-                        const uint128_fallback& rhs) -> uint128_fallback {
-    auto result = uint128_fallback(lhs);
-    result += rhs;
-    return result;
-  }
-  friend auto operator*(const uint128_fallback& lhs, uint32_t rhs)
-      -> uint128_fallback {
-    FMT_ASSERT(lhs.hi_ == 0, "");
-    uint64_t hi = (lhs.lo_ >> 32) * rhs;
-    uint64_t lo = (lhs.lo_ & ~uint32_t()) * rhs;
-    uint64_t new_lo = (hi << 32) + lo;
-    return {(hi >> 32) + (new_lo < lo ? 1 : 0), new_lo};
-  }
-  friend auto operator-(const uint128_fallback& lhs, uint64_t rhs)
-      -> uint128_fallback {
-    return {lhs.hi_ - (lhs.lo_ < rhs ? 1 : 0), lhs.lo_ - rhs};
-  }
-  FMT_CONSTEXPR auto operator>>(int shift) const -> uint128_fallback {
-    if (shift == 64) return {0, hi_};
-    if (shift > 64) return uint128_fallback(0, hi_) >> (shift - 64);
-    return {hi_ >> shift, (hi_ << (64 - shift)) | (lo_ >> shift)};
-  }
-  FMT_CONSTEXPR auto operator<<(int shift) const -> uint128_fallback {
-    if (shift == 64) return {lo_, 0};
-    if (shift > 64) return uint128_fallback(lo_, 0) << (shift - 64);
-    return {hi_ << shift | (lo_ >> (64 - shift)), (lo_ << shift)};
-  }
-  FMT_CONSTEXPR auto operator>>=(int shift) -> uint128_fallback& {
-    return *this = *this >> shift;
-  }
-  FMT_CONSTEXPR void operator+=(uint128_fallback n) {
-    uint64_t new_lo = lo_ + n.lo_;
-    uint64_t new_hi = hi_ + n.hi_ + (new_lo < lo_ ? 1 : 0);
-    FMT_ASSERT(new_hi >= hi_, "");
-    lo_ = new_lo;
-    hi_ = new_hi;
-  }
-  FMT_CONSTEXPR void operator&=(uint128_fallback n) {
-    lo_ &= n.lo_;
-    hi_ &= n.hi_;
-  }
-
-  FMT_CONSTEXPR20 auto operator+=(uint64_t n) noexcept -> uint128_fallback& {
-    if (is_constant_evaluated()) {
-      lo_ += n;
-      hi_ += (lo_ < n ? 1 : 0);
-      return *this;
-    }
-#if FMT_HAS_BUILTIN(__builtin_addcll) && !defined(__ibmxl__)
-    unsigned long long carry;
-    lo_ = __builtin_addcll(lo_, n, 0, &carry);
-    hi_ += carry;
-#elif FMT_HAS_BUILTIN(__builtin_ia32_addcarryx_u64) && !defined(__ibmxl__)
-    unsigned long long result;
-    auto carry = __builtin_ia32_addcarryx_u64(0, lo_, n, &result);
-    lo_ = result;
-    hi_ += carry;
-#elif defined(_MSC_VER) && defined(_M_X64)
-    auto carry = _addcarry_u64(0, lo_, n, &lo_);
-    _addcarry_u64(carry, hi_, 0, &hi_);
-#else
-    lo_ += n;
-    hi_ += (lo_ < n ? 1 : 0);
-#endif
-    return *this;
-  }
-};
-
-using uint128_t = conditional_t<FMT_USE_INT128, uint128_opt, uint128_fallback>;
-
-#ifdef UINTPTR_MAX
-using uintptr_t = ::uintptr_t;
-#else
-using uintptr_t = uint128_t;
-#endif
-
-// Returns the largest possible value for type T. Same as
-// std::numeric_limits<T>::max() but shorter and not affected by the max macro.
-template <typename T> constexpr auto max_value() -> T {
-  return (std::numeric_limits<T>::max)();
-}
-template <typename T> constexpr auto num_bits() -> int {
-  return std::numeric_limits<T>::digits;
-}
-// std::numeric_limits<T>::digits may return 0 for 128-bit ints.
-template <> constexpr auto num_bits<int128_opt>() -> int { return 128; }
-template <> constexpr auto num_bits<uint128_t>() -> int { return 128; }
-
-// A heterogeneous bit_cast used for converting 96-bit long double to uint128_t
-// and 128-bit pointers to uint128_fallback.
-template <typename To, typename From, FMT_ENABLE_IF(sizeof(To) > sizeof(From))>
-inline auto bit_cast(const From& from) -> To {
-  constexpr auto size = static_cast<int>(sizeof(From) / sizeof(unsigned));
-  struct data_t {
-    unsigned value[static_cast<unsigned>(size)];
-  } data = bit_cast<data_t>(from);
-  auto result = To();
-  if (const_check(is_big_endian())) {
-    for (int i = 0; i < size; ++i)
-      result = (result << num_bits<unsigned>()) | data.value[i];
-  } else {
-    for (int i = size - 1; i >= 0; --i)
-      result = (result << num_bits<unsigned>()) | data.value[i];
-  }
-  return result;
-}
-
-template <typename UInt>
-FMT_CONSTEXPR20 inline auto countl_zero_fallback(UInt n) -> int {
-  int lz = 0;
-  constexpr UInt msb_mask = static_cast<UInt>(1) << (num_bits<UInt>() - 1);
-  for (; (n & msb_mask) == 0; n <<= 1) lz++;
-  return lz;
-}
-
-FMT_CONSTEXPR20 inline auto countl_zero(uint32_t n) -> int {
-#ifdef FMT_BUILTIN_CLZ
-  if (!is_constant_evaluated()) return FMT_BUILTIN_CLZ(n);
-#endif
-  return countl_zero_fallback(n);
-}
-
-FMT_CONSTEXPR20 inline auto countl_zero(uint64_t n) -> int {
-#ifdef FMT_BUILTIN_CLZLL
-  if (!is_constant_evaluated()) return FMT_BUILTIN_CLZLL(n);
-#endif
-  return countl_zero_fallback(n);
-}
-
-FMT_INLINE void assume(bool condition) {
-  (void)condition;
-#if FMT_HAS_BUILTIN(__builtin_assume) && !FMT_ICC_VERSION
-  __builtin_assume(condition);
-#elif FMT_GCC_VERSION
-  if (!condition) __builtin_unreachable();
-#endif
-}
-
-// An approximation of iterator_t for pre-C++20 systems.
-template <typename T>
-using iterator_t = decltype(std::begin(std::declval<T&>()));
-template <typename T> using sentinel_t = decltype(std::end(std::declval<T&>()));
-
-// A workaround for std::string not having mutable data() until C++17.
-template <typename Char>
-inline auto get_data(std::basic_string<Char>& s) -> Char* {
-  return &s[0];
-}
-template <typename Container>
-inline auto get_data(Container& c) -> typename Container::value_type* {
-  return c.data();
-}
-
-// Attempts to reserve space for n extra characters in the output range.
-// Returns a pointer to the reserved range or a reference to it.
-template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
-#if FMT_CLANG_VERSION >= 307 && !FMT_ICC_VERSION
-__attribute__((no_sanitize("undefined")))
-#endif
-inline auto
-reserve(std::back_insert_iterator<Container> it, size_t n) ->
-    typename Container::value_type* {
-  Container& c = get_container(it);
-  size_t size = c.size();
-  c.resize(size + n);
-  return get_data(c) + size;
-}
-
-template <typename T>
-inline auto reserve(buffer_appender<T> it, size_t n) -> buffer_appender<T> {
-  buffer<T>& buf = get_container(it);
-  buf.try_reserve(buf.size() + n);
-  return it;
-}
-
-template <typename Iterator>
-constexpr auto reserve(Iterator& it, size_t) -> Iterator& {
-  return it;
-}
-
-template <typename OutputIt>
-using reserve_iterator =
-    remove_reference_t<decltype(reserve(std::declval<OutputIt&>(), 0))>;
-
-template <typename T, typename OutputIt>
-constexpr auto to_pointer(OutputIt, size_t) -> T* {
-  return nullptr;
-}
-template <typename T> auto to_pointer(buffer_appender<T> it, size_t n) -> T* {
-  buffer<T>& buf = get_container(it);
-  auto size = buf.size();
-  if (buf.capacity() < size + n) return nullptr;
-  buf.try_resize(size + n);
-  return buf.data() + size;
-}
-
-template <typename Container, FMT_ENABLE_IF(is_contiguous<Container>::value)>
-inline auto base_iterator(std::back_insert_iterator<Container> it,
-                          typename Container::value_type*)
-    -> std::back_insert_iterator<Container> {
-  return it;
-}
-
-template <typename Iterator>
-constexpr auto base_iterator(Iterator, Iterator it) -> Iterator {
-  return it;
-}
-
-// <algorithm> is spectacularly slow to compile in C++20 so use a simple fill_n
-// instead (#1998).
-template <typename OutputIt, typename Size, typename T>
-FMT_CONSTEXPR auto fill_n(OutputIt out, Size count, const T& value)
-    -> OutputIt {
-  for (Size i = 0; i < count; ++i) *out++ = value;
-  return out;
-}
-template <typename T, typename Size>
-FMT_CONSTEXPR20 auto fill_n(T* out, Size count, char value) -> T* {
-  if (is_constant_evaluated()) {
-    return fill_n<T*, Size, T>(out, count, value);
-  }
-  std::memset(out, value, to_unsigned(count));
-  return out + count;
-}
-
-#ifdef __cpp_char8_t
-using char8_type = char8_t;
-#else
-enum char8_type : unsigned char {};
-#endif
-
-template <typename OutChar, typename InputIt, typename OutputIt>
-FMT_CONSTEXPR FMT_NOINLINE auto copy_str_noinline(InputIt begin, InputIt end,
-                                                  OutputIt out) -> OutputIt {
-  return copy_str<OutChar>(begin, end, out);
-}
-
-// A public domain branchless UTF-8 decoder by Christopher Wellons:
-// https://github.com/skeeto/branchless-utf8
-/* Decode the next character, c, from s, reporting errors in e.
- *
- * Since this is a branchless decoder, four bytes will be read from the
- * buffer regardless of the actual length of the next character. This
- * means the buffer _must_ have at least three bytes of zero padding
- * following the end of the data stream.
- *
- * Errors are reported in e, which will be non-zero if the parsed
- * character was somehow invalid: invalid byte sequence, non-canonical
- * encoding, or a surrogate half.
- *
- * The function returns a pointer to the next character. When an error
- * occurs, this pointer will be a guess that depends on the particular
- * error, but it will always advance at least one byte.
- */
-FMT_CONSTEXPR inline auto utf8_decode(const char* s, uint32_t* c, int* e)
-    -> const char* {
-  constexpr const int masks[] = {0x00, 0x7f, 0x1f, 0x0f, 0x07};
-  constexpr const uint32_t mins[] = {4194304, 0, 128, 2048, 65536};
-  constexpr const int shiftc[] = {0, 18, 12, 6, 0};
-  constexpr const int shifte[] = {0, 6, 4, 2, 0};
-
-  int len = "\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\1\0\0\0\0\0\0\0\0\2\2\2\2\3\3\4"
-      [static_cast<unsigned char>(*s) >> 3];
-  // Compute the pointer to the next character early so that the next
-  // iteration can start working on the next character. Neither Clang
-  // nor GCC figure out this reordering on their own.
-  const char* next = s + len + !len;
-
-  using uchar = unsigned char;
-
-  // Assume a four-byte character and load four bytes. Unused bits are
-  // shifted out.
-  *c = uint32_t(uchar(s[0]) & masks[len]) << 18;
-  *c |= uint32_t(uchar(s[1]) & 0x3f) << 12;
-  *c |= uint32_t(uchar(s[2]) & 0x3f) << 6;
-  *c |= uint32_t(uchar(s[3]) & 0x3f) << 0;
-  *c >>= shiftc[len];
-
-  // Accumulate the various error conditions.
-  *e = (*c < mins[len]) << 6;       // non-canonical encoding
-  *e |= ((*c >> 11) == 0x1b) << 7;  // surrogate half?
-  *e |= (*c > 0x10FFFF) << 8;       // out of range?
-  *e |= (uchar(s[1]) & 0xc0) >> 2;
-  *e |= (uchar(s[2]) & 0xc0) >> 4;
-  *e |= uchar(s[3]) >> 6;
-  *e ^= 0x2a;  // top two bits of each tail byte correct?
-  *e >>= shifte[len];
-
-  return next;
-}
-
-constexpr FMT_INLINE_VARIABLE uint32_t invalid_code_point = ~uint32_t();
-
-// Invokes f(cp, sv) for every code point cp in s with sv being the string view
-// corresponding to the code point. cp is invalid_code_point on error.
-template <typename F>
-FMT_CONSTEXPR void for_each_codepoint(string_view s, F f) {
-  auto decode = [f](const char* buf_ptr, const char* ptr) {
-    auto cp = uint32_t();
-    auto error = 0;
-    auto end = utf8_decode(buf_ptr, &cp, &error);
-    bool result = f(error ? invalid_code_point : cp,
-                    string_view(ptr, error ? 1 : to_unsigned(end - buf_ptr)));
-    return result ? (error ? buf_ptr + 1 : end) : nullptr;
-  };
-  auto p = s.data();
-  const size_t block_size = 4;  // utf8_decode always reads blocks of 4 chars.
-  if (s.size() >= block_size) {
-    for (auto end = p + s.size() - block_size + 1; p < end;) {
-      p = decode(p, p);
-      if (!p) return;
-    }
-  }
-  if (auto num_chars_left = s.data() + s.size() - p) {
-    char buf[2 * block_size - 1] = {};
-    copy_str<char>(p, p + num_chars_left, buf);
-    const char* buf_ptr = buf;
-    do {
-      auto end = decode(buf_ptr, p);
-      if (!end) return;
-      p += end - buf_ptr;
-      buf_ptr = end;
-    } while (buf_ptr - buf < num_chars_left);
-  }
-}
-
-template <typename Char>
-inline auto compute_width(basic_string_view<Char> s) -> size_t {
-  return s.size();
-}
-
-// Computes approximate display width of a UTF-8 string.
-FMT_CONSTEXPR inline auto compute_width(string_view s) -> size_t {
-  size_t num_code_points = 0;
-  // It is not a lambda for compatibility with C++14.
-  struct count_code_points {
-    size_t* count;
-    FMT_CONSTEXPR auto operator()(uint32_t cp, string_view) const -> bool {
-      *count += detail::to_unsigned(
-          1 +
-          (cp >= 0x1100 &&
-           (cp <= 0x115f ||  // Hangul Jamo init. consonants
-            cp == 0x2329 ||  // LEFT-POINTING ANGLE BRACKET
-            cp == 0x232a ||  // RIGHT-POINTING ANGLE BRACKET
-            // CJK ... Yi except IDEOGRAPHIC HALF FILL SPACE:
-            (cp >= 0x2e80 && cp <= 0xa4cf && cp != 0x303f) ||
-            (cp >= 0xac00 && cp <= 0xd7a3) ||    // Hangul Syllables
-            (cp >= 0xf900 && cp <= 0xfaff) ||    // CJK Compatibility Ideographs
-            (cp >= 0xfe10 && cp <= 0xfe19) ||    // Vertical Forms
-            (cp >= 0xfe30 && cp <= 0xfe6f) ||    // CJK Compatibility Forms
-            (cp >= 0xff00 && cp <= 0xff60) ||    // Fullwidth Forms
-            (cp >= 0xffe0 && cp <= 0xffe6) ||    // Fullwidth Forms
-            (cp >= 0x20000 && cp <= 0x2fffd) ||  // CJK
-            (cp >= 0x30000 && cp <= 0x3fffd) ||
-            // Miscellaneous Symbols and Pictographs + Emoticons:
-            (cp >= 0x1f300 && cp <= 0x1f64f) ||
-            // Supplemental Symbols and Pictographs:
-            (cp >= 0x1f900 && cp <= 0x1f9ff))));
-      return true;
-    }
-  };
-  // We could avoid branches by using utf8_decode directly.
-  for_each_codepoint(s, count_code_points{&num_code_points});
-  return num_code_points;
-}
-
-inline auto compute_width(basic_string_view<char8_type> s) -> size_t {
-  return compute_width(
-      string_view(reinterpret_cast<const char*>(s.data()), s.size()));
-}
-
-template <typename Char>
-inline auto code_point_index(basic_string_view<Char> s, size_t n) -> size_t {
-  size_t size = s.size();
-  return n < size ? n : size;
-}
-
-// Calculates the index of the nth code point in a UTF-8 string.
-inline auto code_point_index(string_view s, size_t n) -> size_t {
-  size_t result = s.size();
-  const char* begin = s.begin();
-  for_each_codepoint(s, [begin, &n, &result](uint32_t, string_view sv) {
-    if (n != 0) {
-      --n;
-      return true;
-    }
-    result = to_unsigned(sv.begin() - begin);
-    return false;
-  });
-  return result;
-}
-
-inline auto code_point_index(basic_string_view<char8_type> s, size_t n)
-    -> size_t {
-  return code_point_index(
-      string_view(reinterpret_cast<const char*>(s.data()), s.size()), n);
-}
-
-template <typename T> struct is_integral : std::is_integral<T> {};
-template <> struct is_integral<int128_opt> : std::true_type {};
-template <> struct is_integral<uint128_t> : std::true_type {};
-
-template <typename T>
-using is_signed =
-    std::integral_constant<bool, std::numeric_limits<T>::is_signed ||
-                                     std::is_same<T, int128_opt>::value>;
-
-template <typename T>
-using is_integer =
-    bool_constant<is_integral<T>::value && !std::is_same<T, bool>::value &&
-                  !std::is_same<T, char>::value &&
-                  !std::is_same<T, wchar_t>::value>;
-
-#ifndef FMT_USE_FLOAT
-#  define FMT_USE_FLOAT 1
-#endif
-#ifndef FMT_USE_DOUBLE
-#  define FMT_USE_DOUBLE 1
-#endif
-#ifndef FMT_USE_LONG_DOUBLE
-#  define FMT_USE_LONG_DOUBLE 1
-#endif
-
-#ifndef FMT_USE_FLOAT128
-#  ifdef __clang__
-// Clang emulates GCC, so it has to appear early.
-#    if FMT_HAS_INCLUDE(<quadmath.h>)
-#      define FMT_USE_FLOAT128 1
-#    endif
-#  elif defined(__GNUC__)
-// GNU C++:
-#    if defined(_GLIBCXX_USE_FLOAT128) && !defined(__STRICT_ANSI__)
-#      define FMT_USE_FLOAT128 1
-#    endif
-#  endif
-#  ifndef FMT_USE_FLOAT128
-#    define FMT_USE_FLOAT128 0
-#  endif
-#endif
-
-#if FMT_USE_FLOAT128
-using float128 = __float128;
-#else
-using float128 = void;
-#endif
-template <typename T> using is_float128 = std::is_same<T, float128>;
-
-template <typename T>
-using is_floating_point =
-    bool_constant<std::is_floating_point<T>::value || is_float128<T>::value>;
-
-template <typename T, bool = std::is_floating_point<T>::value>
-struct is_fast_float : bool_constant<std::numeric_limits<T>::is_iec559 &&
-                                     sizeof(T) <= sizeof(double)> {};
-template <typename T> struct is_fast_float<T, false> : std::false_type {};
-
-template <typename T>
-using is_double_double = bool_constant<std::numeric_limits<T>::digits == 106>;
-
-#ifndef FMT_USE_FULL_CACHE_DRAGONBOX
-#  define FMT_USE_FULL_CACHE_DRAGONBOX 0
-#endif
-
-template <typename T>
-template <typename U>
-void buffer<T>::append(const U* begin, const U* end) {
-  while (begin != end) {
-    auto count = to_unsigned(end - begin);
-    try_reserve(size_ + count);
-    auto free_cap = capacity_ - size_;
-    if (free_cap < count) count = free_cap;
-    std::uninitialized_copy_n(begin, count, ptr_ + size_);
-    size_ += count;
-    begin += count;
-  }
-}
-
-template <typename T, typename Enable = void>
-struct is_locale : std::false_type {};
-template <typename T>
-struct is_locale<T, void_t<decltype(T::classic())>> : std::true_type {};
-}  // namespace detail
-
-FMT_BEGIN_EXPORT
-
-// The number of characters to store in the basic_memory_buffer object itself
-// to avoid dynamic memory allocation.
-enum { inline_buffer_size = 500 };
-
-/**
-  \rst
-  A dynamically growing memory buffer for trivially copyable/constructible types
-  with the first ``SIZE`` elements stored in the object itself.
-
-  You can use the ``memory_buffer`` type alias for ``char`` instead.
-
-  **Example**::
-
-     auto out = fmt::memory_buffer();
-     fmt::format_to(std::back_inserter(out), "The answer is {}.", 42);
-
-  This will append the following output to the ``out`` object:
-
-  .. code-block:: none
-
-     The answer is 42.
-
-  The output can be converted to an ``std::string`` with ``to_string(out)``.
-  \endrst
- */
-template <typename T, size_t SIZE = inline_buffer_size,
-          typename Allocator = std::allocator<T>>
-class basic_memory_buffer final : public detail::buffer<T> {
- private:
-  T store_[SIZE];
-
-  // Don't inherit from Allocator to avoid generating type_info for it.
-  FMT_NO_UNIQUE_ADDRESS Allocator alloc_;
-
-  // Deallocate memory allocated by the buffer.
-  FMT_CONSTEXPR20 void deallocate() {
-    T* data = this->data();
-    if (data != store_) alloc_.deallocate(data, this->capacity());
-  }
-
- protected:
-  FMT_CONSTEXPR20 void grow(size_t size) override {
-    detail::abort_fuzzing_if(size > 5000);
-    const size_t max_size = std::allocator_traits<Allocator>::max_size(alloc_);
-    size_t old_capacity = this->capacity();
-    size_t new_capacity = old_capacity + old_capacity / 2;
-    if (size > new_capacity)
-      new_capacity = size;
-    else if (new_capacity > max_size)
-      new_capacity = size > max_size ? size : max_size;
-    T* old_data = this->data();
-    T* new_data =
-        std::allocator_traits<Allocator>::allocate(alloc_, new_capacity);
-    // Suppress a bogus -Wstringop-overflow in gcc 13.1 (#3481).
-    detail::assume(this->size() <= new_capacity);
-    // The following code doesn't throw, so the raw pointer above doesn't leak.
-    std::uninitialized_copy_n(old_data, this->size(), new_data);
-    this->set(new_data, new_capacity);
-    // deallocate must not throw according to the standard, but even if it does,
-    // the buffer already uses the new storage and will deallocate it in
-    // destructor.
-    if (old_data != store_) alloc_.deallocate(old_data, old_capacity);
-  }
-
- public:
-  using value_type = T;
-  using const_reference = const T&;
-
-  FMT_CONSTEXPR20 explicit basic_memory_buffer(
-      const Allocator& alloc = Allocator())
-      : alloc_(alloc) {
-    this->set(store_, SIZE);
-    if (detail::is_constant_evaluated()) detail::fill_n(store_, SIZE, T());
-  }
-  FMT_CONSTEXPR20 ~basic_memory_buffer() { deallocate(); }
-
- private:
-  // Move data from other to this buffer.
-  FMT_CONSTEXPR20 void move(basic_memory_buffer& other) {
-    alloc_ = std::move(other.alloc_);
-    T* data = other.data();
-    size_t size = other.size(), capacity = other.capacity();
-    if (data == other.store_) {
-      this->set(store_, capacity);
-      detail::copy_str<T>(other.store_, other.store_ + size, store_);
-    } else {
-      this->set(data, capacity);
-      // Set pointer to the inline array so that delete is not called
-      // when deallocating.
-      other.set(other.store_, 0);
-      other.clear();
-    }
-    this->resize(size);
-  }
-
- public:
-  /**
-    \rst
-    Constructs a :class:`fmt::basic_memory_buffer` object moving the content
-    of the other object to it.
-    \endrst
-   */
-  FMT_CONSTEXPR20 basic_memory_buffer(basic_memory_buffer&& other) noexcept {
-    move(other);
-  }
-
-  /**
-    \rst
-    Moves the content of the other ``basic_memory_buffer`` object to this one.
-    \endrst
-   */
-  auto operator=(basic_memory_buffer&& other) noexcept -> basic_memory_buffer& {
-    FMT_ASSERT(this != &other, "");
-    deallocate();
-    move(other);
-    return *this;
-  }
-
-  // Returns a copy of the allocator associated with this buffer.
-  auto get_allocator() const -> Allocator { return alloc_; }
-
-  /**
-    Resizes the buffer to contain *count* elements. If T is a POD type new
-    elements may not be initialized.
-   */
-  FMT_CONSTEXPR20 void resize(size_t count) { this->try_resize(count); }
-
-  /** Increases the buffer capacity to *new_capacity*. */
-  void reserve(size_t new_capacity) { this->try_reserve(new_capacity); }
-
-  using detail::buffer<T>::append;
-  template <typename ContiguousRange>
-  void append(const ContiguousRange& range) {
-    append(range.data(), range.data() + range.size());
-  }
-};
-
-using memory_buffer = basic_memory_buffer<char>;
-
-template <typename T, size_t SIZE, typename Allocator>
-struct is_contiguous<basic_memory_buffer<T, SIZE, Allocator>> : std::true_type {
-};
-
-FMT_END_EXPORT
-namespace detail {
-FMT_API auto write_console(int fd, string_view text) -> bool;
-FMT_API auto write_console(std::FILE* f, string_view text) -> bool;
-FMT_API void print(std::FILE*, string_view);
-}  // namespace detail
-
-FMT_BEGIN_EXPORT
-
-// Suppress a misleading warning in older versions of clang.
-#if FMT_CLANG_VERSION
-#  pragma clang diagnostic ignored "-Wweak-vtables"
-#endif
-
-/** An error reported from a formatting function. */
-class FMT_SO_VISIBILITY("default") format_error : public std::runtime_error {
- public:
-  using std::runtime_error::runtime_error;
-};
-
-namespace detail_exported {
-#if FMT_USE_NONTYPE_TEMPLATE_ARGS
-template <typename Char, size_t N> struct fixed_string {
-  constexpr fixed_string(const Char (&str)[N]) {
-    detail::copy_str<Char, const Char*, Char*>(static_cast<const Char*>(str),
-                                               str + N, data);
-  }
-  Char data[N] = {};
-};
-#endif
-
-// Converts a compile-time string to basic_string_view.
-template <typename Char, size_t N>
-constexpr auto compile_string_to_view(const Char (&s)[N])
-    -> basic_string_view<Char> {
-  // Remove trailing NUL character if needed. Won't be present if this is used
-  // with a raw character array (i.e. not defined as a string).
-  return {s, N - (std::char_traits<Char>::to_int_type(s[N - 1]) == 0 ? 1 : 0)};
-}
-template <typename Char>
-constexpr auto compile_string_to_view(detail::std_string_view<Char> s)
-    -> basic_string_view<Char> {
-  return {s.data(), s.size()};
-}
-}  // namespace detail_exported
-
-class loc_value {
- private:
-  basic_format_arg<format_context> value_;
-
- public:
-  template <typename T, FMT_ENABLE_IF(!detail::is_float128<T>::value)>
-  loc_value(T value) : value_(detail::make_arg<format_context>(value)) {}
-
-  template <typename T, FMT_ENABLE_IF(detail::is_float128<T>::value)>
-  loc_value(T) {}
-
-  template <typename Visitor> auto visit(Visitor&& vis) -> decltype(vis(0)) {
-    return visit_format_arg(vis, value_);
-  }
-};
-
-// A locale facet that formats values in UTF-8.
-// It is parameterized on the locale to avoid the heavy <locale> include.
-template <typename Locale> class format_facet : public Locale::facet {
- private:
-  std::string separator_;
-  std::string grouping_;
-  std::string decimal_point_;
-
- protected:
-  virtual auto do_put(appender out, loc_value val,
-                      const format_specs<>& specs) const -> bool;
-
- public:
-  static FMT_API typename Locale::id id;
-
-  explicit format_facet(Locale& loc);
-  explicit format_facet(string_view sep = "",
-                        std::initializer_list<unsigned char> g = {3},
-                        std::string decimal_point = ".")
-      : separator_(sep.data(), sep.size()),
-        grouping_(g.begin(), g.end()),
-        decimal_point_(decimal_point) {}
-
-  auto put(appender out, loc_value val, const format_specs<>& specs) const
-      -> bool {
-    return do_put(out, val, specs);
-  }
-};
-
-namespace detail {
-
-// Returns true if value is negative, false otherwise.
-// Same as `value < 0` but doesn't produce warnings if T is an unsigned type.
-template <typename T, FMT_ENABLE_IF(is_signed<T>::value)>
-constexpr auto is_negative(T value) -> bool {
-  return value < 0;
-}
-template <typename T, FMT_ENABLE_IF(!is_signed<T>::value)>
-constexpr auto is_negative(T) -> bool {
-  return false;
-}
-
-template <typename T>
-FMT_CONSTEXPR auto is_supported_floating_point(T) -> bool {
-  if (std::is_same<T, float>()) return FMT_USE_FLOAT;
-  if (std::is_same<T, double>()) return FMT_USE_DOUBLE;
-  if (std::is_same<T, long double>()) return FMT_USE_LONG_DOUBLE;
-  return true;
-}
-
-// Smallest of uint32_t, uint64_t, uint128_t that is large enough to
-// represent all values of an integral type T.
-template <typename T>
-using uint32_or_64_or_128_t =
-    conditional_t<num_bits<T>() <= 32 && !FMT_REDUCE_INT_INSTANTIATIONS,
-                  uint32_t,
-                  conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>>;
-template <typename T>
-using uint64_or_128_t = conditional_t<num_bits<T>() <= 64, uint64_t, uint128_t>;
-
-#define FMT_POWERS_OF_10(factor)                                  \
-  factor * 10, (factor) * 100, (factor) * 1000, (factor) * 10000, \
-      (factor) * 100000, (factor) * 1000000, (factor) * 10000000, \
-      (factor) * 100000000, (factor) * 1000000000
-
-// Converts value in the range [0, 100) to a string.
-constexpr auto digits2(size_t value) -> const char* {
-  // GCC generates slightly better code when value is pointer-size.
-  return &"0001020304050607080910111213141516171819"
-         "2021222324252627282930313233343536373839"
-         "4041424344454647484950515253545556575859"
-         "6061626364656667686970717273747576777879"
-         "8081828384858687888990919293949596979899"[value * 2];
-}
-
-// Sign is a template parameter to workaround a bug in gcc 4.8.
-template <typename Char, typename Sign> constexpr auto sign(Sign s) -> Char {
-#if !FMT_GCC_VERSION || FMT_GCC_VERSION >= 604
-  static_assert(std::is_same<Sign, sign_t>::value, "");
-#endif
-  return static_cast<Char>("\0-+ "[s]);
-}
-
-template <typename T> FMT_CONSTEXPR auto count_digits_fallback(T n) -> int {
-  int count = 1;
-  for (;;) {
-    // Integer division is slow so do it for a group of four digits instead
-    // of for every digit. The idea comes from the talk by Alexandrescu
-    // "Three Optimization Tips for C++". See speed-test for a comparison.
-    if (n < 10) return count;
-    if (n < 100) return count + 1;
-    if (n < 1000) return count + 2;
-    if (n < 10000) return count + 3;
-    n /= 10000u;
-    count += 4;
-  }
-}
-#if FMT_USE_INT128
-FMT_CONSTEXPR inline auto count_digits(uint128_opt n) -> int {
-  return count_digits_fallback(n);
-}
-#endif
-
-#ifdef FMT_BUILTIN_CLZLL
-// It is a separate function rather than a part of count_digits to workaround
-// the lack of static constexpr in constexpr functions.
-inline auto do_count_digits(uint64_t n) -> int {
-  // This has comparable performance to the version by Kendall Willets
-  // (https://github.com/fmtlib/format-benchmark/blob/master/digits10)
-  // but uses smaller tables.
-  // Maps bsr(n) to ceil(log10(pow(2, bsr(n) + 1) - 1)).
-  static constexpr uint8_t bsr2log10[] = {
-      1,  1,  1,  2,  2,  2,  3,  3,  3,  4,  4,  4,  4,  5,  5,  5,
-      6,  6,  6,  7,  7,  7,  7,  8,  8,  8,  9,  9,  9,  10, 10, 10,
-      10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15,
-      15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20};
-  auto t = bsr2log10[FMT_BUILTIN_CLZLL(n | 1) ^ 63];
-  static constexpr const uint64_t zero_or_powers_of_10[] = {
-      0, 0, FMT_POWERS_OF_10(1U), FMT_POWERS_OF_10(1000000000ULL),
-      10000000000000000000ULL};
-  return t - (n < zero_or_powers_of_10[t]);
-}
-#endif
-
-// Returns the number of decimal digits in n. Leading zeros are not counted
-// except for n == 0 in which case count_digits returns 1.
-FMT_CONSTEXPR20 inline auto count_digits(uint64_t n) -> int {
-#ifdef FMT_BUILTIN_CLZLL
-  if (!is_constant_evaluated()) {
-    return do_count_digits(n);
-  }
-#endif
-  return count_digits_fallback(n);
-}
-
-// Counts the number of digits in n. BITS = log2(radix).
-template <int BITS, typename UInt>
-FMT_CONSTEXPR auto count_digits(UInt n) -> int {
-#ifdef FMT_BUILTIN_CLZ
-  if (!is_constant_evaluated() && num_bits<UInt>() == 32)
-    return (FMT_BUILTIN_CLZ(static_cast<uint32_t>(n) | 1) ^ 31) / BITS + 1;
-#endif
-  // Lambda avoids unreachable code warnings from NVHPC.
-  return [](UInt m) {
-    int num_digits = 0;
-    do {
-      ++num_digits;
-    } while ((m >>= BITS) != 0);
-    return num_digits;
-  }(n);
-}
-
-#ifdef FMT_BUILTIN_CLZ
-// It is a separate function rather than a part of count_digits to workaround
-// the lack of static constexpr in constexpr functions.
-FMT_INLINE auto do_count_digits(uint32_t n) -> int {
-// An optimization by Kendall Willets from https://bit.ly/3uOIQrB.
-// This increments the upper 32 bits (log10(T) - 1) when >= T is added.
-#  define FMT_INC(T) (((sizeof(#T) - 1ull) << 32) - T)
-  static constexpr uint64_t table[] = {
-      FMT_INC(0),          FMT_INC(0),          FMT_INC(0),           // 8
-      FMT_INC(10),         FMT_INC(10),         FMT_INC(10),          // 64
-      FMT_INC(100),        FMT_INC(100),        FMT_INC(100),         // 512
-      FMT_INC(1000),       FMT_INC(1000),       FMT_INC(1000),        // 4096
-      FMT_INC(10000),      FMT_INC(10000),      FMT_INC(10000),       // 32k
-      FMT_INC(100000),     FMT_INC(100000),     FMT_INC(100000),      // 256k
-      FMT_INC(1000000),    FMT_INC(1000000),    FMT_INC(1000000),     // 2048k
-      FMT_INC(10000000),   FMT_INC(10000000),   FMT_INC(10000000),    // 16M
-      FMT_INC(100000000),  FMT_INC(100000000),  FMT_INC(100000000),   // 128M
-      FMT_INC(1000000000), FMT_INC(1000000000), FMT_INC(1000000000),  // 1024M
-      FMT_INC(1000000000), FMT_INC(1000000000)                        // 4B
-  };
-  auto inc = table[FMT_BUILTIN_CLZ(n | 1) ^ 31];
-  return static_cast<int>((n + inc) >> 32);
-}
-#endif
-
-// Optional version of count_digits for better performance on 32-bit platforms.
-FMT_CONSTEXPR20 inline auto count_digits(uint32_t n) -> int {
-#ifdef FMT_BUILTIN_CLZ
-  if (!is_constant_evaluated()) {
-    return do_count_digits(n);
-  }
-#endif
-  return count_digits_fallback(n);
-}
-
-template <typename Int> constexpr auto digits10() noexcept -> int {
-  return std::numeric_limits<Int>::digits10;
-}
-template <> constexpr auto digits10<int128_opt>() noexcept -> int { return 38; }
-template <> constexpr auto digits10<uint128_t>() noexcept -> int { return 38; }
-
-template <typename Char> struct thousands_sep_result {
-  std::string grouping;
-  Char thousands_sep;
-};
-
-template <typename Char>
-FMT_API auto thousands_sep_impl(locale_ref loc) -> thousands_sep_result<Char>;
-template <typename Char>
-inline auto thousands_sep(locale_ref loc) -> thousands_sep_result<Char> {
-  auto result = thousands_sep_impl<char>(loc);
-  return {result.grouping, Char(result.thousands_sep)};
-}
-template <>
-inline auto thousands_sep(locale_ref loc) -> thousands_sep_result<wchar_t> {
-  return thousands_sep_impl<wchar_t>(loc);
-}
-
-template <typename Char>
-FMT_API auto decimal_point_impl(locale_ref loc) -> Char;
-template <typename Char> inline auto decimal_point(locale_ref loc) -> Char {
-  return Char(decimal_point_impl<char>(loc));
-}
-template <> inline auto decimal_point(locale_ref loc) -> wchar_t {
-  return decimal_point_impl<wchar_t>(loc);
-}
-
-// Compares two characters for equality.
-template <typename Char> auto equal2(const Char* lhs, const char* rhs) -> bool {
-  return lhs[0] == Char(rhs[0]) && lhs[1] == Char(rhs[1]);
-}
-inline auto equal2(const char* lhs, const char* rhs) -> bool {
-  return memcmp(lhs, rhs, 2) == 0;
-}
-
-// Copies two characters from src to dst.
-template <typename Char>
-FMT_CONSTEXPR20 FMT_INLINE void copy2(Char* dst, const char* src) {
-  if (!is_constant_evaluated() && sizeof(Char) == sizeof(char)) {
-    memcpy(dst, src, 2);
-    return;
-  }
-  *dst++ = static_cast<Char>(*src++);
-  *dst = static_cast<Char>(*src);
-}
-
-template <typename Iterator> struct format_decimal_result {
-  Iterator begin;
-  Iterator end;
-};
-
-// Formats a decimal unsigned integer value writing into out pointing to a
-// buffer of specified size. The caller must ensure that the buffer is large
-// enough.
-template <typename Char, typename UInt>
-FMT_CONSTEXPR20 auto format_decimal(Char* out, UInt value, int size)
-    -> format_decimal_result<Char*> {
-  FMT_ASSERT(size >= count_digits(value), "invalid digit count");
-  out += size;
-  Char* end = out;
-  while (value >= 100) {
-    // Integer division is slow so do it for a group of two digits instead
-    // of for every digit. The idea comes from the talk by Alexandrescu
-    // "Three Optimization Tips for C++". See speed-test for a comparison.
-    out -= 2;
-    copy2(out, digits2(static_cast<size_t>(value % 100)));
-    value /= 100;
-  }
-  if (value < 10) {
-    *--out = static_cast<Char>('0' + value);
-    return {out, end};
-  }
-  out -= 2;
-  copy2(out, digits2(static_cast<size_t>(value)));
-  return {out, end};
-}
-
-template <typename Char, typename UInt, typename Iterator,
-          FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<Iterator>>::value)>
-FMT_CONSTEXPR inline auto format_decimal(Iterator out, UInt value, int size)
-    -> format_decimal_result<Iterator> {
-  // Buffer is large enough to hold all digits (digits10 + 1).
-  Char buffer[digits10<UInt>() + 1] = {};
-  auto end = format_decimal(buffer, value, size).end;
-  return {out, detail::copy_str_noinline<Char>(buffer, end, out)};
-}
-
-template <unsigned BASE_BITS, typename Char, typename UInt>
-FMT_CONSTEXPR auto format_uint(Char* buffer, UInt value, int num_digits,
-                               bool upper = false) -> Char* {
-  buffer += num_digits;
-  Char* end = buffer;
-  do {
-    const char* digits = upper ? "0123456789ABCDEF" : "0123456789abcdef";
-    unsigned digit = static_cast<unsigned>(value & ((1 << BASE_BITS) - 1));
-    *--buffer = static_cast<Char>(BASE_BITS < 4 ? static_cast<char>('0' + digit)
-                                                : digits[digit]);
-  } while ((value >>= BASE_BITS) != 0);
-  return end;
-}
-
-template <unsigned BASE_BITS, typename Char, typename It, typename UInt>
-FMT_CONSTEXPR inline auto format_uint(It out, UInt value, int num_digits,
-                                      bool upper = false) -> It {
-  if (auto ptr = to_pointer<Char>(out, to_unsigned(num_digits))) {
-    format_uint<BASE_BITS>(ptr, value, num_digits, upper);
-    return out;
-  }
-  // Buffer should be large enough to hold all digits (digits / BASE_BITS + 1).
-  char buffer[num_bits<UInt>() / BASE_BITS + 1] = {};
-  format_uint<BASE_BITS>(buffer, value, num_digits, upper);
-  return detail::copy_str_noinline<Char>(buffer, buffer + num_digits, out);
-}
-
-// A converter from UTF-8 to UTF-16.
-class utf8_to_utf16 {
- private:
-  basic_memory_buffer<wchar_t> buffer_;
-
- public:
-  FMT_API explicit utf8_to_utf16(string_view s);
-  operator basic_string_view<wchar_t>() const { return {&buffer_[0], size()}; }
-  auto size() const -> size_t { return buffer_.size() - 1; }
-  auto c_str() const -> const wchar_t* { return &buffer_[0]; }
-  auto str() const -> std::wstring { return {&buffer_[0], size()}; }
-};
-
-enum class to_utf8_error_policy { abort, replace };
-
-// A converter from UTF-16/UTF-32 (host endian) to UTF-8.
-template <typename WChar, typename Buffer = memory_buffer> class to_utf8 {
- private:
-  Buffer buffer_;
-
- public:
-  to_utf8() {}
-  explicit to_utf8(basic_string_view<WChar> s,
-                   to_utf8_error_policy policy = to_utf8_error_policy::abort) {
-    static_assert(sizeof(WChar) == 2 || sizeof(WChar) == 4,
-                  "Expect utf16 or utf32");
-    if (!convert(s, policy))
-      FMT_THROW(std::runtime_error(sizeof(WChar) == 2 ? "invalid utf16"
-                                                      : "invalid utf32"));
-  }
-  operator string_view() const { return string_view(&buffer_[0], size()); }
-  auto size() const -> size_t { return buffer_.size() - 1; }
-  auto c_str() const -> const char* { return &buffer_[0]; }
-  auto str() const -> std::string { return std::string(&buffer_[0], size()); }
-
-  // Performs conversion returning a bool instead of throwing exception on
-  // conversion error. This method may still throw in case of memory allocation
-  // error.
-  auto convert(basic_string_view<WChar> s,
-               to_utf8_error_policy policy = to_utf8_error_policy::abort)
-      -> bool {
-    if (!convert(buffer_, s, policy)) return false;
-    buffer_.push_back(0);
-    return true;
-  }
-  static auto convert(Buffer& buf, basic_string_view<WChar> s,
-                      to_utf8_error_policy policy = to_utf8_error_policy::abort)
-      -> bool {
-    for (auto p = s.begin(); p != s.end(); ++p) {
-      uint32_t c = static_cast<uint32_t>(*p);
-      if (sizeof(WChar) == 2 && c >= 0xd800 && c <= 0xdfff) {
-        // Handle a surrogate pair.
-        ++p;
-        if (p == s.end() || (c & 0xfc00) != 0xd800 || (*p & 0xfc00) != 0xdc00) {
-          if (policy == to_utf8_error_policy::abort) return false;
-          buf.append(string_view("\xEF\xBF\xBD"));
-          --p;
-        } else {
-          c = (c << 10) + static_cast<uint32_t>(*p) - 0x35fdc00;
-        }
-      } else if (c < 0x80) {
-        buf.push_back(static_cast<char>(c));
-      } else if (c < 0x800) {
-        buf.push_back(static_cast<char>(0xc0 | (c >> 6)));
-        buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
-      } else if ((c >= 0x800 && c <= 0xd7ff) || (c >= 0xe000 && c <= 0xffff)) {
-        buf.push_back(static_cast<char>(0xe0 | (c >> 12)));
-        buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
-        buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
-      } else if (c >= 0x10000 && c <= 0x10ffff) {
-        buf.push_back(static_cast<char>(0xf0 | (c >> 18)));
-        buf.push_back(static_cast<char>(0x80 | ((c & 0x3ffff) >> 12)));
-        buf.push_back(static_cast<char>(0x80 | ((c & 0xfff) >> 6)));
-        buf.push_back(static_cast<char>(0x80 | (c & 0x3f)));
-      } else {
-        return false;
-      }
-    }
-    return true;
-  }
-};
-
-// Computes 128-bit result of multiplication of two 64-bit unsigned integers.
-inline auto umul128(uint64_t x, uint64_t y) noexcept -> uint128_fallback {
-#if FMT_USE_INT128
-  auto p = static_cast<uint128_opt>(x) * static_cast<uint128_opt>(y);
-  return {static_cast<uint64_t>(p >> 64), static_cast<uint64_t>(p)};
-#elif defined(_MSC_VER) && defined(_M_X64)
-  auto hi = uint64_t();
-  auto lo = _umul128(x, y, &hi);
-  return {hi, lo};
-#else
-  const uint64_t mask = static_cast<uint64_t>(max_value<uint32_t>());
-
-  uint64_t a = x >> 32;
-  uint64_t b = x & mask;
-  uint64_t c = y >> 32;
-  uint64_t d = y & mask;
-
-  uint64_t ac = a * c;
-  uint64_t bc = b * c;
-  uint64_t ad = a * d;
-  uint64_t bd = b * d;
-
-  uint64_t intermediate = (bd >> 32) + (ad & mask) + (bc & mask);
-
-  return {ac + (intermediate >> 32) + (ad >> 32) + (bc >> 32),
-          (intermediate << 32) + (bd & mask)};
-#endif
-}
-
-namespace dragonbox {
-// Computes floor(log10(pow(2, e))) for e in [-2620, 2620] using the method from
-// https://fmt.dev/papers/Dragonbox.pdf#page=28, section 6.1.
-inline auto floor_log10_pow2(int e) noexcept -> int {
-  FMT_ASSERT(e <= 2620 && e >= -2620, "too large exponent");
-  static_assert((-1 >> 1) == -1, "right shift is not arithmetic");
-  return (e * 315653) >> 20;
-}
-
-inline auto floor_log2_pow10(int e) noexcept -> int {
-  FMT_ASSERT(e <= 1233 && e >= -1233, "too large exponent");
-  return (e * 1741647) >> 19;
-}
-
-// Computes upper 64 bits of multiplication of two 64-bit unsigned integers.
-inline auto umul128_upper64(uint64_t x, uint64_t y) noexcept -> uint64_t {
-#if FMT_USE_INT128
-  auto p = static_cast<uint128_opt>(x) * static_cast<uint128_opt>(y);
-  return static_cast<uint64_t>(p >> 64);
-#elif defined(_MSC_VER) && defined(_M_X64)
-  return __umulh(x, y);
-#else
-  return umul128(x, y).high();
-#endif
-}
-
-// Computes upper 128 bits of multiplication of a 64-bit unsigned integer and a
-// 128-bit unsigned integer.
-inline auto umul192_upper128(uint64_t x, uint128_fallback y) noexcept
-    -> uint128_fallback {
-  uint128_fallback r = umul128(x, y.high());
-  r += umul128_upper64(x, y.low());
-  return r;
-}
-
-FMT_API auto get_cached_power(int k) noexcept -> uint128_fallback;
-
-// Type-specific information that Dragonbox uses.
-template <typename T, typename Enable = void> struct float_info;
-
-template <> struct float_info<float> {
-  using carrier_uint = uint32_t;
-  static const int exponent_bits = 8;
-  static const int kappa = 1;
-  static const int big_divisor = 100;
-  static const int small_divisor = 10;
-  static const int min_k = -31;
-  static const int max_k = 46;
-  static const int shorter_interval_tie_lower_threshold = -35;
-  static const int shorter_interval_tie_upper_threshold = -35;
-};
-
-template <> struct float_info<double> {
-  using carrier_uint = uint64_t;
-  static const int exponent_bits = 11;
-  static const int kappa = 2;
-  static const int big_divisor = 1000;
-  static const int small_divisor = 100;
-  static const int min_k = -292;
-  static const int max_k = 341;
-  static const int shorter_interval_tie_lower_threshold = -77;
-  static const int shorter_interval_tie_upper_threshold = -77;
-};
-
-// An 80- or 128-bit floating point number.
-template <typename T>
-struct float_info<T, enable_if_t<std::numeric_limits<T>::digits == 64 ||
-                                 std::numeric_limits<T>::digits == 113 ||
-                                 is_float128<T>::value>> {
-  using carrier_uint = detail::uint128_t;
-  static const int exponent_bits = 15;
-};
-
-// A double-double floating point number.
-template <typename T>
-struct float_info<T, enable_if_t<is_double_double<T>::value>> {
-  using carrier_uint = detail::uint128_t;
-};
-
-template <typename T> struct decimal_fp {
-  using significand_type = typename float_info<T>::carrier_uint;
-  significand_type significand;
-  int exponent;
-};
-
-template <typename T> FMT_API auto to_decimal(T x) noexcept -> decimal_fp<T>;
-}  // namespace dragonbox
-
-// Returns true iff Float has the implicit bit which is not stored.
-template <typename Float> constexpr auto has_implicit_bit() -> bool {
-  // An 80-bit FP number has a 64-bit significand an no implicit bit.
-  return std::numeric_limits<Float>::digits != 64;
-}
-
-// Returns the number of significand bits stored in Float. The implicit bit is
-// not counted since it is not stored.
-template <typename Float> constexpr auto num_significand_bits() -> int {
-  // std::numeric_limits may not support __float128.
-  return is_float128<Float>() ? 112
-                              : (std::numeric_limits<Float>::digits -
-                                 (has_implicit_bit<Float>() ? 1 : 0));
-}
-
-template <typename Float>
-constexpr auto exponent_mask() ->
-    typename dragonbox::float_info<Float>::carrier_uint {
-  using float_uint = typename dragonbox::float_info<Float>::carrier_uint;
-  return ((float_uint(1) << dragonbox::float_info<Float>::exponent_bits) - 1)
-         << num_significand_bits<Float>();
-}
-template <typename Float> constexpr auto exponent_bias() -> int {
-  // std::numeric_limits may not support __float128.
-  return is_float128<Float>() ? 16383
-                              : std::numeric_limits<Float>::max_exponent - 1;
-}
-
-// Writes the exponent exp in the form "[+-]d{2,3}" to buffer.
-template <typename Char, typename It>
-FMT_CONSTEXPR auto write_exponent(int exp, It it) -> It {
-  FMT_ASSERT(-10000 < exp && exp < 10000, "exponent out of range");
-  if (exp < 0) {
-    *it++ = static_cast<Char>('-');
-    exp = -exp;
-  } else {
-    *it++ = static_cast<Char>('+');
-  }
-  if (exp >= 100) {
-    const char* top = digits2(to_unsigned(exp / 100));
-    if (exp >= 1000) *it++ = static_cast<Char>(top[0]);
-    *it++ = static_cast<Char>(top[1]);
-    exp %= 100;
-  }
-  const char* d = digits2(to_unsigned(exp));
-  *it++ = static_cast<Char>(d[0]);
-  *it++ = static_cast<Char>(d[1]);
-  return it;
-}
-
-// A floating-point number f * pow(2, e) where F is an unsigned type.
-template <typename F> struct basic_fp {
-  F f;
-  int e;
-
-  static constexpr const int num_significand_bits =
-      static_cast<int>(sizeof(F) * num_bits<unsigned char>());
-
-  constexpr basic_fp() : f(0), e(0) {}
-  constexpr basic_fp(uint64_t f_val, int e_val) : f(f_val), e(e_val) {}
-
-  // Constructs fp from an IEEE754 floating-point number.
-  template <typename Float> FMT_CONSTEXPR basic_fp(Float n) { assign(n); }
-
-  // Assigns n to this and return true iff predecessor is closer than successor.
-  template <typename Float, FMT_ENABLE_IF(!is_double_double<Float>::value)>
-  FMT_CONSTEXPR auto assign(Float n) -> bool {
-    static_assert(std::numeric_limits<Float>::digits <= 113, "unsupported FP");
-    // Assume Float is in the format [sign][exponent][significand].
-    using carrier_uint = typename dragonbox::float_info<Float>::carrier_uint;
-    const auto num_float_significand_bits =
-        detail::num_significand_bits<Float>();
-    const auto implicit_bit = carrier_uint(1) << num_float_significand_bits;
-    const auto significand_mask = implicit_bit - 1;
-    auto u = bit_cast<carrier_uint>(n);
-    f = static_cast<F>(u & significand_mask);
-    auto biased_e = static_cast<int>((u & exponent_mask<Float>()) >>
-                                     num_float_significand_bits);
-    // The predecessor is closer if n is a normalized power of 2 (f == 0)
-    // other than the smallest normalized number (biased_e > 1).
-    auto is_predecessor_closer = f == 0 && biased_e > 1;
-    if (biased_e == 0)
-      biased_e = 1;  // Subnormals use biased exponent 1 (min exponent).
-    else if (has_implicit_bit<Float>())
-      f += static_cast<F>(implicit_bit);
-    e = biased_e - exponent_bias<Float>() - num_float_significand_bits;
-    if (!has_implicit_bit<Float>()) ++e;
-    return is_predecessor_closer;
-  }
-
-  template <typename Float, FMT_ENABLE_IF(is_double_double<Float>::value)>
-  FMT_CONSTEXPR auto assign(Float n) -> bool {
-    static_assert(std::numeric_limits<double>::is_iec559, "unsupported FP");
-    return assign(static_cast<double>(n));
-  }
-};
-
-using fp = basic_fp<unsigned long long>;
-
-// Normalizes the value converted from double and multiplied by (1 << SHIFT).
-template <int SHIFT = 0, typename F>
-FMT_CONSTEXPR auto normalize(basic_fp<F> value) -> basic_fp<F> {
-  // Handle subnormals.
-  const auto implicit_bit = F(1) << num_significand_bits<double>();
-  const auto shifted_implicit_bit = implicit_bit << SHIFT;
-  while ((value.f & shifted_implicit_bit) == 0) {
-    value.f <<= 1;
-    --value.e;
-  }
-  // Subtract 1 to account for hidden bit.
-  const auto offset = basic_fp<F>::num_significand_bits -
-                      num_significand_bits<double>() - SHIFT - 1;
-  value.f <<= offset;
-  value.e -= offset;
-  return value;
-}
-
-// Computes lhs * rhs / pow(2, 64) rounded to nearest with half-up tie breaking.
-FMT_CONSTEXPR inline auto multiply(uint64_t lhs, uint64_t rhs) -> uint64_t {
-#if FMT_USE_INT128
-  auto product = static_cast<__uint128_t>(lhs) * rhs;
-  auto f = static_cast<uint64_t>(product >> 64);
-  return (static_cast<uint64_t>(product) & (1ULL << 63)) != 0 ? f + 1 : f;
-#else
-  // Multiply 32-bit parts of significands.
-  uint64_t mask = (1ULL << 32) - 1;
-  uint64_t a = lhs >> 32, b = lhs & mask;
-  uint64_t c = rhs >> 32, d = rhs & mask;
-  uint64_t ac = a * c, bc = b * c, ad = a * d, bd = b * d;
-  // Compute mid 64-bit of result and round.
-  uint64_t mid = (bd >> 32) + (ad & mask) + (bc & mask) + (1U << 31);
-  return ac + (ad >> 32) + (bc >> 32) + (mid >> 32);
-#endif
-}
-
-FMT_CONSTEXPR inline auto operator*(fp x, fp y) -> fp {
-  return {multiply(x.f, y.f), x.e + y.e + 64};
-}
-
-template <typename T, bool doublish = num_bits<T>() == num_bits<double>()>
-using convert_float_result =
-    conditional_t<std::is_same<T, float>::value || doublish, double, T>;
-
-template <typename T>
-constexpr auto convert_float(T value) -> convert_float_result<T> {
-  return static_cast<convert_float_result<T>>(value);
-}
-
-template <typename OutputIt, typename Char>
-FMT_NOINLINE FMT_CONSTEXPR auto fill(OutputIt it, size_t n,
-                                     const fill_t<Char>& fill) -> OutputIt {
-  auto fill_size = fill.size();
-  if (fill_size == 1) return detail::fill_n(it, n, fill[0]);
-  auto data = fill.data();
-  for (size_t i = 0; i < n; ++i)
-    it = copy_str<Char>(data, data + fill_size, it);
-  return it;
-}
-
-// Writes the output of f, padded according to format specifications in specs.
-// size: output size in code units.
-// width: output display width in (terminal) column positions.
-template <align::type align = align::left, typename OutputIt, typename Char,
-          typename F>
-FMT_CONSTEXPR auto write_padded(OutputIt out, const format_specs<Char>& specs,
-                                size_t size, size_t width, F&& f) -> OutputIt {
-  static_assert(align == align::left || align == align::right, "");
-  unsigned spec_width = to_unsigned(specs.width);
-  size_t padding = spec_width > width ? spec_width - width : 0;
-  // Shifts are encoded as string literals because static constexpr is not
-  // supported in constexpr functions.
-  auto* shifts = align == align::left ? "\x1f\x1f\x00\x01" : "\x00\x1f\x00\x01";
-  size_t left_padding = padding >> shifts[specs.align];
-  size_t right_padding = padding - left_padding;
-  auto it = reserve(out, size + padding * specs.fill.size());
-  if (left_padding != 0) it = fill(it, left_padding, specs.fill);
-  it = f(it);
-  if (right_padding != 0) it = fill(it, right_padding, specs.fill);
-  return base_iterator(out, it);
-}
-
-template <align::type align = align::left, typename OutputIt, typename Char,
-          typename F>
-constexpr auto write_padded(OutputIt out, const format_specs<Char>& specs,
-                            size_t size, F&& f) -> OutputIt {
-  return write_padded<align>(out, specs, size, size, f);
-}
-
-template <align::type align = align::left, typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write_bytes(OutputIt out, string_view bytes,
-                               const format_specs<Char>& specs) -> OutputIt {
-  return write_padded<align>(
-      out, specs, bytes.size(), [bytes](reserve_iterator<OutputIt> it) {
-        const char* data = bytes.data();
-        return copy_str<Char>(data, data + bytes.size(), it);
-      });
-}
-
-template <typename Char, typename OutputIt, typename UIntPtr>
-auto write_ptr(OutputIt out, UIntPtr value, const format_specs<Char>* specs)
-    -> OutputIt {
-  int num_digits = count_digits<4>(value);
-  auto size = to_unsigned(num_digits) + size_t(2);
-  auto write = [=](reserve_iterator<OutputIt> it) {
-    *it++ = static_cast<Char>('0');
-    *it++ = static_cast<Char>('x');
-    return format_uint<4, Char>(it, value, num_digits);
-  };
-  return specs ? write_padded<align::right>(out, *specs, size, write)
-               : base_iterator(out, write(reserve(out, size)));
-}
-
-// Returns true iff the code point cp is printable.
-FMT_API auto is_printable(uint32_t cp) -> bool;
-
-inline auto needs_escape(uint32_t cp) -> bool {
-  return cp < 0x20 || cp == 0x7f || cp == '"' || cp == '\\' ||
-         !is_printable(cp);
-}
-
-template <typename Char> struct find_escape_result {
-  const Char* begin;
-  const Char* end;
-  uint32_t cp;
-};
-
-template <typename Char>
-using make_unsigned_char =
-    typename conditional_t<std::is_integral<Char>::value,
-                           std::make_unsigned<Char>,
-                           type_identity<uint32_t>>::type;
-
-template <typename Char>
-auto find_escape(const Char* begin, const Char* end)
-    -> find_escape_result<Char> {
-  for (; begin != end; ++begin) {
-    uint32_t cp = static_cast<make_unsigned_char<Char>>(*begin);
-    if (const_check(sizeof(Char) == 1) && cp >= 0x80) continue;
-    if (needs_escape(cp)) return {begin, begin + 1, cp};
-  }
-  return {begin, nullptr, 0};
-}
-
-inline auto find_escape(const char* begin, const char* end)
-    -> find_escape_result<char> {
-  if (!is_utf8()) return find_escape<char>(begin, end);
-  auto result = find_escape_result<char>{end, nullptr, 0};
-  for_each_codepoint(string_view(begin, to_unsigned(end - begin)),
-                     [&](uint32_t cp, string_view sv) {
-                       if (needs_escape(cp)) {
-                         result = {sv.begin(), sv.end(), cp};
-                         return false;
-                       }
-                       return true;
-                     });
-  return result;
-}
-
-#define FMT_STRING_IMPL(s, base, explicit)                                    \
-  [] {                                                                        \
-    /* Use the hidden visibility as a workaround for a GCC bug (#1973). */    \
-    /* Use a macro-like name to avoid shadowing warnings. */                  \
-    struct FMT_VISIBILITY("hidden") FMT_COMPILE_STRING : base {               \
-      using char_type FMT_MAYBE_UNUSED = fmt::remove_cvref_t<decltype(s[0])>; \
-      FMT_MAYBE_UNUSED FMT_CONSTEXPR explicit                                 \
-      operator fmt::basic_string_view<char_type>() const {                    \
-        return fmt::detail_exported::compile_string_to_view<char_type>(s);    \
-      }                                                                       \
-    };                                                                        \
-    return FMT_COMPILE_STRING();                                              \
-  }()
-
-/**
-  \rst
-  Constructs a compile-time format string from a string literal *s*.
-
-  **Example**::
-
-    // A compile-time error because 'd' is an invalid specifier for strings.
-    std::string s = fmt::format(FMT_STRING("{:d}"), "foo");
-  \endrst
- */
-#define FMT_STRING(s) FMT_STRING_IMPL(s, fmt::detail::compile_string, )
-
-template <size_t width, typename Char, typename OutputIt>
-auto write_codepoint(OutputIt out, char prefix, uint32_t cp) -> OutputIt {
-  *out++ = static_cast<Char>('\\');
-  *out++ = static_cast<Char>(prefix);
-  Char buf[width];
-  fill_n(buf, width, static_cast<Char>('0'));
-  format_uint<4>(buf, cp, width);
-  return copy_str<Char>(buf, buf + width, out);
-}
-
-template <typename OutputIt, typename Char>
-auto write_escaped_cp(OutputIt out, const find_escape_result<Char>& escape)
-    -> OutputIt {
-  auto c = static_cast<Char>(escape.cp);
-  switch (escape.cp) {
-  case '\n':
-    *out++ = static_cast<Char>('\\');
-    c = static_cast<Char>('n');
-    break;
-  case '\r':
-    *out++ = static_cast<Char>('\\');
-    c = static_cast<Char>('r');
-    break;
-  case '\t':
-    *out++ = static_cast<Char>('\\');
-    c = static_cast<Char>('t');
-    break;
-  case '"':
-    FMT_FALLTHROUGH;
-  case '\'':
-    FMT_FALLTHROUGH;
-  case '\\':
-    *out++ = static_cast<Char>('\\');
-    break;
-  default:
-    if (escape.cp < 0x100) {
-      return write_codepoint<2, Char>(out, 'x', escape.cp);
-    }
-    if (escape.cp < 0x10000) {
-      return write_codepoint<4, Char>(out, 'u', escape.cp);
-    }
-    if (escape.cp < 0x110000) {
-      return write_codepoint<8, Char>(out, 'U', escape.cp);
-    }
-    for (Char escape_char : basic_string_view<Char>(
-             escape.begin, to_unsigned(escape.end - escape.begin))) {
-      out = write_codepoint<2, Char>(out, 'x',
-                                     static_cast<uint32_t>(escape_char) & 0xFF);
-    }
-    return out;
-  }
-  *out++ = c;
-  return out;
-}
-
-template <typename Char, typename OutputIt>
-auto write_escaped_string(OutputIt out, basic_string_view<Char> str)
-    -> OutputIt {
-  *out++ = static_cast<Char>('"');
-  auto begin = str.begin(), end = str.end();
-  do {
-    auto escape = find_escape(begin, end);
-    out = copy_str<Char>(begin, escape.begin, out);
-    begin = escape.end;
-    if (!begin) break;
-    out = write_escaped_cp<OutputIt, Char>(out, escape);
-  } while (begin != end);
-  *out++ = static_cast<Char>('"');
-  return out;
-}
-
-template <typename Char, typename OutputIt>
-auto write_escaped_char(OutputIt out, Char v) -> OutputIt {
-  Char v_array[1] = {v};
-  *out++ = static_cast<Char>('\'');
-  if ((needs_escape(static_cast<uint32_t>(v)) && v != static_cast<Char>('"')) ||
-      v == static_cast<Char>('\'')) {
-    out = write_escaped_cp(out,
-                           find_escape_result<Char>{v_array, v_array + 1,
-                                                    static_cast<uint32_t>(v)});
-  } else {
-    *out++ = v;
-  }
-  *out++ = static_cast<Char>('\'');
-  return out;
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write_char(OutputIt out, Char value,
-                              const format_specs<Char>& specs) -> OutputIt {
-  bool is_debug = specs.type == presentation_type::debug;
-  return write_padded(out, specs, 1, [=](reserve_iterator<OutputIt> it) {
-    if (is_debug) return write_escaped_char(it, value);
-    *it++ = value;
-    return it;
-  });
-}
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, Char value,
-                         const format_specs<Char>& specs, locale_ref loc = {})
-    -> OutputIt {
-  // char is formatted as unsigned char for consistency across platforms.
-  using unsigned_type =
-      conditional_t<std::is_same<Char, char>::value, unsigned char, unsigned>;
-  return check_char_specs(specs)
-             ? write_char(out, value, specs)
-             : write(out, static_cast<unsigned_type>(value), specs, loc);
-}
-
-// Data for write_int that doesn't depend on output iterator type. It is used to
-// avoid template code bloat.
-template <typename Char> struct write_int_data {
-  size_t size;
-  size_t padding;
-
-  FMT_CONSTEXPR write_int_data(int num_digits, unsigned prefix,
-                               const format_specs<Char>& specs)
-      : size((prefix >> 24) + to_unsigned(num_digits)), padding(0) {
-    if (specs.align == align::numeric) {
-      auto width = to_unsigned(specs.width);
-      if (width > size) {
-        padding = width - size;
-        size = width;
-      }
-    } else if (specs.precision > num_digits) {
-      size = (prefix >> 24) + to_unsigned(specs.precision);
-      padding = to_unsigned(specs.precision - num_digits);
-    }
-  }
-};
-
-// Writes an integer in the format
-//   <left-padding><prefix><numeric-padding><digits><right-padding>
-// where <digits> are written by write_digits(it).
-// prefix contains chars in three lower bytes and the size in the fourth byte.
-template <typename OutputIt, typename Char, typename W>
-FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, int num_digits,
-                                        unsigned prefix,
-                                        const format_specs<Char>& specs,
-                                        W write_digits) -> OutputIt {
-  // Slightly faster check for specs.width == 0 && specs.precision == -1.
-  if ((specs.width | (specs.precision + 1)) == 0) {
-    auto it = reserve(out, to_unsigned(num_digits) + (prefix >> 24));
-    if (prefix != 0) {
-      for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
-        *it++ = static_cast<Char>(p & 0xff);
-    }
-    return base_iterator(out, write_digits(it));
-  }
-  auto data = write_int_data<Char>(num_digits, prefix, specs);
-  return write_padded<align::right>(
-      out, specs, data.size, [=](reserve_iterator<OutputIt> it) {
-        for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
-          *it++ = static_cast<Char>(p & 0xff);
-        it = detail::fill_n(it, data.padding, static_cast<Char>('0'));
-        return write_digits(it);
-      });
-}
-
-template <typename Char> class digit_grouping {
- private:
-  std::string grouping_;
-  std::basic_string<Char> thousands_sep_;
-
-  struct next_state {
-    std::string::const_iterator group;
-    int pos;
-  };
-  auto initial_state() const -> next_state { return {grouping_.begin(), 0}; }
-
-  // Returns the next digit group separator position.
-  auto next(next_state& state) const -> int {
-    if (thousands_sep_.empty()) return max_value<int>();
-    if (state.group == grouping_.end()) return state.pos += grouping_.back();
-    if (*state.group <= 0 || *state.group == max_value<char>())
-      return max_value<int>();
-    state.pos += *state.group++;
-    return state.pos;
-  }
-
- public:
-  explicit digit_grouping(locale_ref loc, bool localized = true) {
-    if (!localized) return;
-    auto sep = thousands_sep<Char>(loc);
-    grouping_ = sep.grouping;
-    if (sep.thousands_sep) thousands_sep_.assign(1, sep.thousands_sep);
-  }
-  digit_grouping(std::string grouping, std::basic_string<Char> sep)
-      : grouping_(std::move(grouping)), thousands_sep_(std::move(sep)) {}
-
-  auto has_separator() const -> bool { return !thousands_sep_.empty(); }
-
-  auto count_separators(int num_digits) const -> int {
-    int count = 0;
-    auto state = initial_state();
-    while (num_digits > next(state)) ++count;
-    return count;
-  }
-
-  // Applies grouping to digits and write the output to out.
-  template <typename Out, typename C>
-  auto apply(Out out, basic_string_view<C> digits) const -> Out {
-    auto num_digits = static_cast<int>(digits.size());
-    auto separators = basic_memory_buffer<int>();
-    separators.push_back(0);
-    auto state = initial_state();
-    while (int i = next(state)) {
-      if (i >= num_digits) break;
-      separators.push_back(i);
-    }
-    for (int i = 0, sep_index = static_cast<int>(separators.size() - 1);
-         i < num_digits; ++i) {
-      if (num_digits - i == separators[sep_index]) {
-        out =
-            copy_str<Char>(thousands_sep_.data(),
-                           thousands_sep_.data() + thousands_sep_.size(), out);
-        --sep_index;
-      }
-      *out++ = static_cast<Char>(digits[to_unsigned(i)]);
-    }
-    return out;
-  }
-};
-
-FMT_CONSTEXPR inline void prefix_append(unsigned& prefix, unsigned value) {
-  prefix |= prefix != 0 ? value << 8 : value;
-  prefix += (1u + (value > 0xff ? 1 : 0)) << 24;
-}
-
-// Writes a decimal integer with digit grouping.
-template <typename OutputIt, typename UInt, typename Char>
-auto write_int(OutputIt out, UInt value, unsigned prefix,
-               const format_specs<Char>& specs,
-               const digit_grouping<Char>& grouping) -> OutputIt {
-  static_assert(std::is_same<uint64_or_128_t<UInt>, UInt>::value, "");
-  int num_digits = 0;
-  auto buffer = memory_buffer();
-  switch (specs.type) {
-  case presentation_type::none:
-  case presentation_type::dec: {
-    num_digits = count_digits(value);
-    format_decimal<char>(appender(buffer), value, num_digits);
-    break;
-  }
-  case presentation_type::hex_lower:
-  case presentation_type::hex_upper: {
-    bool upper = specs.type == presentation_type::hex_upper;
-    if (specs.alt)
-      prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0');
-    num_digits = count_digits<4>(value);
-    format_uint<4, char>(appender(buffer), value, num_digits, upper);
-    break;
-  }
-  case presentation_type::bin_lower:
-  case presentation_type::bin_upper: {
-    bool upper = specs.type == presentation_type::bin_upper;
-    if (specs.alt)
-      prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0');
-    num_digits = count_digits<1>(value);
-    format_uint<1, char>(appender(buffer), value, num_digits);
-    break;
-  }
-  case presentation_type::oct: {
-    num_digits = count_digits<3>(value);
-    // Octal prefix '0' is counted as a digit, so only add it if precision
-    // is not greater than the number of digits.
-    if (specs.alt && specs.precision <= num_digits && value != 0)
-      prefix_append(prefix, '0');
-    format_uint<3, char>(appender(buffer), value, num_digits);
-    break;
-  }
-  case presentation_type::chr:
-    return write_char(out, static_cast<Char>(value), specs);
-  default:
-    throw_format_error("invalid format specifier");
-  }
-
-  unsigned size = (prefix != 0 ? prefix >> 24 : 0) + to_unsigned(num_digits) +
-                  to_unsigned(grouping.count_separators(num_digits));
-  return write_padded<align::right>(
-      out, specs, size, size, [&](reserve_iterator<OutputIt> it) {
-        for (unsigned p = prefix & 0xffffff; p != 0; p >>= 8)
-          *it++ = static_cast<Char>(p & 0xff);
-        return grouping.apply(it, string_view(buffer.data(), buffer.size()));
-      });
-}
-
-// Writes a localized value.
-FMT_API auto write_loc(appender out, loc_value value,
-                       const format_specs<>& specs, locale_ref loc) -> bool;
-template <typename OutputIt, typename Char>
-inline auto write_loc(OutputIt, loc_value, const format_specs<Char>&,
-                      locale_ref) -> bool {
-  return false;
-}
-
-template <typename UInt> struct write_int_arg {
-  UInt abs_value;
-  unsigned prefix;
-};
-
-template <typename T>
-FMT_CONSTEXPR auto make_write_int_arg(T value, sign_t sign)
-    -> write_int_arg<uint32_or_64_or_128_t<T>> {
-  auto prefix = 0u;
-  auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
-  if (is_negative(value)) {
-    prefix = 0x01000000 | '-';
-    abs_value = 0 - abs_value;
-  } else {
-    constexpr const unsigned prefixes[4] = {0, 0, 0x1000000u | '+',
-                                            0x1000000u | ' '};
-    prefix = prefixes[sign];
-  }
-  return {abs_value, prefix};
-}
-
-template <typename Char = char> struct loc_writer {
-  buffer_appender<Char> out;
-  const format_specs<Char>& specs;
-  std::basic_string<Char> sep;
-  std::string grouping;
-  std::basic_string<Char> decimal_point;
-
-  template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
-  auto operator()(T value) -> bool {
-    auto arg = make_write_int_arg(value, specs.sign);
-    write_int(out, static_cast<uint64_or_128_t<T>>(arg.abs_value), arg.prefix,
-              specs, digit_grouping<Char>(grouping, sep));
-    return true;
-  }
-
-  template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
-  auto operator()(T) -> bool {
-    return false;
-  }
-};
-
-template <typename Char, typename OutputIt, typename T>
-FMT_CONSTEXPR FMT_INLINE auto write_int(OutputIt out, write_int_arg<T> arg,
-                                        const format_specs<Char>& specs,
-                                        locale_ref) -> OutputIt {
-  static_assert(std::is_same<T, uint32_or_64_or_128_t<T>>::value, "");
-  auto abs_value = arg.abs_value;
-  auto prefix = arg.prefix;
-  switch (specs.type) {
-  case presentation_type::none:
-  case presentation_type::dec: {
-    auto num_digits = count_digits(abs_value);
-    return write_int(
-        out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
-          return format_decimal<Char>(it, abs_value, num_digits).end;
-        });
-  }
-  case presentation_type::hex_lower:
-  case presentation_type::hex_upper: {
-    bool upper = specs.type == presentation_type::hex_upper;
-    if (specs.alt)
-      prefix_append(prefix, unsigned(upper ? 'X' : 'x') << 8 | '0');
-    int num_digits = count_digits<4>(abs_value);
-    return write_int(
-        out, num_digits, prefix, specs, [=](reserve_iterator<OutputIt> it) {
-          return format_uint<4, Char>(it, abs_value, num_digits, upper);
-        });
-  }
-  case presentation_type::bin_lower:
-  case presentation_type::bin_upper: {
-    bool upper = specs.type == presentation_type::bin_upper;
-    if (specs.alt)
-      prefix_append(prefix, unsigned(upper ? 'B' : 'b') << 8 | '0');
-    int num_digits = count_digits<1>(abs_value);
-    return write_int(out, num_digits, prefix, specs,
-                     [=](reserve_iterator<OutputIt> it) {
-                       return format_uint<1, Char>(it, abs_value, num_digits);
-                     });
-  }
-  case presentation_type::oct: {
-    int num_digits = count_digits<3>(abs_value);
-    // Octal prefix '0' is counted as a digit, so only add it if precision
-    // is not greater than the number of digits.
-    if (specs.alt && specs.precision <= num_digits && abs_value != 0)
-      prefix_append(prefix, '0');
-    return write_int(out, num_digits, prefix, specs,
-                     [=](reserve_iterator<OutputIt> it) {
-                       return format_uint<3, Char>(it, abs_value, num_digits);
-                     });
-  }
-  case presentation_type::chr:
-    return write_char(out, static_cast<Char>(abs_value), specs);
-  default:
-    throw_format_error("invalid format specifier");
-  }
-  return out;
-}
-template <typename Char, typename OutputIt, typename T>
-FMT_CONSTEXPR FMT_NOINLINE auto write_int_noinline(
-    OutputIt out, write_int_arg<T> arg, const format_specs<Char>& specs,
-    locale_ref loc) -> OutputIt {
-  return write_int(out, arg, specs, loc);
-}
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_integral<T>::value &&
-                        !std::is_same<T, bool>::value &&
-                        std::is_same<OutputIt, buffer_appender<Char>>::value)>
-FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
-                                    const format_specs<Char>& specs,
-                                    locale_ref loc) -> OutputIt {
-  if (specs.localized && write_loc(out, value, specs, loc)) return out;
-  return write_int_noinline(out, make_write_int_arg(value, specs.sign), specs,
-                            loc);
-}
-// An inlined version of write used in format string compilation.
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_integral<T>::value &&
-                        !std::is_same<T, bool>::value &&
-                        !std::is_same<OutputIt, buffer_appender<Char>>::value)>
-FMT_CONSTEXPR FMT_INLINE auto write(OutputIt out, T value,
-                                    const format_specs<Char>& specs,
-                                    locale_ref loc) -> OutputIt {
-  if (specs.localized && write_loc(out, value, specs, loc)) return out;
-  return write_int(out, make_write_int_arg(value, specs.sign), specs, loc);
-}
-
-// An output iterator that counts the number of objects written to it and
-// discards them.
-class counting_iterator {
- private:
-  size_t count_;
-
- public:
-  using iterator_category = std::output_iterator_tag;
-  using difference_type = std::ptrdiff_t;
-  using pointer = void;
-  using reference = void;
-  FMT_UNCHECKED_ITERATOR(counting_iterator);
-
-  struct value_type {
-    template <typename T> FMT_CONSTEXPR void operator=(const T&) {}
-  };
-
-  FMT_CONSTEXPR counting_iterator() : count_(0) {}
-
-  FMT_CONSTEXPR auto count() const -> size_t { return count_; }
-
-  FMT_CONSTEXPR auto operator++() -> counting_iterator& {
-    ++count_;
-    return *this;
-  }
-  FMT_CONSTEXPR auto operator++(int) -> counting_iterator {
-    auto it = *this;
-    ++*this;
-    return it;
-  }
-
-  FMT_CONSTEXPR friend auto operator+(counting_iterator it, difference_type n)
-      -> counting_iterator {
-    it.count_ += static_cast<size_t>(n);
-    return it;
-  }
-
-  FMT_CONSTEXPR auto operator*() const -> value_type { return {}; }
-};
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> s,
-                         const format_specs<Char>& specs) -> OutputIt {
-  auto data = s.data();
-  auto size = s.size();
-  if (specs.precision >= 0 && to_unsigned(specs.precision) < size)
-    size = code_point_index(s, to_unsigned(specs.precision));
-  bool is_debug = specs.type == presentation_type::debug;
-  size_t width = 0;
-  if (specs.width != 0) {
-    if (is_debug)
-      width = write_escaped_string(counting_iterator{}, s).count();
-    else
-      width = compute_width(basic_string_view<Char>(data, size));
-  }
-  return write_padded(out, specs, size, width,
-                      [=](reserve_iterator<OutputIt> it) {
-                        if (is_debug) return write_escaped_string(it, s);
-                        return copy_str<Char>(data, data + size, it);
-                      });
-}
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out,
-                         basic_string_view<type_identity_t<Char>> s,
-                         const format_specs<Char>& specs, locale_ref)
-    -> OutputIt {
-  return write(out, s, specs);
-}
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, const Char* s,
-                         const format_specs<Char>& specs, locale_ref)
-    -> OutputIt {
-  if (specs.type == presentation_type::pointer)
-    return write_ptr<Char>(out, bit_cast<uintptr_t>(s), &specs);
-  if (!s) throw_format_error("string pointer is null");
-  return write(out, basic_string_view<Char>(s), specs, {});
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_integral<T>::value &&
-                        !std::is_same<T, bool>::value &&
-                        !std::is_same<T, Char>::value)>
-FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
-  auto abs_value = static_cast<uint32_or_64_or_128_t<T>>(value);
-  bool negative = is_negative(value);
-  // Don't do -abs_value since it trips unsigned-integer-overflow sanitizer.
-  if (negative) abs_value = ~abs_value + 1;
-  int num_digits = count_digits(abs_value);
-  auto size = (negative ? 1 : 0) + static_cast<size_t>(num_digits);
-  auto it = reserve(out, size);
-  if (auto ptr = to_pointer<Char>(it, size)) {
-    if (negative) *ptr++ = static_cast<Char>('-');
-    format_decimal<Char>(ptr, abs_value, num_digits);
-    return out;
-  }
-  if (negative) *it++ = static_cast<Char>('-');
-  it = format_decimal<Char>(it, abs_value, num_digits).end;
-  return base_iterator(out, it);
-}
-
-// DEPRECATED!
-template <typename Char>
-FMT_CONSTEXPR auto parse_align(const Char* begin, const Char* end,
-                               format_specs<Char>& specs) -> const Char* {
-  FMT_ASSERT(begin != end, "");
-  auto align = align::none;
-  auto p = begin + code_point_length(begin);
-  if (end - p <= 0) p = begin;
-  for (;;) {
-    switch (to_ascii(*p)) {
-    case '<':
-      align = align::left;
-      break;
-    case '>':
-      align = align::right;
-      break;
-    case '^':
-      align = align::center;
-      break;
-    }
-    if (align != align::none) {
-      if (p != begin) {
-        auto c = *begin;
-        if (c == '}') return begin;
-        if (c == '{') {
-          throw_format_error("invalid fill character '{'");
-          return begin;
-        }
-        specs.fill = {begin, to_unsigned(p - begin)};
-        begin = p + 1;
-      } else {
-        ++begin;
-      }
-      break;
-    } else if (p == begin) {
-      break;
-    }
-    p = begin;
-  }
-  specs.align = align;
-  return begin;
-}
-
-// A floating-point presentation format.
-enum class float_format : unsigned char {
-  general,  // General: exponent notation or fixed point based on magnitude.
-  exp,      // Exponent notation with the default precision of 6, e.g. 1.2e-3.
-  fixed,    // Fixed point with the default precision of 6, e.g. 0.0012.
-  hex
-};
-
-struct float_specs {
-  int precision;
-  float_format format : 8;
-  sign_t sign : 8;
-  bool upper : 1;
-  bool locale : 1;
-  bool binary32 : 1;
-  bool showpoint : 1;
-};
-
-template <typename Char>
-FMT_CONSTEXPR auto parse_float_type_spec(const format_specs<Char>& specs)
-    -> float_specs {
-  auto result = float_specs();
-  result.showpoint = specs.alt;
-  result.locale = specs.localized;
-  switch (specs.type) {
-  case presentation_type::none:
-    result.format = float_format::general;
-    break;
-  case presentation_type::general_upper:
-    result.upper = true;
-    FMT_FALLTHROUGH;
-  case presentation_type::general_lower:
-    result.format = float_format::general;
-    break;
-  case presentation_type::exp_upper:
-    result.upper = true;
-    FMT_FALLTHROUGH;
-  case presentation_type::exp_lower:
-    result.format = float_format::exp;
-    result.showpoint |= specs.precision != 0;
-    break;
-  case presentation_type::fixed_upper:
-    result.upper = true;
-    FMT_FALLTHROUGH;
-  case presentation_type::fixed_lower:
-    result.format = float_format::fixed;
-    result.showpoint |= specs.precision != 0;
-    break;
-  case presentation_type::hexfloat_upper:
-    result.upper = true;
-    FMT_FALLTHROUGH;
-  case presentation_type::hexfloat_lower:
-    result.format = float_format::hex;
-    break;
-  default:
-    throw_format_error("invalid format specifier");
-    break;
-  }
-  return result;
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR20 auto write_nonfinite(OutputIt out, bool isnan,
-                                     format_specs<Char> specs,
-                                     const float_specs& fspecs) -> OutputIt {
-  auto str =
-      isnan ? (fspecs.upper ? "NAN" : "nan") : (fspecs.upper ? "INF" : "inf");
-  constexpr size_t str_size = 3;
-  auto sign = fspecs.sign;
-  auto size = str_size + (sign ? 1 : 0);
-  // Replace '0'-padding with space for non-finite values.
-  const bool is_zero_fill =
-      specs.fill.size() == 1 && *specs.fill.data() == static_cast<Char>('0');
-  if (is_zero_fill) specs.fill[0] = static_cast<Char>(' ');
-  return write_padded(out, specs, size, [=](reserve_iterator<OutputIt> it) {
-    if (sign) *it++ = detail::sign<Char>(sign);
-    return copy_str<Char>(str, str + str_size, it);
-  });
-}
-
-// A decimal floating-point number significand * pow(10, exp).
-struct big_decimal_fp {
-  const char* significand;
-  int significand_size;
-  int exponent;
-};
-
-constexpr auto get_significand_size(const big_decimal_fp& f) -> int {
-  return f.significand_size;
-}
-template <typename T>
-inline auto get_significand_size(const dragonbox::decimal_fp<T>& f) -> int {
-  return count_digits(f.significand);
-}
-
-template <typename Char, typename OutputIt>
-constexpr auto write_significand(OutputIt out, const char* significand,
-                                 int significand_size) -> OutputIt {
-  return copy_str<Char>(significand, significand + significand_size, out);
-}
-template <typename Char, typename OutputIt, typename UInt>
-inline auto write_significand(OutputIt out, UInt significand,
-                              int significand_size) -> OutputIt {
-  return format_decimal<Char>(out, significand, significand_size).end;
-}
-template <typename Char, typename OutputIt, typename T, typename Grouping>
-FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
-                                       int significand_size, int exponent,
-                                       const Grouping& grouping) -> OutputIt {
-  if (!grouping.has_separator()) {
-    out = write_significand<Char>(out, significand, significand_size);
-    return detail::fill_n(out, exponent, static_cast<Char>('0'));
-  }
-  auto buffer = memory_buffer();
-  write_significand<char>(appender(buffer), significand, significand_size);
-  detail::fill_n(appender(buffer), exponent, '0');
-  return grouping.apply(out, string_view(buffer.data(), buffer.size()));
-}
-
-template <typename Char, typename UInt,
-          FMT_ENABLE_IF(std::is_integral<UInt>::value)>
-inline auto write_significand(Char* out, UInt significand, int significand_size,
-                              int integral_size, Char decimal_point) -> Char* {
-  if (!decimal_point)
-    return format_decimal(out, significand, significand_size).end;
-  out += significand_size + 1;
-  Char* end = out;
-  int floating_size = significand_size - integral_size;
-  for (int i = floating_size / 2; i > 0; --i) {
-    out -= 2;
-    copy2(out, digits2(static_cast<std::size_t>(significand % 100)));
-    significand /= 100;
-  }
-  if (floating_size % 2 != 0) {
-    *--out = static_cast<Char>('0' + significand % 10);
-    significand /= 10;
-  }
-  *--out = decimal_point;
-  format_decimal(out - integral_size, significand, integral_size);
-  return end;
-}
-
-template <typename OutputIt, typename UInt, typename Char,
-          FMT_ENABLE_IF(!std::is_pointer<remove_cvref_t<OutputIt>>::value)>
-inline auto write_significand(OutputIt out, UInt significand,
-                              int significand_size, int integral_size,
-                              Char decimal_point) -> OutputIt {
-  // Buffer is large enough to hold digits (digits10 + 1) and a decimal point.
-  Char buffer[digits10<UInt>() + 2];
-  auto end = write_significand(buffer, significand, significand_size,
-                               integral_size, decimal_point);
-  return detail::copy_str_noinline<Char>(buffer, end, out);
-}
-
-template <typename OutputIt, typename Char>
-FMT_CONSTEXPR auto write_significand(OutputIt out, const char* significand,
-                                     int significand_size, int integral_size,
-                                     Char decimal_point) -> OutputIt {
-  out = detail::copy_str_noinline<Char>(significand,
-                                        significand + integral_size, out);
-  if (!decimal_point) return out;
-  *out++ = decimal_point;
-  return detail::copy_str_noinline<Char>(significand + integral_size,
-                                         significand + significand_size, out);
-}
-
-template <typename OutputIt, typename Char, typename T, typename Grouping>
-FMT_CONSTEXPR20 auto write_significand(OutputIt out, T significand,
-                                       int significand_size, int integral_size,
-                                       Char decimal_point,
-                                       const Grouping& grouping) -> OutputIt {
-  if (!grouping.has_separator()) {
-    return write_significand(out, significand, significand_size, integral_size,
-                             decimal_point);
-  }
-  auto buffer = basic_memory_buffer<Char>();
-  write_significand(buffer_appender<Char>(buffer), significand,
-                    significand_size, integral_size, decimal_point);
-  grouping.apply(
-      out, basic_string_view<Char>(buffer.data(), to_unsigned(integral_size)));
-  return detail::copy_str_noinline<Char>(buffer.data() + integral_size,
-                                         buffer.end(), out);
-}
-
-template <typename OutputIt, typename DecimalFP, typename Char,
-          typename Grouping = digit_grouping<Char>>
-FMT_CONSTEXPR20 auto do_write_float(OutputIt out, const DecimalFP& f,
-                                    const format_specs<Char>& specs,
-                                    float_specs fspecs, locale_ref loc)
-    -> OutputIt {
-  auto significand = f.significand;
-  int significand_size = get_significand_size(f);
-  const Char zero = static_cast<Char>('0');
-  auto sign = fspecs.sign;
-  size_t size = to_unsigned(significand_size) + (sign ? 1 : 0);
-  using iterator = reserve_iterator<OutputIt>;
-
-  Char decimal_point =
-      fspecs.locale ? detail::decimal_point<Char>(loc) : static_cast<Char>('.');
-
-  int output_exp = f.exponent + significand_size - 1;
-  auto use_exp_format = [=]() {
-    if (fspecs.format == float_format::exp) return true;
-    if (fspecs.format != float_format::general) return false;
-    // Use the fixed notation if the exponent is in [exp_lower, exp_upper),
-    // e.g. 0.0001 instead of 1e-04. Otherwise use the exponent notation.
-    const int exp_lower = -4, exp_upper = 16;
-    return output_exp < exp_lower ||
-           output_exp >= (fspecs.precision > 0 ? fspecs.precision : exp_upper);
-  };
-  if (use_exp_format()) {
-    int num_zeros = 0;
-    if (fspecs.showpoint) {
-      num_zeros = fspecs.precision - significand_size;
-      if (num_zeros < 0) num_zeros = 0;
-      size += to_unsigned(num_zeros);
-    } else if (significand_size == 1) {
-      decimal_point = Char();
-    }
-    auto abs_output_exp = output_exp >= 0 ? output_exp : -output_exp;
-    int exp_digits = 2;
-    if (abs_output_exp >= 100) exp_digits = abs_output_exp >= 1000 ? 4 : 3;
-
-    size += to_unsigned((decimal_point ? 1 : 0) + 2 + exp_digits);
-    char exp_char = fspecs.upper ? 'E' : 'e';
-    auto write = [=](iterator it) {
-      if (sign) *it++ = detail::sign<Char>(sign);
-      // Insert a decimal point after the first digit and add an exponent.
-      it = write_significand(it, significand, significand_size, 1,
-                             decimal_point);
-      if (num_zeros > 0) it = detail::fill_n(it, num_zeros, zero);
-      *it++ = static_cast<Char>(exp_char);
-      return write_exponent<Char>(output_exp, it);
-    };
-    return specs.width > 0 ? write_padded<align::right>(out, specs, size, write)
-                           : base_iterator(out, write(reserve(out, size)));
-  }
-
-  int exp = f.exponent + significand_size;
-  if (f.exponent >= 0) {
-    // 1234e5 -> 123400000[.0+]
-    size += to_unsigned(f.exponent);
-    int num_zeros = fspecs.precision - exp;
-    abort_fuzzing_if(num_zeros > 5000);
-    if (fspecs.showpoint) {
-      ++size;
-      if (num_zeros <= 0 && fspecs.format != float_format::fixed) num_zeros = 0;
-      if (num_zeros > 0) size += to_unsigned(num_zeros);
-    }
-    auto grouping = Grouping(loc, fspecs.locale);
-    size += to_unsigned(grouping.count_separators(exp));
-    return write_padded<align::right>(out, specs, size, [&](iterator it) {
-      if (sign) *it++ = detail::sign<Char>(sign);
-      it = write_significand<Char>(it, significand, significand_size,
-                                   f.exponent, grouping);
-      if (!fspecs.showpoint) return it;
-      *it++ = decimal_point;
-      return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
-    });
-  } else if (exp > 0) {
-    // 1234e-2 -> 12.34[0+]
-    int num_zeros = fspecs.showpoint ? fspecs.precision - significand_size : 0;
-    size += 1 + to_unsigned(num_zeros > 0 ? num_zeros : 0);
-    auto grouping = Grouping(loc, fspecs.locale);
-    size += to_unsigned(grouping.count_separators(exp));
-    return write_padded<align::right>(out, specs, size, [&](iterator it) {
-      if (sign) *it++ = detail::sign<Char>(sign);
-      it = write_significand(it, significand, significand_size, exp,
-                             decimal_point, grouping);
-      return num_zeros > 0 ? detail::fill_n(it, num_zeros, zero) : it;
-    });
-  }
-  // 1234e-6 -> 0.001234
-  int num_zeros = -exp;
-  if (significand_size == 0 && fspecs.precision >= 0 &&
-      fspecs.precision < num_zeros) {
-    num_zeros = fspecs.precision;
-  }
-  bool pointy = num_zeros != 0 || significand_size != 0 || fspecs.showpoint;
-  size += 1 + (pointy ? 1 : 0) + to_unsigned(num_zeros);
-  return write_padded<align::right>(out, specs, size, [&](iterator it) {
-    if (sign) *it++ = detail::sign<Char>(sign);
-    *it++ = zero;
-    if (!pointy) return it;
-    *it++ = decimal_point;
-    it = detail::fill_n(it, num_zeros, zero);
-    return write_significand<Char>(it, significand, significand_size);
-  });
-}
-
-template <typename Char> class fallback_digit_grouping {
- public:
-  constexpr fallback_digit_grouping(locale_ref, bool) {}
-
-  constexpr auto has_separator() const -> bool { return false; }
-
-  constexpr auto count_separators(int) const -> int { return 0; }
-
-  template <typename Out, typename C>
-  constexpr auto apply(Out out, basic_string_view<C>) const -> Out {
-    return out;
-  }
-};
-
-template <typename OutputIt, typename DecimalFP, typename Char>
-FMT_CONSTEXPR20 auto write_float(OutputIt out, const DecimalFP& f,
-                                 const format_specs<Char>& specs,
-                                 float_specs fspecs, locale_ref loc)
-    -> OutputIt {
-  if (is_constant_evaluated()) {
-    return do_write_float<OutputIt, DecimalFP, Char,
-                          fallback_digit_grouping<Char>>(out, f, specs, fspecs,
-                                                         loc);
-  } else {
-    return do_write_float(out, f, specs, fspecs, loc);
-  }
-}
-
-template <typename T> constexpr auto isnan(T value) -> bool {
-  return !(value >= value);  // std::isnan doesn't support __float128.
-}
-
-template <typename T, typename Enable = void>
-struct has_isfinite : std::false_type {};
-
-template <typename T>
-struct has_isfinite<T, enable_if_t<sizeof(std::isfinite(T())) != 0>>
-    : std::true_type {};
-
-template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value&&
-                                        has_isfinite<T>::value)>
-FMT_CONSTEXPR20 auto isfinite(T value) -> bool {
-  constexpr T inf = T(std::numeric_limits<double>::infinity());
-  if (is_constant_evaluated())
-    return !detail::isnan(value) && value < inf && value > -inf;
-  return std::isfinite(value);
-}
-template <typename T, FMT_ENABLE_IF(!has_isfinite<T>::value)>
-FMT_CONSTEXPR auto isfinite(T value) -> bool {
-  T inf = T(std::numeric_limits<double>::infinity());
-  // std::isfinite doesn't support __float128.
-  return !detail::isnan(value) && value < inf && value > -inf;
-}
-
-template <typename T, FMT_ENABLE_IF(is_floating_point<T>::value)>
-FMT_INLINE FMT_CONSTEXPR bool signbit(T value) {
-  if (is_constant_evaluated()) {
-#ifdef __cpp_if_constexpr
-    if constexpr (std::numeric_limits<double>::is_iec559) {
-      auto bits = detail::bit_cast<uint64_t>(static_cast<double>(value));
-      return (bits >> (num_bits<uint64_t>() - 1)) != 0;
-    }
-#endif
-  }
-  return std::signbit(static_cast<double>(value));
-}
-
-inline FMT_CONSTEXPR20 void adjust_precision(int& precision, int exp10) {
-  // Adjust fixed precision by exponent because it is relative to decimal
-  // point.
-  if (exp10 > 0 && precision > max_value<int>() - exp10)
-    FMT_THROW(format_error("number is too big"));
-  precision += exp10;
-}
-
-class bigint {
- private:
-  // A bigint is stored as an array of bigits (big digits), with bigit at index
-  // 0 being the least significant one.
-  using bigit = uint32_t;
-  using double_bigit = uint64_t;
-  enum { bigits_capacity = 32 };
-  basic_memory_buffer<bigit, bigits_capacity> bigits_;
-  int exp_;
-
-  FMT_CONSTEXPR20 auto operator[](int index) const -> bigit {
-    return bigits_[to_unsigned(index)];
-  }
-  FMT_CONSTEXPR20 auto operator[](int index) -> bigit& {
-    return bigits_[to_unsigned(index)];
-  }
-
-  static constexpr const int bigit_bits = num_bits<bigit>();
-
-  friend struct formatter<bigint>;
-
-  FMT_CONSTEXPR20 void subtract_bigits(int index, bigit other, bigit& borrow) {
-    auto result = static_cast<double_bigit>((*this)[index]) - other - borrow;
-    (*this)[index] = static_cast<bigit>(result);
-    borrow = static_cast<bigit>(result >> (bigit_bits * 2 - 1));
-  }
-
-  FMT_CONSTEXPR20 void remove_leading_zeros() {
-    int num_bigits = static_cast<int>(bigits_.size()) - 1;
-    while (num_bigits > 0 && (*this)[num_bigits] == 0) --num_bigits;
-    bigits_.resize(to_unsigned(num_bigits + 1));
-  }
-
-  // Computes *this -= other assuming aligned bigints and *this >= other.
-  FMT_CONSTEXPR20 void subtract_aligned(const bigint& other) {
-    FMT_ASSERT(other.exp_ >= exp_, "unaligned bigints");
-    FMT_ASSERT(compare(*this, other) >= 0, "");
-    bigit borrow = 0;
-    int i = other.exp_ - exp_;
-    for (size_t j = 0, n = other.bigits_.size(); j != n; ++i, ++j)
-      subtract_bigits(i, other.bigits_[j], borrow);
-    while (borrow > 0) subtract_bigits(i, 0, borrow);
-    remove_leading_zeros();
-  }
-
-  FMT_CONSTEXPR20 void multiply(uint32_t value) {
-    const double_bigit wide_value = value;
-    bigit carry = 0;
-    for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
-      double_bigit result = bigits_[i] * wide_value + carry;
-      bigits_[i] = static_cast<bigit>(result);
-      carry = static_cast<bigit>(result >> bigit_bits);
-    }
-    if (carry != 0) bigits_.push_back(carry);
-  }
-
-  template <typename UInt, FMT_ENABLE_IF(std::is_same<UInt, uint64_t>::value ||
-                                         std::is_same<UInt, uint128_t>::value)>
-  FMT_CONSTEXPR20 void multiply(UInt value) {
-    using half_uint =
-        conditional_t<std::is_same<UInt, uint128_t>::value, uint64_t, uint32_t>;
-    const int shift = num_bits<half_uint>() - bigit_bits;
-    const UInt lower = static_cast<half_uint>(value);
-    const UInt upper = value >> num_bits<half_uint>();
-    UInt carry = 0;
-    for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
-      UInt result = lower * bigits_[i] + static_cast<bigit>(carry);
-      carry = (upper * bigits_[i] << shift) + (result >> bigit_bits) +
-              (carry >> bigit_bits);
-      bigits_[i] = static_cast<bigit>(result);
-    }
-    while (carry != 0) {
-      bigits_.push_back(static_cast<bigit>(carry));
-      carry >>= bigit_bits;
-    }
-  }
-
-  template <typename UInt, FMT_ENABLE_IF(std::is_same<UInt, uint64_t>::value ||
-                                         std::is_same<UInt, uint128_t>::value)>
-  FMT_CONSTEXPR20 void assign(UInt n) {
-    size_t num_bigits = 0;
-    do {
-      bigits_[num_bigits++] = static_cast<bigit>(n);
-      n >>= bigit_bits;
-    } while (n != 0);
-    bigits_.resize(num_bigits);
-    exp_ = 0;
-  }
-
- public:
-  FMT_CONSTEXPR20 bigint() : exp_(0) {}
-  explicit bigint(uint64_t n) { assign(n); }
-
-  bigint(const bigint&) = delete;
-  void operator=(const bigint&) = delete;
-
-  FMT_CONSTEXPR20 void assign(const bigint& other) {
-    auto size = other.bigits_.size();
-    bigits_.resize(size);
-    auto data = other.bigits_.data();
-    copy_str<bigit>(data, data + size, bigits_.data());
-    exp_ = other.exp_;
-  }
-
-  template <typename Int> FMT_CONSTEXPR20 void operator=(Int n) {
-    FMT_ASSERT(n > 0, "");
-    assign(uint64_or_128_t<Int>(n));
-  }
-
-  FMT_CONSTEXPR20 auto num_bigits() const -> int {
-    return static_cast<int>(bigits_.size()) + exp_;
-  }
-
-  FMT_NOINLINE FMT_CONSTEXPR20 auto operator<<=(int shift) -> bigint& {
-    FMT_ASSERT(shift >= 0, "");
-    exp_ += shift / bigit_bits;
-    shift %= bigit_bits;
-    if (shift == 0) return *this;
-    bigit carry = 0;
-    for (size_t i = 0, n = bigits_.size(); i < n; ++i) {
-      bigit c = bigits_[i] >> (bigit_bits - shift);
-      bigits_[i] = (bigits_[i] << shift) + carry;
-      carry = c;
-    }
-    if (carry != 0) bigits_.push_back(carry);
-    return *this;
-  }
-
-  template <typename Int>
-  FMT_CONSTEXPR20 auto operator*=(Int value) -> bigint& {
-    FMT_ASSERT(value > 0, "");
-    multiply(uint32_or_64_or_128_t<Int>(value));
-    return *this;
-  }
-
-  friend FMT_CONSTEXPR20 auto compare(const bigint& lhs, const bigint& rhs)
-      -> int {
-    int num_lhs_bigits = lhs.num_bigits(), num_rhs_bigits = rhs.num_bigits();
-    if (num_lhs_bigits != num_rhs_bigits)
-      return num_lhs_bigits > num_rhs_bigits ? 1 : -1;
-    int i = static_cast<int>(lhs.bigits_.size()) - 1;
-    int j = static_cast<int>(rhs.bigits_.size()) - 1;
-    int end = i - j;
-    if (end < 0) end = 0;
-    for (; i >= end; --i, --j) {
-      bigit lhs_bigit = lhs[i], rhs_bigit = rhs[j];
-      if (lhs_bigit != rhs_bigit) return lhs_bigit > rhs_bigit ? 1 : -1;
-    }
-    if (i != j) return i > j ? 1 : -1;
-    return 0;
-  }
-
-  // Returns compare(lhs1 + lhs2, rhs).
-  friend FMT_CONSTEXPR20 auto add_compare(const bigint& lhs1,
-                                          const bigint& lhs2, const bigint& rhs)
-      -> int {
-    auto minimum = [](int a, int b) { return a < b ? a : b; };
-    auto maximum = [](int a, int b) { return a > b ? a : b; };
-    int max_lhs_bigits = maximum(lhs1.num_bigits(), lhs2.num_bigits());
-    int num_rhs_bigits = rhs.num_bigits();
-    if (max_lhs_bigits + 1 < num_rhs_bigits) return -1;
-    if (max_lhs_bigits > num_rhs_bigits) return 1;
-    auto get_bigit = [](const bigint& n, int i) -> bigit {
-      return i >= n.exp_ && i < n.num_bigits() ? n[i - n.exp_] : 0;
-    };
-    double_bigit borrow = 0;
-    int min_exp = minimum(minimum(lhs1.exp_, lhs2.exp_), rhs.exp_);
-    for (int i = num_rhs_bigits - 1; i >= min_exp; --i) {
-      double_bigit sum =
-          static_cast<double_bigit>(get_bigit(lhs1, i)) + get_bigit(lhs2, i);
-      bigit rhs_bigit = get_bigit(rhs, i);
-      if (sum > rhs_bigit + borrow) return 1;
-      borrow = rhs_bigit + borrow - sum;
-      if (borrow > 1) return -1;
-      borrow <<= bigit_bits;
-    }
-    return borrow != 0 ? -1 : 0;
-  }
-
-  // Assigns pow(10, exp) to this bigint.
-  FMT_CONSTEXPR20 void assign_pow10(int exp) {
-    FMT_ASSERT(exp >= 0, "");
-    if (exp == 0) return *this = 1;
-    // Find the top bit.
-    int bitmask = 1;
-    while (exp >= bitmask) bitmask <<= 1;
-    bitmask >>= 1;
-    // pow(10, exp) = pow(5, exp) * pow(2, exp). First compute pow(5, exp) by
-    // repeated squaring and multiplication.
-    *this = 5;
-    bitmask >>= 1;
-    while (bitmask != 0) {
-      square();
-      if ((exp & bitmask) != 0) *this *= 5;
-      bitmask >>= 1;
-    }
-    *this <<= exp;  // Multiply by pow(2, exp) by shifting.
-  }
-
-  FMT_CONSTEXPR20 void square() {
-    int num_bigits = static_cast<int>(bigits_.size());
-    int num_result_bigits = 2 * num_bigits;
-    basic_memory_buffer<bigit, bigits_capacity> n(std::move(bigits_));
-    bigits_.resize(to_unsigned(num_result_bigits));
-    auto sum = uint128_t();
-    for (int bigit_index = 0; bigit_index < num_bigits; ++bigit_index) {
-      // Compute bigit at position bigit_index of the result by adding
-      // cross-product terms n[i] * n[j] such that i + j == bigit_index.
-      for (int i = 0, j = bigit_index; j >= 0; ++i, --j) {
-        // Most terms are multiplied twice which can be optimized in the future.
-        sum += static_cast<double_bigit>(n[i]) * n[j];
-      }
-      (*this)[bigit_index] = static_cast<bigit>(sum);
-      sum >>= num_bits<bigit>();  // Compute the carry.
-    }
-    // Do the same for the top half.
-    for (int bigit_index = num_bigits; bigit_index < num_result_bigits;
-         ++bigit_index) {
-      for (int j = num_bigits - 1, i = bigit_index - j; i < num_bigits;)
-        sum += static_cast<double_bigit>(n[i++]) * n[j--];
-      (*this)[bigit_index] = static_cast<bigit>(sum);
-      sum >>= num_bits<bigit>();
-    }
-    remove_leading_zeros();
-    exp_ *= 2;
-  }
-
-  // If this bigint has a bigger exponent than other, adds trailing zero to make
-  // exponents equal. This simplifies some operations such as subtraction.
-  FMT_CONSTEXPR20 void align(const bigint& other) {
-    int exp_difference = exp_ - other.exp_;
-    if (exp_difference <= 0) return;
-    int num_bigits = static_cast<int>(bigits_.size());
-    bigits_.resize(to_unsigned(num_bigits + exp_difference));
-    for (int i = num_bigits - 1, j = i + exp_difference; i >= 0; --i, --j)
-      bigits_[j] = bigits_[i];
-    std::uninitialized_fill_n(bigits_.data(), exp_difference, 0u);
-    exp_ -= exp_difference;
-  }
-
-  // Divides this bignum by divisor, assigning the remainder to this and
-  // returning the quotient.
-  FMT_CONSTEXPR20 auto divmod_assign(const bigint& divisor) -> int {
-    FMT_ASSERT(this != &divisor, "");
-    if (compare(*this, divisor) < 0) return 0;
-    FMT_ASSERT(divisor.bigits_[divisor.bigits_.size() - 1u] != 0, "");
-    align(divisor);
-    int quotient = 0;
-    do {
-      subtract_aligned(divisor);
-      ++quotient;
-    } while (compare(*this, divisor) >= 0);
-    return quotient;
-  }
-};
-
-// format_dragon flags.
-enum dragon {
-  predecessor_closer = 1,
-  fixup = 2,  // Run fixup to correct exp10 which can be off by one.
-  fixed = 4,
-};
-
-// Formats a floating-point number using a variation of the Fixed-Precision
-// Positive Floating-Point Printout ((FPP)^2) algorithm by Steele & White:
-// https://fmt.dev/papers/p372-steele.pdf.
-FMT_CONSTEXPR20 inline void format_dragon(basic_fp<uint128_t> value,
-                                          unsigned flags, int num_digits,
-                                          buffer<char>& buf, int& exp10) {
-  bigint numerator;    // 2 * R in (FPP)^2.
-  bigint denominator;  // 2 * S in (FPP)^2.
-  // lower and upper are differences between value and corresponding boundaries.
-  bigint lower;             // (M^- in (FPP)^2).
-  bigint upper_store;       // upper's value if different from lower.
-  bigint* upper = nullptr;  // (M^+ in (FPP)^2).
-  // Shift numerator and denominator by an extra bit or two (if lower boundary
-  // is closer) to make lower and upper integers. This eliminates multiplication
-  // by 2 during later computations.
-  bool is_predecessor_closer = (flags & dragon::predecessor_closer) != 0;
-  int shift = is_predecessor_closer ? 2 : 1;
-  if (value.e >= 0) {
-    numerator = value.f;
-    numerator <<= value.e + shift;
-    lower = 1;
-    lower <<= value.e;
-    if (is_predecessor_closer) {
-      upper_store = 1;
-      upper_store <<= value.e + 1;
-      upper = &upper_store;
-    }
-    denominator.assign_pow10(exp10);
-    denominator <<= shift;
-  } else if (exp10 < 0) {
-    numerator.assign_pow10(-exp10);
-    lower.assign(numerator);
-    if (is_predecessor_closer) {
-      upper_store.assign(numerator);
-      upper_store <<= 1;
-      upper = &upper_store;
-    }
-    numerator *= value.f;
-    numerator <<= shift;
-    denominator = 1;
-    denominator <<= shift - value.e;
-  } else {
-    numerator = value.f;
-    numerator <<= shift;
-    denominator.assign_pow10(exp10);
-    denominator <<= shift - value.e;
-    lower = 1;
-    if (is_predecessor_closer) {
-      upper_store = 1ULL << 1;
-      upper = &upper_store;
-    }
-  }
-  int even = static_cast<int>((value.f & 1) == 0);
-  if (!upper) upper = &lower;
-  bool shortest = num_digits < 0;
-  if ((flags & dragon::fixup) != 0) {
-    if (add_compare(numerator, *upper, denominator) + even <= 0) {
-      --exp10;
-      numerator *= 10;
-      if (num_digits < 0) {
-        lower *= 10;
-        if (upper != &lower) *upper *= 10;
-      }
-    }
-    if ((flags & dragon::fixed) != 0) adjust_precision(num_digits, exp10 + 1);
-  }
-  // Invariant: value == (numerator / denominator) * pow(10, exp10).
-  if (shortest) {
-    // Generate the shortest representation.
-    num_digits = 0;
-    char* data = buf.data();
-    for (;;) {
-      int digit = numerator.divmod_assign(denominator);
-      bool low = compare(numerator, lower) - even < 0;  // numerator <[=] lower.
-      // numerator + upper >[=] pow10:
-      bool high = add_compare(numerator, *upper, denominator) + even > 0;
-      data[num_digits++] = static_cast<char>('0' + digit);
-      if (low || high) {
-        if (!low) {
-          ++data[num_digits - 1];
-        } else if (high) {
-          int result = add_compare(numerator, numerator, denominator);
-          // Round half to even.
-          if (result > 0 || (result == 0 && (digit % 2) != 0))
-            ++data[num_digits - 1];
-        }
-        buf.try_resize(to_unsigned(num_digits));
-        exp10 -= num_digits - 1;
-        return;
-      }
-      numerator *= 10;
-      lower *= 10;
-      if (upper != &lower) *upper *= 10;
-    }
-  }
-  // Generate the given number of digits.
-  exp10 -= num_digits - 1;
-  if (num_digits <= 0) {
-    denominator *= 10;
-    auto digit = add_compare(numerator, numerator, denominator) > 0 ? '1' : '0';
-    buf.push_back(digit);
-    return;
-  }
-  buf.try_resize(to_unsigned(num_digits));
-  for (int i = 0; i < num_digits - 1; ++i) {
-    int digit = numerator.divmod_assign(denominator);
-    buf[i] = static_cast<char>('0' + digit);
-    numerator *= 10;
-  }
-  int digit = numerator.divmod_assign(denominator);
-  auto result = add_compare(numerator, numerator, denominator);
-  if (result > 0 || (result == 0 && (digit % 2) != 0)) {
-    if (digit == 9) {
-      const auto overflow = '0' + 10;
-      buf[num_digits - 1] = overflow;
-      // Propagate the carry.
-      for (int i = num_digits - 1; i > 0 && buf[i] == overflow; --i) {
-        buf[i] = '0';
-        ++buf[i - 1];
-      }
-      if (buf[0] == overflow) {
-        buf[0] = '1';
-        if ((flags & dragon::fixed) != 0)
-          buf.push_back('0');
-        else
-          ++exp10;
-      }
-      return;
-    }
-    ++digit;
-  }
-  buf[num_digits - 1] = static_cast<char>('0' + digit);
-}
-
-// Formats a floating-point number using the hexfloat format.
-template <typename Float, FMT_ENABLE_IF(!is_double_double<Float>::value)>
-FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision,
-                                     float_specs specs, buffer<char>& buf) {
-  // float is passed as double to reduce the number of instantiations and to
-  // simplify implementation.
-  static_assert(!std::is_same<Float, float>::value, "");
-
-  using info = dragonbox::float_info<Float>;
-
-  // Assume Float is in the format [sign][exponent][significand].
-  using carrier_uint = typename info::carrier_uint;
-
-  constexpr auto num_float_significand_bits =
-      detail::num_significand_bits<Float>();
-
-  basic_fp<carrier_uint> f(value);
-  f.e += num_float_significand_bits;
-  if (!has_implicit_bit<Float>()) --f.e;
-
-  constexpr auto num_fraction_bits =
-      num_float_significand_bits + (has_implicit_bit<Float>() ? 1 : 0);
-  constexpr auto num_xdigits = (num_fraction_bits + 3) / 4;
-
-  constexpr auto leading_shift = ((num_xdigits - 1) * 4);
-  const auto leading_mask = carrier_uint(0xF) << leading_shift;
-  const auto leading_xdigit =
-      static_cast<uint32_t>((f.f & leading_mask) >> leading_shift);
-  if (leading_xdigit > 1) f.e -= (32 - countl_zero(leading_xdigit) - 1);
-
-  int print_xdigits = num_xdigits - 1;
-  if (precision >= 0 && print_xdigits > precision) {
-    const int shift = ((print_xdigits - precision - 1) * 4);
-    const auto mask = carrier_uint(0xF) << shift;
-    const auto v = static_cast<uint32_t>((f.f & mask) >> shift);
-
-    if (v >= 8) {
-      const auto inc = carrier_uint(1) << (shift + 4);
-      f.f += inc;
-      f.f &= ~(inc - 1);
-    }
-
-    // Check long double overflow
-    if (!has_implicit_bit<Float>()) {
-      const auto implicit_bit = carrier_uint(1) << num_float_significand_bits;
-      if ((f.f & implicit_bit) == implicit_bit) {
-        f.f >>= 4;
-        f.e += 4;
-      }
-    }
-
-    print_xdigits = precision;
-  }
-
-  char xdigits[num_bits<carrier_uint>() / 4];
-  detail::fill_n(xdigits, sizeof(xdigits), '0');
-  format_uint<4>(xdigits, f.f, num_xdigits, specs.upper);
-
-  // Remove zero tail
-  while (print_xdigits > 0 && xdigits[print_xdigits] == '0') --print_xdigits;
-
-  buf.push_back('0');
-  buf.push_back(specs.upper ? 'X' : 'x');
-  buf.push_back(xdigits[0]);
-  if (specs.showpoint || print_xdigits > 0 || print_xdigits < precision)
-    buf.push_back('.');
-  buf.append(xdigits + 1, xdigits + 1 + print_xdigits);
-  for (; print_xdigits < precision; ++print_xdigits) buf.push_back('0');
-
-  buf.push_back(specs.upper ? 'P' : 'p');
-
-  uint32_t abs_e;
-  if (f.e < 0) {
-    buf.push_back('-');
-    abs_e = static_cast<uint32_t>(-f.e);
-  } else {
-    buf.push_back('+');
-    abs_e = static_cast<uint32_t>(f.e);
-  }
-  format_decimal<char>(appender(buf), abs_e, detail::count_digits(abs_e));
-}
-
-template <typename Float, FMT_ENABLE_IF(is_double_double<Float>::value)>
-FMT_CONSTEXPR20 void format_hexfloat(Float value, int precision,
-                                     float_specs specs, buffer<char>& buf) {
-  format_hexfloat(static_cast<double>(value), precision, specs, buf);
-}
-
-constexpr auto fractional_part_rounding_thresholds(int index) -> uint32_t {
-  // For checking rounding thresholds.
-  // The kth entry is chosen to be the smallest integer such that the
-  // upper 32-bits of 10^(k+1) times it is strictly bigger than 5 * 10^k.
-  // It is equal to ceil(2^31 + 2^32/10^(k + 1)).
-  // These are stored in a string literal because we cannot have static arrays
-  // in constexpr functions and non-static ones are poorly optimized.
-  return U"\x9999999a\x828f5c29\x80418938\x80068db9\x8000a7c6\x800010c7"
-         U"\x800001ae\x8000002b"[index];
-}
-
-template <typename Float>
-FMT_CONSTEXPR20 auto format_float(Float value, int precision, float_specs specs,
-                                  buffer<char>& buf) -> int {
-  // float is passed as double to reduce the number of instantiations.
-  static_assert(!std::is_same<Float, float>::value, "");
-  FMT_ASSERT(value >= 0, "value is negative");
-  auto converted_value = convert_float(value);
-
-  const bool fixed = specs.format == float_format::fixed;
-  if (value <= 0) {  // <= instead of == to silence a warning.
-    if (precision <= 0 || !fixed) {
-      buf.push_back('0');
-      return 0;
-    }
-    buf.try_resize(to_unsigned(precision));
-    fill_n(buf.data(), precision, '0');
-    return -precision;
-  }
-
-  int exp = 0;
-  bool use_dragon = true;
-  unsigned dragon_flags = 0;
-  if (!is_fast_float<Float>() || is_constant_evaluated()) {
-    const auto inv_log2_10 = 0.3010299956639812;  // 1 / log2(10)
-    using info = dragonbox::float_info<decltype(converted_value)>;
-    const auto f = basic_fp<typename info::carrier_uint>(converted_value);
-    // Compute exp, an approximate power of 10, such that
-    //   10^(exp - 1) <= value < 10^exp or 10^exp <= value < 10^(exp + 1).
-    // This is based on log10(value) == log2(value) / log2(10) and approximation
-    // of log2(value) by e + num_fraction_bits idea from double-conversion.
-    auto e = (f.e + count_digits<1>(f.f) - 1) * inv_log2_10 - 1e-10;
-    exp = static_cast<int>(e);
-    if (e > exp) ++exp;  // Compute ceil.
-    dragon_flags = dragon::fixup;
-  } else if (precision < 0) {
-    // Use Dragonbox for the shortest format.
-    if (specs.binary32) {
-      auto dec = dragonbox::to_decimal(static_cast<float>(value));
-      write<char>(buffer_appender<char>(buf), dec.significand);
-      return dec.exponent;
-    }
-    auto dec = dragonbox::to_decimal(static_cast<double>(value));
-    write<char>(buffer_appender<char>(buf), dec.significand);
-    return dec.exponent;
-  } else {
-    // Extract significand bits and exponent bits.
-    using info = dragonbox::float_info<double>;
-    auto br = bit_cast<uint64_t>(static_cast<double>(value));
-
-    const uint64_t significand_mask =
-        (static_cast<uint64_t>(1) << num_significand_bits<double>()) - 1;
-    uint64_t significand = (br & significand_mask);
-    int exponent = static_cast<int>((br & exponent_mask<double>()) >>
-                                    num_significand_bits<double>());
-
-    if (exponent != 0) {  // Check if normal.
-      exponent -= exponent_bias<double>() + num_significand_bits<double>();
-      significand |=
-          (static_cast<uint64_t>(1) << num_significand_bits<double>());
-      significand <<= 1;
-    } else {
-      // Normalize subnormal inputs.
-      FMT_ASSERT(significand != 0, "zeros should not appear here");
-      int shift = countl_zero(significand);
-      FMT_ASSERT(shift >= num_bits<uint64_t>() - num_significand_bits<double>(),
-                 "");
-      shift -= (num_bits<uint64_t>() - num_significand_bits<double>() - 2);
-      exponent = (std::numeric_limits<double>::min_exponent -
-                  num_significand_bits<double>()) -
-                 shift;
-      significand <<= shift;
-    }
-
-    // Compute the first several nonzero decimal significand digits.
-    // We call the number we get the first segment.
-    const int k = info::kappa - dragonbox::floor_log10_pow2(exponent);
-    exp = -k;
-    const int beta = exponent + dragonbox::floor_log2_pow10(k);
-    uint64_t first_segment;
-    bool has_more_segments;
-    int digits_in_the_first_segment;
-    {
-      const auto r = dragonbox::umul192_upper128(
-          significand << beta, dragonbox::get_cached_power(k));
-      first_segment = r.high();
-      has_more_segments = r.low() != 0;
-
-      // The first segment can have 18 ~ 19 digits.
-      if (first_segment >= 1000000000000000000ULL) {
-        digits_in_the_first_segment = 19;
-      } else {
-        // When it is of 18-digits, we align it to 19-digits by adding a bogus
-        // zero at the end.
-        digits_in_the_first_segment = 18;
-        first_segment *= 10;
-      }
-    }
-
-    // Compute the actual number of decimal digits to print.
-    if (fixed) adjust_precision(precision, exp + digits_in_the_first_segment);
-
-    // Use Dragon4 only when there might be not enough digits in the first
-    // segment.
-    if (digits_in_the_first_segment > precision) {
-      use_dragon = false;
-
-      if (precision <= 0) {
-        exp += digits_in_the_first_segment;
-
-        if (precision < 0) {
-          // Nothing to do, since all we have are just leading zeros.
-          buf.try_resize(0);
-        } else {
-          // We may need to round-up.
-          buf.try_resize(1);
-          if ((first_segment | static_cast<uint64_t>(has_more_segments)) >
-              5000000000000000000ULL) {
-            buf[0] = '1';
-          } else {
-            buf[0] = '0';
-          }
-        }
-      }  // precision <= 0
-      else {
-        exp += digits_in_the_first_segment - precision;
-
-        // When precision > 0, we divide the first segment into three
-        // subsegments, each with 9, 9, and 0 ~ 1 digits so that each fits
-        // in 32-bits which usually allows faster calculation than in
-        // 64-bits. Since some compiler (e.g. MSVC) doesn't know how to optimize
-        // division-by-constant for large 64-bit divisors, we do it here
-        // manually. The magic number 7922816251426433760 below is equal to
-        // ceil(2^(64+32) / 10^10).
-        const uint32_t first_subsegment = static_cast<uint32_t>(
-            dragonbox::umul128_upper64(first_segment, 7922816251426433760ULL) >>
-            32);
-        const uint64_t second_third_subsegments =
-            first_segment - first_subsegment * 10000000000ULL;
-
-        uint64_t prod;
-        uint32_t digits;
-        bool should_round_up;
-        int number_of_digits_to_print = precision > 9 ? 9 : precision;
-
-        // Print a 9-digits subsegment, either the first or the second.
-        auto print_subsegment = [&](uint32_t subsegment, char* buffer) {
-          int number_of_digits_printed = 0;
-
-          // If we want to print an odd number of digits from the subsegment,
-          if ((number_of_digits_to_print & 1) != 0) {
-            // Convert to 64-bit fixed-point fractional form with 1-digit
-            // integer part. The magic number 720575941 is a good enough
-            // approximation of 2^(32 + 24) / 10^8; see
-            // https://jk-jeon.github.io/posts/2022/12/fixed-precision-formatting/#fixed-length-case
-            // for details.
-            prod = ((subsegment * static_cast<uint64_t>(720575941)) >> 24) + 1;
-            digits = static_cast<uint32_t>(prod >> 32);
-            *buffer = static_cast<char>('0' + digits);
-            number_of_digits_printed++;
-          }
-          // If we want to print an even number of digits from the
-          // first_subsegment,
-          else {
-            // Convert to 64-bit fixed-point fractional form with 2-digits
-            // integer part. The magic number 450359963 is a good enough
-            // approximation of 2^(32 + 20) / 10^7; see
-            // https://jk-jeon.github.io/posts/2022/12/fixed-precision-formatting/#fixed-length-case
-            // for details.
-            prod = ((subsegment * static_cast<uint64_t>(450359963)) >> 20) + 1;
-            digits = static_cast<uint32_t>(prod >> 32);
-            copy2(buffer, digits2(digits));
-            number_of_digits_printed += 2;
-          }
-
-          // Print all digit pairs.
-          while (number_of_digits_printed < number_of_digits_to_print) {
-            prod = static_cast<uint32_t>(prod) * static_cast<uint64_t>(100);
-            digits = static_cast<uint32_t>(prod >> 32);
-            copy2(buffer + number_of_digits_printed, digits2(digits));
-            number_of_digits_printed += 2;
-          }
-        };
-
-        // Print first subsegment.
-        print_subsegment(first_subsegment, buf.data());
-
-        // Perform rounding if the first subsegment is the last subsegment to
-        // print.
-        if (precision <= 9) {
-          // Rounding inside the subsegment.
-          // We round-up if:
-          //  - either the fractional part is strictly larger than 1/2, or
-          //  - the fractional part is exactly 1/2 and the last digit is odd.
-          // We rely on the following observations:
-          //  - If fractional_part >= threshold, then the fractional part is
-          //    strictly larger than 1/2.
-          //  - If the MSB of fractional_part is set, then the fractional part
-          //    must be at least 1/2.
-          //  - When the MSB of fractional_part is set, either
-          //    second_third_subsegments being nonzero or has_more_segments
-          //    being true means there are further digits not printed, so the
-          //    fractional part is strictly larger than 1/2.
-          if (precision < 9) {
-            uint32_t fractional_part = static_cast<uint32_t>(prod);
-            should_round_up =
-                fractional_part >= fractional_part_rounding_thresholds(
-                                       8 - number_of_digits_to_print) ||
-                ((fractional_part >> 31) &
-                 ((digits & 1) | (second_third_subsegments != 0) |
-                  has_more_segments)) != 0;
-          }
-          // Rounding at the subsegment boundary.
-          // In this case, the fractional part is at least 1/2 if and only if
-          // second_third_subsegments >= 5000000000ULL, and is strictly larger
-          // than 1/2 if we further have either second_third_subsegments >
-          // 5000000000ULL or has_more_segments == true.
-          else {
-            should_round_up = second_third_subsegments > 5000000000ULL ||
-                              (second_third_subsegments == 5000000000ULL &&
-                               ((digits & 1) != 0 || has_more_segments));
-          }
-        }
-        // Otherwise, print the second subsegment.
-        else {
-          // Compilers are not aware of how to leverage the maximum value of
-          // second_third_subsegments to find out a better magic number which
-          // allows us to eliminate an additional shift. 1844674407370955162 =
-          // ceil(2^64/10) < ceil(2^64*(10^9/(10^10 - 1))).
-          const uint32_t second_subsegment =
-              static_cast<uint32_t>(dragonbox::umul128_upper64(
-                  second_third_subsegments, 1844674407370955162ULL));
-          const uint32_t third_subsegment =
-              static_cast<uint32_t>(second_third_subsegments) -
-              second_subsegment * 10;
-
-          number_of_digits_to_print = precision - 9;
-          print_subsegment(second_subsegment, buf.data() + 9);
-
-          // Rounding inside the subsegment.
-          if (precision < 18) {
-            // The condition third_subsegment != 0 implies that the segment was
-            // of 19 digits, so in this case the third segment should be
-            // consisting of a genuine digit from the input.
-            uint32_t fractional_part = static_cast<uint32_t>(prod);
-            should_round_up =
-                fractional_part >= fractional_part_rounding_thresholds(
-                                       8 - number_of_digits_to_print) ||
-                ((fractional_part >> 31) &
-                 ((digits & 1) | (third_subsegment != 0) |
-                  has_more_segments)) != 0;
-          }
-          // Rounding at the subsegment boundary.
-          else {
-            // In this case, the segment must be of 19 digits, thus
-            // the third subsegment should be consisting of a genuine digit from
-            // the input.
-            should_round_up = third_subsegment > 5 ||
-                              (third_subsegment == 5 &&
-                               ((digits & 1) != 0 || has_more_segments));
-          }
-        }
-
-        // Round-up if necessary.
-        if (should_round_up) {
-          ++buf[precision - 1];
-          for (int i = precision - 1; i > 0 && buf[i] > '9'; --i) {
-            buf[i] = '0';
-            ++buf[i - 1];
-          }
-          if (buf[0] > '9') {
-            buf[0] = '1';
-            if (fixed)
-              buf[precision++] = '0';
-            else
-              ++exp;
-          }
-        }
-        buf.try_resize(to_unsigned(precision));
-      }
-    }  // if (digits_in_the_first_segment > precision)
-    else {
-      // Adjust the exponent for its use in Dragon4.
-      exp += digits_in_the_first_segment - 1;
-    }
-  }
-  if (use_dragon) {
-    auto f = basic_fp<uint128_t>();
-    bool is_predecessor_closer = specs.binary32
-                                     ? f.assign(static_cast<float>(value))
-                                     : f.assign(converted_value);
-    if (is_predecessor_closer) dragon_flags |= dragon::predecessor_closer;
-    if (fixed) dragon_flags |= dragon::fixed;
-    // Limit precision to the maximum possible number of significant digits in
-    // an IEEE754 double because we don't need to generate zeros.
-    const int max_double_digits = 767;
-    if (precision > max_double_digits) precision = max_double_digits;
-    format_dragon(f, dragon_flags, precision, buf, exp);
-  }
-  if (!fixed && !specs.showpoint) {
-    // Remove trailing zeros.
-    auto num_digits = buf.size();
-    while (num_digits > 0 && buf[num_digits - 1] == '0') {
-      --num_digits;
-      ++exp;
-    }
-    buf.try_resize(num_digits);
-  }
-  return exp;
-}
-template <typename Char, typename OutputIt, typename T>
-FMT_CONSTEXPR20 auto write_float(OutputIt out, T value,
-                                 format_specs<Char> specs, locale_ref loc)
-    -> OutputIt {
-  float_specs fspecs = parse_float_type_spec(specs);
-  fspecs.sign = specs.sign;
-  if (detail::signbit(value)) {  // value < 0 is false for NaN so use signbit.
-    fspecs.sign = sign::minus;
-    value = -value;
-  } else if (fspecs.sign == sign::minus) {
-    fspecs.sign = sign::none;
-  }
-
-  if (!detail::isfinite(value))
-    return write_nonfinite(out, detail::isnan(value), specs, fspecs);
-
-  if (specs.align == align::numeric && fspecs.sign) {
-    auto it = reserve(out, 1);
-    *it++ = detail::sign<Char>(fspecs.sign);
-    out = base_iterator(out, it);
-    fspecs.sign = sign::none;
-    if (specs.width != 0) --specs.width;
-  }
-
-  memory_buffer buffer;
-  if (fspecs.format == float_format::hex) {
-    if (fspecs.sign) buffer.push_back(detail::sign<char>(fspecs.sign));
-    format_hexfloat(convert_float(value), specs.precision, fspecs, buffer);
-    return write_bytes<align::right>(out, {buffer.data(), buffer.size()},
-                                     specs);
-  }
-  int precision = specs.precision >= 0 || specs.type == presentation_type::none
-                      ? specs.precision
-                      : 6;
-  if (fspecs.format == float_format::exp) {
-    if (precision == max_value<int>())
-      throw_format_error("number is too big");
-    else
-      ++precision;
-  } else if (fspecs.format != float_format::fixed && precision == 0) {
-    precision = 1;
-  }
-  if (const_check(std::is_same<T, float>())) fspecs.binary32 = true;
-  int exp = format_float(convert_float(value), precision, fspecs, buffer);
-  fspecs.precision = precision;
-  auto f = big_decimal_fp{buffer.data(), static_cast<int>(buffer.size()), exp};
-  return write_float(out, f, specs, fspecs, loc);
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_floating_point<T>::value)>
-FMT_CONSTEXPR20 auto write(OutputIt out, T value, format_specs<Char> specs,
-                           locale_ref loc = {}) -> OutputIt {
-  if (const_check(!is_supported_floating_point(value))) return out;
-  return specs.localized && write_loc(out, value, specs, loc)
-             ? out
-             : write_float(out, value, specs, loc);
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_fast_float<T>::value)>
-FMT_CONSTEXPR20 auto write(OutputIt out, T value) -> OutputIt {
-  if (is_constant_evaluated()) return write(out, value, format_specs<Char>());
-  if (const_check(!is_supported_floating_point(value))) return out;
-
-  auto fspecs = float_specs();
-  if (detail::signbit(value)) {
-    fspecs.sign = sign::minus;
-    value = -value;
-  }
-
-  constexpr auto specs = format_specs<Char>();
-  using floaty = conditional_t<std::is_same<T, long double>::value, double, T>;
-  using floaty_uint = typename dragonbox::float_info<floaty>::carrier_uint;
-  floaty_uint mask = exponent_mask<floaty>();
-  if ((bit_cast<floaty_uint>(value) & mask) == mask)
-    return write_nonfinite(out, std::isnan(value), specs, fspecs);
-
-  auto dec = dragonbox::to_decimal(static_cast<floaty>(value));
-  return write_float(out, dec, specs, fspecs, {});
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_floating_point<T>::value &&
-                        !is_fast_float<T>::value)>
-inline auto write(OutputIt out, T value) -> OutputIt {
-  return write(out, value, format_specs<Char>());
-}
-
-template <typename Char, typename OutputIt>
-auto write(OutputIt out, monostate, format_specs<Char> = {}, locale_ref = {})
-    -> OutputIt {
-  FMT_ASSERT(false, "");
-  return out;
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, basic_string_view<Char> value)
-    -> OutputIt {
-  auto it = reserve(out, value.size());
-  it = copy_str_noinline<Char>(value.begin(), value.end(), it);
-  return base_iterator(out, it);
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(is_string<T>::value)>
-constexpr auto write(OutputIt out, const T& value) -> OutputIt {
-  return write<Char>(out, to_string_view(value));
-}
-
-// FMT_ENABLE_IF() condition separated to workaround an MSVC bug.
-template <
-    typename Char, typename OutputIt, typename T,
-    bool check =
-        std::is_enum<T>::value && !std::is_same<T, Char>::value &&
-        mapped_type_constant<T, basic_format_context<OutputIt, Char>>::value !=
-            type::custom_type,
-    FMT_ENABLE_IF(check)>
-FMT_CONSTEXPR auto write(OutputIt out, T value) -> OutputIt {
-  return write<Char>(out, static_cast<underlying_t<T>>(value));
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(std::is_same<T, bool>::value)>
-FMT_CONSTEXPR auto write(OutputIt out, T value,
-                         const format_specs<Char>& specs = {}, locale_ref = {})
-    -> OutputIt {
-  return specs.type != presentation_type::none &&
-                 specs.type != presentation_type::string
-             ? write(out, value ? 1 : 0, specs, {})
-             : write_bytes(out, value ? "true" : "false", specs);
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR auto write(OutputIt out, Char value) -> OutputIt {
-  auto it = reserve(out, 1);
-  *it++ = value;
-  return base_iterator(out, it);
-}
-
-template <typename Char, typename OutputIt>
-FMT_CONSTEXPR_CHAR_TRAITS auto write(OutputIt out, const Char* value)
-    -> OutputIt {
-  if (value) return write(out, basic_string_view<Char>(value));
-  throw_format_error("string pointer is null");
-  return out;
-}
-
-template <typename Char, typename OutputIt, typename T,
-          FMT_ENABLE_IF(std::is_same<T, void>::value)>
-auto write(OutputIt out, const T* value, const format_specs<Char>& specs = {},
-           locale_ref = {}) -> OutputIt {
-  return write_ptr<Char>(out, bit_cast<uintptr_t>(value), &specs);
-}
-
-// A write overload that handles implicit conversions.
-template <typename Char, typename OutputIt, typename T,
-          typename Context = basic_format_context<OutputIt, Char>>
-FMT_CONSTEXPR auto write(OutputIt out, const T& value) -> enable_if_t<
-    std::is_class<T>::value && !is_string<T>::value &&
-        !is_floating_point<T>::value && !std::is_same<T, Char>::value &&
-        !std::is_same<T, remove_cvref_t<decltype(arg_mapper<Context>().map(
-                             value))>>::value,
-    OutputIt> {
-  return write<Char>(out, arg_mapper<Context>().map(value));
-}
-
-template <typename Char, typename OutputIt, typename T,
-          typename Context = basic_format_context<OutputIt, Char>>
-FMT_CONSTEXPR auto write(OutputIt out, const T& value)
-    -> enable_if_t<mapped_type_constant<T, Context>::value == type::custom_type,
-                   OutputIt> {
-  auto formatter = typename Context::template formatter_type<T>();
-  auto parse_ctx = typename Context::parse_context_type({});
-  formatter.parse(parse_ctx);
-  auto ctx = Context(out, {}, {});
-  return formatter.format(value, ctx);
-}
-
-// An argument visitor that formats the argument and writes it via the output
-// iterator. It's a class and not a generic lambda for compatibility with C++11.
-template <typename Char> struct default_arg_formatter {
-  using iterator = buffer_appender<Char>;
-  using context = buffer_context<Char>;
-
-  iterator out;
-  basic_format_args<context> args;
-  locale_ref loc;
-
-  template <typename T> auto operator()(T value) -> iterator {
-    return write<Char>(out, value);
-  }
-  auto operator()(typename basic_format_arg<context>::handle h) -> iterator {
-    basic_format_parse_context<Char> parse_ctx({});
-    context format_ctx(out, args, loc);
-    h.format(parse_ctx, format_ctx);
-    return format_ctx.out();
-  }
-};
-
-template <typename Char> struct arg_formatter {
-  using iterator = buffer_appender<Char>;
-  using context = buffer_context<Char>;
-
-  iterator out;
-  const format_specs<Char>& specs;
-  locale_ref locale;
-
-  template <typename T>
-  FMT_CONSTEXPR FMT_INLINE auto operator()(T value) -> iterator {
-    return detail::write(out, value, specs, locale);
-  }
-  auto operator()(typename basic_format_arg<context>::handle) -> iterator {
-    // User-defined types are handled separately because they require access
-    // to the parse context.
-    return out;
-  }
-};
-
-struct width_checker {
-  template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
-  FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
-    if (is_negative(value)) throw_format_error("negative width");
-    return static_cast<unsigned long long>(value);
-  }
-
-  template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
-  FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
-    throw_format_error("width is not integer");
-    return 0;
-  }
-};
-
-struct precision_checker {
-  template <typename T, FMT_ENABLE_IF(is_integer<T>::value)>
-  FMT_CONSTEXPR auto operator()(T value) -> unsigned long long {
-    if (is_negative(value)) throw_format_error("negative precision");
-    return static_cast<unsigned long long>(value);
-  }
-
-  template <typename T, FMT_ENABLE_IF(!is_integer<T>::value)>
-  FMT_CONSTEXPR auto operator()(T) -> unsigned long long {
-    throw_format_error("precision is not integer");
-    return 0;
-  }
-};
-
-template <typename Handler, typename FormatArg>
-FMT_CONSTEXPR auto get_dynamic_spec(FormatArg arg) -> int {
-  unsigned long long value = visit_format_arg(Handler(), arg);
-  if (value > to_unsigned(max_value<int>()))
-    throw_format_error("number is too big");
-  return static_cast<int>(value);
-}
-
-template <typename Context, typename ID>
-FMT_CONSTEXPR auto get_arg(Context& ctx, ID id) -> decltype(ctx.arg(id)) {
-  auto arg = ctx.arg(id);
-  if (!arg) ctx.on_error("argument not found");
-  return arg;
-}
-
-template <typename Handler, typename Context>
-FMT_CONSTEXPR void handle_dynamic_spec(int& value,
-                                       arg_ref<typename Context::char_type> ref,
-                                       Context& ctx) {
-  switch (ref.kind) {
-  case arg_id_kind::none:
-    break;
-  case arg_id_kind::index:
-    value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.index));
-    break;
-  case arg_id_kind::name:
-    value = detail::get_dynamic_spec<Handler>(get_arg(ctx, ref.val.name));
-    break;
-  }
-}
-
-#if FMT_USE_USER_DEFINED_LITERALS
-#  if FMT_USE_NONTYPE_TEMPLATE_ARGS
-template <typename T, typename Char, size_t N,
-          fmt::detail_exported::fixed_string<Char, N> Str>
-struct statically_named_arg : view {
-  static constexpr auto name = Str.data;
-
-  const T& value;
-  statically_named_arg(const T& v) : value(v) {}
-};
-
-template <typename T, typename Char, size_t N,
-          fmt::detail_exported::fixed_string<Char, N> Str>
-struct is_named_arg<statically_named_arg<T, Char, N, Str>> : std::true_type {};
-
-template <typename T, typename Char, size_t N,
-          fmt::detail_exported::fixed_string<Char, N> Str>
-struct is_statically_named_arg<statically_named_arg<T, Char, N, Str>>
-    : std::true_type {};
-
-template <typename Char, size_t N,
-          fmt::detail_exported::fixed_string<Char, N> Str>
-struct udl_arg {
-  template <typename T> auto operator=(T&& value) const {
-    return statically_named_arg<T, Char, N, Str>(std::forward<T>(value));
-  }
-};
-#  else
-template <typename Char> struct udl_arg {
-  const Char* str;
-
-  template <typename T> auto operator=(T&& value) const -> named_arg<Char, T> {
-    return {str, std::forward<T>(value)};
-  }
-};
-#  endif
-#endif  // FMT_USE_USER_DEFINED_LITERALS
-
-template <typename Locale, typename Char>
-auto vformat(const Locale& loc, basic_string_view<Char> fmt,
-             basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> std::basic_string<Char> {
-  auto buf = basic_memory_buffer<Char>();
-  detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
-  return {buf.data(), buf.size()};
-}
-
-using format_func = void (*)(detail::buffer<char>&, int, const char*);
-
-FMT_API void format_error_code(buffer<char>& out, int error_code,
-                               string_view message) noexcept;
-
-FMT_API void report_error(format_func func, int error_code,
-                          const char* message) noexcept;
-}  // namespace detail
-
-FMT_API auto vsystem_error(int error_code, string_view format_str,
-                           format_args args) -> std::system_error;
-
-/**
-  \rst
-  Constructs :class:`std::system_error` with a message formatted with
-  ``fmt::format(fmt, args...)``.
-  *error_code* is a system error code as given by ``errno``.
-
-  **Example**::
-
-    // This throws std::system_error with the description
-    //   cannot open file 'madeup': No such file or directory
-    // or similar (system message may vary).
-    const char* filename = "madeup";
-    std::FILE* file = std::fopen(filename, "r");
-    if (!file)
-      throw fmt::system_error(errno, "cannot open file '{}'", filename);
-  \endrst
- */
-template <typename... T>
-auto system_error(int error_code, format_string<T...> fmt, T&&... args)
-    -> std::system_error {
-  return vsystem_error(error_code, fmt, fmt::make_format_args(args...));
-}
-
-/**
-  \rst
-  Formats an error message for an error returned by an operating system or a
-  language runtime, for example a file opening error, and writes it to *out*.
-  The format is the same as the one used by ``std::system_error(ec, message)``
-  where ``ec`` is ``std::error_code(error_code, std::generic_category()})``.
-  It is implementation-defined but normally looks like:
-
-  .. parsed-literal::
-     *<message>*: *<system-message>*
-
-  where *<message>* is the passed message and *<system-message>* is the system
-  message corresponding to the error code.
-  *error_code* is a system error code as given by ``errno``.
-  \endrst
- */
-FMT_API void format_system_error(detail::buffer<char>& out, int error_code,
-                                 const char* message) noexcept;
-
-// Reports a system error without throwing an exception.
-// Can be used to report errors from destructors.
-FMT_API void report_system_error(int error_code, const char* message) noexcept;
-
-/** Fast integer formatter. */
-class format_int {
- private:
-  // Buffer should be large enough to hold all digits (digits10 + 1),
-  // a sign and a null character.
-  enum { buffer_size = std::numeric_limits<unsigned long long>::digits10 + 3 };
-  mutable char buffer_[buffer_size];
-  char* str_;
-
-  template <typename UInt> auto format_unsigned(UInt value) -> char* {
-    auto n = static_cast<detail::uint32_or_64_or_128_t<UInt>>(value);
-    return detail::format_decimal(buffer_, n, buffer_size - 1).begin;
-  }
-
-  template <typename Int> auto format_signed(Int value) -> char* {
-    auto abs_value = static_cast<detail::uint32_or_64_or_128_t<Int>>(value);
-    bool negative = value < 0;
-    if (negative) abs_value = 0 - abs_value;
-    auto begin = format_unsigned(abs_value);
-    if (negative) *--begin = '-';
-    return begin;
-  }
-
- public:
-  explicit format_int(int value) : str_(format_signed(value)) {}
-  explicit format_int(long value) : str_(format_signed(value)) {}
-  explicit format_int(long long value) : str_(format_signed(value)) {}
-  explicit format_int(unsigned value) : str_(format_unsigned(value)) {}
-  explicit format_int(unsigned long value) : str_(format_unsigned(value)) {}
-  explicit format_int(unsigned long long value)
-      : str_(format_unsigned(value)) {}
-
-  /** Returns the number of characters written to the output buffer. */
-  auto size() const -> size_t {
-    return detail::to_unsigned(buffer_ - str_ + buffer_size - 1);
-  }
-
-  /**
-    Returns a pointer to the output buffer content. No terminating null
-    character is appended.
-   */
-  auto data() const -> const char* { return str_; }
-
-  /**
-    Returns a pointer to the output buffer content with terminating null
-    character appended.
-   */
-  auto c_str() const -> const char* {
-    buffer_[buffer_size - 1] = '\0';
-    return str_;
-  }
-
-  /**
-    \rst
-    Returns the content of the output buffer as an ``std::string``.
-    \endrst
-   */
-  auto str() const -> std::string { return std::string(str_, size()); }
-};
-
-template <typename T, typename Char>
-struct formatter<T, Char, enable_if_t<detail::has_format_as<T>::value>>
-    : formatter<detail::format_as_t<T>, Char> {
-  template <typename FormatContext>
-  auto format(const T& value, FormatContext& ctx) const -> decltype(ctx.out()) {
-    using base = formatter<detail::format_as_t<T>, Char>;
-    return base::format(format_as(value), ctx);
-  }
-};
-
-#define FMT_FORMAT_AS(Type, Base) \
-  template <typename Char>        \
-  struct formatter<Type, Char> : formatter<Base, Char> {}
-
-FMT_FORMAT_AS(signed char, int);
-FMT_FORMAT_AS(unsigned char, unsigned);
-FMT_FORMAT_AS(short, int);
-FMT_FORMAT_AS(unsigned short, unsigned);
-FMT_FORMAT_AS(long, detail::long_type);
-FMT_FORMAT_AS(unsigned long, detail::ulong_type);
-FMT_FORMAT_AS(Char*, const Char*);
-FMT_FORMAT_AS(std::basic_string<Char>, basic_string_view<Char>);
-FMT_FORMAT_AS(std::nullptr_t, const void*);
-FMT_FORMAT_AS(detail::std_string_view<Char>, basic_string_view<Char>);
-FMT_FORMAT_AS(void*, const void*);
-
-template <typename Char, size_t N>
-struct formatter<Char[N], Char> : formatter<basic_string_view<Char>, Char> {};
-
-/**
-  \rst
-  Converts ``p`` to ``const void*`` for pointer formatting.
-
-  **Example**::
-
-    auto s = fmt::format("{}", fmt::ptr(p));
-  \endrst
- */
-template <typename T> auto ptr(T p) -> const void* {
-  static_assert(std::is_pointer<T>::value, "");
-  return detail::bit_cast<const void*>(p);
-}
-template <typename T, typename Deleter>
-auto ptr(const std::unique_ptr<T, Deleter>& p) -> const void* {
-  return p.get();
-}
-template <typename T> auto ptr(const std::shared_ptr<T>& p) -> const void* {
-  return p.get();
-}
-
-/**
-  \rst
-  Converts ``e`` to the underlying type.
-
-  **Example**::
-
-    enum class color { red, green, blue };
-    auto s = fmt::format("{}", fmt::underlying(color::red));
-  \endrst
- */
-template <typename Enum>
-constexpr auto underlying(Enum e) noexcept -> underlying_t<Enum> {
-  return static_cast<underlying_t<Enum>>(e);
-}
-
-namespace enums {
-template <typename Enum, FMT_ENABLE_IF(std::is_enum<Enum>::value)>
-constexpr auto format_as(Enum e) noexcept -> underlying_t<Enum> {
-  return static_cast<underlying_t<Enum>>(e);
-}
-}  // namespace enums
-
-class bytes {
- private:
-  string_view data_;
-  friend struct formatter<bytes>;
-
- public:
-  explicit bytes(string_view data) : data_(data) {}
-};
-
-template <> struct formatter<bytes> {
- private:
-  detail::dynamic_format_specs<> specs_;
-
- public:
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* {
-    return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
-                              detail::type::string_type);
-  }
-
-  template <typename FormatContext>
-  auto format(bytes b, FormatContext& ctx) -> decltype(ctx.out()) {
-    detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
-                                                       specs_.width_ref, ctx);
-    detail::handle_dynamic_spec<detail::precision_checker>(
-        specs_.precision, specs_.precision_ref, ctx);
-    return detail::write_bytes(ctx.out(), b.data_, specs_);
-  }
-};
-
-// group_digits_view is not derived from view because it copies the argument.
-template <typename T> struct group_digits_view {
-  T value;
-};
-
-/**
-  \rst
-  Returns a view that formats an integer value using ',' as a locale-independent
-  thousands separator.
-
-  **Example**::
-
-    fmt::print("{}", fmt::group_digits(12345));
-    // Output: "12,345"
-  \endrst
- */
-template <typename T> auto group_digits(T value) -> group_digits_view<T> {
-  return {value};
-}
-
-template <typename T> struct formatter<group_digits_view<T>> : formatter<T> {
- private:
-  detail::dynamic_format_specs<> specs_;
-
- public:
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const char* {
-    return parse_format_specs(ctx.begin(), ctx.end(), specs_, ctx,
-                              detail::type::int_type);
-  }
-
-  template <typename FormatContext>
-  auto format(group_digits_view<T> t, FormatContext& ctx)
-      -> decltype(ctx.out()) {
-    detail::handle_dynamic_spec<detail::width_checker>(specs_.width,
-                                                       specs_.width_ref, ctx);
-    detail::handle_dynamic_spec<detail::precision_checker>(
-        specs_.precision, specs_.precision_ref, ctx);
-    return detail::write_int(
-        ctx.out(), static_cast<detail::uint64_or_128_t<T>>(t.value), 0, specs_,
-        detail::digit_grouping<char>("\3", ","));
-  }
-};
-
-template <typename T> struct nested_view {
-  const formatter<T>* fmt;
-  const T* value;
-};
-
-template <typename T> struct formatter<nested_view<T>> {
-  FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> const char* {
-    return ctx.begin();
-  }
-  auto format(nested_view<T> view, format_context& ctx) const
-      -> decltype(ctx.out()) {
-    return view.fmt->format(*view.value, ctx);
-  }
-};
-
-template <typename T> struct nested_formatter {
- private:
-  int width_;
-  detail::fill_t<char> fill_;
-  align_t align_ : 4;
-  formatter<T> formatter_;
-
- public:
-  constexpr nested_formatter() : width_(0), align_(align_t::none) {}
-
-  FMT_CONSTEXPR auto parse(format_parse_context& ctx) -> const char* {
-    auto specs = detail::dynamic_format_specs<char>();
-    auto it = parse_format_specs(ctx.begin(), ctx.end(), specs, ctx,
-                                 detail::type::none_type);
-    width_ = specs.width;
-    fill_ = specs.fill;
-    align_ = specs.align;
-    ctx.advance_to(it);
-    return formatter_.parse(ctx);
-  }
-
-  template <typename F>
-  auto write_padded(format_context& ctx, F write) const -> decltype(ctx.out()) {
-    if (width_ == 0) return write(ctx.out());
-    auto buf = memory_buffer();
-    write(std::back_inserter(buf));
-    auto specs = format_specs<>();
-    specs.width = width_;
-    specs.fill = fill_;
-    specs.align = align_;
-    return detail::write(ctx.out(), string_view(buf.data(), buf.size()), specs);
-  }
-
-  auto nested(const T& value) const -> nested_view<T> {
-    return nested_view<T>{&formatter_, &value};
-  }
-};
-
-// DEPRECATED! join_view will be moved to ranges.h.
-template <typename It, typename Sentinel, typename Char = char>
-struct join_view : detail::view {
-  It begin;
-  Sentinel end;
-  basic_string_view<Char> sep;
-
-  join_view(It b, Sentinel e, basic_string_view<Char> s)
-      : begin(b), end(e), sep(s) {}
-};
-
-template <typename It, typename Sentinel, typename Char>
-struct formatter<join_view<It, Sentinel, Char>, Char> {
- private:
-  using value_type =
-#ifdef __cpp_lib_ranges
-      std::iter_value_t<It>;
-#else
-      typename std::iterator_traits<It>::value_type;
-#endif
-  formatter<remove_cvref_t<value_type>, Char> value_formatter_;
-
- public:
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> const Char* {
-    return value_formatter_.parse(ctx);
-  }
-
-  template <typename FormatContext>
-  auto format(const join_view<It, Sentinel, Char>& value,
-              FormatContext& ctx) const -> decltype(ctx.out()) {
-    auto it = value.begin;
-    auto out = ctx.out();
-    if (it != value.end) {
-      out = value_formatter_.format(*it, ctx);
-      ++it;
-      while (it != value.end) {
-        out = detail::copy_str<Char>(value.sep.begin(), value.sep.end(), out);
-        ctx.advance_to(out);
-        out = value_formatter_.format(*it, ctx);
-        ++it;
-      }
-    }
-    return out;
-  }
-};
-
-/**
-  Returns a view that formats the iterator range `[begin, end)` with elements
-  separated by `sep`.
- */
-template <typename It, typename Sentinel>
-auto join(It begin, Sentinel end, string_view sep) -> join_view<It, Sentinel> {
-  return {begin, end, sep};
-}
-
-/**
-  \rst
-  Returns a view that formats `range` with elements separated by `sep`.
-
-  **Example**::
-
-    std::vector<int> v = {1, 2, 3};
-    fmt::print("{}", fmt::join(v, ", "));
-    // Output: "1, 2, 3"
-
-  ``fmt::join`` applies passed format specifiers to the range elements::
-
-    fmt::print("{:02}", fmt::join(v, ", "));
-    // Output: "01, 02, 03"
-  \endrst
- */
-template <typename Range>
-auto join(Range&& range, string_view sep)
-    -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>> {
-  return join(std::begin(range), std::end(range), sep);
-}
-
-/**
-  \rst
-  Converts *value* to ``std::string`` using the default format for type *T*.
-
-  **Example**::
-
-    #include <fmt/format.h>
-
-    std::string answer = fmt::to_string(42);
-  \endrst
- */
-template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value &&
-                                    !detail::has_format_as<T>::value)>
-inline auto to_string(const T& value) -> std::string {
-  auto buffer = memory_buffer();
-  detail::write<char>(appender(buffer), value);
-  return {buffer.data(), buffer.size()};
-}
-
-template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-FMT_NODISCARD inline auto to_string(T value) -> std::string {
-  // The buffer should be large enough to store the number including the sign
-  // or "false" for bool.
-  constexpr int max_size = detail::digits10<T>() + 2;
-  char buffer[max_size > 5 ? static_cast<unsigned>(max_size) : 5];
-  char* begin = buffer;
-  return std::string(begin, detail::write<char>(begin, value));
-}
-
-template <typename Char, size_t SIZE>
-FMT_NODISCARD auto to_string(const basic_memory_buffer<Char, SIZE>& buf)
-    -> std::basic_string<Char> {
-  auto size = buf.size();
-  detail::assume(size < std::basic_string<Char>().max_size());
-  return std::basic_string<Char>(buf.data(), size);
-}
-
-template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value &&
-                                    detail::has_format_as<T>::value)>
-inline auto to_string(const T& value) -> std::string {
-  return to_string(format_as(value));
-}
-
-FMT_END_EXPORT
-
-namespace detail {
-
-template <typename Char>
-void vformat_to(buffer<Char>& buf, basic_string_view<Char> fmt,
-                typename vformat_args<Char>::type args, locale_ref loc) {
-  auto out = buffer_appender<Char>(buf);
-  if (fmt.size() == 2 && equal2(fmt.data(), "{}")) {
-    auto arg = args.get(0);
-    if (!arg) throw_format_error("argument not found");
-    visit_format_arg(default_arg_formatter<Char>{out, args, loc}, arg);
-    return;
-  }
-
-  struct format_handler : error_handler {
-    basic_format_parse_context<Char> parse_context;
-    buffer_context<Char> context;
-
-    format_handler(buffer_appender<Char> p_out, basic_string_view<Char> str,
-                   basic_format_args<buffer_context<Char>> p_args,
-                   locale_ref p_loc)
-        : parse_context(str), context(p_out, p_args, p_loc) {}
-
-    void on_text(const Char* begin, const Char* end) {
-      auto text = basic_string_view<Char>(begin, to_unsigned(end - begin));
-      context.advance_to(write<Char>(context.out(), text));
-    }
-
-    FMT_CONSTEXPR auto on_arg_id() -> int {
-      return parse_context.next_arg_id();
-    }
-    FMT_CONSTEXPR auto on_arg_id(int id) -> int {
-      return parse_context.check_arg_id(id), id;
-    }
-    FMT_CONSTEXPR auto on_arg_id(basic_string_view<Char> id) -> int {
-      int arg_id = context.arg_id(id);
-      if (arg_id < 0) throw_format_error("argument not found");
-      return arg_id;
-    }
-
-    FMT_INLINE void on_replacement_field(int id, const Char*) {
-      auto arg = get_arg(context, id);
-      context.advance_to(visit_format_arg(
-          default_arg_formatter<Char>{context.out(), context.args(),
-                                      context.locale()},
-          arg));
-    }
-
-    auto on_format_specs(int id, const Char* begin, const Char* end)
-        -> const Char* {
-      auto arg = get_arg(context, id);
-      // Not using a visitor for custom types gives better codegen.
-      if (arg.format_custom(begin, parse_context, context))
-        return parse_context.begin();
-      auto specs = detail::dynamic_format_specs<Char>();
-      begin = parse_format_specs(begin, end, specs, parse_context, arg.type());
-      detail::handle_dynamic_spec<detail::width_checker>(
-          specs.width, specs.width_ref, context);
-      detail::handle_dynamic_spec<detail::precision_checker>(
-          specs.precision, specs.precision_ref, context);
-      if (begin == end || *begin != '}')
-        throw_format_error("missing '}' in format string");
-      auto f = arg_formatter<Char>{context.out(), specs, context.locale()};
-      context.advance_to(visit_format_arg(f, arg));
-      return begin;
-    }
-  };
-  detail::parse_format_string<false>(fmt, format_handler(out, fmt, args, loc));
-}
-
-FMT_BEGIN_EXPORT
-
-#ifndef FMT_HEADER_ONLY
-extern template FMT_API void vformat_to(buffer<char>&, string_view,
-                                        typename vformat_args<>::type,
-                                        locale_ref);
-extern template FMT_API auto thousands_sep_impl<char>(locale_ref)
-    -> thousands_sep_result<char>;
-extern template FMT_API auto thousands_sep_impl<wchar_t>(locale_ref)
-    -> thousands_sep_result<wchar_t>;
-extern template FMT_API auto decimal_point_impl(locale_ref) -> char;
-extern template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
-#endif  // FMT_HEADER_ONLY
-
-}  // namespace detail
-
-#if FMT_USE_USER_DEFINED_LITERALS
-inline namespace literals {
-/**
-  \rst
-  User-defined literal equivalent of :func:`fmt::arg`.
-
-  **Example**::
-
-    using namespace fmt::literals;
-    fmt::print("Elapsed time: {s:.2f} seconds", "s"_a=1.23);
-  \endrst
- */
-#  if FMT_USE_NONTYPE_TEMPLATE_ARGS
-template <detail_exported::fixed_string Str> constexpr auto operator""_a() {
-  using char_t = remove_cvref_t<decltype(Str.data[0])>;
-  return detail::udl_arg<char_t, sizeof(Str.data) / sizeof(char_t), Str>();
-}
-#  else
-constexpr auto operator""_a(const char* s, size_t) -> detail::udl_arg<char> {
-  return {s};
-}
-#  endif
-}  // namespace literals
-#endif  // FMT_USE_USER_DEFINED_LITERALS
-
-template <typename Locale, FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
-inline auto vformat(const Locale& loc, string_view fmt, format_args args)
-    -> std::string {
-  return detail::vformat(loc, fmt, args);
-}
-
-template <typename Locale, typename... T,
-          FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
-inline auto format(const Locale& loc, format_string<T...> fmt, T&&... args)
-    -> std::string {
-  return fmt::vformat(loc, string_view(fmt), fmt::make_format_args(args...));
-}
-
-template <typename OutputIt, typename Locale,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
-                            detail::is_locale<Locale>::value)>
-auto vformat_to(OutputIt out, const Locale& loc, string_view fmt,
-                format_args args) -> OutputIt {
-  using detail::get_buffer;
-  auto&& buf = get_buffer<char>(out);
-  detail::vformat_to(buf, fmt, args, detail::locale_ref(loc));
-  return detail::get_iterator(buf, out);
-}
-
-template <typename OutputIt, typename Locale, typename... T,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, char>::value&&
-                            detail::is_locale<Locale>::value)>
-FMT_INLINE auto format_to(OutputIt out, const Locale& loc,
-                          format_string<T...> fmt, T&&... args) -> OutputIt {
-  return vformat_to(out, loc, fmt, fmt::make_format_args(args...));
-}
-
-template <typename Locale, typename... T,
-          FMT_ENABLE_IF(detail::is_locale<Locale>::value)>
-FMT_NODISCARD FMT_INLINE auto formatted_size(const Locale& loc,
-                                             format_string<T...> fmt,
-                                             T&&... args) -> size_t {
-  auto buf = detail::counting_buffer<>();
-  detail::vformat_to<char>(buf, fmt, fmt::make_format_args(args...),
-                           detail::locale_ref(loc));
-  return buf.count();
-}
-
-FMT_END_EXPORT
-
-template <typename T, typename Char>
-template <typename FormatContext>
-FMT_CONSTEXPR FMT_INLINE auto
-formatter<T, Char,
-          enable_if_t<detail::type_constant<T, Char>::value !=
-                      detail::type::custom_type>>::format(const T& val,
-                                                          FormatContext& ctx)
-    const -> decltype(ctx.out()) {
-  if (specs_.width_ref.kind == detail::arg_id_kind::none &&
-      specs_.precision_ref.kind == detail::arg_id_kind::none) {
-    return detail::write<Char>(ctx.out(), val, specs_, ctx.locale());
-  }
-  auto specs = specs_;
-  detail::handle_dynamic_spec<detail::width_checker>(specs.width,
-                                                     specs.width_ref, ctx);
-  detail::handle_dynamic_spec<detail::precision_checker>(
-      specs.precision, specs.precision_ref, ctx);
-  return detail::write<Char>(ctx.out(), val, specs, ctx.locale());
-}
-
-FMT_END_NAMESPACE
-
-#ifdef FMT_HEADER_ONLY
-#  define FMT_FUNC inline
-#  include "format-inl.h"
-#else
-#  define FMT_FUNC
-#endif
-
-#endif  // FMT_FORMAT_H_
diff --git a/3party/fmt/include/fmt/os.h b/3party/fmt/include/fmt/os.h
deleted file mode 100644
index 3c7b3cc..0000000
--- a/3party/fmt/include/fmt/os.h
+++ /dev/null
@@ -1,455 +0,0 @@
-// Formatting library for C++ - optional OS-specific functionality
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_OS_H_
-#define FMT_OS_H_
-
-#include <cerrno>
-#include <cstddef>
-#include <cstdio>
-#include <system_error>  // std::system_error
-
-#include "format.h"
-
-#if defined __APPLE__ || defined(__FreeBSD__)
-#  if FMT_HAS_INCLUDE(<xlocale.h>)
-#    include <xlocale.h>  // for LC_NUMERIC_MASK on OS X
-#  endif
-#endif
-
-#ifndef FMT_USE_FCNTL
-// UWP doesn't provide _pipe.
-#  if FMT_HAS_INCLUDE("winapifamily.h")
-#    include <winapifamily.h>
-#  endif
-#  if (FMT_HAS_INCLUDE(<fcntl.h>) || defined(__APPLE__) || \
-       defined(__linux__)) &&                              \
-      (!defined(WINAPI_FAMILY) ||                          \
-       (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
-#    include <fcntl.h>  // for O_RDONLY
-#    define FMT_USE_FCNTL 1
-#  else
-#    define FMT_USE_FCNTL 0
-#  endif
-#endif
-
-#ifndef FMT_POSIX
-#  if defined(_WIN32) && !defined(__MINGW32__)
-// Fix warnings about deprecated symbols.
-#    define FMT_POSIX(call) _##call
-#  else
-#    define FMT_POSIX(call) call
-#  endif
-#endif
-
-// Calls to system functions are wrapped in FMT_SYSTEM for testability.
-#ifdef FMT_SYSTEM
-#  define FMT_HAS_SYSTEM
-#  define FMT_POSIX_CALL(call) FMT_SYSTEM(call)
-#else
-#  define FMT_SYSTEM(call) ::call
-#  ifdef _WIN32
-// Fix warnings about deprecated symbols.
-#    define FMT_POSIX_CALL(call) ::_##call
-#  else
-#    define FMT_POSIX_CALL(call) ::call
-#  endif
-#endif
-
-// Retries the expression while it evaluates to error_result and errno
-// equals to EINTR.
-#ifndef _WIN32
-#  define FMT_RETRY_VAL(result, expression, error_result) \
-    do {                                                  \
-      (result) = (expression);                            \
-    } while ((result) == (error_result) && errno == EINTR)
-#else
-#  define FMT_RETRY_VAL(result, expression, error_result) result = (expression)
-#endif
-
-#define FMT_RETRY(result, expression) FMT_RETRY_VAL(result, expression, -1)
-
-FMT_BEGIN_NAMESPACE
-FMT_BEGIN_EXPORT
-
-/**
-  \rst
-  A reference to a null-terminated string. It can be constructed from a C
-  string or ``std::string``.
-
-  You can use one of the following type aliases for common character types:
-
-  +---------------+-----------------------------+
-  | Type          | Definition                  |
-  +===============+=============================+
-  | cstring_view  | basic_cstring_view<char>    |
-  +---------------+-----------------------------+
-  | wcstring_view | basic_cstring_view<wchar_t> |
-  +---------------+-----------------------------+
-
-  This class is most useful as a parameter type to allow passing
-  different types of strings to a function, for example::
-
-    template <typename... Args>
-    std::string format(cstring_view format_str, const Args & ... args);
-
-    format("{}", 42);
-    format(std::string("{}"), 42);
-  \endrst
- */
-template <typename Char> class basic_cstring_view {
- private:
-  const Char* data_;
-
- public:
-  /** Constructs a string reference object from a C string. */
-  basic_cstring_view(const Char* s) : data_(s) {}
-
-  /**
-    \rst
-    Constructs a string reference from an ``std::string`` object.
-    \endrst
-   */
-  basic_cstring_view(const std::basic_string<Char>& s) : data_(s.c_str()) {}
-
-  /** Returns the pointer to a C string. */
-  auto c_str() const -> const Char* { return data_; }
-};
-
-using cstring_view = basic_cstring_view<char>;
-using wcstring_view = basic_cstring_view<wchar_t>;
-
-#ifdef _WIN32
-FMT_API const std::error_category& system_category() noexcept;
-
-namespace detail {
-FMT_API void format_windows_error(buffer<char>& out, int error_code,
-                                  const char* message) noexcept;
-}
-
-FMT_API std::system_error vwindows_error(int error_code, string_view format_str,
-                                         format_args args);
-
-/**
- \rst
- Constructs a :class:`std::system_error` object with the description
- of the form
-
- .. parsed-literal::
-   *<message>*: *<system-message>*
-
- where *<message>* is the formatted message and *<system-message>* is the
- system message corresponding to the error code.
- *error_code* is a Windows error code as given by ``GetLastError``.
- If *error_code* is not a valid error code such as -1, the system message
- will look like "error -1".
-
- **Example**::
-
-   // This throws a system_error with the description
-   //   cannot open file 'madeup': The system cannot find the file specified.
-   // or similar (system message may vary).
-   const char *filename = "madeup";
-   LPOFSTRUCT of = LPOFSTRUCT();
-   HFILE file = OpenFile(filename, &of, OF_READ);
-   if (file == HFILE_ERROR) {
-     throw fmt::windows_error(GetLastError(),
-                              "cannot open file '{}'", filename);
-   }
- \endrst
-*/
-template <typename... Args>
-std::system_error windows_error(int error_code, string_view message,
-                                const Args&... args) {
-  return vwindows_error(error_code, message, fmt::make_format_args(args...));
-}
-
-// Reports a Windows error without throwing an exception.
-// Can be used to report errors from destructors.
-FMT_API void report_windows_error(int error_code, const char* message) noexcept;
-#else
-inline auto system_category() noexcept -> const std::error_category& {
-  return std::system_category();
-}
-#endif  // _WIN32
-
-// std::system is not available on some platforms such as iOS (#2248).
-#ifdef __OSX__
-template <typename S, typename... Args, typename Char = char_t<S>>
-void say(const S& format_str, Args&&... args) {
-  std::system(format("say \"{}\"", format(format_str, args...)).c_str());
-}
-#endif
-
-// A buffered file.
-class buffered_file {
- private:
-  FILE* file_;
-
-  friend class file;
-
-  explicit buffered_file(FILE* f) : file_(f) {}
-
- public:
-  buffered_file(const buffered_file&) = delete;
-  void operator=(const buffered_file&) = delete;
-
-  // Constructs a buffered_file object which doesn't represent any file.
-  buffered_file() noexcept : file_(nullptr) {}
-
-  // Destroys the object closing the file it represents if any.
-  FMT_API ~buffered_file() noexcept;
-
- public:
-  buffered_file(buffered_file&& other) noexcept : file_(other.file_) {
-    other.file_ = nullptr;
-  }
-
-  auto operator=(buffered_file&& other) -> buffered_file& {
-    close();
-    file_ = other.file_;
-    other.file_ = nullptr;
-    return *this;
-  }
-
-  // Opens a file.
-  FMT_API buffered_file(cstring_view filename, cstring_view mode);
-
-  // Closes the file.
-  FMT_API void close();
-
-  // Returns the pointer to a FILE object representing this file.
-  auto get() const noexcept -> FILE* { return file_; }
-
-  FMT_API auto descriptor() const -> int;
-
-  void vprint(string_view format_str, format_args args) {
-    fmt::vprint(file_, format_str, args);
-  }
-
-  template <typename... Args>
-  inline void print(string_view format_str, const Args&... args) {
-    vprint(format_str, fmt::make_format_args(args...));
-  }
-};
-
-#if FMT_USE_FCNTL
-// A file. Closed file is represented by a file object with descriptor -1.
-// Methods that are not declared with noexcept may throw
-// fmt::system_error in case of failure. Note that some errors such as
-// closing the file multiple times will cause a crash on Windows rather
-// than an exception. You can get standard behavior by overriding the
-// invalid parameter handler with _set_invalid_parameter_handler.
-class FMT_API file {
- private:
-  int fd_;  // File descriptor.
-
-  // Constructs a file object with a given descriptor.
-  explicit file(int fd) : fd_(fd) {}
-
- public:
-  // Possible values for the oflag argument to the constructor.
-  enum {
-    RDONLY = FMT_POSIX(O_RDONLY),  // Open for reading only.
-    WRONLY = FMT_POSIX(O_WRONLY),  // Open for writing only.
-    RDWR = FMT_POSIX(O_RDWR),      // Open for reading and writing.
-    CREATE = FMT_POSIX(O_CREAT),   // Create if the file doesn't exist.
-    APPEND = FMT_POSIX(O_APPEND),  // Open in append mode.
-    TRUNC = FMT_POSIX(O_TRUNC)     // Truncate the content of the file.
-  };
-
-  // Constructs a file object which doesn't represent any file.
-  file() noexcept : fd_(-1) {}
-
-  // Opens a file and constructs a file object representing this file.
-  file(cstring_view path, int oflag);
-
- public:
-  file(const file&) = delete;
-  void operator=(const file&) = delete;
-
-  file(file&& other) noexcept : fd_(other.fd_) { other.fd_ = -1; }
-
-  // Move assignment is not noexcept because close may throw.
-  auto operator=(file&& other) -> file& {
-    close();
-    fd_ = other.fd_;
-    other.fd_ = -1;
-    return *this;
-  }
-
-  // Destroys the object closing the file it represents if any.
-  ~file() noexcept;
-
-  // Returns the file descriptor.
-  auto descriptor() const noexcept -> int { return fd_; }
-
-  // Closes the file.
-  void close();
-
-  // Returns the file size. The size has signed type for consistency with
-  // stat::st_size.
-  auto size() const -> long long;
-
-  // Attempts to read count bytes from the file into the specified buffer.
-  auto read(void* buffer, size_t count) -> size_t;
-
-  // Attempts to write count bytes from the specified buffer to the file.
-  auto write(const void* buffer, size_t count) -> size_t;
-
-  // Duplicates a file descriptor with the dup function and returns
-  // the duplicate as a file object.
-  static auto dup(int fd) -> file;
-
-  // Makes fd be the copy of this file descriptor, closing fd first if
-  // necessary.
-  void dup2(int fd);
-
-  // Makes fd be the copy of this file descriptor, closing fd first if
-  // necessary.
-  void dup2(int fd, std::error_code& ec) noexcept;
-
-  // Creates a pipe setting up read_end and write_end file objects for reading
-  // and writing respectively.
-  // DEPRECATED! Taking files as out parameters is deprecated.
-  static void pipe(file& read_end, file& write_end);
-
-  // Creates a buffered_file object associated with this file and detaches
-  // this file object from the file.
-  auto fdopen(const char* mode) -> buffered_file;
-
-#  if defined(_WIN32) && !defined(__MINGW32__)
-  // Opens a file and constructs a file object representing this file by
-  // wcstring_view filename. Windows only.
-  static file open_windows_file(wcstring_view path, int oflag);
-#  endif
-};
-
-// Returns the memory page size.
-auto getpagesize() -> long;
-
-namespace detail {
-
-struct buffer_size {
-  buffer_size() = default;
-  size_t value = 0;
-  auto operator=(size_t val) const -> buffer_size {
-    auto bs = buffer_size();
-    bs.value = val;
-    return bs;
-  }
-};
-
-struct ostream_params {
-  int oflag = file::WRONLY | file::CREATE | file::TRUNC;
-  size_t buffer_size = BUFSIZ > 32768 ? BUFSIZ : 32768;
-
-  ostream_params() {}
-
-  template <typename... T>
-  ostream_params(T... params, int new_oflag) : ostream_params(params...) {
-    oflag = new_oflag;
-  }
-
-  template <typename... T>
-  ostream_params(T... params, detail::buffer_size bs)
-      : ostream_params(params...) {
-    this->buffer_size = bs.value;
-  }
-
-// Intel has a bug that results in failure to deduce a constructor
-// for empty parameter packs.
-#  if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 2000
-  ostream_params(int new_oflag) : oflag(new_oflag) {}
-  ostream_params(detail::buffer_size bs) : buffer_size(bs.value) {}
-#  endif
-};
-
-class file_buffer final : public buffer<char> {
-  file file_;
-
-  FMT_API void grow(size_t) override;
-
- public:
-  FMT_API file_buffer(cstring_view path, const ostream_params& params);
-  FMT_API file_buffer(file_buffer&& other);
-  FMT_API ~file_buffer();
-
-  void flush() {
-    if (size() == 0) return;
-    file_.write(data(), size() * sizeof(data()[0]));
-    clear();
-  }
-
-  void close() {
-    flush();
-    file_.close();
-  }
-};
-
-}  // namespace detail
-
-// Added {} below to work around default constructor error known to
-// occur in Xcode versions 7.2.1 and 8.2.1.
-constexpr detail::buffer_size buffer_size{};
-
-/** A fast output stream which is not thread-safe. */
-class FMT_API ostream {
- private:
-  FMT_MSC_WARNING(suppress : 4251)
-  detail::file_buffer buffer_;
-
-  ostream(cstring_view path, const detail::ostream_params& params)
-      : buffer_(path, params) {}
-
- public:
-  ostream(ostream&& other) : buffer_(std::move(other.buffer_)) {}
-
-  ~ostream();
-
-  void flush() { buffer_.flush(); }
-
-  template <typename... T>
-  friend auto output_file(cstring_view path, T... params) -> ostream;
-
-  void close() { buffer_.close(); }
-
-  /**
-    Formats ``args`` according to specifications in ``fmt`` and writes the
-    output to the file.
-   */
-  template <typename... T> void print(format_string<T...> fmt, T&&... args) {
-    vformat_to(std::back_inserter(buffer_), fmt,
-               fmt::make_format_args(args...));
-  }
-};
-
-/**
-  \rst
-  Opens a file for writing. Supported parameters passed in *params*:
-
-  * ``<integer>``: Flags passed to `open
-    <https://pubs.opengroup.org/onlinepubs/007904875/functions/open.html>`_
-    (``file::WRONLY | file::CREATE | file::TRUNC`` by default)
-  * ``buffer_size=<integer>``: Output buffer size
-
-  **Example**::
-
-    auto out = fmt::output_file("guide.txt");
-    out.print("Don't {}", "Panic");
-  \endrst
- */
-template <typename... T>
-inline auto output_file(cstring_view path, T... params) -> ostream {
-  return {path, detail::ostream_params(params...)};
-}
-#endif  // FMT_USE_FCNTL
-
-FMT_END_EXPORT
-FMT_END_NAMESPACE
-
-#endif  // FMT_OS_H_
diff --git a/3party/fmt/include/fmt/ostream.h b/3party/fmt/include/fmt/ostream.h
deleted file mode 100644
index 26fb3b5..0000000
--- a/3party/fmt/include/fmt/ostream.h
+++ /dev/null
@@ -1,245 +0,0 @@
-// Formatting library for C++ - std::ostream support
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_OSTREAM_H_
-#define FMT_OSTREAM_H_
-
-#include <fstream>  // std::filebuf
-
-#ifdef _WIN32
-#  ifdef __GLIBCXX__
-#    include <ext/stdio_filebuf.h>
-#    include <ext/stdio_sync_filebuf.h>
-#  endif
-#  include <io.h>
-#endif
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-template <typename Streambuf> class formatbuf : public Streambuf {
- private:
-  using char_type = typename Streambuf::char_type;
-  using streamsize = decltype(std::declval<Streambuf>().sputn(nullptr, 0));
-  using int_type = typename Streambuf::int_type;
-  using traits_type = typename Streambuf::traits_type;
-
-  buffer<char_type>& buffer_;
-
- public:
-  explicit formatbuf(buffer<char_type>& buf) : buffer_(buf) {}
-
- protected:
-  // The put area is always empty. This makes the implementation simpler and has
-  // the advantage that the streambuf and the buffer are always in sync and
-  // sputc never writes into uninitialized memory. A disadvantage is that each
-  // call to sputc always results in a (virtual) call to overflow. There is no
-  // disadvantage here for sputn since this always results in a call to xsputn.
-
-  auto overflow(int_type ch) -> int_type override {
-    if (!traits_type::eq_int_type(ch, traits_type::eof()))
-      buffer_.push_back(static_cast<char_type>(ch));
-    return ch;
-  }
-
-  auto xsputn(const char_type* s, streamsize count) -> streamsize override {
-    buffer_.append(s, s + count);
-    return count;
-  }
-};
-
-// Generate a unique explicit instantion in every translation unit using a tag
-// type in an anonymous namespace.
-namespace {
-struct file_access_tag {};
-}  // namespace
-template <typename Tag, typename BufType, FILE* BufType::*FileMemberPtr>
-class file_access {
-  friend auto get_file(BufType& obj) -> FILE* { return obj.*FileMemberPtr; }
-};
-
-#if FMT_MSC_VERSION
-template class file_access<file_access_tag, std::filebuf,
-                           &std::filebuf::_Myfile>;
-auto get_file(std::filebuf&) -> FILE*;
-#endif
-
-inline auto write_ostream_unicode(std::ostream& os, fmt::string_view data)
-    -> bool {
-  FILE* f = nullptr;
-#if FMT_MSC_VERSION
-  if (auto* buf = dynamic_cast<std::filebuf*>(os.rdbuf()))
-    f = get_file(*buf);
-  else
-    return false;
-#elif defined(_WIN32) && defined(__GLIBCXX__)
-  auto* rdbuf = os.rdbuf();
-  if (auto* sfbuf = dynamic_cast<__gnu_cxx::stdio_sync_filebuf<char>*>(rdbuf))
-    f = sfbuf->file();
-  else if (auto* fbuf = dynamic_cast<__gnu_cxx::stdio_filebuf<char>*>(rdbuf))
-    f = fbuf->file();
-  else
-    return false;
-#else
-  ignore_unused(os, data, f);
-#endif
-#ifdef _WIN32
-  if (f) {
-    int fd = _fileno(f);
-    if (_isatty(fd)) {
-      os.flush();
-      return write_console(fd, data);
-    }
-  }
-#endif
-  return false;
-}
-inline auto write_ostream_unicode(std::wostream&,
-                                  fmt::basic_string_view<wchar_t>) -> bool {
-  return false;
-}
-
-// Write the content of buf to os.
-// It is a separate function rather than a part of vprint to simplify testing.
-template <typename Char>
-void write_buffer(std::basic_ostream<Char>& os, buffer<Char>& buf) {
-  const Char* buf_data = buf.data();
-  using unsigned_streamsize = std::make_unsigned<std::streamsize>::type;
-  unsigned_streamsize size = buf.size();
-  unsigned_streamsize max_size = to_unsigned(max_value<std::streamsize>());
-  do {
-    unsigned_streamsize n = size <= max_size ? size : max_size;
-    os.write(buf_data, static_cast<std::streamsize>(n));
-    buf_data += n;
-    size -= n;
-  } while (size != 0);
-}
-
-template <typename Char, typename T>
-void format_value(buffer<Char>& buf, const T& value) {
-  auto&& format_buf = formatbuf<std::basic_streambuf<Char>>(buf);
-  auto&& output = std::basic_ostream<Char>(&format_buf);
-#if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)
-  output.imbue(std::locale::classic());  // The default is always unlocalized.
-#endif
-  output << value;
-  output.exceptions(std::ios_base::failbit | std::ios_base::badbit);
-}
-
-template <typename T> struct streamed_view {
-  const T& value;
-};
-
-}  // namespace detail
-
-// Formats an object of type T that has an overloaded ostream operator<<.
-template <typename Char>
-struct basic_ostream_formatter : formatter<basic_string_view<Char>, Char> {
-  void set_debug_format() = delete;
-
-  template <typename T, typename OutputIt>
-  auto format(const T& value, basic_format_context<OutputIt, Char>& ctx) const
-      -> OutputIt {
-    auto buffer = basic_memory_buffer<Char>();
-    detail::format_value(buffer, value);
-    return formatter<basic_string_view<Char>, Char>::format(
-        {buffer.data(), buffer.size()}, ctx);
-  }
-};
-
-using ostream_formatter = basic_ostream_formatter<char>;
-
-template <typename T, typename Char>
-struct formatter<detail::streamed_view<T>, Char>
-    : basic_ostream_formatter<Char> {
-  template <typename OutputIt>
-  auto format(detail::streamed_view<T> view,
-              basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
-    return basic_ostream_formatter<Char>::format(view.value, ctx);
-  }
-};
-
-/**
-  \rst
-  Returns a view that formats `value` via an ostream ``operator<<``.
-
-  **Example**::
-
-    fmt::print("Current thread id: {}\n",
-               fmt::streamed(std::this_thread::get_id()));
-  \endrst
- */
-template <typename T>
-constexpr auto streamed(const T& value) -> detail::streamed_view<T> {
-  return {value};
-}
-
-namespace detail {
-
-inline void vprint_directly(std::ostream& os, string_view format_str,
-                            format_args args) {
-  auto buffer = memory_buffer();
-  detail::vformat_to(buffer, format_str, args);
-  detail::write_buffer(os, buffer);
-}
-
-}  // namespace detail
-
-FMT_EXPORT template <typename Char>
-void vprint(std::basic_ostream<Char>& os,
-            basic_string_view<type_identity_t<Char>> format_str,
-            basic_format_args<buffer_context<type_identity_t<Char>>> args) {
-  auto buffer = basic_memory_buffer<Char>();
-  detail::vformat_to(buffer, format_str, args);
-  if (detail::write_ostream_unicode(os, {buffer.data(), buffer.size()})) return;
-  detail::write_buffer(os, buffer);
-}
-
-/**
-  \rst
-  Prints formatted data to the stream *os*.
-
-  **Example**::
-
-    fmt::print(cerr, "Don't {}!", "panic");
-  \endrst
- */
-FMT_EXPORT template <typename... T>
-void print(std::ostream& os, format_string<T...> fmt, T&&... args) {
-  const auto& vargs = fmt::make_format_args(args...);
-  if (detail::is_utf8())
-    vprint(os, fmt, vargs);
-  else
-    detail::vprint_directly(os, fmt, vargs);
-}
-
-FMT_EXPORT
-template <typename... Args>
-void print(std::wostream& os,
-           basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
-           Args&&... args) {
-  vprint(os, fmt, fmt::make_format_args<buffer_context<wchar_t>>(args...));
-}
-
-FMT_EXPORT template <typename... T>
-void println(std::ostream& os, format_string<T...> fmt, T&&... args) {
-  fmt::print(os, "{}\n", fmt::format(fmt, std::forward<T>(args)...));
-}
-
-FMT_EXPORT
-template <typename... Args>
-void println(std::wostream& os,
-             basic_format_string<wchar_t, type_identity_t<Args>...> fmt,
-             Args&&... args) {
-  print(os, L"{}\n", fmt::format(fmt, std::forward<Args>(args)...));
-}
-
-FMT_END_NAMESPACE
-
-#endif  // FMT_OSTREAM_H_
diff --git a/3party/fmt/include/fmt/printf.h b/3party/fmt/include/fmt/printf.h
deleted file mode 100644
index 07e8157..0000000
--- a/3party/fmt/include/fmt/printf.h
+++ /dev/null
@@ -1,675 +0,0 @@
-// Formatting library for C++ - legacy printf implementation
-//
-// Copyright (c) 2012 - 2016, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_PRINTF_H_
-#define FMT_PRINTF_H_
-
-#include <algorithm>  // std::max
-#include <limits>     // std::numeric_limits
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-FMT_BEGIN_EXPORT
-
-template <typename T> struct printf_formatter {
-  printf_formatter() = delete;
-};
-
-template <typename Char> class basic_printf_context {
- private:
-  detail::buffer_appender<Char> out_;
-  basic_format_args<basic_printf_context> args_;
-
-  static_assert(std::is_same<Char, char>::value ||
-                    std::is_same<Char, wchar_t>::value,
-                "Unsupported code unit type.");
-
- public:
-  using char_type = Char;
-  using parse_context_type = basic_format_parse_context<Char>;
-  template <typename T> using formatter_type = printf_formatter<T>;
-
-  /**
-    \rst
-    Constructs a ``printf_context`` object. References to the arguments are
-    stored in the context object so make sure they have appropriate lifetimes.
-    \endrst
-   */
-  basic_printf_context(detail::buffer_appender<Char> out,
-                       basic_format_args<basic_printf_context> args)
-      : out_(out), args_(args) {}
-
-  auto out() -> detail::buffer_appender<Char> { return out_; }
-  void advance_to(detail::buffer_appender<Char>) {}
-
-  auto locale() -> detail::locale_ref { return {}; }
-
-  auto arg(int id) const -> basic_format_arg<basic_printf_context> {
-    return args_.get(id);
-  }
-
-  FMT_CONSTEXPR void on_error(const char* message) {
-    detail::error_handler().on_error(message);
-  }
-};
-
-namespace detail {
-
-// Checks if a value fits in int - used to avoid warnings about comparing
-// signed and unsigned integers.
-template <bool IsSigned> struct int_checker {
-  template <typename T> static auto fits_in_int(T value) -> bool {
-    unsigned max = max_value<int>();
-    return value <= max;
-  }
-  static auto fits_in_int(bool) -> bool { return true; }
-};
-
-template <> struct int_checker<true> {
-  template <typename T> static auto fits_in_int(T value) -> bool {
-    return value >= (std::numeric_limits<int>::min)() &&
-           value <= max_value<int>();
-  }
-  static auto fits_in_int(int) -> bool { return true; }
-};
-
-struct printf_precision_handler {
-  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-  auto operator()(T value) -> int {
-    if (!int_checker<std::numeric_limits<T>::is_signed>::fits_in_int(value))
-      throw_format_error("number is too big");
-    return (std::max)(static_cast<int>(value), 0);
-  }
-
-  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-  auto operator()(T) -> int {
-    throw_format_error("precision is not integer");
-    return 0;
-  }
-};
-
-// An argument visitor that returns true iff arg is a zero integer.
-struct is_zero_int {
-  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-  auto operator()(T value) -> bool {
-    return value == 0;
-  }
-
-  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-  auto operator()(T) -> bool {
-    return false;
-  }
-};
-
-template <typename T> struct make_unsigned_or_bool : std::make_unsigned<T> {};
-
-template <> struct make_unsigned_or_bool<bool> {
-  using type = bool;
-};
-
-template <typename T, typename Context> class arg_converter {
- private:
-  using char_type = typename Context::char_type;
-
-  basic_format_arg<Context>& arg_;
-  char_type type_;
-
- public:
-  arg_converter(basic_format_arg<Context>& arg, char_type type)
-      : arg_(arg), type_(type) {}
-
-  void operator()(bool value) {
-    if (type_ != 's') operator()<bool>(value);
-  }
-
-  template <typename U, FMT_ENABLE_IF(std::is_integral<U>::value)>
-  void operator()(U value) {
-    bool is_signed = type_ == 'd' || type_ == 'i';
-    using target_type = conditional_t<std::is_same<T, void>::value, U, T>;
-    if (const_check(sizeof(target_type) <= sizeof(int))) {
-      // Extra casts are used to silence warnings.
-      if (is_signed) {
-        auto n = static_cast<int>(static_cast<target_type>(value));
-        arg_ = detail::make_arg<Context>(n);
-      } else {
-        using unsigned_type = typename make_unsigned_or_bool<target_type>::type;
-        auto n = static_cast<unsigned>(static_cast<unsigned_type>(value));
-        arg_ = detail::make_arg<Context>(n);
-      }
-    } else {
-      if (is_signed) {
-        // glibc's printf doesn't sign extend arguments of smaller types:
-        //   std::printf("%lld", -42);  // prints "4294967254"
-        // but we don't have to do the same because it's a UB.
-        auto n = static_cast<long long>(value);
-        arg_ = detail::make_arg<Context>(n);
-      } else {
-        auto n = static_cast<typename make_unsigned_or_bool<U>::type>(value);
-        arg_ = detail::make_arg<Context>(n);
-      }
-    }
-  }
-
-  template <typename U, FMT_ENABLE_IF(!std::is_integral<U>::value)>
-  void operator()(U) {}  // No conversion needed for non-integral types.
-};
-
-// Converts an integer argument to T for printf, if T is an integral type.
-// If T is void, the argument is converted to corresponding signed or unsigned
-// type depending on the type specifier: 'd' and 'i' - signed, other -
-// unsigned).
-template <typename T, typename Context, typename Char>
-void convert_arg(basic_format_arg<Context>& arg, Char type) {
-  visit_format_arg(arg_converter<T, Context>(arg, type), arg);
-}
-
-// Converts an integer argument to char for printf.
-template <typename Context> class char_converter {
- private:
-  basic_format_arg<Context>& arg_;
-
- public:
-  explicit char_converter(basic_format_arg<Context>& arg) : arg_(arg) {}
-
-  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-  void operator()(T value) {
-    auto c = static_cast<typename Context::char_type>(value);
-    arg_ = detail::make_arg<Context>(c);
-  }
-
-  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-  void operator()(T) {}  // No conversion needed for non-integral types.
-};
-
-// An argument visitor that return a pointer to a C string if argument is a
-// string or null otherwise.
-template <typename Char> struct get_cstring {
-  template <typename T> auto operator()(T) -> const Char* { return nullptr; }
-  auto operator()(const Char* s) -> const Char* { return s; }
-};
-
-// Checks if an argument is a valid printf width specifier and sets
-// left alignment if it is negative.
-template <typename Char> class printf_width_handler {
- private:
-  format_specs<Char>& specs_;
-
- public:
-  explicit printf_width_handler(format_specs<Char>& specs) : specs_(specs) {}
-
-  template <typename T, FMT_ENABLE_IF(std::is_integral<T>::value)>
-  auto operator()(T value) -> unsigned {
-    auto width = static_cast<uint32_or_64_or_128_t<T>>(value);
-    if (detail::is_negative(value)) {
-      specs_.align = align::left;
-      width = 0 - width;
-    }
-    unsigned int_max = max_value<int>();
-    if (width > int_max) throw_format_error("number is too big");
-    return static_cast<unsigned>(width);
-  }
-
-  template <typename T, FMT_ENABLE_IF(!std::is_integral<T>::value)>
-  auto operator()(T) -> unsigned {
-    throw_format_error("width is not integer");
-    return 0;
-  }
-};
-
-// Workaround for a bug with the XL compiler when initializing
-// printf_arg_formatter's base class.
-template <typename Char>
-auto make_arg_formatter(buffer_appender<Char> iter, format_specs<Char>& s)
-    -> arg_formatter<Char> {
-  return {iter, s, locale_ref()};
-}
-
-// The ``printf`` argument formatter.
-template <typename Char>
-class printf_arg_formatter : public arg_formatter<Char> {
- private:
-  using base = arg_formatter<Char>;
-  using context_type = basic_printf_context<Char>;
-
-  context_type& context_;
-
-  void write_null_pointer(bool is_string = false) {
-    auto s = this->specs;
-    s.type = presentation_type::none;
-    write_bytes(this->out, is_string ? "(null)" : "(nil)", s);
-  }
-
- public:
-  printf_arg_formatter(buffer_appender<Char> iter, format_specs<Char>& s,
-                       context_type& ctx)
-      : base(make_arg_formatter(iter, s)), context_(ctx) {}
-
-  void operator()(monostate value) { base::operator()(value); }
-
-  template <typename T, FMT_ENABLE_IF(detail::is_integral<T>::value)>
-  void operator()(T value) {
-    // MSVC2013 fails to compile separate overloads for bool and Char so use
-    // std::is_same instead.
-    if (!std::is_same<T, Char>::value) {
-      base::operator()(value);
-      return;
-    }
-    format_specs<Char> fmt_specs = this->specs;
-    if (fmt_specs.type != presentation_type::none &&
-        fmt_specs.type != presentation_type::chr) {
-      return (*this)(static_cast<int>(value));
-    }
-    fmt_specs.sign = sign::none;
-    fmt_specs.alt = false;
-    fmt_specs.fill[0] = ' ';  // Ignore '0' flag for char types.
-    // align::numeric needs to be overwritten here since the '0' flag is
-    // ignored for non-numeric types
-    if (fmt_specs.align == align::none || fmt_specs.align == align::numeric)
-      fmt_specs.align = align::right;
-    write<Char>(this->out, static_cast<Char>(value), fmt_specs);
-  }
-
-  template <typename T, FMT_ENABLE_IF(std::is_floating_point<T>::value)>
-  void operator()(T value) {
-    base::operator()(value);
-  }
-
-  /** Formats a null-terminated C string. */
-  void operator()(const char* value) {
-    if (value)
-      base::operator()(value);
-    else
-      write_null_pointer(this->specs.type != presentation_type::pointer);
-  }
-
-  /** Formats a null-terminated wide C string. */
-  void operator()(const wchar_t* value) {
-    if (value)
-      base::operator()(value);
-    else
-      write_null_pointer(this->specs.type != presentation_type::pointer);
-  }
-
-  void operator()(basic_string_view<Char> value) { base::operator()(value); }
-
-  /** Formats a pointer. */
-  void operator()(const void* value) {
-    if (value)
-      base::operator()(value);
-    else
-      write_null_pointer();
-  }
-
-  /** Formats an argument of a custom (user-defined) type. */
-  void operator()(typename basic_format_arg<context_type>::handle handle) {
-    auto parse_ctx = basic_format_parse_context<Char>({});
-    handle.format(parse_ctx, context_);
-  }
-};
-
-template <typename Char>
-void parse_flags(format_specs<Char>& specs, const Char*& it, const Char* end) {
-  for (; it != end; ++it) {
-    switch (*it) {
-    case '-':
-      specs.align = align::left;
-      break;
-    case '+':
-      specs.sign = sign::plus;
-      break;
-    case '0':
-      specs.fill[0] = '0';
-      break;
-    case ' ':
-      if (specs.sign != sign::plus) specs.sign = sign::space;
-      break;
-    case '#':
-      specs.alt = true;
-      break;
-    default:
-      return;
-    }
-  }
-}
-
-template <typename Char, typename GetArg>
-auto parse_header(const Char*& it, const Char* end, format_specs<Char>& specs,
-                  GetArg get_arg) -> int {
-  int arg_index = -1;
-  Char c = *it;
-  if (c >= '0' && c <= '9') {
-    // Parse an argument index (if followed by '$') or a width possibly
-    // preceded with '0' flag(s).
-    int value = parse_nonnegative_int(it, end, -1);
-    if (it != end && *it == '$') {  // value is an argument index
-      ++it;
-      arg_index = value != -1 ? value : max_value<int>();
-    } else {
-      if (c == '0') specs.fill[0] = '0';
-      if (value != 0) {
-        // Nonzero value means that we parsed width and don't need to
-        // parse it or flags again, so return now.
-        if (value == -1) throw_format_error("number is too big");
-        specs.width = value;
-        return arg_index;
-      }
-    }
-  }
-  parse_flags(specs, it, end);
-  // Parse width.
-  if (it != end) {
-    if (*it >= '0' && *it <= '9') {
-      specs.width = parse_nonnegative_int(it, end, -1);
-      if (specs.width == -1) throw_format_error("number is too big");
-    } else if (*it == '*') {
-      ++it;
-      specs.width = static_cast<int>(visit_format_arg(
-          detail::printf_width_handler<Char>(specs), get_arg(-1)));
-    }
-  }
-  return arg_index;
-}
-
-inline auto parse_printf_presentation_type(char c, type t)
-    -> presentation_type {
-  using pt = presentation_type;
-  constexpr auto integral_set = sint_set | uint_set | bool_set | char_set;
-  switch (c) {
-  case 'd':
-    return in(t, integral_set) ? pt::dec : pt::none;
-  case 'o':
-    return in(t, integral_set) ? pt::oct : pt::none;
-  case 'x':
-    return in(t, integral_set) ? pt::hex_lower : pt::none;
-  case 'X':
-    return in(t, integral_set) ? pt::hex_upper : pt::none;
-  case 'a':
-    return in(t, float_set) ? pt::hexfloat_lower : pt::none;
-  case 'A':
-    return in(t, float_set) ? pt::hexfloat_upper : pt::none;
-  case 'e':
-    return in(t, float_set) ? pt::exp_lower : pt::none;
-  case 'E':
-    return in(t, float_set) ? pt::exp_upper : pt::none;
-  case 'f':
-    return in(t, float_set) ? pt::fixed_lower : pt::none;
-  case 'F':
-    return in(t, float_set) ? pt::fixed_upper : pt::none;
-  case 'g':
-    return in(t, float_set) ? pt::general_lower : pt::none;
-  case 'G':
-    return in(t, float_set) ? pt::general_upper : pt::none;
-  case 'c':
-    return in(t, integral_set) ? pt::chr : pt::none;
-  case 's':
-    return in(t, string_set | cstring_set) ? pt::string : pt::none;
-  case 'p':
-    return in(t, pointer_set | cstring_set) ? pt::pointer : pt::none;
-  default:
-    return pt::none;
-  }
-}
-
-template <typename Char, typename Context>
-void vprintf(buffer<Char>& buf, basic_string_view<Char> format,
-             basic_format_args<Context> args) {
-  using iterator = buffer_appender<Char>;
-  auto out = iterator(buf);
-  auto context = basic_printf_context<Char>(out, args);
-  auto parse_ctx = basic_format_parse_context<Char>(format);
-
-  // Returns the argument with specified index or, if arg_index is -1, the next
-  // argument.
-  auto get_arg = [&](int arg_index) {
-    if (arg_index < 0)
-      arg_index = parse_ctx.next_arg_id();
-    else
-      parse_ctx.check_arg_id(--arg_index);
-    return detail::get_arg(context, arg_index);
-  };
-
-  const Char* start = parse_ctx.begin();
-  const Char* end = parse_ctx.end();
-  auto it = start;
-  while (it != end) {
-    if (!find<false, Char>(it, end, '%', it)) {
-      it = end;  // find leaves it == nullptr if it doesn't find '%'.
-      break;
-    }
-    Char c = *it++;
-    if (it != end && *it == c) {
-      write(out, basic_string_view<Char>(start, to_unsigned(it - start)));
-      start = ++it;
-      continue;
-    }
-    write(out, basic_string_view<Char>(start, to_unsigned(it - 1 - start)));
-
-    auto specs = format_specs<Char>();
-    specs.align = align::right;
-
-    // Parse argument index, flags and width.
-    int arg_index = parse_header(it, end, specs, get_arg);
-    if (arg_index == 0) throw_format_error("argument not found");
-
-    // Parse precision.
-    if (it != end && *it == '.') {
-      ++it;
-      c = it != end ? *it : 0;
-      if ('0' <= c && c <= '9') {
-        specs.precision = parse_nonnegative_int(it, end, 0);
-      } else if (c == '*') {
-        ++it;
-        specs.precision = static_cast<int>(
-            visit_format_arg(printf_precision_handler(), get_arg(-1)));
-      } else {
-        specs.precision = 0;
-      }
-    }
-
-    auto arg = get_arg(arg_index);
-    // For d, i, o, u, x, and X conversion specifiers, if a precision is
-    // specified, the '0' flag is ignored
-    if (specs.precision >= 0 && arg.is_integral()) {
-      // Ignore '0' for non-numeric types or if '-' present.
-      specs.fill[0] = ' ';
-    }
-    if (specs.precision >= 0 && arg.type() == type::cstring_type) {
-      auto str = visit_format_arg(get_cstring<Char>(), arg);
-      auto str_end = str + specs.precision;
-      auto nul = std::find(str, str_end, Char());
-      auto sv = basic_string_view<Char>(
-          str, to_unsigned(nul != str_end ? nul - str : specs.precision));
-      arg = make_arg<basic_printf_context<Char>>(sv);
-    }
-    if (specs.alt && visit_format_arg(is_zero_int(), arg)) specs.alt = false;
-    if (specs.fill[0] == '0') {
-      if (arg.is_arithmetic() && specs.align != align::left)
-        specs.align = align::numeric;
-      else
-        specs.fill[0] = ' ';  // Ignore '0' flag for non-numeric types or if '-'
-                              // flag is also present.
-    }
-
-    // Parse length and convert the argument to the required type.
-    c = it != end ? *it++ : 0;
-    Char t = it != end ? *it : 0;
-    switch (c) {
-    case 'h':
-      if (t == 'h') {
-        ++it;
-        t = it != end ? *it : 0;
-        convert_arg<signed char>(arg, t);
-      } else {
-        convert_arg<short>(arg, t);
-      }
-      break;
-    case 'l':
-      if (t == 'l') {
-        ++it;
-        t = it != end ? *it : 0;
-        convert_arg<long long>(arg, t);
-      } else {
-        convert_arg<long>(arg, t);
-      }
-      break;
-    case 'j':
-      convert_arg<intmax_t>(arg, t);
-      break;
-    case 'z':
-      convert_arg<size_t>(arg, t);
-      break;
-    case 't':
-      convert_arg<std::ptrdiff_t>(arg, t);
-      break;
-    case 'L':
-      // printf produces garbage when 'L' is omitted for long double, no
-      // need to do the same.
-      break;
-    default:
-      --it;
-      convert_arg<void>(arg, c);
-    }
-
-    // Parse type.
-    if (it == end) throw_format_error("invalid format string");
-    char type = static_cast<char>(*it++);
-    if (arg.is_integral()) {
-      // Normalize type.
-      switch (type) {
-      case 'i':
-      case 'u':
-        type = 'd';
-        break;
-      case 'c':
-        visit_format_arg(char_converter<basic_printf_context<Char>>(arg), arg);
-        break;
-      }
-    }
-    specs.type = parse_printf_presentation_type(type, arg.type());
-    if (specs.type == presentation_type::none)
-      throw_format_error("invalid format specifier");
-
-    start = it;
-
-    // Format argument.
-    visit_format_arg(printf_arg_formatter<Char>(out, specs, context), arg);
-  }
-  write(out, basic_string_view<Char>(start, to_unsigned(it - start)));
-}
-}  // namespace detail
-
-using printf_context = basic_printf_context<char>;
-using wprintf_context = basic_printf_context<wchar_t>;
-
-using printf_args = basic_format_args<printf_context>;
-using wprintf_args = basic_format_args<wprintf_context>;
-
-/**
-  \rst
-  Constructs an `~fmt::format_arg_store` object that contains references to
-  arguments and can be implicitly converted to `~fmt::printf_args`.
-  \endrst
- */
-template <typename... T>
-inline auto make_printf_args(const T&... args)
-    -> format_arg_store<printf_context, T...> {
-  return {args...};
-}
-
-// DEPRECATED!
-template <typename... T>
-inline auto make_wprintf_args(const T&... args)
-    -> format_arg_store<wprintf_context, T...> {
-  return {args...};
-}
-
-template <typename Char>
-inline auto vsprintf(
-    basic_string_view<Char> fmt,
-    basic_format_args<basic_printf_context<type_identity_t<Char>>> args)
-    -> std::basic_string<Char> {
-  auto buf = basic_memory_buffer<Char>();
-  detail::vprintf(buf, fmt, args);
-  return to_string(buf);
-}
-
-/**
-  \rst
-  Formats arguments and returns the result as a string.
-
-  **Example**::
-
-    std::string message = fmt::sprintf("The answer is %d", 42);
-  \endrst
-*/
-template <typename S, typename... T,
-          typename Char = enable_if_t<detail::is_string<S>::value, char_t<S>>>
-inline auto sprintf(const S& fmt, const T&... args) -> std::basic_string<Char> {
-  return vsprintf(detail::to_string_view(fmt),
-                  fmt::make_format_args<basic_printf_context<Char>>(args...));
-}
-
-template <typename Char>
-inline auto vfprintf(
-    std::FILE* f, basic_string_view<Char> fmt,
-    basic_format_args<basic_printf_context<type_identity_t<Char>>> args)
-    -> int {
-  auto buf = basic_memory_buffer<Char>();
-  detail::vprintf(buf, fmt, args);
-  size_t size = buf.size();
-  return std::fwrite(buf.data(), sizeof(Char), size, f) < size
-             ? -1
-             : static_cast<int>(size);
-}
-
-/**
-  \rst
-  Prints formatted data to the file *f*.
-
-  **Example**::
-
-    fmt::fprintf(stderr, "Don't %s!", "panic");
-  \endrst
- */
-template <typename S, typename... T, typename Char = char_t<S>>
-inline auto fprintf(std::FILE* f, const S& fmt, const T&... args) -> int {
-  return vfprintf(f, detail::to_string_view(fmt),
-                  fmt::make_format_args<basic_printf_context<Char>>(args...));
-}
-
-template <typename Char>
-FMT_DEPRECATED inline auto vprintf(
-    basic_string_view<Char> fmt,
-    basic_format_args<basic_printf_context<type_identity_t<Char>>> args)
-    -> int {
-  return vfprintf(stdout, fmt, args);
-}
-
-/**
-  \rst
-  Prints formatted data to ``stdout``.
-
-  **Example**::
-
-    fmt::printf("Elapsed time: %.2f seconds", 1.23);
-  \endrst
- */
-template <typename... T>
-inline auto printf(string_view fmt, const T&... args) -> int {
-  return vfprintf(stdout, fmt, make_printf_args(args...));
-}
-template <typename... T>
-FMT_DEPRECATED inline auto printf(basic_string_view<wchar_t> fmt,
-                                  const T&... args) -> int {
-  return vfprintf(stdout, fmt, make_wprintf_args(args...));
-}
-
-FMT_END_EXPORT
-FMT_END_NAMESPACE
-
-#endif  // FMT_PRINTF_H_
diff --git a/3party/fmt/include/fmt/ranges.h b/3party/fmt/include/fmt/ranges.h
deleted file mode 100644
index 3638fff..0000000
--- a/3party/fmt/include/fmt/ranges.h
+++ /dev/null
@@ -1,738 +0,0 @@
-// Formatting library for C++ - range and tuple support
-//
-// Copyright (c) 2012 - present, Victor Zverovich and {fmt} contributors
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_RANGES_H_
-#define FMT_RANGES_H_
-
-#include <initializer_list>
-#include <tuple>
-#include <type_traits>
-
-#include "format.h"
-
-FMT_BEGIN_NAMESPACE
-
-namespace detail {
-
-template <typename Range, typename OutputIt>
-auto copy(const Range& range, OutputIt out) -> OutputIt {
-  for (auto it = range.begin(), end = range.end(); it != end; ++it)
-    *out++ = *it;
-  return out;
-}
-
-template <typename OutputIt>
-auto copy(const char* str, OutputIt out) -> OutputIt {
-  while (*str) *out++ = *str++;
-  return out;
-}
-
-template <typename OutputIt> auto copy(char ch, OutputIt out) -> OutputIt {
-  *out++ = ch;
-  return out;
-}
-
-template <typename OutputIt> auto copy(wchar_t ch, OutputIt out) -> OutputIt {
-  *out++ = ch;
-  return out;
-}
-
-// Returns true if T has a std::string-like interface, like std::string_view.
-template <typename T> class is_std_string_like {
-  template <typename U>
-  static auto check(U* p)
-      -> decltype((void)p->find('a'), p->length(), (void)p->data(), int());
-  template <typename> static void check(...);
-
- public:
-  static constexpr const bool value =
-      is_string<T>::value ||
-      std::is_convertible<T, std_string_view<char>>::value ||
-      !std::is_void<decltype(check<T>(nullptr))>::value;
-};
-
-template <typename Char>
-struct is_std_string_like<fmt::basic_string_view<Char>> : std::true_type {};
-
-template <typename T> class is_map {
-  template <typename U> static auto check(U*) -> typename U::mapped_type;
-  template <typename> static void check(...);
-
- public:
-#ifdef FMT_FORMAT_MAP_AS_LIST  // DEPRECATED!
-  static constexpr const bool value = false;
-#else
-  static constexpr const bool value =
-      !std::is_void<decltype(check<T>(nullptr))>::value;
-#endif
-};
-
-template <typename T> class is_set {
-  template <typename U> static auto check(U*) -> typename U::key_type;
-  template <typename> static void check(...);
-
- public:
-#ifdef FMT_FORMAT_SET_AS_LIST  // DEPRECATED!
-  static constexpr const bool value = false;
-#else
-  static constexpr const bool value =
-      !std::is_void<decltype(check<T>(nullptr))>::value && !is_map<T>::value;
-#endif
-};
-
-template <typename... Ts> struct conditional_helper {};
-
-template <typename T, typename _ = void> struct is_range_ : std::false_type {};
-
-#if !FMT_MSC_VERSION || FMT_MSC_VERSION > 1800
-
-#  define FMT_DECLTYPE_RETURN(val)  \
-    ->decltype(val) { return val; } \
-    static_assert(                  \
-        true, "")  // This makes it so that a semicolon is required after the
-                   // macro, which helps clang-format handle the formatting.
-
-// C array overload
-template <typename T, std::size_t N>
-auto range_begin(const T (&arr)[N]) -> const T* {
-  return arr;
-}
-template <typename T, std::size_t N>
-auto range_end(const T (&arr)[N]) -> const T* {
-  return arr + N;
-}
-
-template <typename T, typename Enable = void>
-struct has_member_fn_begin_end_t : std::false_type {};
-
-template <typename T>
-struct has_member_fn_begin_end_t<T, void_t<decltype(std::declval<T>().begin()),
-                                           decltype(std::declval<T>().end())>>
-    : std::true_type {};
-
-// Member function overload
-template <typename T>
-auto range_begin(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).begin());
-template <typename T>
-auto range_end(T&& rng) FMT_DECLTYPE_RETURN(static_cast<T&&>(rng).end());
-
-// ADL overload. Only participates in overload resolution if member functions
-// are not found.
-template <typename T>
-auto range_begin(T&& rng)
-    -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
-                   decltype(begin(static_cast<T&&>(rng)))> {
-  return begin(static_cast<T&&>(rng));
-}
-template <typename T>
-auto range_end(T&& rng) -> enable_if_t<!has_member_fn_begin_end_t<T&&>::value,
-                                       decltype(end(static_cast<T&&>(rng)))> {
-  return end(static_cast<T&&>(rng));
-}
-
-template <typename T, typename Enable = void>
-struct has_const_begin_end : std::false_type {};
-template <typename T, typename Enable = void>
-struct has_mutable_begin_end : std::false_type {};
-
-template <typename T>
-struct has_const_begin_end<
-    T,
-    void_t<
-        decltype(detail::range_begin(std::declval<const remove_cvref_t<T>&>())),
-        decltype(detail::range_end(std::declval<const remove_cvref_t<T>&>()))>>
-    : std::true_type {};
-
-template <typename T>
-struct has_mutable_begin_end<
-    T, void_t<decltype(detail::range_begin(std::declval<T>())),
-              decltype(detail::range_end(std::declval<T>())),
-              // the extra int here is because older versions of MSVC don't
-              // SFINAE properly unless there are distinct types
-              int>> : std::true_type {};
-
-template <typename T>
-struct is_range_<T, void>
-    : std::integral_constant<bool, (has_const_begin_end<T>::value ||
-                                    has_mutable_begin_end<T>::value)> {};
-#  undef FMT_DECLTYPE_RETURN
-#endif
-
-// tuple_size and tuple_element check.
-template <typename T> class is_tuple_like_ {
-  template <typename U>
-  static auto check(U* p) -> decltype(std::tuple_size<U>::value, int());
-  template <typename> static void check(...);
-
- public:
-  static constexpr const bool value =
-      !std::is_void<decltype(check<T>(nullptr))>::value;
-};
-
-// Check for integer_sequence
-#if defined(__cpp_lib_integer_sequence) || FMT_MSC_VERSION >= 1900
-template <typename T, T... N>
-using integer_sequence = std::integer_sequence<T, N...>;
-template <size_t... N> using index_sequence = std::index_sequence<N...>;
-template <size_t N> using make_index_sequence = std::make_index_sequence<N>;
-#else
-template <typename T, T... N> struct integer_sequence {
-  using value_type = T;
-
-  static FMT_CONSTEXPR auto size() -> size_t { return sizeof...(N); }
-};
-
-template <size_t... N> using index_sequence = integer_sequence<size_t, N...>;
-
-template <typename T, size_t N, T... Ns>
-struct make_integer_sequence : make_integer_sequence<T, N - 1, N - 1, Ns...> {};
-template <typename T, T... Ns>
-struct make_integer_sequence<T, 0, Ns...> : integer_sequence<T, Ns...> {};
-
-template <size_t N>
-using make_index_sequence = make_integer_sequence<size_t, N>;
-#endif
-
-template <typename T>
-using tuple_index_sequence = make_index_sequence<std::tuple_size<T>::value>;
-
-template <typename T, typename C, bool = is_tuple_like_<T>::value>
-class is_tuple_formattable_ {
- public:
-  static constexpr const bool value = false;
-};
-template <typename T, typename C> class is_tuple_formattable_<T, C, true> {
-  template <std::size_t... Is>
-  static auto check2(index_sequence<Is...>,
-                     integer_sequence<bool, (Is == Is)...>) -> std::true_type;
-  static auto check2(...) -> std::false_type;
-  template <std::size_t... Is>
-  static auto check(index_sequence<Is...>) -> decltype(check2(
-      index_sequence<Is...>{},
-      integer_sequence<bool,
-                       (is_formattable<typename std::tuple_element<Is, T>::type,
-                                       C>::value)...>{}));
-
- public:
-  static constexpr const bool value =
-      decltype(check(tuple_index_sequence<T>{}))::value;
-};
-
-template <typename Tuple, typename F, size_t... Is>
-FMT_CONSTEXPR void for_each(index_sequence<Is...>, Tuple&& t, F&& f) {
-  using std::get;
-  // Using a free function get<Is>(Tuple) now.
-  const int unused[] = {0, ((void)f(get<Is>(t)), 0)...};
-  ignore_unused(unused);
-}
-
-template <typename Tuple, typename F>
-FMT_CONSTEXPR void for_each(Tuple&& t, F&& f) {
-  for_each(tuple_index_sequence<remove_cvref_t<Tuple>>(),
-           std::forward<Tuple>(t), std::forward<F>(f));
-}
-
-template <typename Tuple1, typename Tuple2, typename F, size_t... Is>
-void for_each2(index_sequence<Is...>, Tuple1&& t1, Tuple2&& t2, F&& f) {
-  using std::get;
-  const int unused[] = {0, ((void)f(get<Is>(t1), get<Is>(t2)), 0)...};
-  ignore_unused(unused);
-}
-
-template <typename Tuple1, typename Tuple2, typename F>
-void for_each2(Tuple1&& t1, Tuple2&& t2, F&& f) {
-  for_each2(tuple_index_sequence<remove_cvref_t<Tuple1>>(),
-            std::forward<Tuple1>(t1), std::forward<Tuple2>(t2),
-            std::forward<F>(f));
-}
-
-namespace tuple {
-// Workaround a bug in MSVC 2019 (v140).
-template <typename Char, typename... T>
-using result_t = std::tuple<formatter<remove_cvref_t<T>, Char>...>;
-
-using std::get;
-template <typename Tuple, typename Char, std::size_t... Is>
-auto get_formatters(index_sequence<Is...>)
-    -> result_t<Char, decltype(get<Is>(std::declval<Tuple>()))...>;
-}  // namespace tuple
-
-#if FMT_MSC_VERSION && FMT_MSC_VERSION < 1920
-// Older MSVC doesn't get the reference type correctly for arrays.
-template <typename R> struct range_reference_type_impl {
-  using type = decltype(*detail::range_begin(std::declval<R&>()));
-};
-
-template <typename T, std::size_t N> struct range_reference_type_impl<T[N]> {
-  using type = T&;
-};
-
-template <typename T>
-using range_reference_type = typename range_reference_type_impl<T>::type;
-#else
-template <typename Range>
-using range_reference_type =
-    decltype(*detail::range_begin(std::declval<Range&>()));
-#endif
-
-// We don't use the Range's value_type for anything, but we do need the Range's
-// reference type, with cv-ref stripped.
-template <typename Range>
-using uncvref_type = remove_cvref_t<range_reference_type<Range>>;
-
-template <typename Formatter>
-FMT_CONSTEXPR auto maybe_set_debug_format(Formatter& f, bool set)
-    -> decltype(f.set_debug_format(set)) {
-  f.set_debug_format(set);
-}
-template <typename Formatter>
-FMT_CONSTEXPR void maybe_set_debug_format(Formatter&, ...) {}
-
-// These are not generic lambdas for compatibility with C++11.
-template <typename ParseContext> struct parse_empty_specs {
-  template <typename Formatter> FMT_CONSTEXPR void operator()(Formatter& f) {
-    f.parse(ctx);
-    detail::maybe_set_debug_format(f, true);
-  }
-  ParseContext& ctx;
-};
-template <typename FormatContext> struct format_tuple_element {
-  using char_type = typename FormatContext::char_type;
-
-  template <typename T>
-  void operator()(const formatter<T, char_type>& f, const T& v) {
-    if (i > 0)
-      ctx.advance_to(detail::copy_str<char_type>(separator, ctx.out()));
-    ctx.advance_to(f.format(v, ctx));
-    ++i;
-  }
-
-  int i;
-  FormatContext& ctx;
-  basic_string_view<char_type> separator;
-};
-
-}  // namespace detail
-
-template <typename T> struct is_tuple_like {
-  static constexpr const bool value =
-      detail::is_tuple_like_<T>::value && !detail::is_range_<T>::value;
-};
-
-template <typename T, typename C> struct is_tuple_formattable {
-  static constexpr const bool value =
-      detail::is_tuple_formattable_<T, C>::value;
-};
-
-template <typename Tuple, typename Char>
-struct formatter<Tuple, Char,
-                 enable_if_t<fmt::is_tuple_like<Tuple>::value &&
-                             fmt::is_tuple_formattable<Tuple, Char>::value>> {
- private:
-  decltype(detail::tuple::get_formatters<Tuple, Char>(
-      detail::tuple_index_sequence<Tuple>())) formatters_;
-
-  basic_string_view<Char> separator_ = detail::string_literal<Char, ',', ' '>{};
-  basic_string_view<Char> opening_bracket_ =
-      detail::string_literal<Char, '('>{};
-  basic_string_view<Char> closing_bracket_ =
-      detail::string_literal<Char, ')'>{};
-
- public:
-  FMT_CONSTEXPR formatter() {}
-
-  FMT_CONSTEXPR void set_separator(basic_string_view<Char> sep) {
-    separator_ = sep;
-  }
-
-  FMT_CONSTEXPR void set_brackets(basic_string_view<Char> open,
-                                  basic_string_view<Char> close) {
-    opening_bracket_ = open;
-    closing_bracket_ = close;
-  }
-
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    auto it = ctx.begin();
-    if (it != ctx.end() && *it != '}')
-      FMT_THROW(format_error("invalid format specifier"));
-    detail::for_each(formatters_, detail::parse_empty_specs<ParseContext>{ctx});
-    return it;
-  }
-
-  template <typename FormatContext>
-  auto format(const Tuple& value, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    ctx.advance_to(detail::copy_str<Char>(opening_bracket_, ctx.out()));
-    detail::for_each2(
-        formatters_, value,
-        detail::format_tuple_element<FormatContext>{0, ctx, separator_});
-    return detail::copy_str<Char>(closing_bracket_, ctx.out());
-  }
-};
-
-template <typename T, typename Char> struct is_range {
-  static constexpr const bool value =
-      detail::is_range_<T>::value && !detail::is_std_string_like<T>::value &&
-      !std::is_convertible<T, std::basic_string<Char>>::value &&
-      !std::is_convertible<T, detail::std_string_view<Char>>::value;
-};
-
-namespace detail {
-template <typename Context> struct range_mapper {
-  using mapper = arg_mapper<Context>;
-
-  template <typename T,
-            FMT_ENABLE_IF(has_formatter<remove_cvref_t<T>, Context>::value)>
-  static auto map(T&& value) -> T&& {
-    return static_cast<T&&>(value);
-  }
-  template <typename T,
-            FMT_ENABLE_IF(!has_formatter<remove_cvref_t<T>, Context>::value)>
-  static auto map(T&& value)
-      -> decltype(mapper().map(static_cast<T&&>(value))) {
-    return mapper().map(static_cast<T&&>(value));
-  }
-};
-
-template <typename Char, typename Element>
-using range_formatter_type =
-    formatter<remove_cvref_t<decltype(range_mapper<buffer_context<Char>>{}.map(
-                  std::declval<Element>()))>,
-              Char>;
-
-template <typename R>
-using maybe_const_range =
-    conditional_t<has_const_begin_end<R>::value, const R, R>;
-
-// Workaround a bug in MSVC 2015 and earlier.
-#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1910
-template <typename R, typename Char>
-struct is_formattable_delayed
-    : is_formattable<uncvref_type<maybe_const_range<R>>, Char> {};
-#endif
-}  // namespace detail
-
-template <typename...> struct conjunction : std::true_type {};
-template <typename P> struct conjunction<P> : P {};
-template <typename P1, typename... Pn>
-struct conjunction<P1, Pn...>
-    : conditional_t<bool(P1::value), conjunction<Pn...>, P1> {};
-
-template <typename T, typename Char, typename Enable = void>
-struct range_formatter;
-
-template <typename T, typename Char>
-struct range_formatter<
-    T, Char,
-    enable_if_t<conjunction<std::is_same<T, remove_cvref_t<T>>,
-                            is_formattable<T, Char>>::value>> {
- private:
-  detail::range_formatter_type<Char, T> underlying_;
-  basic_string_view<Char> separator_ = detail::string_literal<Char, ',', ' '>{};
-  basic_string_view<Char> opening_bracket_ =
-      detail::string_literal<Char, '['>{};
-  basic_string_view<Char> closing_bracket_ =
-      detail::string_literal<Char, ']'>{};
-
- public:
-  FMT_CONSTEXPR range_formatter() {}
-
-  FMT_CONSTEXPR auto underlying() -> detail::range_formatter_type<Char, T>& {
-    return underlying_;
-  }
-
-  FMT_CONSTEXPR void set_separator(basic_string_view<Char> sep) {
-    separator_ = sep;
-  }
-
-  FMT_CONSTEXPR void set_brackets(basic_string_view<Char> open,
-                                  basic_string_view<Char> close) {
-    opening_bracket_ = open;
-    closing_bracket_ = close;
-  }
-
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    auto it = ctx.begin();
-    auto end = ctx.end();
-
-    if (it != end && *it == 'n') {
-      set_brackets({}, {});
-      ++it;
-    }
-
-    if (it != end && *it != '}') {
-      if (*it != ':') FMT_THROW(format_error("invalid format specifier"));
-      ++it;
-    } else {
-      detail::maybe_set_debug_format(underlying_, true);
-    }
-
-    ctx.advance_to(it);
-    return underlying_.parse(ctx);
-  }
-
-  template <typename R, typename FormatContext>
-  auto format(R&& range, FormatContext& ctx) const -> decltype(ctx.out()) {
-    detail::range_mapper<buffer_context<Char>> mapper;
-    auto out = ctx.out();
-    out = detail::copy_str<Char>(opening_bracket_, out);
-    int i = 0;
-    auto it = detail::range_begin(range);
-    auto end = detail::range_end(range);
-    for (; it != end; ++it) {
-      if (i > 0) out = detail::copy_str<Char>(separator_, out);
-      ctx.advance_to(out);
-      auto&& item = *it;
-      out = underlying_.format(mapper.map(item), ctx);
-      ++i;
-    }
-    out = detail::copy_str<Char>(closing_bracket_, out);
-    return out;
-  }
-};
-
-enum class range_format { disabled, map, set, sequence, string, debug_string };
-
-namespace detail {
-template <typename T>
-struct range_format_kind_
-    : std::integral_constant<range_format,
-                             std::is_same<uncvref_type<T>, T>::value
-                                 ? range_format::disabled
-                             : is_map<T>::value ? range_format::map
-                             : is_set<T>::value ? range_format::set
-                                                : range_format::sequence> {};
-
-template <range_format K, typename R, typename Char, typename Enable = void>
-struct range_default_formatter;
-
-template <range_format K>
-using range_format_constant = std::integral_constant<range_format, K>;
-
-template <range_format K, typename R, typename Char>
-struct range_default_formatter<
-    K, R, Char,
-    enable_if_t<(K == range_format::sequence || K == range_format::map ||
-                 K == range_format::set)>> {
-  using range_type = detail::maybe_const_range<R>;
-  range_formatter<detail::uncvref_type<range_type>, Char> underlying_;
-
-  FMT_CONSTEXPR range_default_formatter() { init(range_format_constant<K>()); }
-
-  FMT_CONSTEXPR void init(range_format_constant<range_format::set>) {
-    underlying_.set_brackets(detail::string_literal<Char, '{'>{},
-                             detail::string_literal<Char, '}'>{});
-  }
-
-  FMT_CONSTEXPR void init(range_format_constant<range_format::map>) {
-    underlying_.set_brackets(detail::string_literal<Char, '{'>{},
-                             detail::string_literal<Char, '}'>{});
-    underlying_.underlying().set_brackets({}, {});
-    underlying_.underlying().set_separator(
-        detail::string_literal<Char, ':', ' '>{});
-  }
-
-  FMT_CONSTEXPR void init(range_format_constant<range_format::sequence>) {}
-
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return underlying_.parse(ctx);
-  }
-
-  template <typename FormatContext>
-  auto format(range_type& range, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    return underlying_.format(range, ctx);
-  }
-};
-}  // namespace detail
-
-template <typename T, typename Char, typename Enable = void>
-struct range_format_kind
-    : conditional_t<
-          is_range<T, Char>::value, detail::range_format_kind_<T>,
-          std::integral_constant<range_format, range_format::disabled>> {};
-
-template <typename R, typename Char>
-struct formatter<
-    R, Char,
-    enable_if_t<conjunction<bool_constant<range_format_kind<R, Char>::value !=
-                                          range_format::disabled>
-// Workaround a bug in MSVC 2015 and earlier.
-#if !FMT_MSC_VERSION || FMT_MSC_VERSION >= 1910
-                            ,
-                            detail::is_formattable_delayed<R, Char>
-#endif
-                            >::value>>
-    : detail::range_default_formatter<range_format_kind<R, Char>::value, R,
-                                      Char> {
-};
-
-template <typename Char, typename... T> struct tuple_join_view : detail::view {
-  const std::tuple<T...>& tuple;
-  basic_string_view<Char> sep;
-
-  tuple_join_view(const std::tuple<T...>& t, basic_string_view<Char> s)
-      : tuple(t), sep{s} {}
-};
-
-// Define FMT_TUPLE_JOIN_SPECIFIERS to enable experimental format specifiers
-// support in tuple_join. It is disabled by default because of issues with
-// the dynamic width and precision.
-#ifndef FMT_TUPLE_JOIN_SPECIFIERS
-#  define FMT_TUPLE_JOIN_SPECIFIERS 0
-#endif
-
-template <typename Char, typename... T>
-struct formatter<tuple_join_view<Char, T...>, Char> {
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return do_parse(ctx, std::integral_constant<size_t, sizeof...(T)>());
-  }
-
-  template <typename FormatContext>
-  auto format(const tuple_join_view<Char, T...>& value,
-              FormatContext& ctx) const -> typename FormatContext::iterator {
-    return do_format(value, ctx,
-                     std::integral_constant<size_t, sizeof...(T)>());
-  }
-
- private:
-  std::tuple<formatter<typename std::decay<T>::type, Char>...> formatters_;
-
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto do_parse(ParseContext& ctx,
-                              std::integral_constant<size_t, 0>)
-      -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename ParseContext, size_t N>
-  FMT_CONSTEXPR auto do_parse(ParseContext& ctx,
-                              std::integral_constant<size_t, N>)
-      -> decltype(ctx.begin()) {
-    auto end = ctx.begin();
-#if FMT_TUPLE_JOIN_SPECIFIERS
-    end = std::get<sizeof...(T) - N>(formatters_).parse(ctx);
-    if (N > 1) {
-      auto end1 = do_parse(ctx, std::integral_constant<size_t, N - 1>());
-      if (end != end1)
-        FMT_THROW(format_error("incompatible format specs for tuple elements"));
-    }
-#endif
-    return end;
-  }
-
-  template <typename FormatContext>
-  auto do_format(const tuple_join_view<Char, T...>&, FormatContext& ctx,
-                 std::integral_constant<size_t, 0>) const ->
-      typename FormatContext::iterator {
-    return ctx.out();
-  }
-
-  template <typename FormatContext, size_t N>
-  auto do_format(const tuple_join_view<Char, T...>& value, FormatContext& ctx,
-                 std::integral_constant<size_t, N>) const ->
-      typename FormatContext::iterator {
-    auto out = std::get<sizeof...(T) - N>(formatters_)
-                   .format(std::get<sizeof...(T) - N>(value.tuple), ctx);
-    if (N > 1) {
-      out = std::copy(value.sep.begin(), value.sep.end(), out);
-      ctx.advance_to(out);
-      return do_format(value, ctx, std::integral_constant<size_t, N - 1>());
-    }
-    return out;
-  }
-};
-
-namespace detail {
-// Check if T has an interface like a container adaptor (e.g. std::stack,
-// std::queue, std::priority_queue).
-template <typename T> class is_container_adaptor_like {
-  template <typename U> static auto check(U* p) -> typename U::container_type;
-  template <typename> static void check(...);
-
- public:
-  static constexpr const bool value =
-      !std::is_void<decltype(check<T>(nullptr))>::value;
-};
-
-template <typename Container> struct all {
-  const Container& c;
-  auto begin() const -> typename Container::const_iterator { return c.begin(); }
-  auto end() const -> typename Container::const_iterator { return c.end(); }
-};
-}  // namespace detail
-
-template <typename T, typename Char>
-struct formatter<
-    T, Char,
-    enable_if_t<conjunction<detail::is_container_adaptor_like<T>,
-                            bool_constant<range_format_kind<T, Char>::value ==
-                                          range_format::disabled>>::value>>
-    : formatter<detail::all<typename T::container_type>, Char> {
-  using all = detail::all<typename T::container_type>;
-  template <typename FormatContext>
-  auto format(const T& t, FormatContext& ctx) const -> decltype(ctx.out()) {
-    struct getter : T {
-      static auto get(const T& t) -> all {
-        return {t.*(&getter::c)};  // Access c through the derived class.
-      }
-    };
-    return formatter<all>::format(getter::get(t), ctx);
-  }
-};
-
-FMT_BEGIN_EXPORT
-
-/**
-  \rst
-  Returns an object that formats `tuple` with elements separated by `sep`.
-
-  **Example**::
-
-    std::tuple<int, char> t = {1, 'a'};
-    fmt::print("{}", fmt::join(t, ", "));
-    // Output: "1, a"
-  \endrst
- */
-template <typename... T>
-FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple, string_view sep)
-    -> tuple_join_view<char, T...> {
-  return {tuple, sep};
-}
-
-template <typename... T>
-FMT_CONSTEXPR auto join(const std::tuple<T...>& tuple,
-                        basic_string_view<wchar_t> sep)
-    -> tuple_join_view<wchar_t, T...> {
-  return {tuple, sep};
-}
-
-/**
-  \rst
-  Returns an object that formats `initializer_list` with elements separated by
-  `sep`.
-
-  **Example**::
-
-    fmt::print("{}", fmt::join({1, 2, 3}, ", "));
-    // Output: "1, 2, 3"
-  \endrst
- */
-template <typename T>
-auto join(std::initializer_list<T> list, string_view sep)
-    -> join_view<const T*, const T*> {
-  return join(std::begin(list), std::end(list), sep);
-}
-
-FMT_END_EXPORT
-FMT_END_NAMESPACE
-
-#endif  // FMT_RANGES_H_
diff --git a/3party/fmt/include/fmt/std.h b/3party/fmt/include/fmt/std.h
deleted file mode 100644
index 7cff115..0000000
--- a/3party/fmt/include/fmt/std.h
+++ /dev/null
@@ -1,537 +0,0 @@
-// Formatting library for C++ - formatters for standard library types
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_STD_H_
-#define FMT_STD_H_
-
-#include <atomic>
-#include <bitset>
-#include <cstdlib>
-#include <exception>
-#include <memory>
-#include <thread>
-#include <type_traits>
-#include <typeinfo>
-#include <utility>
-#include <vector>
-
-#include "format.h"
-#include "ostream.h"
-
-#if FMT_HAS_INCLUDE(<version>)
-#  include <version>
-#endif
-// Checking FMT_CPLUSPLUS for warning suppression in MSVC.
-#if FMT_CPLUSPLUS >= 201703L
-#  if FMT_HAS_INCLUDE(<filesystem>)
-#    include <filesystem>
-#  endif
-#  if FMT_HAS_INCLUDE(<variant>)
-#    include <variant>
-#  endif
-#  if FMT_HAS_INCLUDE(<optional>)
-#    include <optional>
-#  endif
-#endif
-
-#if FMT_CPLUSPLUS > 201703L && FMT_HAS_INCLUDE(<source_location>)
-#  include <source_location>
-#endif
-
-// GCC 4 does not support FMT_HAS_INCLUDE.
-#if FMT_HAS_INCLUDE(<cxxabi.h>) || defined(__GLIBCXX__)
-#  include <cxxabi.h>
-// Android NDK with gabi++ library on some architectures does not implement
-// abi::__cxa_demangle().
-#  ifndef __GABIXX_CXXABI_H__
-#    define FMT_HAS_ABI_CXA_DEMANGLE
-#  endif
-#endif
-
-// Check if typeid is available.
-#ifndef FMT_USE_TYPEID
-// __RTTI is for EDG compilers. In MSVC typeid is available without RTTI.
-#  if defined(__GXX_RTTI) || FMT_HAS_FEATURE(cxx_rtti) || FMT_MSC_VERSION || \
-      defined(__INTEL_RTTI__) || defined(__RTTI)
-#    define FMT_USE_TYPEID 1
-#  else
-#    define FMT_USE_TYPEID 0
-#  endif
-#endif
-
-// For older Xcode versions, __cpp_lib_xxx flags are inaccurately defined.
-#ifndef FMT_CPP_LIB_FILESYSTEM
-#  ifdef __cpp_lib_filesystem
-#    define FMT_CPP_LIB_FILESYSTEM __cpp_lib_filesystem
-#  else
-#    define FMT_CPP_LIB_FILESYSTEM 0
-#  endif
-#endif
-
-#ifndef FMT_CPP_LIB_VARIANT
-#  ifdef __cpp_lib_variant
-#    define FMT_CPP_LIB_VARIANT __cpp_lib_variant
-#  else
-#    define FMT_CPP_LIB_VARIANT 0
-#  endif
-#endif
-
-#if FMT_CPP_LIB_FILESYSTEM
-FMT_BEGIN_NAMESPACE
-
-namespace detail {
-
-template <typename Char, typename PathChar>
-auto get_path_string(const std::filesystem::path& p,
-                     const std::basic_string<PathChar>& native) {
-  if constexpr (std::is_same_v<Char, char> && std::is_same_v<PathChar, wchar_t>)
-    return to_utf8<wchar_t>(native, to_utf8_error_policy::replace);
-  else
-    return p.string<Char>();
-}
-
-template <typename Char, typename PathChar>
-void write_escaped_path(basic_memory_buffer<Char>& quoted,
-                        const std::filesystem::path& p,
-                        const std::basic_string<PathChar>& native) {
-  if constexpr (std::is_same_v<Char, char> &&
-                std::is_same_v<PathChar, wchar_t>) {
-    auto buf = basic_memory_buffer<wchar_t>();
-    write_escaped_string<wchar_t>(std::back_inserter(buf), native);
-    bool valid = to_utf8<wchar_t>::convert(quoted, {buf.data(), buf.size()});
-    FMT_ASSERT(valid, "invalid utf16");
-  } else if constexpr (std::is_same_v<Char, PathChar>) {
-    write_escaped_string<std::filesystem::path::value_type>(
-        std::back_inserter(quoted), native);
-  } else {
-    write_escaped_string<Char>(std::back_inserter(quoted), p.string<Char>());
-  }
-}
-
-}  // namespace detail
-
-FMT_EXPORT
-template <typename Char> struct formatter<std::filesystem::path, Char> {
- private:
-  format_specs<Char> specs_;
-  detail::arg_ref<Char> width_ref_;
-  bool debug_ = false;
-  char path_type_ = 0;
-
- public:
-  FMT_CONSTEXPR void set_debug_format(bool set = true) { debug_ = set; }
-
-  template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
-    auto it = ctx.begin(), end = ctx.end();
-    if (it == end) return it;
-
-    it = detail::parse_align(it, end, specs_);
-    if (it == end) return it;
-
-    it = detail::parse_dynamic_spec(it, end, specs_.width, width_ref_, ctx);
-    if (it != end && *it == '?') {
-      debug_ = true;
-      ++it;
-    }
-    if (it != end && (*it == 'g')) path_type_ = *it++;
-    return it;
-  }
-
-  template <typename FormatContext>
-  auto format(const std::filesystem::path& p, FormatContext& ctx) const {
-    auto specs = specs_;
-#  ifdef _WIN32
-    auto path_string = !path_type_ ? p.native() : p.generic_wstring();
-#  else
-    auto path_string = !path_type_ ? p.native() : p.generic_string();
-#  endif
-
-    detail::handle_dynamic_spec<detail::width_checker>(specs.width, width_ref_,
-                                                       ctx);
-    if (!debug_) {
-      auto s = detail::get_path_string<Char>(p, path_string);
-      return detail::write(ctx.out(), basic_string_view<Char>(s), specs);
-    }
-    auto quoted = basic_memory_buffer<Char>();
-    detail::write_escaped_path(quoted, p, path_string);
-    return detail::write(ctx.out(),
-                         basic_string_view<Char>(quoted.data(), quoted.size()),
-                         specs);
-  }
-};
-FMT_END_NAMESPACE
-#endif  // FMT_CPP_LIB_FILESYSTEM
-
-FMT_BEGIN_NAMESPACE
-FMT_EXPORT
-template <std::size_t N, typename Char>
-struct formatter<std::bitset<N>, Char> : nested_formatter<string_view> {
- private:
-  // Functor because C++11 doesn't support generic lambdas.
-  struct writer {
-    const std::bitset<N>& bs;
-
-    template <typename OutputIt>
-    FMT_CONSTEXPR auto operator()(OutputIt out) -> OutputIt {
-      for (auto pos = N; pos > 0; --pos) {
-        out = detail::write<Char>(out, bs[pos - 1] ? Char('1') : Char('0'));
-      }
-
-      return out;
-    }
-  };
-
- public:
-  template <typename FormatContext>
-  auto format(const std::bitset<N>& bs, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    return write_padded(ctx, writer{bs});
-  }
-};
-
-FMT_EXPORT
-template <typename Char>
-struct formatter<std::thread::id, Char> : basic_ostream_formatter<Char> {};
-FMT_END_NAMESPACE
-
-#ifdef __cpp_lib_optional
-FMT_BEGIN_NAMESPACE
-FMT_EXPORT
-template <typename T, typename Char>
-struct formatter<std::optional<T>, Char,
-                 std::enable_if_t<is_formattable<T, Char>::value>> {
- private:
-  formatter<T, Char> underlying_;
-  static constexpr basic_string_view<Char> optional =
-      detail::string_literal<Char, 'o', 'p', 't', 'i', 'o', 'n', 'a', 'l',
-                             '('>{};
-  static constexpr basic_string_view<Char> none =
-      detail::string_literal<Char, 'n', 'o', 'n', 'e'>{};
-
-  template <class U>
-  FMT_CONSTEXPR static auto maybe_set_debug_format(U& u, bool set)
-      -> decltype(u.set_debug_format(set)) {
-    u.set_debug_format(set);
-  }
-
-  template <class U>
-  FMT_CONSTEXPR static void maybe_set_debug_format(U&, ...) {}
-
- public:
-  template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
-    maybe_set_debug_format(underlying_, true);
-    return underlying_.parse(ctx);
-  }
-
-  template <typename FormatContext>
-  auto format(const std::optional<T>& opt, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    if (!opt) return detail::write<Char>(ctx.out(), none);
-
-    auto out = ctx.out();
-    out = detail::write<Char>(out, optional);
-    ctx.advance_to(out);
-    out = underlying_.format(*opt, ctx);
-    return detail::write(out, ')');
-  }
-};
-FMT_END_NAMESPACE
-#endif  // __cpp_lib_optional
-
-#ifdef __cpp_lib_source_location
-FMT_BEGIN_NAMESPACE
-FMT_EXPORT
-template <> struct formatter<std::source_location> {
-  template <typename ParseContext> FMT_CONSTEXPR auto parse(ParseContext& ctx) {
-    return ctx.begin();
-  }
-
-  template <typename FormatContext>
-  auto format(const std::source_location& loc, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    auto out = ctx.out();
-    out = detail::write(out, loc.file_name());
-    out = detail::write(out, ':');
-    out = detail::write<char>(out, loc.line());
-    out = detail::write(out, ':');
-    out = detail::write<char>(out, loc.column());
-    out = detail::write(out, ": ");
-    out = detail::write(out, loc.function_name());
-    return out;
-  }
-};
-FMT_END_NAMESPACE
-#endif
-
-#if FMT_CPP_LIB_VARIANT
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-template <typename T>
-using variant_index_sequence =
-    std::make_index_sequence<std::variant_size<T>::value>;
-
-template <typename> struct is_variant_like_ : std::false_type {};
-template <typename... Types>
-struct is_variant_like_<std::variant<Types...>> : std::true_type {};
-
-// formattable element check.
-template <typename T, typename C> class is_variant_formattable_ {
-  template <std::size_t... Is>
-  static std::conjunction<
-      is_formattable<std::variant_alternative_t<Is, T>, C>...>
-      check(std::index_sequence<Is...>);
-
- public:
-  static constexpr const bool value =
-      decltype(check(variant_index_sequence<T>{}))::value;
-};
-
-template <typename Char, typename OutputIt, typename T>
-auto write_variant_alternative(OutputIt out, const T& v) -> OutputIt {
-  if constexpr (is_string<T>::value)
-    return write_escaped_string<Char>(out, detail::to_string_view(v));
-  else if constexpr (std::is_same_v<T, Char>)
-    return write_escaped_char(out, v);
-  else
-    return write<Char>(out, v);
-}
-
-}  // namespace detail
-
-template <typename T> struct is_variant_like {
-  static constexpr const bool value = detail::is_variant_like_<T>::value;
-};
-
-template <typename T, typename C> struct is_variant_formattable {
-  static constexpr const bool value =
-      detail::is_variant_formattable_<T, C>::value;
-};
-
-FMT_EXPORT
-template <typename Char> struct formatter<std::monostate, Char> {
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename FormatContext>
-  auto format(const std::monostate&, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    return detail::write<Char>(ctx.out(), "monostate");
-  }
-};
-
-FMT_EXPORT
-template <typename Variant, typename Char>
-struct formatter<
-    Variant, Char,
-    std::enable_if_t<std::conjunction_v<
-        is_variant_like<Variant>, is_variant_formattable<Variant, Char>>>> {
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename FormatContext>
-  auto format(const Variant& value, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    auto out = ctx.out();
-
-    out = detail::write<Char>(out, "variant(");
-    FMT_TRY {
-      std::visit(
-          [&](const auto& v) {
-            out = detail::write_variant_alternative<Char>(out, v);
-          },
-          value);
-    }
-    FMT_CATCH(const std::bad_variant_access&) {
-      detail::write<Char>(out, "valueless by exception");
-    }
-    *out++ = ')';
-    return out;
-  }
-};
-FMT_END_NAMESPACE
-#endif  // FMT_CPP_LIB_VARIANT
-
-FMT_BEGIN_NAMESPACE
-FMT_EXPORT
-template <typename Char> struct formatter<std::error_code, Char> {
-  template <typename ParseContext>
-  FMT_CONSTEXPR auto parse(ParseContext& ctx) -> decltype(ctx.begin()) {
-    return ctx.begin();
-  }
-
-  template <typename FormatContext>
-  FMT_CONSTEXPR auto format(const std::error_code& ec, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    auto out = ctx.out();
-    out = detail::write_bytes(out, ec.category().name(), format_specs<Char>());
-    out = detail::write<Char>(out, Char(':'));
-    out = detail::write<Char>(out, ec.value());
-    return out;
-  }
-};
-
-FMT_EXPORT
-template <typename T, typename Char>
-struct formatter<
-    T, Char,  // DEPRECATED! Mixing code unit types.
-    typename std::enable_if<std::is_base_of<std::exception, T>::value>::type> {
- private:
-  bool with_typename_ = false;
-
- public:
-  FMT_CONSTEXPR auto parse(basic_format_parse_context<Char>& ctx)
-      -> decltype(ctx.begin()) {
-    auto it = ctx.begin();
-    auto end = ctx.end();
-    if (it == end || *it == '}') return it;
-    if (*it == 't') {
-      ++it;
-      with_typename_ = FMT_USE_TYPEID != 0;
-    }
-    return it;
-  }
-
-  template <typename OutputIt>
-  auto format(const std::exception& ex,
-              basic_format_context<OutputIt, Char>& ctx) const -> OutputIt {
-    format_specs<Char> spec;
-    auto out = ctx.out();
-    if (!with_typename_)
-      return detail::write_bytes(out, string_view(ex.what()), spec);
-
-#if FMT_USE_TYPEID
-    const std::type_info& ti = typeid(ex);
-#  ifdef FMT_HAS_ABI_CXA_DEMANGLE
-    int status = 0;
-    std::size_t size = 0;
-    std::unique_ptr<char, void (*)(void*)> demangled_name_ptr(
-        abi::__cxa_demangle(ti.name(), nullptr, &size, &status), &std::free);
-
-    string_view demangled_name_view;
-    if (demangled_name_ptr) {
-      demangled_name_view = demangled_name_ptr.get();
-
-      // Normalization of stdlib inline namespace names.
-      // libc++ inline namespaces.
-      //  std::__1::*       -> std::*
-      //  std::__1::__fs::* -> std::*
-      // libstdc++ inline namespaces.
-      //  std::__cxx11::*             -> std::*
-      //  std::filesystem::__cxx11::* -> std::filesystem::*
-      if (demangled_name_view.starts_with("std::")) {
-        char* begin = demangled_name_ptr.get();
-        char* to = begin + 5;  // std::
-        for (char *from = to, *end = begin + demangled_name_view.size();
-             from < end;) {
-          // This is safe, because demangled_name is NUL-terminated.
-          if (from[0] == '_' && from[1] == '_') {
-            char* next = from + 1;
-            while (next < end && *next != ':') next++;
-            if (next[0] == ':' && next[1] == ':') {
-              from = next + 2;
-              continue;
-            }
-          }
-          *to++ = *from++;
-        }
-        demangled_name_view = {begin, detail::to_unsigned(to - begin)};
-      }
-    } else {
-      demangled_name_view = string_view(ti.name());
-    }
-    out = detail::write_bytes(out, demangled_name_view, spec);
-#  elif FMT_MSC_VERSION
-    string_view demangled_name_view(ti.name());
-    if (demangled_name_view.starts_with("class "))
-      demangled_name_view.remove_prefix(6);
-    else if (demangled_name_view.starts_with("struct "))
-      demangled_name_view.remove_prefix(7);
-    out = detail::write_bytes(out, demangled_name_view, spec);
-#  else
-    out = detail::write_bytes(out, string_view(ti.name()), spec);
-#  endif
-    *out++ = ':';
-    *out++ = ' ';
-    return detail::write_bytes(out, string_view(ex.what()), spec);
-#endif
-  }
-};
-
-namespace detail {
-
-template <typename T, typename Enable = void>
-struct has_flip : std::false_type {};
-
-template <typename T>
-struct has_flip<T, void_t<decltype(std::declval<T>().flip())>>
-    : std::true_type {};
-
-template <typename T> struct is_bit_reference_like {
-  static constexpr const bool value =
-      std::is_convertible<T, bool>::value &&
-      std::is_nothrow_assignable<T, bool>::value && has_flip<T>::value;
-};
-
-#ifdef _LIBCPP_VERSION
-
-// Workaround for libc++ incompatibility with C++ standard.
-// According to the Standard, `bitset::operator[] const` returns bool.
-template <typename C>
-struct is_bit_reference_like<std::__bit_const_reference<C>> {
-  static constexpr const bool value = true;
-};
-
-#endif
-
-}  // namespace detail
-
-// We can't use std::vector<bool, Allocator>::reference and
-// std::bitset<N>::reference because the compiler can't deduce Allocator and N
-// in partial specialization.
-FMT_EXPORT
-template <typename BitRef, typename Char>
-struct formatter<BitRef, Char,
-                 enable_if_t<detail::is_bit_reference_like<BitRef>::value>>
-    : formatter<bool, Char> {
-  template <typename FormatContext>
-  FMT_CONSTEXPR auto format(const BitRef& v, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    return formatter<bool, Char>::format(v, ctx);
-  }
-};
-
-FMT_EXPORT
-template <typename T, typename Char>
-struct formatter<std::atomic<T>, Char,
-                 enable_if_t<is_formattable<T, Char>::value>>
-    : formatter<T, Char> {
-  template <typename FormatContext>
-  auto format(const std::atomic<T>& v, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    return formatter<T, Char>::format(v.load(), ctx);
-  }
-};
-
-#ifdef __cpp_lib_atomic_flag_test
-FMT_EXPORT
-template <typename Char>
-struct formatter<std::atomic_flag, Char> : formatter<bool, Char> {
-  template <typename FormatContext>
-  auto format(const std::atomic_flag& v, FormatContext& ctx) const
-      -> decltype(ctx.out()) {
-    return formatter<bool, Char>::format(v.test(), ctx);
-  }
-};
-#endif  // __cpp_lib_atomic_flag_test
-
-FMT_END_NAMESPACE
-#endif  // FMT_STD_H_
diff --git a/3party/fmt/include/fmt/xchar.h b/3party/fmt/include/fmt/xchar.h
deleted file mode 100644
index f609c5c..0000000
--- a/3party/fmt/include/fmt/xchar.h
+++ /dev/null
@@ -1,259 +0,0 @@
-// Formatting library for C++ - optional wchar_t and exotic character support
-//
-// Copyright (c) 2012 - present, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#ifndef FMT_XCHAR_H_
-#define FMT_XCHAR_H_
-
-#include <cwchar>
-
-#include "format.h"
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-#  include <locale>
-#endif
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-template <typename T>
-using is_exotic_char = bool_constant<!std::is_same<T, char>::value>;
-
-inline auto write_loc(std::back_insert_iterator<detail::buffer<wchar_t>> out,
-                      loc_value value, const format_specs<wchar_t>& specs,
-                      locale_ref loc) -> bool {
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-  auto& numpunct =
-      std::use_facet<std::numpunct<wchar_t>>(loc.get<std::locale>());
-  auto separator = std::wstring();
-  auto grouping = numpunct.grouping();
-  if (!grouping.empty()) separator = std::wstring(1, numpunct.thousands_sep());
-  return value.visit(loc_writer<wchar_t>{out, specs, separator, grouping, {}});
-#endif
-  return false;
-}
-}  // namespace detail
-
-FMT_BEGIN_EXPORT
-
-using wstring_view = basic_string_view<wchar_t>;
-using wformat_parse_context = basic_format_parse_context<wchar_t>;
-using wformat_context = buffer_context<wchar_t>;
-using wformat_args = basic_format_args<wformat_context>;
-using wmemory_buffer = basic_memory_buffer<wchar_t>;
-
-#if FMT_GCC_VERSION && FMT_GCC_VERSION < 409
-// Workaround broken conversion on older gcc.
-template <typename... Args> using wformat_string = wstring_view;
-inline auto runtime(wstring_view s) -> wstring_view { return s; }
-#else
-template <typename... Args>
-using wformat_string = basic_format_string<wchar_t, type_identity_t<Args>...>;
-inline auto runtime(wstring_view s) -> runtime_format_string<wchar_t> {
-  return {{s}};
-}
-#endif
-
-template <> struct is_char<wchar_t> : std::true_type {};
-template <> struct is_char<detail::char8_type> : std::true_type {};
-template <> struct is_char<char16_t> : std::true_type {};
-template <> struct is_char<char32_t> : std::true_type {};
-
-template <typename... T>
-constexpr auto make_wformat_args(const T&... args)
-    -> format_arg_store<wformat_context, T...> {
-  return {args...};
-}
-
-inline namespace literals {
-#if FMT_USE_USER_DEFINED_LITERALS && !FMT_USE_NONTYPE_TEMPLATE_ARGS
-constexpr auto operator""_a(const wchar_t* s, size_t)
-    -> detail::udl_arg<wchar_t> {
-  return {s};
-}
-#endif
-}  // namespace literals
-
-template <typename It, typename Sentinel>
-auto join(It begin, Sentinel end, wstring_view sep)
-    -> join_view<It, Sentinel, wchar_t> {
-  return {begin, end, sep};
-}
-
-template <typename Range>
-auto join(Range&& range, wstring_view sep)
-    -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>,
-                 wchar_t> {
-  return join(std::begin(range), std::end(range), sep);
-}
-
-template <typename T>
-auto join(std::initializer_list<T> list, wstring_view sep)
-    -> join_view<const T*, const T*, wchar_t> {
-  return join(std::begin(list), std::end(list), sep);
-}
-
-template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>
-auto vformat(basic_string_view<Char> format_str,
-             basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> std::basic_string<Char> {
-  auto buf = basic_memory_buffer<Char>();
-  detail::vformat_to(buf, format_str, args);
-  return to_string(buf);
-}
-
-template <typename... T>
-auto format(wformat_string<T...> fmt, T&&... args) -> std::wstring {
-  return vformat(fmt::wstring_view(fmt), fmt::make_wformat_args(args...));
-}
-
-// Pass char_t as a default template parameter instead of using
-// std::basic_string<char_t<S>> to reduce the symbol size.
-template <typename S, typename... T, typename Char = char_t<S>,
-          FMT_ENABLE_IF(!std::is_same<Char, char>::value &&
-                        !std::is_same<Char, wchar_t>::value)>
-auto format(const S& format_str, T&&... args) -> std::basic_string<Char> {
-  return vformat(detail::to_string_view(format_str),
-                 fmt::make_format_args<buffer_context<Char>>(args...));
-}
-
-template <typename Locale, typename S, typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
-                            detail::is_exotic_char<Char>::value)>
-inline auto vformat(
-    const Locale& loc, const S& format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> std::basic_string<Char> {
-  return detail::vformat(loc, detail::to_string_view(format_str), args);
-}
-
-template <typename Locale, typename S, typename... T, typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_locale<Locale>::value&&
-                            detail::is_exotic_char<Char>::value)>
-inline auto format(const Locale& loc, const S& format_str, T&&... args)
-    -> std::basic_string<Char> {
-  return detail::vformat(loc, detail::to_string_view(format_str),
-                         fmt::make_format_args<buffer_context<Char>>(args...));
-}
-
-template <typename OutputIt, typename S, typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
-                            detail::is_exotic_char<Char>::value)>
-auto vformat_to(OutputIt out, const S& format_str,
-                basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> OutputIt {
-  auto&& buf = detail::get_buffer<Char>(out);
-  detail::vformat_to(buf, detail::to_string_view(format_str), args);
-  return detail::get_iterator(buf, out);
-}
-
-template <typename OutputIt, typename S, typename... T,
-          typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
-                            detail::is_exotic_char<Char>::value)>
-inline auto format_to(OutputIt out, const S& fmt, T&&... args) -> OutputIt {
-  return vformat_to(out, detail::to_string_view(fmt),
-                    fmt::make_format_args<buffer_context<Char>>(args...));
-}
-
-template <typename Locale, typename S, typename OutputIt, typename... Args,
-          typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
-                            detail::is_locale<Locale>::value&&
-                                detail::is_exotic_char<Char>::value)>
-inline auto vformat_to(
-    OutputIt out, const Locale& loc, const S& format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args) -> OutputIt {
-  auto&& buf = detail::get_buffer<Char>(out);
-  vformat_to(buf, detail::to_string_view(format_str), args,
-             detail::locale_ref(loc));
-  return detail::get_iterator(buf, out);
-}
-
-template <typename OutputIt, typename Locale, typename S, typename... T,
-          typename Char = char_t<S>,
-          bool enable = detail::is_output_iterator<OutputIt, Char>::value &&
-                        detail::is_locale<Locale>::value &&
-                        detail::is_exotic_char<Char>::value>
-inline auto format_to(OutputIt out, const Locale& loc, const S& format_str,
-                      T&&... args) ->
-    typename std::enable_if<enable, OutputIt>::type {
-  return vformat_to(out, loc, detail::to_string_view(format_str),
-                    fmt::make_format_args<buffer_context<Char>>(args...));
-}
-
-template <typename OutputIt, typename Char, typename... Args,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
-                            detail::is_exotic_char<Char>::value)>
-inline auto vformat_to_n(
-    OutputIt out, size_t n, basic_string_view<Char> format_str,
-    basic_format_args<buffer_context<type_identity_t<Char>>> args)
-    -> format_to_n_result<OutputIt> {
-  using traits = detail::fixed_buffer_traits;
-  auto buf = detail::iterator_buffer<OutputIt, Char, traits>(out, n);
-  detail::vformat_to(buf, format_str, args);
-  return {buf.out(), buf.count()};
-}
-
-template <typename OutputIt, typename S, typename... T,
-          typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&&
-                            detail::is_exotic_char<Char>::value)>
-inline auto format_to_n(OutputIt out, size_t n, const S& fmt, T&&... args)
-    -> format_to_n_result<OutputIt> {
-  return vformat_to_n(out, n, detail::to_string_view(fmt),
-                      fmt::make_format_args<buffer_context<Char>>(args...));
-}
-
-template <typename S, typename... T, typename Char = char_t<S>,
-          FMT_ENABLE_IF(detail::is_exotic_char<Char>::value)>
-inline auto formatted_size(const S& fmt, T&&... args) -> size_t {
-  auto buf = detail::counting_buffer<Char>();
-  detail::vformat_to(buf, detail::to_string_view(fmt),
-                     fmt::make_format_args<buffer_context<Char>>(args...));
-  return buf.count();
-}
-
-inline void vprint(std::FILE* f, wstring_view fmt, wformat_args args) {
-  auto buf = wmemory_buffer();
-  detail::vformat_to(buf, fmt, args);
-  buf.push_back(L'\0');
-  if (std::fputws(buf.data(), f) == -1)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
-}
-
-inline void vprint(wstring_view fmt, wformat_args args) {
-  vprint(stdout, fmt, args);
-}
-
-template <typename... T>
-void print(std::FILE* f, wformat_string<T...> fmt, T&&... args) {
-  return vprint(f, wstring_view(fmt), fmt::make_wformat_args(args...));
-}
-
-template <typename... T> void print(wformat_string<T...> fmt, T&&... args) {
-  return vprint(wstring_view(fmt), fmt::make_wformat_args(args...));
-}
-
-template <typename... T>
-void println(std::FILE* f, wformat_string<T...> fmt, T&&... args) {
-  return print(f, L"{}\n", fmt::format(fmt, std::forward<T>(args)...));
-}
-
-template <typename... T> void println(wformat_string<T...> fmt, T&&... args) {
-  return print(L"{}\n", fmt::format(fmt, std::forward<T>(args)...));
-}
-
-/**
-  Converts *value* to ``std::wstring`` using the default format for type *T*.
- */
-template <typename T> inline auto to_wstring(const T& value) -> std::wstring {
-  return format(FMT_STRING(L"{}"), value);
-}
-FMT_END_EXPORT
-FMT_END_NAMESPACE
-
-#endif  // FMT_XCHAR_H_
diff --git a/3party/fmt/src/fmt.cc b/3party/fmt/src/fmt.cc
deleted file mode 100644
index 5330463..0000000
--- a/3party/fmt/src/fmt.cc
+++ /dev/null
@@ -1,108 +0,0 @@
-module;
-
-// Put all implementation-provided headers into the global module fragment
-// to prevent attachment to this module.
-#include <algorithm>
-#include <cerrno>
-#include <chrono>
-#include <climits>
-#include <cmath>
-#include <cstddef>
-#include <cstdint>
-#include <cstdio>
-#include <cstdlib>
-#include <cstring>
-#include <ctime>
-#include <exception>
-#include <filesystem>
-#include <fstream>
-#include <functional>
-#include <iterator>
-#include <limits>
-#include <locale>
-#include <memory>
-#include <optional>
-#include <ostream>
-#include <stdexcept>
-#include <string>
-#include <string_view>
-#include <system_error>
-#include <thread>
-#include <type_traits>
-#include <typeinfo>
-#include <utility>
-#include <variant>
-#include <vector>
-#include <version>
-
-#if __has_include(<cxxabi.h>)
-#  include <cxxabi.h>
-#endif
-#if defined(_MSC_VER) || defined(__MINGW32__)
-#  include <intrin.h>
-#endif
-#if defined __APPLE__ || defined(__FreeBSD__)
-#  include <xlocale.h>
-#endif
-#if __has_include(<winapifamily.h>)
-#  include <winapifamily.h>
-#endif
-#if (__has_include(<fcntl.h>) || defined(__APPLE__) || \
-     defined(__linux__)) &&                            \
-    (!defined(WINAPI_FAMILY) || (WINAPI_FAMILY == WINAPI_FAMILY_DESKTOP_APP))
-#  include <fcntl.h>
-#  include <sys/stat.h>
-#  include <sys/types.h>
-#  ifndef _WIN32
-#    include <unistd.h>
-#  else
-#    include <io.h>
-#  endif
-#endif
-#ifdef _WIN32
-#  if defined(__GLIBCXX__)
-#    include <ext/stdio_filebuf.h>
-#    include <ext/stdio_sync_filebuf.h>
-#  endif
-#  define WIN32_LEAN_AND_MEAN
-#  include <windows.h>
-#endif
-
-export module fmt;
-
-#define FMT_EXPORT export
-#define FMT_BEGIN_EXPORT export {
-#define FMT_END_EXPORT }
-
-// If you define FMT_ATTACH_TO_GLOBAL_MODULE
-//  - all declarations are detached from module 'fmt'
-//  - the module behaves like a traditional static library, too
-//  - all library symbols are mangled traditionally
-//  - you can mix TUs with either importing or #including the {fmt} API
-#ifdef FMT_ATTACH_TO_GLOBAL_MODULE
-extern "C++" {
-#endif
-
-// All library-provided declarations and definitions must be in the module
-// purview to be exported.
-#include "fmt/args.h"
-#include "fmt/chrono.h"
-#include "fmt/color.h"
-#include "fmt/compile.h"
-#include "fmt/format.h"
-#include "fmt/os.h"
-#include "fmt/printf.h"
-#include "fmt/std.h"
-#include "fmt/xchar.h"
-
-#ifdef FMT_ATTACH_TO_GLOBAL_MODULE
-}
-#endif
-
-// gcc doesn't yet implement private module fragments
-#if !FMT_GCC_VERSION
-module :private;
-#endif
-
-#include "format.cc"
-#include "os.cc"
diff --git a/3party/fmt/src/format.cc b/3party/fmt/src/format.cc
deleted file mode 100644
index 391d3a2..0000000
--- a/3party/fmt/src/format.cc
+++ /dev/null
@@ -1,43 +0,0 @@
-// Formatting library for C++
-//
-// Copyright (c) 2012 - 2016, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-#include "fmt/format-inl.h"
-
-FMT_BEGIN_NAMESPACE
-namespace detail {
-
-template FMT_API auto dragonbox::to_decimal(float x) noexcept
-    -> dragonbox::decimal_fp<float>;
-template FMT_API auto dragonbox::to_decimal(double x) noexcept
-    -> dragonbox::decimal_fp<double>;
-
-#ifndef FMT_STATIC_THOUSANDS_SEPARATOR
-template FMT_API locale_ref::locale_ref(const std::locale& loc);
-template FMT_API auto locale_ref::get<std::locale>() const -> std::locale;
-#endif
-
-// Explicit instantiations for char.
-
-template FMT_API auto thousands_sep_impl(locale_ref)
-    -> thousands_sep_result<char>;
-template FMT_API auto decimal_point_impl(locale_ref) -> char;
-
-template FMT_API void buffer<char>::append(const char*, const char*);
-
-template FMT_API void vformat_to(buffer<char>&, string_view,
-                                 typename vformat_args<>::type, locale_ref);
-
-// Explicit instantiations for wchar_t.
-
-template FMT_API auto thousands_sep_impl(locale_ref)
-    -> thousands_sep_result<wchar_t>;
-template FMT_API auto decimal_point_impl(locale_ref) -> wchar_t;
-
-template FMT_API void buffer<wchar_t>::append(const wchar_t*, const wchar_t*);
-
-}  // namespace detail
-FMT_END_NAMESPACE
diff --git a/3party/fmt/src/os.cc b/3party/fmt/src/os.cc
deleted file mode 100644
index a639e78..0000000
--- a/3party/fmt/src/os.cc
+++ /dev/null
@@ -1,402 +0,0 @@
-// Formatting library for C++ - optional OS-specific functionality
-//
-// Copyright (c) 2012 - 2016, Victor Zverovich
-// All rights reserved.
-//
-// For the license information refer to format.h.
-
-// Disable bogus MSVC warnings.
-#if !defined(_CRT_SECURE_NO_WARNINGS) && defined(_MSC_VER)
-#  define _CRT_SECURE_NO_WARNINGS
-#endif
-
-#include "fmt/os.h"
-
-#include <climits>
-
-#if FMT_USE_FCNTL
-#  include <sys/stat.h>
-#  include <sys/types.h>
-
-#  ifdef _WRS_KERNEL    // VxWorks7 kernel
-#    include <ioLib.h>  // getpagesize
-#  endif
-
-#  ifndef _WIN32
-#    include <unistd.h>
-#  else
-#    ifndef WIN32_LEAN_AND_MEAN
-#      define WIN32_LEAN_AND_MEAN
-#    endif
-#    include <io.h>
-
-#    ifndef S_IRUSR
-#      define S_IRUSR _S_IREAD
-#    endif
-#    ifndef S_IWUSR
-#      define S_IWUSR _S_IWRITE
-#    endif
-#    ifndef S_IRGRP
-#      define S_IRGRP 0
-#    endif
-#    ifndef S_IWGRP
-#      define S_IWGRP 0
-#    endif
-#    ifndef S_IROTH
-#      define S_IROTH 0
-#    endif
-#    ifndef S_IWOTH
-#      define S_IWOTH 0
-#    endif
-#  endif  // _WIN32
-#endif    // FMT_USE_FCNTL
-
-#ifdef _WIN32
-#  include <windows.h>
-#endif
-
-namespace {
-#ifdef _WIN32
-// Return type of read and write functions.
-using rwresult = int;
-
-// On Windows the count argument to read and write is unsigned, so convert
-// it from size_t preventing integer overflow.
-inline unsigned convert_rwcount(std::size_t count) {
-  return count <= UINT_MAX ? static_cast<unsigned>(count) : UINT_MAX;
-}
-#elif FMT_USE_FCNTL
-// Return type of read and write functions.
-using rwresult = ssize_t;
-
-inline std::size_t convert_rwcount(std::size_t count) { return count; }
-#endif
-}  // namespace
-
-FMT_BEGIN_NAMESPACE
-
-#ifdef _WIN32
-namespace detail {
-
-class system_message {
-  system_message(const system_message&) = delete;
-  void operator=(const system_message&) = delete;
-
-  unsigned long result_;
-  wchar_t* message_;
-
-  static bool is_whitespace(wchar_t c) noexcept {
-    return c == L' ' || c == L'\n' || c == L'\r' || c == L'\t' || c == L'\0';
-  }
-
- public:
-  explicit system_message(unsigned long error_code)
-      : result_(0), message_(nullptr) {
-    result_ = FormatMessageW(
-        FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM |
-            FORMAT_MESSAGE_IGNORE_INSERTS,
-        nullptr, error_code, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT),
-        reinterpret_cast<wchar_t*>(&message_), 0, nullptr);
-    if (result_ != 0) {
-      while (result_ != 0 && is_whitespace(message_[result_ - 1])) {
-        --result_;
-      }
-    }
-  }
-  ~system_message() { LocalFree(message_); }
-  explicit operator bool() const noexcept { return result_ != 0; }
-  operator basic_string_view<wchar_t>() const noexcept {
-    return basic_string_view<wchar_t>(message_, result_);
-  }
-};
-
-class utf8_system_category final : public std::error_category {
- public:
-  const char* name() const noexcept override { return "system"; }
-  std::string message(int error_code) const override {
-    auto&& msg = system_message(error_code);
-    if (msg) {
-      auto utf8_message = to_utf8<wchar_t>();
-      if (utf8_message.convert(msg)) {
-        return utf8_message.str();
-      }
-    }
-    return "unknown error";
-  }
-};
-
-}  // namespace detail
-
-FMT_API const std::error_category& system_category() noexcept {
-  static const detail::utf8_system_category category;
-  return category;
-}
-
-std::system_error vwindows_error(int err_code, string_view format_str,
-                                 format_args args) {
-  auto ec = std::error_code(err_code, system_category());
-  return std::system_error(ec, vformat(format_str, args));
-}
-
-void detail::format_windows_error(detail::buffer<char>& out, int error_code,
-                                  const char* message) noexcept {
-  FMT_TRY {
-    auto&& msg = system_message(error_code);
-    if (msg) {
-      auto utf8_message = to_utf8<wchar_t>();
-      if (utf8_message.convert(msg)) {
-        fmt::format_to(appender(out), FMT_STRING("{}: {}"), message,
-                       string_view(utf8_message));
-        return;
-      }
-    }
-  }
-  FMT_CATCH(...) {}
-  format_error_code(out, error_code, message);
-}
-
-void report_windows_error(int error_code, const char* message) noexcept {
-  report_error(detail::format_windows_error, error_code, message);
-}
-#endif  // _WIN32
-
-buffered_file::~buffered_file() noexcept {
-  if (file_ && FMT_SYSTEM(fclose(file_)) != 0)
-    report_system_error(errno, "cannot close file");
-}
-
-buffered_file::buffered_file(cstring_view filename, cstring_view mode) {
-  FMT_RETRY_VAL(file_, FMT_SYSTEM(fopen(filename.c_str(), mode.c_str())),
-                nullptr);
-  if (!file_)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot open file {}"),
-                           filename.c_str()));
-}
-
-void buffered_file::close() {
-  if (!file_) return;
-  int result = FMT_SYSTEM(fclose(file_));
-  file_ = nullptr;
-  if (result != 0)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot close file")));
-}
-
-int buffered_file::descriptor() const {
-#if !defined(fileno)
-  int fd = FMT_POSIX_CALL(fileno(file_));
-#elif defined(FMT_HAS_SYSTEM)
-  // fileno is a macro on OpenBSD so we cannot use FMT_POSIX_CALL.
-#  define FMT_DISABLE_MACRO
-  int fd = FMT_SYSTEM(fileno FMT_DISABLE_MACRO(file_));
-#else
-  int fd = fileno(file_);
-#endif
-  if (fd == -1)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot get file descriptor")));
-  return fd;
-}
-
-#if FMT_USE_FCNTL
-#  ifdef _WIN32
-using mode_t = int;
-#  endif
-constexpr mode_t default_open_mode =
-    S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
-
-file::file(cstring_view path, int oflag) {
-#  if defined(_WIN32) && !defined(__MINGW32__)
-  fd_ = -1;
-  auto converted = detail::utf8_to_utf16(string_view(path.c_str()));
-  *this = file::open_windows_file(converted.c_str(), oflag);
-#  else
-  FMT_RETRY(fd_, FMT_POSIX_CALL(open(path.c_str(), oflag, default_open_mode)));
-  if (fd_ == -1)
-    FMT_THROW(
-        system_error(errno, FMT_STRING("cannot open file {}"), path.c_str()));
-#  endif
-}
-
-file::~file() noexcept {
-  // Don't retry close in case of EINTR!
-  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
-  if (fd_ != -1 && FMT_POSIX_CALL(close(fd_)) != 0)
-    report_system_error(errno, "cannot close file");
-}
-
-void file::close() {
-  if (fd_ == -1) return;
-  // Don't retry close in case of EINTR!
-  // See http://linux.derkeiler.com/Mailing-Lists/Kernel/2005-09/3000.html
-  int result = FMT_POSIX_CALL(close(fd_));
-  fd_ = -1;
-  if (result != 0)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot close file")));
-}
-
-long long file::size() const {
-#  ifdef _WIN32
-  // Use GetFileSize instead of GetFileSizeEx for the case when _WIN32_WINNT
-  // is less than 0x0500 as is the case with some default MinGW builds.
-  // Both functions support large file sizes.
-  DWORD size_upper = 0;
-  HANDLE handle = reinterpret_cast<HANDLE>(_get_osfhandle(fd_));
-  DWORD size_lower = FMT_SYSTEM(GetFileSize(handle, &size_upper));
-  if (size_lower == INVALID_FILE_SIZE) {
-    DWORD error = GetLastError();
-    if (error != NO_ERROR)
-      FMT_THROW(windows_error(GetLastError(), "cannot get file size"));
-  }
-  unsigned long long long_size = size_upper;
-  return (long_size << sizeof(DWORD) * CHAR_BIT) | size_lower;
-#  else
-  using Stat = struct stat;
-  Stat file_stat = Stat();
-  if (FMT_POSIX_CALL(fstat(fd_, &file_stat)) == -1)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot get file attributes")));
-  static_assert(sizeof(long long) >= sizeof(file_stat.st_size),
-                "return type of file::size is not large enough");
-  return file_stat.st_size;
-#  endif
-}
-
-std::size_t file::read(void* buffer, std::size_t count) {
-  rwresult result = 0;
-  FMT_RETRY(result, FMT_POSIX_CALL(read(fd_, buffer, convert_rwcount(count))));
-  if (result < 0)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot read from file")));
-  return detail::to_unsigned(result);
-}
-
-std::size_t file::write(const void* buffer, std::size_t count) {
-  rwresult result = 0;
-  FMT_RETRY(result, FMT_POSIX_CALL(write(fd_, buffer, convert_rwcount(count))));
-  if (result < 0)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot write to file")));
-  return detail::to_unsigned(result);
-}
-
-file file::dup(int fd) {
-  // Don't retry as dup doesn't return EINTR.
-  // http://pubs.opengroup.org/onlinepubs/009695399/functions/dup.html
-  int new_fd = FMT_POSIX_CALL(dup(fd));
-  if (new_fd == -1)
-    FMT_THROW(system_error(
-        errno, FMT_STRING("cannot duplicate file descriptor {}"), fd));
-  return file(new_fd);
-}
-
-void file::dup2(int fd) {
-  int result = 0;
-  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
-  if (result == -1) {
-    FMT_THROW(system_error(
-        errno, FMT_STRING("cannot duplicate file descriptor {} to {}"), fd_,
-        fd));
-  }
-}
-
-void file::dup2(int fd, std::error_code& ec) noexcept {
-  int result = 0;
-  FMT_RETRY(result, FMT_POSIX_CALL(dup2(fd_, fd)));
-  if (result == -1) ec = std::error_code(errno, std::generic_category());
-}
-
-void file::pipe(file& read_end, file& write_end) {
-  // Close the descriptors first to make sure that assignments don't throw
-  // and there are no leaks.
-  read_end.close();
-  write_end.close();
-  int fds[2] = {};
-#  ifdef _WIN32
-  // Make the default pipe capacity same as on Linux 2.6.11+.
-  enum { DEFAULT_CAPACITY = 65536 };
-  int result = FMT_POSIX_CALL(pipe(fds, DEFAULT_CAPACITY, _O_BINARY));
-#  else
-  // Don't retry as the pipe function doesn't return EINTR.
-  // http://pubs.opengroup.org/onlinepubs/009696799/functions/pipe.html
-  int result = FMT_POSIX_CALL(pipe(fds));
-#  endif
-  if (result != 0)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot create pipe")));
-  // The following assignments don't throw because read_fd and write_fd
-  // are closed.
-  read_end = file(fds[0]);
-  write_end = file(fds[1]);
-}
-
-buffered_file file::fdopen(const char* mode) {
-// Don't retry as fdopen doesn't return EINTR.
-#  if defined(__MINGW32__) && defined(_POSIX_)
-  FILE* f = ::fdopen(fd_, mode);
-#  else
-  FILE* f = FMT_POSIX_CALL(fdopen(fd_, mode));
-#  endif
-  if (!f) {
-    FMT_THROW(system_error(
-        errno, FMT_STRING("cannot associate stream with file descriptor")));
-  }
-  buffered_file bf(f);
-  fd_ = -1;
-  return bf;
-}
-
-#  if defined(_WIN32) && !defined(__MINGW32__)
-file file::open_windows_file(wcstring_view path, int oflag) {
-  int fd = -1;
-  auto err = _wsopen_s(&fd, path.c_str(), oflag, _SH_DENYNO, default_open_mode);
-  if (fd == -1) {
-    FMT_THROW(system_error(err, FMT_STRING("cannot open file {}"),
-                           detail::to_utf8<wchar_t>(path.c_str()).c_str()));
-  }
-  return file(fd);
-}
-#  endif
-
-#  if !defined(__MSDOS__)
-long getpagesize() {
-#    ifdef _WIN32
-  SYSTEM_INFO si;
-  GetSystemInfo(&si);
-  return si.dwPageSize;
-#    else
-#      ifdef _WRS_KERNEL
-  long size = FMT_POSIX_CALL(getpagesize());
-#      else
-  long size = FMT_POSIX_CALL(sysconf(_SC_PAGESIZE));
-#      endif
-
-  if (size < 0)
-    FMT_THROW(system_error(errno, FMT_STRING("cannot get memory page size")));
-  return size;
-#    endif
-}
-#  endif
-
-namespace detail {
-
-void file_buffer::grow(size_t) {
-  if (this->size() == this->capacity()) flush();
-}
-
-file_buffer::file_buffer(cstring_view path,
-                         const detail::ostream_params& params)
-    : file_(path, params.oflag) {
-  set(new char[params.buffer_size], params.buffer_size);
-}
-
-file_buffer::file_buffer(file_buffer&& other)
-    : detail::buffer<char>(other.data(), other.size(), other.capacity()),
-      file_(std::move(other.file_)) {
-  other.clear();
-  other.set(nullptr, 0);
-}
-
-file_buffer::~file_buffer() {
-  flush();
-  delete[] data();
-}
-}  // namespace detail
-
-ostream::~ostream() = default;
-#endif  // FMT_USE_FCNTL
-FMT_END_NAMESPACE
diff --git a/3party/fmt/support/AndroidManifest.xml b/3party/fmt/support/AndroidManifest.xml
deleted file mode 100644
index c282ef5..0000000
--- a/3party/fmt/support/AndroidManifest.xml
+++ /dev/null
@@ -1 +0,0 @@
-<manifest package="dev.fmt" />
diff --git a/3party/fmt/support/C++.sublime-syntax b/3party/fmt/support/C++.sublime-syntax
deleted file mode 100644
index 9dfb5cb..0000000
--- a/3party/fmt/support/C++.sublime-syntax
+++ /dev/null
@@ -1,2061 +0,0 @@
-%YAML 1.2
----
-# http://www.sublimetext.com/docs/3/syntax.html
-name: C++ (fmt)
-comment: I don't think anyone uses .hp. .cp tends to be paired with .h. (I could be wrong. :) -- chris
-file_extensions:
-  - cpp
-  - cc
-  - cp
-  - cxx
-  - c++
-  - C
-  - h
-  - hh
-  - hpp
-  - hxx
-  - h++
-  - inl
-  - ipp
-first_line_match: '-\*- C\+\+ -\*-'
-scope: source.c++
-variables:
-  identifier: \b[[:alpha:]_][[:alnum:]_]*\b # upper and lowercase
-  macro_identifier: \b[[:upper:]_][[:upper:][:digit:]_]{2,}\b # only uppercase, at least 3 chars
-  path_lookahead: '(?:::\s*)?(?:{{identifier}}\s*::\s*)*(?:template\s+)?{{identifier}}'
-  operator_method_name: '\boperator\s*(?:[-+*/%^&|~!=<>]|[-+*/%^&|=!<>]=|<<=?|>>=?|&&|\|\||\+\+|--|,|->\*?|\(\)|\[\]|""\s*{{identifier}})'
-  casts: 'const_cast|dynamic_cast|reinterpret_cast|static_cast'
-  operator_keywords: 'and|and_eq|bitand|bitor|compl|not|not_eq|or|or_eq|xor|xor_eq|noexcept'
-  control_keywords: 'break|case|catch|continue|default|do|else|for|goto|if|_Pragma|return|switch|throw|try|while'
-  memory_operators: 'new|delete'
-  basic_types: 'asm|__asm__|auto|bool|_Bool|char|_Complex|double|float|_Imaginary|int|long|short|signed|unsigned|void'
-  before_tag: 'struct|union|enum\s+class|enum\s+struct|enum|class'
-  declspec: '__declspec\(\s*\w+(?:\([^)]+\))?\s*\)'
-  storage_classes: 'static|export|extern|friend|explicit|virtual|register|thread_local'
-  type_qualifier: 'const|constexpr|mutable|typename|volatile'
-  compiler_directive: 'inline|restrict|__restrict__|__restrict'
-  visibility_modifiers: 'private|protected|public'
-  other_keywords: 'typedef|nullptr|{{visibility_modifiers}}|static_assert|sizeof|using|typeid|alignof|alignas|namespace|template'
-  modifiers: '{{storage_classes}}|{{type_qualifier}}|{{compiler_directive}}'
-  non_angle_brackets: '(?=<<|<=)'
-
-  regular: '[^(){}&;*^%=<>-]*'
-  paren_open: (?:\(
-  paren_close: '\))?'
-  generic_open: (?:<
-  generic_close: '>)?'
-  balance_parentheses: '{{regular}}{{paren_open}}{{regular}}{{paren_close}}{{regular}}'
-  generic_lookahead: <{{regular}}{{generic_open}}{{regular}}{{generic_open}}{{regular}}{{generic_close}}\s*{{generic_close}}{{balance_parentheses}}>
-
-  data_structures_forward_decl_lookahead: '(\s+{{macro_identifier}})*\s*(:\s*({{path_lookahead}}|{{visibility_modifiers}}|,|\s|<[^;]*>)+)?;'
-  non_func_keywords: 'if|for|switch|while|decltype|sizeof|__declspec|__attribute__|typeid|alignof|alignas|static_assert'
-
-  format_spec: |-
-    (?x:
-      (?:.? [<>=^])?     # fill align
-      [ +-]?             # sign
-      \#?                # alternate form
-      # technically, octal and hexadecimal integers are also supported as 'width', but rarely used
-      \d*                # width
-      ,?                 # thousands separator
-      (?:\.\d+)?         # precision
-      [bcdeEfFgGnosxX%]? # type
-    )
-
-contexts:
-  main:
-    - include: preprocessor-global
-    - include: global
-
-  #############################################################################
-  # Reusable contexts
-  #
-  # The follow contexts are currently constructed to be reused in the
-  # Objetive-C++ syntax. They are specifically constructed to not push into
-  # sub-contexts, which ensures that Objective-C++ code isn't accidentally
-  # lexed as plain C++.
-  #
-  # The "unique-*" contexts are additions that C++ makes over C, and thus can
-  # be directly reused in Objective-C++ along with contexts from Objective-C
-  # and C.
-  #############################################################################
-
-  unique-late-expressions:
-    # This is highlighted after all of the other control keywords
-    # to allow operator overloading to be lexed properly
-    - match: \boperator\b
-      scope: keyword.control.c++
-
-  unique-modifiers:
-    - match: \b({{modifiers}})\b
-      scope: storage.modifier.c++
-
-  unique-variables:
-    - match: \bthis\b
-      scope: variable.language.c++
-    # common C++ instance var naming idiom -- fMemberName
-    - match: '\b(f|m)[[:upper:]]\w*\b'
-      scope: variable.other.readwrite.member.c++
-    # common C++ instance var naming idiom -- m_member_name
-    - match: '\bm_[[:alnum:]_]+\b'
-      scope: variable.other.readwrite.member.c++
-
-  unique-constants:
-    - match: \bnullptr\b
-      scope: constant.language.c++
-
-  unique-keywords:
-    - match: \busing\b
-      scope: keyword.control.c++
-    - match: \bbreak\b
-      scope: keyword.control.flow.break.c++
-    - match: \bcontinue\b
-      scope: keyword.control.flow.continue.c++
-    - match: \bgoto\b
-      scope: keyword.control.flow.goto.c++
-    - match: \breturn\b
-      scope: keyword.control.flow.return.c++
-    - match: \bthrow\b
-      scope: keyword.control.flow.throw.c++
-    - match: \b({{control_keywords}})\b
-      scope: keyword.control.c++
-    - match: '\bdelete\b(\s*\[\])?|\bnew\b(?!])'
-      scope: keyword.control.c++
-    - match: \b({{operator_keywords}})\b
-      scope: keyword.operator.word.c++
-
-  unique-types:
-    - match: \b(char16_t|char32_t|wchar_t|nullptr_t)\b
-      scope: storage.type.c++
-    - match: \bclass\b
-      scope: storage.type.c++
-
-  unique-strings:
-    - match: '((?:L|u8|u|U)?R)("([^\(\)\\ ]{0,16})\()'
-      captures:
-        1: storage.type.string.c++
-        2: punctuation.definition.string.begin.c++
-      push:
-        - meta_scope: string.quoted.double.c++
-        - match: '\)\3"'
-          scope: punctuation.definition.string.end.c++
-          pop: true
-        - match: '\{\{|\}\}'
-          scope: constant.character.escape.c++
-        - include: formatting-syntax
-
-  unique-numbers:
-    - match: |-
-        (?x)
-        (?:
-        # floats
-          (?:
-          (?:\b\d(?:[\d']*\d)?\.\d(?:[\d']*\d)?|\B\.\d(?:[\d']*\d)?)(?:[Ee][+-]?\d(?:[\d']*\d)?)?(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))?\b
-          |
-          (?:\b\d(?:[\d']*\d)?\.)(?:\B|(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))\b|(?:[Ee][+-]?\d(?:[\d']*\d)?)(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))?\b)
-          |
-          \b\d(?:[\d']*\d)?(?:[Ee][+-]?\d(?:[\d']*\d)?)(?:[fFlL]|(?:i[fl]?|h|min|[mun]?s|_\w*))?\b
-          )
-        |
-        # ints
-          \b(?:
-          (?:
-          # dec
-          [1-9](?:[\d']*\d)?
-          |
-          # oct
-          0(?:[0-7']*[0-7])?
-          |
-          # hex
-          0[Xx][\da-fA-F](?:[\da-fA-F']*[\da-fA-F])?
-          |
-          # bin
-          0[Bb][01](?:[01']*[01])?
-          )
-          # int suffixes
-          (?:(?:l{1,2}|L{1,2})[uU]?|[uU](?:l{0,2}|L{0,2})|(?:i[fl]?|h|min|[mun]?s|_\w*))?)\b
-        )
-        (?!\.) # Number must not be followed by a decimal point
-      scope: constant.numeric.c++
-
-  identifiers:
-    - match: '{{identifier}}\s*(::)\s*'
-      captures:
-        1: punctuation.accessor.c++
-    - match: '(?:(::)\s*)?{{identifier}}'
-      captures:
-        1: punctuation.accessor.c++
-
-  function-specifiers:
-    - match: \b(const|final|noexcept|override)\b
-      scope: storage.modifier.c++
-
-  #############################################################################
-  # The following are C++-specific contexts that should not be reused. This is
-  # because they push into subcontexts and use variables that are C++-specific.
-  #############################################################################
-
-  ## Common context layout
-
-  global:
-    - match: '(?=\btemplate\b)'
-      push:
-        - include: template
-        - match: (?=\S)
-          set: global-modifier
-    - include: namespace
-    - include: keywords-angle-brackets
-    - match: '(?={{path_lookahead}}\s*<)'
-      push: global-modifier
-    # Take care of comments just before a function definition.
-    - match: /\*
-      scope: punctuation.definition.comment.c
-      push:
-        - - match: \s*(?=\w)
-            set: global-modifier
-          - match: ""
-            pop: true
-        - - meta_scope: comment.block.c
-          - match: \*/
-            scope: punctuation.definition.comment.c
-            pop: true
-    - include: early-expressions
-    - match: ^\s*\b(extern)(?=\s+"C(\+\+)?")
-      scope: storage.modifier.c++
-      push:
-        - include: comments
-        - include: strings
-        - match: '\{'
-          scope: punctuation.section.block.begin.c++
-          set:
-            - meta_scope: meta.extern-c.c++
-            - match: '^\s*(#\s*ifdef)\s*__cplusplus\s*'
-              scope: meta.preprocessor.c++
-              captures:
-                1: keyword.control.import.c++
-              set:
-                - match: '\}'
-                  scope: punctuation.section.block.end.c++
-                  pop: true
-                - include: preprocessor-global
-                - include: global
-            - match: '\}'
-              scope: punctuation.section.block.end.c++
-              pop: true
-            - include: preprocessor-global
-            - include: global
-        - match: (?=\S)
-          set: global-modifier
-    - match: ^\s*(?=\w)
-      push: global-modifier
-    - include: late-expressions
-
-  statements:
-    - include: preprocessor-statements
-    - include: scope:source.c#label
-    - include: expressions
-
-  expressions:
-    - include: early-expressions
-    - include: late-expressions
-
-  early-expressions:
-    - include: early-expressions-before-generic-type
-    - include: generic-type
-    - include: early-expressions-after-generic-type
-
-  early-expressions-before-generic-type:
-    - include: preprocessor-expressions
-    - include: comments
-    - include: case-default
-    - include: typedef
-    - include: keywords-angle-brackets
-    - include: keywords-parens
-    - include: keywords
-    - include: numbers
-    # Prevent a '<' from getting scoped as the start of another template
-    # parameter list, if in reality a less-than-or-equals sign is meant.
-    - match: <=
-      scope: keyword.operator.comparison.c
-
-  early-expressions-after-generic-type:
-    - include: members-arrow
-    - include: operators
-    - include: members-dot
-    - include: strings
-    - include: parens
-    - include: brackets
-    - include: block
-    - include: variables
-    - include: constants
-    - match: ','
-      scope: punctuation.separator.c++
-    - match: '\)|\}'
-      scope: invalid.illegal.stray-bracket-end.c++
-
-  expressions-minus-generic-type:
-    - include: early-expressions-before-generic-type
-    - include: angle-brackets
-    - include: early-expressions-after-generic-type
-    - include: late-expressions
-
-  expressions-minus-generic-type-function-call:
-    - include: early-expressions-before-generic-type
-    - include: angle-brackets
-    - include: early-expressions-after-generic-type
-    - include: late-expressions-before-function-call
-    - include: identifiers
-    - match: ';'
-      scope: punctuation.terminator.c++
-
-  late-expressions:
-    - include: late-expressions-before-function-call
-    - include: function-call
-    - include: identifiers
-    - match: ';'
-      scope: punctuation.terminator.c++
-
-  late-expressions-before-function-call:
-    - include: unique-late-expressions
-    - include: modifiers-parens
-    - include: modifiers
-    - include: types
-
-  expressions-minus-function-call:
-    - include: early-expressions
-    - include: late-expressions-before-function-call
-    - include: identifiers
-    - match: ';'
-      scope: punctuation.terminator.c++
-
-  comments:
-    - include: scope:source.c#comments
-
-  operators:
-    - include: scope:source.c#operators
-
-  modifiers:
-    - include: unique-modifiers
-    - include: scope:source.c#modifiers
-
-  variables:
-    - include: unique-variables
-    - include: scope:source.c#variables
-
-  constants:
-    - include: unique-constants
-    - include: scope:source.c#constants
-
-  keywords:
-    - include: unique-keywords
-    - include: scope:source.c#keywords
-
-  types:
-    - include: unique-types
-    - include: types-parens
-    - include: scope:source.c#types
-
-  strings:
-    - include: unique-strings
-    - match: '(L|u8|u|U)?(")'
-      captures:
-        1: storage.type.string.c++
-        2: punctuation.definition.string.begin.c++
-      push:
-        - meta_scope: string.quoted.double.c++
-        - match: '"'
-          scope: punctuation.definition.string.end.c++
-          pop: true
-        - include: scope:source.c#string_escaped_char
-        - match: |-
-            (?x)%
-              (\d+\$)?                                      # field (argument #)
-              [#0\- +']*                                    # flags
-              [,;:_]?                                       # separator character (AltiVec)
-              ((-?\d+)|\*(-?\d+\$)?)?                       # minimum field width
-              (\.((-?\d+)|\*(-?\d+\$)?)?)?                  # precision
-              (hh|h|ll|l|j|t|z|q|L|vh|vl|v|hv|hl)?          # length modifier
-              (\[[^\]]+\]|[am]s|[diouxXDOUeEfFgGaACcSspn%]) # conversion type
-          scope: constant.other.placeholder.c++
-        - match: '\{\{|\}\}'
-          scope: constant.character.escape.c++
-        - include: formatting-syntax
-    - include: scope:source.c#strings
-
-  formatting-syntax:
-    # https://docs.python.org/3.6/library/string.html#formatstrings
-    - match: |- # simple form
-        (?x)
-        (\{)
-          (?: [\w.\[\]]+)?             # field_name
-          (   ! [ars])?                # conversion
-          (   : (?:{{format_spec}}|    # format_spec OR
-                   [^}%]*%.[^}]*)      # any format-like string
-          )?
-        (\})
-      scope: constant.other.placeholder.c++
-      captures:
-        1: punctuation.definition.placeholder.begin.c++
-        2: storage.modifier.c++onversion.c++
-        3: constant.other.format-spec.c++
-        4: punctuation.definition.placeholder.end.c++
-    - match: \{(?=[^\}"']+\{[^"']*\}) # complex (nested) form
-      scope: punctuation.definition.placeholder.begin.c++
-      push:
-        - meta_scope: constant.other.placeholder.c++
-        - match: \}
-          scope: punctuation.definition.placeholder.end.c++
-          pop: true
-        - match: '[\w.\[\]]+'
-        - match: '![ars]'
-          scope: storage.modifier.conversion.c++
-        - match: ':'
-          push:
-            - meta_scope: meta.format-spec.c++ constant.other.format-spec.c++
-            - match: (?=\})
-              pop: true
-            - include: formatting-syntax
-
-  numbers:
-    - include: unique-numbers
-    - include: scope:source.c#numbers
-
-  ## C++-specific contexts
-
-  case-default:
-    - match: '\b(default|case)\b'
-      scope: keyword.control.c++
-      push:
-        - match: (?=[);,])
-          pop: true
-        - match: ':'
-          scope: punctuation.separator.c++
-          pop: true
-        - include: expressions
-
-  modifiers-parens:
-    - match: '\b(alignas)\b\s*(\()'
-      captures:
-        1: storage.modifier.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-    - match: \b(__attribute__)\s*(\(\()
-      captures:
-        1: storage.modifier.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push :
-        - meta_scope: meta.attribute.c++
-        - meta_content_scope: meta.group.c++
-        - include: parens
-        - include: strings
-        - match: \)\)
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-    - match: \b(__declspec)(\()
-      captures:
-        1: storage.modifier.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - match: '\b(align|allocate|code_seg|deprecated|property|uuid)\b\s*(\()'
-          captures:
-            1: storage.modifier.c++
-            2: meta.group.c++ punctuation.section.group.begin.c++
-          push:
-            - meta_content_scope: meta.group.c++
-            - match: '\)'
-              scope: meta.group.c++ punctuation.section.group.end.c++
-              pop: true
-            - include: numbers
-            - include: strings
-            - match: \b(get|put)\b
-              scope: variable.parameter.c++
-            - match: ','
-              scope: punctuation.separator.c++
-            - match: '='
-              scope: keyword.operator.assignment.c++
-        - match: '\b(appdomain|deprecated|dllimport|dllexport|jintrinsic|naked|noalias|noinline|noreturn|nothrow|novtable|process|restrict|safebuffers|selectany|thread)\b'
-          scope: constant.other.c++
-
-  types-parens:
-    - match: '\b(decltype)\b\s*(\()'
-      captures:
-        1: storage.type.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-
-  keywords-angle-brackets:
-    - match: \b({{casts}})\b\s*
-      scope: keyword.operator.word.cast.c++
-      push:
-        - match: '>'
-          scope: punctuation.section.generic.end.c++
-          pop: true
-        - match: '<'
-          scope: punctuation.section.generic.begin.c++
-          push:
-            - match: '(?=>)'
-              pop: true
-            - include: expressions-minus-generic-type-function-call
-
-  keywords-parens:
-    - match: '\b(alignof|typeid|static_assert|sizeof)\b\s*(\()'
-      captures:
-        1: keyword.operator.word.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-
-  namespace:
-    - match: '\b(using)\s+(namespace)\s+(?={{path_lookahead}})'
-      captures:
-        1: keyword.control.c++
-        2: keyword.control.c++
-      push:
-        - include: identifiers
-        - match: ''
-          pop: true
-    - match: '\b(namespace)\s+(?=({{path_lookahead}})?(?!\s*[;,]))'
-      scope: meta.namespace.c++
-      captures:
-        1: keyword.control.c++
-      push:
-        - meta_content_scope: meta.namespace.c++ entity.name.namespace.c++
-        - include: identifiers
-        - match: ''
-          set:
-            - meta_scope: meta.namespace.c++
-            - include: comments
-            - match: '='
-              scope: keyword.operator.alias.c++
-            - match: '(?=;)'
-              pop: true
-            - match: '\}'
-              scope: meta.block.c++ punctuation.section.block.end.c++
-              pop: true
-            - match: '\{'
-              scope: punctuation.section.block.begin.c++
-              push:
-                - meta_scope: meta.block.c++
-                - match: '(?=\})'
-                  pop: true
-                - include: preprocessor-global
-                - include: global
-            - include: expressions
-
-  template-common:
-    # Exit the template scope if we hit some basic invalid characters. This
-    # helps when a user is in the middle of typing their template types and
-    # prevents re-highlighting the whole file until the next > is found.
-    - match: (?=[{};])
-      pop: true
-    - include: expressions
-
-  template:
-    - match: \btemplate\b
-      scope: storage.type.template.c++
-      push:
-        - meta_scope: meta.template.c++
-        # Explicitly include comments here at the top, in order to NOT match the
-        # \S lookahead in the case of comments.
-        - include: comments
-        - match: <
-          scope: punctuation.section.generic.begin.c++
-          set:
-            - meta_content_scope: meta.template.c++
-            - match: '>'
-              scope: meta.template.c++ punctuation.section.generic.end.c++
-              pop: true
-            - match: \.{3}
-              scope: keyword.operator.variadic.c++
-            - match: \b(typename|{{before_tag}})\b
-              scope: storage.type.c++
-            - include: template # include template here for nested templates
-            - include: template-common
-        - match: (?=\S)
-          set:
-            - meta_content_scope: meta.template.c++
-            - match: \b({{before_tag}})\b
-              scope: storage.type.c++
-            - include: template-common
-
-  generic-type:
-    - match: '(?=(?!template){{path_lookahead}}\s*{{generic_lookahead}}\s*\()'
-      push:
-        - meta_scope: meta.function-call.c++
-        - match: \btemplate\b
-          scope: storage.type.template.c++
-        - match: '(?:(::)\s*)?{{identifier}}\s*(::)\s*'
-          captures:
-            1: punctuation.accessor.double-colon.c++
-            2: punctuation.accessor.double-colon.c++
-        - match: (?:(::)\s*)?({{identifier}})\s*(<)
-          captures:
-            1: punctuation.accessor.double-colon.c++
-            2: variable.function.c++
-            3: punctuation.section.generic.begin.c++
-          push:
-            - match: '>'
-              scope: punctuation.section.generic.end.c++
-              pop: true
-            - include: expressions-minus-generic-type-function-call
-        - match: (?:(::)\s*)?({{identifier}})\s*(\()
-          captures:
-            1: punctuation.accessor.double-colon.c++
-            2: variable.function.c++
-            3: punctuation.section.group.begin.c++
-          set:
-            - meta_scope: meta.function-call.c++
-            - meta_content_scope: meta.group.c++
-            - match: '\)'
-              scope: meta.group.c++ punctuation.section.group.end.c++
-              pop: true
-            - include: expressions
-        - include: angle-brackets
-        - match: '\('
-          scope: meta.group.c++ punctuation.section.group.begin.c++
-          set:
-            - meta_scope: meta.function-call.c++
-            - meta_content_scope: meta.group.c++
-            - match: '\)'
-              scope: meta.group.c++ punctuation.section.group.end.c++
-              pop: true
-            - include: expressions
-    - match: '(?=(?!template){{path_lookahead}}\s*{{generic_lookahead}})'
-      push:
-        - include: identifiers
-        - match: '<'
-          scope: punctuation.section.generic.begin.c++
-          set:
-            - match: '>'
-              scope: punctuation.section.generic.end.c++
-              pop: true
-            - include: expressions-minus-generic-type-function-call
-
-  angle-brackets:
-    - match: '<(?!<)'
-      scope: punctuation.section.generic.begin.c++
-      push:
-        - match: '>'
-          scope: punctuation.section.generic.end.c++
-          pop: true
-        - include: expressions-minus-generic-type-function-call
-
-  block:
-    - match: '\{'
-      scope: punctuation.section.block.begin.c++
-      push:
-        - meta_scope: meta.block.c++
-        - match: (?=^\s*#\s*(elif|else|endif)\b)
-          pop: true
-        - match: '\}'
-          scope: punctuation.section.block.end.c++
-          pop: true
-        - include: statements
-
-  function-call:
-    - match: (?={{path_lookahead}}\s*\()
-      push:
-        - meta_scope: meta.function-call.c++
-        - include: scope:source.c#c99
-        - match: '(?:(::)\s*)?{{identifier}}\s*(::)\s*'
-          scope: variable.function.c++
-          captures:
-            1: punctuation.accessor.c++
-            2: punctuation.accessor.c++
-        - match: '(?:(::)\s*)?{{identifier}}'
-          scope: variable.function.c++
-          captures:
-            1: punctuation.accessor.c++
-        - match: '\('
-          scope: meta.group.c++ punctuation.section.group.begin.c++
-          set:
-            - meta_content_scope: meta.function-call.c++ meta.group.c++
-            - match: '\)'
-              scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
-              pop: true
-            - include: expressions
-
-  members-inside-function-call:
-    - meta_content_scope: meta.method-call.c++ meta.group.c++
-    - match: \)
-      scope: meta.method-call.c++ meta.group.c++ punctuation.section.group.end.c++
-      pop: true
-    - include: expressions
-
-  members-after-accessor-junction:
-    # After we've seen an accessor (dot or arrow), this context decides what
-    # kind of entity we're accessing.
-    - include: comments
-    - match: \btemplate\b
-      scope: meta.method-call.c++ storage.type.template.c++
-      # Guaranteed to be a template member function call after we match this
-      set:
-        - meta_content_scope: meta.method-call.c++
-        - include: comments
-        - match: '{{identifier}}'
-          scope: variable.function.member.c++
-          set:
-            - meta_content_scope: meta.method-call.c++
-            - match: \(
-              scope: meta.group.c++ punctuation.section.group.begin.c++
-              set: members-inside-function-call
-            - include: comments
-            - include: angle-brackets
-            - match: (?=\S) # safety pop
-              pop: true
-        - match: (?=\S) # safety pop
-          pop: true
-    # Operator overloading
-    - match: '({{operator_method_name}})\s*(\()'
-      captures:
-        0: meta.method-call.c++
-        1: variable.function.member.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      set: members-inside-function-call
-    # Non-templated member function call
-    - match: (~?{{identifier}})\s*(\()
-      captures:
-        0: meta.method-call.c++
-        1: variable.function.member.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      set: members-inside-function-call
-    # Templated member function call
-    - match: (~?{{identifier}})\s*(?={{generic_lookahead}})
-      captures:
-        1: variable.function.member.c++
-      set:
-        - meta_scope: meta.method-call.c++
-        - match: <
-          scope: punctuation.section.generic.begin.c++
-          set:
-            - meta_content_scope: meta.method-call.c++
-            - match: '>'
-              scope: punctuation.section.generic.end.c++
-              set:
-                - meta_content_scope: meta.method-call.c++
-                - include: comments
-                - match: \(
-                  scope: punctuation.section.group.begin.c++
-                  set: members-inside-function-call
-                - match: (?=\S) # safety pop
-                  pop: true
-            - include: expressions
-    # Explicit base-class access
-    - match: ({{identifier}})\s*(::)
-      captures:
-        1: variable.other.base-class.c++
-        2: punctuation.accessor.double-colon.c++
-      set: members-after-accessor-junction # reset
-    # Just a regular member variable
-    - match: '{{identifier}}'
-      scope: variable.other.readwrite.member.c++
-      pop: true
-
-  members-dot:
-    - include: scope:source.c#access-illegal
-    # No lookahead required because members-dot goes after operators in the
-    # early-expressions-after-generic-type context. This means triple dots
-    # (i.e. "..." or "variadic") is attempted first.
-    - match: \.
-      scope: punctuation.accessor.dot.c++
-      push: members-after-accessor-junction
-
-  members-arrow:
-    # This needs to be before operators in the
-    # early-expressions-after-generic-type context because otherwise the "->"
-    # from the C language will match.
-    - match: ->
-      scope: punctuation.accessor.arrow.c++
-      push: members-after-accessor-junction
-
-  typedef:
-    - match: \btypedef\b
-      scope: storage.type.c++
-      push:
-        - match: ({{identifier}})?\s*(?=;)
-          captures:
-            1: entity.name.type.typedef.c++
-          pop: true
-        - match: \b(struct)\s+({{identifier}})\b
-          captures:
-            1: storage.type.c++
-        - include: expressions-minus-generic-type
-
-  parens:
-    - match: \(
-      scope: punctuation.section.group.begin.c++
-      push:
-        - meta_scope: meta.group.c++
-        - match: \)
-          scope: punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-
-  brackets:
-    - match: \[
-      scope: punctuation.section.brackets.begin.c++
-      push:
-        - meta_scope: meta.brackets.c++
-        - match: \]
-          scope: punctuation.section.brackets.end.c++
-          pop: true
-        - include: expressions
-
-  function-trailing-return-type:
-    - match: '{{non_angle_brackets}}'
-      pop: true
-    - include: angle-brackets
-    - include: types
-    - include: modifiers-parens
-    - include: modifiers
-    - include: identifiers
-    - match: \*|&
-      scope: keyword.operator.c++
-    - include: function-trailing-return-type-parens
-    - match: '(?=\S)'
-      pop: true
-
-  function-trailing-return-type-parens:
-    - match: \(
-      scope: punctuation.section.group.begin.c++
-      push:
-        - meta_scope: meta.group.c++
-        - match: \)
-          scope: punctuation.section.group.end.c++
-          pop: true
-        - include: function-trailing-return-type
-
-  ## Detection of function and data structure definitions at the global level
-
-  global-modifier:
-    - include: comments
-    - include: modifiers-parens
-    - include: modifiers
-    # Constructors and destructors don't have a type
-    - match: '(?={{path_lookahead}}\s*::\s*{{identifier}}\s*(\(|$))'
-      set:
-        - meta_content_scope: meta.function.c++ entity.name.function.constructor.c++
-        - include: identifiers
-        - match: '(?=[^\w\s])'
-          set: function-definition-params
-    - match: '(?={{path_lookahead}}\s*::\s*~{{identifier}}\s*(\(|$))'
-      set:
-        - meta_content_scope: meta.function.c++ entity.name.function.destructor.c++
-        - include: identifiers
-        - match: '~{{identifier}}'
-        - match: '(?=[^\w\s])'
-          set: function-definition-params
-    # If we see a path ending in :: before a newline, we don't know if it is
-    # a constructor or destructor, or a long return type, so we are just going
-    # to treat it like a regular function. Most likely it is a constructor,
-    # since it doesn't seem most developers would create such a long typename.
-    - match: '(?={{path_lookahead}}\s*::\s*$)'
-      set:
-        - meta_content_scope: meta.function.c++ entity.name.function.c++
-        - include: identifiers
-        - match: '~{{identifier}}'
-        - match: '(?=[^\w\s])'
-          set: function-definition-params
-    - include: unique-strings
-    - match: '(?=\S)'
-      set: global-type
-
-  global-type:
-    - include: comments
-    - match: \*|&
-      scope: keyword.operator.c++
-    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}}|operator)\b)'
-      pop: true
-    - match: '(?=\s)'
-      set: global-maybe-function
-    # If a class/struct/enum followed by a name that is not a macro or declspec
-    # then this is likely a return type of a function. This is uncommon.
-    - match: |-
-        (?x:
-          ({{before_tag}})
-          \s+
-          (?=
-            (?![[:upper:][:digit:]_]+\b|__declspec|{{before_tag}})
-            {{path_lookahead}}
-            (\s+{{identifier}}\s*\(|\s*[*&])
-          )
-        )
-      captures:
-        1: storage.type.c++
-      set:
-        - include: identifiers
-        - match: ''
-          set: global-maybe-function
-    # The previous match handles return types of struct/enum/etc from a func,
-    # there this one exits the context to allow matching an actual struct/class
-    - match: '(?=\b({{before_tag}})\b)'
-      set: data-structures
-    - match: '(?=\b({{casts}})\b\s*<)'
-      pop: true
-    - match: '{{non_angle_brackets}}'
-      pop: true
-    - include: angle-brackets
-    - include: types
-    # Allow a macro call
-    - match: '({{identifier}})\s*(\()(?=[^\)]+\))'
-      captures:
-        1: variable.function.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_scope: meta.function-call.c++
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-    - match: '(?={{path_lookahead}}\s*\()'
-      set:
-        - include: function-call
-        - match: ''
-          pop: true
-    - include: variables
-    - include: constants
-    - include: identifiers
-    - match: (?=\W)
-      pop: true
-
-  global-maybe-function:
-    - include: comments
-    # Consume pointer info, macros and any type info that was offset by macros
-    - match: \*|&
-      scope: keyword.operator.c++
-    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}})\b)'
-      pop: true
-    - match: '\b({{type_qualifier}})\b'
-      scope: storage.modifier.c++
-    - match: '{{non_angle_brackets}}'
-      pop: true
-    - include: angle-brackets
-    - include: types
-    - include: modifiers-parens
-    - include: modifiers
-    # All uppercase identifier just before a newline is most likely a macro
-    - match: '[[:upper:][:digit:]_]+\s*$'
-    # Operator overloading
-    - match: '(?=({{path_lookahead}}\s*(?:{{generic_lookahead}})?::\s*)?{{operator_method_name}}\s*(\(|$))'
-      set:
-        - meta_content_scope: meta.function.c++ entity.name.function.c++
-        - include: identifiers
-        - match: '(?=\s*(\(|$))'
-          set: function-definition-params
-    # Identifier that is not the function name - likely a macro or type
-    - match: '(?={{path_lookahead}}([ \t]+|[*&])(?!\s*(<|::|\(|$)))'
-      push:
-        - include: identifiers
-        - match: ''
-          pop: true
-    # Real function definition
-    - match: '(?={{path_lookahead}}({{generic_lookahead}}({{path_lookahead}})?)\s*(\(|$))'
-      set: [function-definition-params, global-function-identifier-generic]
-    - match: '(?={{path_lookahead}}\s*(\(|$))'
-      set: [function-definition-params, global-function-identifier]
-    - match: '(?={{path_lookahead}}\s*::\s*$)'
-      set: [function-definition-params, global-function-identifier]
-    - match: '(?=\S)'
-      pop: true
-
-  global-function-identifier-generic:
-    - include: angle-brackets
-    - match: '::'
-      scope: punctuation.accessor.c++
-    - match: '(?={{identifier}}<.*>\s*\()'
-      push:
-        - meta_content_scope: entity.name.function.c++
-        - include: identifiers
-        - match: '(?=<)'
-          pop: true
-    - match: '(?={{identifier}}\s*\()'
-      push:
-        - meta_content_scope: entity.name.function.c++
-        - include: identifiers
-        - match: ''
-          pop: true
-    - match: '(?=\()'
-      pop: true
-
-  global-function-identifier:
-    - meta_content_scope: entity.name.function.c++
-    - include: identifiers
-    - match: '(?=\S)'
-      pop: true
-
-  function-definition-params:
-    - meta_content_scope: meta.function.c++
-    - include: comments
-    - match: '(?=\()'
-      set:
-        - match: \(
-          scope: meta.function.parameters.c++ meta.group.c++ punctuation.section.group.begin.c++
-          set:
-            - meta_content_scope: meta.function.parameters.c++ meta.group.c++
-            - match : \)
-              scope: punctuation.section.group.end.c++
-              set: function-definition-continue
-            - match: '\bvoid\b'
-              scope: storage.type.c++
-            - match: '{{identifier}}(?=\s*(\[|,|\)|=))'
-              scope: variable.parameter.c++
-            - match: '='
-              scope: keyword.operator.assignment.c++
-              push:
-                - match: '(?=,|\))'
-                  pop: true
-                - include: expressions-minus-generic-type
-                - include: scope:source.c#preprocessor-line-continuation
-            - include: expressions-minus-generic-type
-            - include: scope:source.c#preprocessor-line-continuation
-    - match: (?=\S)
-      pop: true
-
-  function-definition-continue:
-    - meta_content_scope: meta.function.c++
-    - include: comments
-    - match: '(?=;)'
-      pop: true
-    - match: '->'
-      scope: punctuation.separator.c++
-      set: function-definition-trailing-return
-    - include: function-specifiers
-    - match: '='
-      scope: keyword.operator.assignment.c++
-    - match: '&'
-      scope: keyword.operator.c++
-    - match: \b0\b
-      scope: constant.numeric.c++
-    - match: \b(default|delete)\b
-      scope: storage.modifier.c++
-    - match: '(?=\{)'
-      set: function-definition-body
-    - match: '(?=\S)'
-      pop: true
-
-  function-definition-trailing-return:
-    - include: comments
-    - match: '(?=;)'
-      pop: true
-    - match: '(?=\{)'
-      set: function-definition-body
-    - include: function-specifiers
-    - include: function-trailing-return-type
-
-  function-definition-body:
-    - meta_content_scope: meta.function.c++ meta.block.c++
-    - match: '\{'
-      scope: punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.function.c++ meta.block.c++
-        - match: '\}'
-          scope: meta.function.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - match: (?=^\s*#\s*(elif|else|endif)\b)
-          pop: true
-        - match: '(?=({{before_tag}})([^(;]+$|.*\{))'
-          push: data-structures
-        - include: statements
-
-  ## Data structures including classes, structs, unions and enums
-
-  data-structures:
-    - match: '\bclass\b'
-      scope: storage.type.c++
-      set: data-structures-class-definition
-    # Detect variable type definitions using struct/enum/union followed by a tag
-    - match: '\b({{before_tag}})(?=\s+{{path_lookahead}}\s+{{path_lookahead}}\s*[=;\[])'
-      scope: storage.type.c++
-    - match: '\bstruct\b'
-      scope: storage.type.c++
-      set: data-structures-struct-definition
-    - match: '\benum(\s+(class|struct))?\b'
-      scope: storage.type.c++
-      set: data-structures-enum-definition
-    - match: '\bunion\b'
-      scope: storage.type.c++
-      set: data-structures-union-definition
-    - match: '(?=\S)'
-      pop: true
-
-  preprocessor-workaround-eat-macro-before-identifier:
-    # Handle macros so they aren't matched as the class name
-    - match: ({{macro_identifier}})(?=\s+~?{{identifier}})
-      captures:
-        1: meta.assumed-macro.c
-
-  data-structures-class-definition:
-    - meta_scope: meta.class.c++
-    - include: data-structures-definition-common-begin
-    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
-      scope: entity.name.class.forward-decl.c++
-      set: data-structures-class-definition-after-identifier
-    - match: '{{identifier}}'
-      scope: entity.name.class.c++
-      set: data-structures-class-definition-after-identifier
-    - match: '(?=[:{])'
-      set: data-structures-class-definition-after-identifier
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-class-definition-after-identifier:
-    - meta_content_scope: meta.class.c++
-    - include: data-structures-definition-common-begin
-    # No matching of identifiers since they should all be macros at this point
-    - include: data-structures-definition-common-end
-    - match: '\{'
-      scope: meta.block.c++ punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.class.c++ meta.block.c++
-        - match: '\}'
-          scope: meta.class.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - include: data-structures-body
-
-  data-structures-struct-definition:
-    - meta_scope: meta.struct.c++
-    - include: data-structures-definition-common-begin
-    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
-      scope: entity.name.struct.forward-decl.c++
-      set: data-structures-struct-definition-after-identifier
-    - match: '{{identifier}}'
-      scope: entity.name.struct.c++
-      set: data-structures-struct-definition-after-identifier
-    - match: '(?=[:{])'
-      set: data-structures-struct-definition-after-identifier
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-struct-definition-after-identifier:
-    - meta_content_scope: meta.struct.c++
-    - include: data-structures-definition-common-begin
-    # No matching of identifiers since they should all be macros at this point
-    - include: data-structures-definition-common-end
-    - match: '\{'
-      scope: meta.block.c++ punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.struct.c++ meta.block.c++
-        - match: '\}'
-          scope: meta.struct.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - include: data-structures-body
-
-  data-structures-enum-definition:
-    - meta_scope: meta.enum.c++
-    - include: data-structures-definition-common-begin
-    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
-      scope: entity.name.enum.forward-decl.c++
-      set: data-structures-enum-definition-after-identifier
-    - match: '{{identifier}}'
-      scope: entity.name.enum.c++
-      set: data-structures-enum-definition-after-identifier
-    - match: '(?=[:{])'
-      set: data-structures-enum-definition-after-identifier
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-enum-definition-after-identifier:
-    - meta_content_scope: meta.enum.c++
-    - include: data-structures-definition-common-begin
-    # No matching of identifiers since they should all be macros at this point
-    - include: data-structures-definition-common-end
-    - match: '\{'
-      scope: meta.block.c++ punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.enum.c++ meta.block.c++
-        # Enums don't support methods so we have a simplified body
-        - match: '\}'
-          scope: meta.enum.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - include: statements
-
-  data-structures-union-definition:
-    - meta_scope: meta.union.c++
-    - include: data-structures-definition-common-begin
-    - match: '{{identifier}}(?={{data_structures_forward_decl_lookahead}})'
-      scope: entity.name.union.forward-decl.c++
-      set: data-structures-union-definition-after-identifier
-    - match: '{{identifier}}'
-      scope: entity.name.union.c++
-      set: data-structures-union-definition-after-identifier
-    - match: '(?=[{])'
-      set: data-structures-union-definition-after-identifier
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-union-definition-after-identifier:
-    - meta_content_scope: meta.union.c++
-    - include: data-structures-definition-common-begin
-    # No matching of identifiers since they should all be macros at this point
-    # Unions don't support base classes
-    - include: angle-brackets
-    - match: '\{'
-      scope: meta.block.c++ punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.union.c++ meta.block.c++
-        - match: '\}'
-          scope: meta.union.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - include: data-structures-body
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-definition-common-begin:
-    - include: comments
-    - match: '(?=\b(?:{{before_tag}}|{{control_keywords}})\b)'
-      pop: true
-    - include: preprocessor-other
-    - include: modifiers-parens
-    - include: modifiers
-    - include: preprocessor-workaround-eat-macro-before-identifier
-
-  data-structures-definition-common-end:
-    - include: angle-brackets
-    - match: \bfinal\b
-      scope: storage.modifier.c++
-    - match: ':'
-      scope: punctuation.separator.c++
-      push:
-        - include: comments
-        - include: preprocessor-other
-        - include: modifiers-parens
-        - include: modifiers
-        - match: '\b(virtual|{{visibility_modifiers}})\b'
-          scope: storage.modifier.c++
-        - match: (?={{path_lookahead}})
-          push:
-            - meta_scope: entity.other.inherited-class.c++
-            - include: identifiers
-            - match: ''
-              pop: true
-        - include: angle-brackets
-        - match: ','
-          scope: punctuation.separator.c++
-        - match: (?=\{|;)
-          pop: true
-    - match: '(?=;)'
-      pop: true
-
-  data-structures-body:
-    - include: preprocessor-data-structures
-    - match: '(?=\btemplate\b)'
-      push:
-        - include: template
-        - match: (?=\S)
-          set: data-structures-modifier
-    - include: typedef
-    - match: \b({{visibility_modifiers}})\s*(:)(?!:)
-      captures:
-        1: storage.modifier.c++
-        2: punctuation.section.class.c++
-    - match: '^\s*(?=(?:~?\w+|::))'
-      push: data-structures-modifier
-    - include: expressions-minus-generic-type
-
-  data-structures-modifier:
-    - match: '\bfriend\b'
-      scope: storage.modifier.c++
-      push:
-        - match: (?=;)
-          pop: true
-        - match: '\{'
-          scope: punctuation.section.block.begin.c++
-          set:
-            - meta_scope: meta.block.c++
-            - match: '\}'
-              scope: punctuation.section.block.end.c++
-              pop: true
-            - include: statements
-        - match: '\b({{before_tag}})\b'
-          scope: storage.type.c++
-        - include: expressions-minus-function-call
-    - include: comments
-    - include: modifiers-parens
-    - include: modifiers
-    - match: '\bstatic_assert(?=\s*\()'
-      scope: meta.static-assert.c++ keyword.operator.word.c++
-      push:
-        - match: '\('
-          scope: meta.group.c++ punctuation.section.group.begin.c++
-          set:
-            - meta_content_scope: meta.function-call.c++ meta.group.c++
-            - match: '\)'
-              scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
-              pop: true
-            - include: expressions
-    # Destructor
-    - match: '(?:{{identifier}}\s*(::)\s*)?~{{identifier}}(?=\s*(\(|$))'
-      scope: meta.method.destructor.c++ entity.name.function.destructor.c++
-      captures:
-        1: punctuation.accessor.c++
-      set: method-definition-params
-    # It's a macro, not a constructor if there is no type in the first param
-    - match: '({{identifier}})\s*(\()(?=\s*(?!void){{identifier}}\s*[),])'
-      captures:
-        1: variable.function.c++
-        2: meta.group.c++ punctuation.section.group.begin.c++
-      push:
-        - meta_scope: meta.function-call.c++
-        - meta_content_scope: meta.group.c++
-        - match: '\)'
-          scope: meta.group.c++ punctuation.section.group.end.c++
-          pop: true
-        - include: expressions
-    # Constructor
-    - include: preprocessor-workaround-eat-macro-before-identifier
-    - match: '((?!{{before_tag}}|template){{identifier}})(?=\s*\()'
-      scope: meta.method.constructor.c++ entity.name.function.constructor.c++
-      set: method-definition-params
-    # Long form constructor
-    - match: '({{identifier}}\s*(::)\s*{{identifier}})(?=\s*\()'
-      captures:
-        1: meta.method.constructor.c++ entity.name.function.constructor.c++
-        2: punctuation.accessor.c++
-      push: method-definition-params
-    - match: '(?=\S)'
-      set: data-structures-type
-
-  data-structures-type:
-    - include: comments
-    - match: \*|&
-      scope: keyword.operator.c++
-      # Cast methods
-    - match: '(operator)\s+({{identifier}})(?=\s*(\(|$))'
-      captures:
-        1: keyword.control.c++
-        2: meta.method.c++ entity.name.function.c++
-      set: method-definition-params
-    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}}|operator)\b)'
-      pop: true
-    - match: '(?=\s)'
-      set: data-structures-maybe-method
-    # If a class/struct/enum followed by a name that is not a macro or declspec
-    # then this is likely a return type of a function. This is uncommon.
-    - match: |-
-        (?x:
-          ({{before_tag}})
-          \s+
-          (?=
-            (?![[:upper:][:digit:]_]+\b|__declspec|{{before_tag}})
-            {{path_lookahead}}
-            (\s+{{identifier}}\s*\(|\s*[*&])
-          )
-        )
-      captures:
-        1: storage.type.c++
-      set:
-        - include: identifiers
-        - match: ''
-          set: data-structures-maybe-method
-    # The previous match handles return types of struct/enum/etc from a func,
-    # there this one exits the context to allow matching an actual struct/class
-    - match: '(?=\b({{before_tag}})\b)'
-      set: data-structures
-    - match: '(?=\b({{casts}})\b\s*<)'
-      pop: true
-    - match: '{{non_angle_brackets}}'
-      pop: true
-    - include: angle-brackets
-    - include: types
-    - include: variables
-    - include: constants
-    - include: identifiers
-    - match: (?=[&*])
-      set: data-structures-maybe-method
-    - match: (?=\W)
-      pop: true
-
-  data-structures-maybe-method:
-    - include: comments
-    # Consume pointer info, macros and any type info that was offset by macros
-    - match: \*|&
-      scope: keyword.operator.c++
-    - match: '(?=\b({{control_keywords}}|{{operator_keywords}}|{{casts}}|{{memory_operators}}|{{other_keywords}})\b)'
-      pop: true
-    - match: '\b({{type_qualifier}})\b'
-      scope: storage.modifier.c++
-    - match: '{{non_angle_brackets}}'
-      pop: true
-    - include: angle-brackets
-    - include: types
-    - include: modifiers-parens
-    - include: modifiers
-    # Operator overloading
-    - match: '{{operator_method_name}}(?=\s*(\(|$))'
-      scope: meta.method.c++ entity.name.function.c++
-      set: method-definition-params
-    # Identifier that is not the function name - likely a macro or type
-    - match: '(?={{path_lookahead}}([ \t]+|[*&])(?!\s*(<|::|\()))'
-      push:
-        - include: identifiers
-        - match: ''
-          pop: true
-    # Real function definition
-    - match: '(?={{path_lookahead}}({{generic_lookahead}})\s*(\())'
-      set: [method-definition-params, data-structures-function-identifier-generic]
-    - match: '(?={{path_lookahead}}\s*(\())'
-      set: [method-definition-params, data-structures-function-identifier]
-    - match: '(?={{path_lookahead}}\s*::\s*$)'
-      set: [method-definition-params, data-structures-function-identifier]
-    - match: '(?=\S)'
-      pop: true
-
-  data-structures-function-identifier-generic:
-    - include: angle-brackets
-    - match: '(?={{identifier}})'
-      push:
-        - meta_content_scope: entity.name.function.c++
-        - include: identifiers
-        - match: '(?=<)'
-          pop: true
-    - match: '(?=\()'
-      pop: true
-
-  data-structures-function-identifier:
-    - meta_content_scope: entity.name.function.c++
-    - include: identifiers
-    - match: '(?=\S)'
-      pop: true
-
-  method-definition-params:
-    - meta_content_scope: meta.method.c++
-    - include: comments
-    - match: '(?=\()'
-      set:
-        - match: \(
-          scope: meta.method.parameters.c++ meta.group.c++ punctuation.section.group.begin.c++
-          set:
-            - meta_content_scope: meta.method.parameters.c++ meta.group.c++
-            - match : \)
-              scope: punctuation.section.group.end.c++
-              set: method-definition-continue
-            - match: '\bvoid\b'
-              scope: storage.type.c++
-            - match: '{{identifier}}(?=\s*(\[|,|\)|=))'
-              scope: variable.parameter.c++
-            - match: '='
-              scope: keyword.operator.assignment.c++
-              push:
-                - match: '(?=,|\))'
-                  pop: true
-                - include: expressions-minus-generic-type
-            - include: expressions-minus-generic-type
-    - match: '(?=\S)'
-      pop: true
-
-  method-definition-continue:
-    - meta_content_scope: meta.method.c++
-    - include: comments
-    - match: '(?=;)'
-      pop: true
-    - match: '->'
-      scope: punctuation.separator.c++
-      set: method-definition-trailing-return
-    - include: function-specifiers
-    - match: '='
-      scope: keyword.operator.assignment.c++
-    - match: '&'
-      scope: keyword.operator.c++
-    - match: \b0\b
-      scope: constant.numeric.c++
-    - match: \b(default|delete)\b
-      scope: storage.modifier.c++
-    - match: '(?=:)'
-      set:
-        - match: ':'
-          scope: punctuation.separator.initializer-list.c++
-          set:
-            - meta_scope: meta.method.constructor.initializer-list.c++
-            - match: '{{identifier}}'
-              scope: variable.other.readwrite.member.c++
-              push:
-                - match: \(
-                  scope: meta.group.c++ punctuation.section.group.begin.c++
-                  set:
-                    - meta_content_scope: meta.group.c++
-                    - match: \)
-                      scope: meta.group.c++ punctuation.section.group.end.c++
-                      pop: true
-                    - include: expressions
-                - match: \{
-                  scope: meta.group.c++ punctuation.section.group.begin.c++
-                  set:
-                    - meta_content_scope: meta.group.c++
-                    - match: \}
-                      scope: meta.group.c++ punctuation.section.group.end.c++
-                      pop: true
-                    - include: expressions
-                - include: comments
-            - match: (?=\{|;)
-              set: method-definition-continue
-            - include: expressions
-    - match: '(?=\{)'
-      set: method-definition-body
-    - match: '(?=\S)'
-      pop: true
-
-  method-definition-trailing-return:
-    - include: comments
-    - match: '(?=;)'
-      pop: true
-    - match: '(?=\{)'
-      set: method-definition-body
-    - include: function-specifiers
-    - include: function-trailing-return-type
-
-  method-definition-body:
-    - meta_content_scope: meta.method.c++ meta.block.c++
-    - match: '\{'
-      scope: punctuation.section.block.begin.c++
-      set:
-        - meta_content_scope: meta.method.c++ meta.block.c++
-        - match: '\}'
-          scope: meta.method.c++ meta.block.c++ punctuation.section.block.end.c++
-          pop: true
-        - match: (?=^\s*#\s*(elif|else|endif)\b)
-          pop: true
-        - match: '(?=({{before_tag}})([^(;]+$|.*\{))'
-          push: data-structures
-        - include: statements
-
-  ## Preprocessor for data-structures
-
-  preprocessor-data-structures:
-    - include: preprocessor-rule-enabled-data-structures
-    - include: preprocessor-rule-disabled-data-structures
-    - include: preprocessor-practical-workarounds
-
-  preprocessor-rule-disabled-data-structures:
-    - match: ^\s*((#if)\s+(0))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: negated-block
-            - include: data-structures-body
-        - match: ""
-          push:
-            - meta_scope: comment.block.preprocessor.if-branch.c++
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-
-  preprocessor-rule-enabled-data-structures:
-    - match: ^\s*((#if)\s+(0*1))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - meta_content_scope: comment.block.preprocessor.else-branch.c++
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-        - match: ""
-          push:
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: negated-block
-            - include: data-structures-body
-
-  ## Preprocessor for global
-
-  preprocessor-global:
-    - include: preprocessor-rule-enabled-global
-    - include: preprocessor-rule-disabled-global
-    - include: preprocessor-rule-other-global
-
-  preprocessor-statements:
-    - include: preprocessor-rule-enabled-statements
-    - include: preprocessor-rule-disabled-statements
-    - include: preprocessor-rule-other-statements
-
-  preprocessor-expressions:
-    - include: scope:source.c#incomplete-inc
-    - include: preprocessor-macro-define
-    - include: scope:source.c#pragma-mark
-    - include: preprocessor-other
-
-  preprocessor-rule-disabled-global:
-    - match: ^\s*((#if)\s+(0))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: preprocessor-global
-            - include: negated-block
-            - include: global
-        - match: ""
-          push:
-            - meta_scope: comment.block.preprocessor.if-branch.c++
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-
-  preprocessor-rule-enabled-global:
-    - match: ^\s*((#if)\s+(0*1))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - meta_content_scope: comment.block.preprocessor.else-branch.c++
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-        - match: ""
-          push:
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: preprocessor-global
-            - include: negated-block
-            - include: global
-
-  preprocessor-rule-other-global:
-    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
-      captures:
-        1: keyword.control.import.c++
-      push:
-        - meta_scope: meta.preprocessor.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-comments
-        - match: \bdefined\b
-          scope: keyword.control.c++
-        # Enter a new scope where all elif/else branches have their
-        # contexts popped by a subsequent elif/else/endif. This ensures that
-        # preprocessor branches don't push multiple meta.block scopes on
-        # the stack, thus messing up the "global" context's detection of
-        # functions.
-        - match: $\n
-          set: preprocessor-if-branch-global
-
-  # These gymnastics here ensure that we are properly handling scope even
-  # when the preprocessor is used to create different scope beginnings, such
-  # as a different if/while condition
-  preprocessor-if-branch-global:
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      pop: true
-    - match: (?=^\s*#\s*(elif|else)\b)
-      push: preprocessor-elif-else-branch-global
-    - match: \{
-      scope: punctuation.section.block.begin.c++
-      set: preprocessor-block-if-branch-global
-    - include: preprocessor-global
-    - include: negated-block
-    - include: global
-
-  preprocessor-block-if-branch-global:
-    - meta_scope: meta.block.c++
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-block-finish-global
-    - match: (?=^\s*#\s*(elif|else)\b)
-      push: preprocessor-elif-else-branch-global
-    - match: \}
-      scope: punctuation.section.block.end.c++
-      set: preprocessor-if-branch-global
-    - include: statements
-
-  preprocessor-block-finish-global:
-    - meta_scope: meta.block.c++
-    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-block-finish-if-branch-global
-    - match: \}
-      scope: punctuation.section.block.end.c++
-      pop: true
-    - include: statements
-
-  preprocessor-block-finish-if-branch-global:
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: keyword.control.import.c++
-      pop: true
-    - match: \}
-      scope: punctuation.section.block.end.c++
-      set: preprocessor-if-branch-global
-    - include: statements
-
-  preprocessor-elif-else-branch-global:
-    - match: (?=^\s*#\s*(endif)\b)
-      pop: true
-    - include: preprocessor-global
-    - include: negated-block
-    - include: global
-
-  ## Preprocessor for statements
-
-  preprocessor-rule-disabled-statements:
-    - match: ^\s*((#if)\s+(0))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: negated-block
-            - include: statements
-        - match: ""
-          push:
-            - meta_scope: comment.block.preprocessor.if-branch.c++
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-
-  preprocessor-rule-enabled-statements:
-    - match: ^\s*((#if)\s+(0*1))\b
-      captures:
-        1: meta.preprocessor.c++
-        2: keyword.control.import.c++
-        3: constant.numeric.preprocessor.c++
-      push:
-        - match: ^\s*(#\s*endif)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.c++
-          pop: true
-        - match: ^\s*(#\s*else)\b
-          captures:
-            1: meta.preprocessor.c++ keyword.control.import.else.c++
-          push:
-            - meta_content_scope: comment.block.preprocessor.else-branch.c++
-            - match: (?=^\s*#\s*endif\b)
-              pop: true
-            - include: scope:source.c#preprocessor-disabled
-        - match: ""
-          push:
-            - match: (?=^\s*#\s*(else|endif)\b)
-              pop: true
-            - include: negated-block
-            - include: statements
-
-  preprocessor-rule-other-statements:
-    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
-      captures:
-        1: keyword.control.import.c++
-      push:
-        - meta_scope: meta.preprocessor.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-comments
-        - match: \bdefined\b
-          scope: keyword.control.c++
-        # Enter a new scope where all elif/else branches have their
-        # contexts popped by a subsequent elif/else/endif. This ensures that
-        # preprocessor branches don't push multiple meta.block scopes on
-        # the stack, thus messing up the "global" context's detection of
-        # functions.
-        - match: $\n
-          set: preprocessor-if-branch-statements
-
-  # These gymnastics here ensure that we are properly handling scope even
-  # when the preprocessor is used to create different scope beginnings, such
-  # as a different if/while condition
-  preprocessor-if-branch-statements:
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      pop: true
-    - match: (?=^\s*#\s*(elif|else)\b)
-      push: preprocessor-elif-else-branch-statements
-    - match: \{
-      scope: punctuation.section.block.begin.c++
-      set: preprocessor-block-if-branch-statements
-    - match: (?=(?!{{non_func_keywords}}){{path_lookahead}}\s*\()
-      set: preprocessor-if-branch-function-call
-    - include: negated-block
-    - include: statements
-
-  preprocessor-if-branch-function-call:
-    - meta_content_scope: meta.function-call.c++
-    - include: scope:source.c#c99
-    - match: '(?:(::)\s*)?{{identifier}}\s*(::)\s*'
-      scope: variable.function.c++
-      captures:
-        1: punctuation.accessor.c++
-        2: punctuation.accessor.c++
-    - match: '(?:(::)\s*)?{{identifier}}'
-      scope: variable.function.c++
-      captures:
-        1: punctuation.accessor.c++
-    - match: '\('
-      scope: meta.group.c++ punctuation.section.group.begin.c++
-      set: preprocessor-if-branch-function-call-arguments
-
-  preprocessor-if-branch-function-call-arguments:
-    - meta_content_scope: meta.function-call.c++ meta.group.c++
-    - match : \)
-      scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
-      set: preprocessor-if-branch-statements
-    - match: ^\s*(#\s*(?:elif|else))\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-if-branch-statements
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-if-branch-function-call-arguments-finish
-    - include: expressions
-
-  preprocessor-if-branch-function-call-arguments-finish:
-    - meta_content_scope: meta.function-call.c++ meta.group.c++
-    - match: \)
-      scope: meta.function-call.c++ meta.group.c++ punctuation.section.group.end.c++
-      pop: true
-    - include: expressions
-
-  preprocessor-block-if-branch-statements:
-    - meta_scope: meta.block.c++
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-block-finish-statements
-    - match: (?=^\s*#\s*(elif|else)\b)
-      push: preprocessor-elif-else-branch-statements
-    - match: \}
-      scope: punctuation.section.block.end.c++
-      set: preprocessor-if-branch-statements
-    - include: statements
-
-  preprocessor-block-finish-statements:
-    - meta_scope: meta.block.c++
-    - match: ^\s*(#\s*(?:if|ifdef|ifndef))\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-      set: preprocessor-block-finish-if-branch-statements
-    - match: \}
-      scope: punctuation.section.block.end.c++
-      pop: true
-    - include: statements
-
-  preprocessor-block-finish-if-branch-statements:
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: keyword.control.import.c++
-      pop: true
-    - match: \}
-      scope: meta.block.c++ punctuation.section.block.end.c++
-      set: preprocessor-if-branch-statements
-    - include: statements
-
-  preprocessor-elif-else-branch-statements:
-    - match: (?=^\s*#\s*endif\b)
-      pop: true
-    - include: negated-block
-    - include: statements
-
-  ## Preprocessor other
-
-  negated-block:
-    - match: '\}'
-      scope: punctuation.section.block.end.c++
-      push:
-        - match: '\{'
-          scope: punctuation.section.block.begin.c++
-          pop: true
-        - match: (?=^\s*#\s*(elif|else|endif)\b)
-          pop: true
-        - include: statements
-
-  preprocessor-macro-define:
-    - match: ^\s*(\#\s*define)\b
-      captures:
-        1: meta.preprocessor.macro.c++ keyword.control.import.define.c++
-      push:
-        - meta_content_scope: meta.preprocessor.macro.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-line-ending
-        - include: scope:source.c#preprocessor-comments
-        - match: '({{identifier}})(?=\()'
-          scope: entity.name.function.preprocessor.c++
-          set:
-            - match: '\('
-              scope: punctuation.section.group.begin.c++
-              set: preprocessor-macro-params
-        - match: '{{identifier}}'
-          scope: entity.name.constant.preprocessor.c++
-          set: preprocessor-macro-definition
-
-  preprocessor-macro-params:
-    - meta_scope: meta.preprocessor.macro.parameters.c++ meta.group.c++
-    - match: '{{identifier}}'
-      scope: variable.parameter.c++
-    - match: \)
-      scope: punctuation.section.group.end.c++
-      set: preprocessor-macro-definition
-    - match: ','
-      scope: punctuation.separator.c++
-      push:
-        - match: '{{identifier}}'
-          scope: variable.parameter.c++
-          pop: true
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-comments
-        - match: '\.\.\.'
-          scope: keyword.operator.variadic.c++
-        - match: '(?=\))'
-          pop: true
-        - match: (/\*).*(\*/)
-          scope: comment.block.c++
-          captures:
-            1: punctuation.definition.comment.c++
-            2: punctuation.definition.comment.c++
-        - match: '\S+'
-          scope: invalid.illegal.unexpected-character.c++
-    - include: scope:source.c#preprocessor-line-continuation
-    - include: scope:source.c#preprocessor-comments
-    - match: '\.\.\.'
-      scope: keyword.operator.variadic.c++
-    - match: (/\*).*(\*/)
-      scope: comment.block.c++
-      captures:
-        1: punctuation.definition.comment.c++
-        2: punctuation.definition.comment.c++
-    - match: $\n
-      scope: invalid.illegal.unexpected-end-of-line.c++
-
-  preprocessor-macro-definition:
-    - meta_content_scope: meta.preprocessor.macro.c++
-    - include: scope:source.c#preprocessor-line-continuation
-    - include: scope:source.c#preprocessor-line-ending
-    - include: scope:source.c#preprocessor-comments
-    # Don't define blocks in define statements
-    - match: '\{'
-      scope: punctuation.section.block.begin.c++
-    - match: '\}'
-      scope: punctuation.section.block.end.c++
-    - include: expressions
-
-  preprocessor-practical-workarounds:
-    - include: preprocessor-convention-ignore-uppercase-ident-lines
-    - include: scope:source.c#preprocessor-convention-ignore-uppercase-calls-without-semicolon
-
-  preprocessor-convention-ignore-uppercase-ident-lines:
-    - match: ^(\s*{{macro_identifier}})+\s*$
-      scope: meta.assumed-macro.c++
-      push:
-        # It's possible that we are dealing with a function return type on its own line, and the
-        # name of the function is on the subsequent line.
-        - match: '(?={{path_lookahead}}({{generic_lookahead}}({{path_lookahead}})?)\s*\()'
-          set: [function-definition-params, global-function-identifier-generic]
-        - match: '(?={{path_lookahead}}\s*\()'
-          set: [function-definition-params, global-function-identifier]
-        - match: ^
-          pop: true
-
-  preprocessor-other:
-    - match: ^\s*(#\s*(?:if|ifdef|ifndef|elif|else|line|pragma|undef))\b
-      captures:
-        1: keyword.control.import.c++
-      push:
-        - meta_scope: meta.preprocessor.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-line-ending
-        - include: scope:source.c#preprocessor-comments
-        - match: \bdefined\b
-          scope: keyword.control.c++
-    - match: ^\s*(#\s*endif)\b
-      captures:
-        1: meta.preprocessor.c++ keyword.control.import.c++
-    - match: ^\s*(#\s*(?:error|warning))\b
-      captures:
-        1: keyword.control.import.error.c++
-      push:
-        - meta_scope: meta.preprocessor.diagnostic.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-line-ending
-        - include: scope:source.c#preprocessor-comments
-        - include: strings
-        - match: '\S+'
-          scope: string.unquoted.c++
-    - match: ^\s*(#\s*(?:include|include_next|import))\b
-      captures:
-        1: keyword.control.import.include.c++
-      push:
-        - meta_scope: meta.preprocessor.include.c++
-        - include: scope:source.c#preprocessor-line-continuation
-        - include: scope:source.c#preprocessor-line-ending
-        - include: scope:source.c#preprocessor-comments
-        - match: '"'
-          scope: punctuation.definition.string.begin.c++
-          push:
-            - meta_scope: string.quoted.double.include.c++
-            - match: '"'
-              scope: punctuation.definition.string.end.c++
-              pop: true
-        - match: <
-          scope: punctuation.definition.string.begin.c++
-          push:
-            - meta_scope: string.quoted.other.lt-gt.include.c++
-            - match: '>'
-              scope: punctuation.definition.string.end.c++
-              pop: true
-    - include: preprocessor-practical-workarounds
diff --git a/3party/fmt/support/README b/3party/fmt/support/README
deleted file mode 100644
index 468f548..0000000
--- a/3party/fmt/support/README
+++ /dev/null
@@ -1,4 +0,0 @@
-This directory contains build support files such as
-
-* CMake modules
-* Build scripts
diff --git a/3party/fmt/support/Vagrantfile b/3party/fmt/support/Vagrantfile
deleted file mode 100644
index 9680a1a..0000000
--- a/3party/fmt/support/Vagrantfile
+++ /dev/null
@@ -1,20 +0,0 @@
-# -*- mode: ruby -*-
-# vi: set ft=ruby :
-
-# A vagrant config for testing against gcc-4.8.
-Vagrant.configure("2") do |config|
-  config.vm.box = "ubuntu/xenial64"
-  config.disksize.size = '15GB'
-
-  config.vm.provider "virtualbox" do |vb|
-    vb.memory = "4096"
-  end
-
-  config.vm.provision "shell", inline: <<-SHELL
-    apt-get update
-    apt-get install -y g++ make wget git
-    wget -q https://github.com/Kitware/CMake/releases/download/v3.26.0/cmake-3.26.0-Linux-x86_64.tar.gz
-    tar xzf cmake-3.26.0-Linux-x86_64.tar.gz
-    ln -s `pwd`/cmake-3.26.0-Linux-x86_64/bin/cmake /usr/local/bin
-  SHELL
-end
diff --git a/3party/fmt/support/bazel/.bazelversion b/3party/fmt/support/bazel/.bazelversion
deleted file mode 100644
index 5e32542..0000000
--- a/3party/fmt/support/bazel/.bazelversion
+++ /dev/null
@@ -1 +0,0 @@
-6.1.2
diff --git a/3party/fmt/support/bazel/BUILD.bazel b/3party/fmt/support/bazel/BUILD.bazel
deleted file mode 100644
index 29f639b..0000000
--- a/3party/fmt/support/bazel/BUILD.bazel
+++ /dev/null
@@ -1,28 +0,0 @@
-cc_library(
-    name = "fmt",
-    srcs = [
-        #"src/fmt.cc", # No C++ module support
-        "src/format.cc",
-        "src/os.cc",
-    ],
-    hdrs = [
-        "include/fmt/args.h",
-        "include/fmt/chrono.h",
-        "include/fmt/color.h",
-        "include/fmt/compile.h",
-        "include/fmt/core.h",
-        "include/fmt/format.h",
-        "include/fmt/format-inl.h",
-        "include/fmt/os.h",
-        "include/fmt/ostream.h",
-        "include/fmt/printf.h",
-        "include/fmt/ranges.h",
-        "include/fmt/std.h",
-        "include/fmt/xchar.h",
-    ],
-    includes = [
-        "include",
-    ],
-    strip_include_prefix = "include",
-    visibility = ["//visibility:public"],
-)
diff --git a/3party/fmt/support/bazel/README.md b/3party/fmt/support/bazel/README.md
deleted file mode 100644
index 4c29feb..0000000
--- a/3party/fmt/support/bazel/README.md
+++ /dev/null
@@ -1,74 +0,0 @@
-# Bazel support
-
-To get [Bazel](https://bazel.build/) working with {fmt} you can copy the files `BUILD.bazel`, `WORKSPACE.bazel`, and `.bazelversion` from this folder (`support/bazel`) to the root folder of this project. This way {fmt} gets bazelized and can be used with Bazel (e.g. doing a `bazel build //...` on {fmt}). 
-
-## Using {fmt} as a dependency
-
-The following minimal example shows how to use {fmt} as a dependency within a Bazel project.
-
-The following file structure is assumed:
-
-```
-example
-├── BUILD.bazel
-├── main.cpp
-└── WORKSPACE.bazel
-```
-
-*main.cpp*:
-
-```c++
-#include "fmt/core.h"
-
-int main() {
-  fmt::print("The answer is {}\n", 42);
-}
-```
-
-The expected output of this example is `The answer is 42`.
-
-*WORKSPACE.bazel*:
-
-```python
-load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
-
-git_repository(
-    name = "fmt",
-    branch = "master",
-    remote = "https://github.com/fmtlib/fmt",
-    patch_cmds = [
-        "mv support/bazel/.bazelversion .bazelversion",
-        "mv support/bazel/BUILD.bazel BUILD.bazel",
-        "mv support/bazel/WORKSPACE.bazel WORKSPACE.bazel",
-    ],
-    # Windows-related patch commands are only needed in the case MSYS2 is not installed.
-    # More details about the installation process of MSYS2 on Windows systems can be found here:
-    # https://docs.bazel.build/versions/main/install-windows.html#installing-compilers-and-language-runtimes
-    # Even if MSYS2 is installed the Windows related patch commands can still be used.
-    patch_cmds_win = [
-        "Move-Item -Path support/bazel/.bazelversion -Destination .bazelversion",
-        "Move-Item -Path support/bazel/BUILD.bazel -Destination BUILD.bazel",
-        "Move-Item -Path support/bazel/WORKSPACE.bazel -Destination WORKSPACE.bazel",
-    ],
-)
-```
-
-In the *WORKSPACE* file, the {fmt} GitHub repository is fetched. Using the attribute `patch_cmds` the  files `BUILD.bazel`, `WORKSPACE.bazel`, and `.bazelversion` are moved to the root of the {fmt} repository. This way the {fmt} repository is recognized as a bazelized workspace. 
-
-*BUILD.bazel*:
-
-```python
-cc_binary(
-    name = "Demo",
-    srcs = ["main.cpp"],
-    deps = ["@fmt"],
-)
-```
-
-The *BUILD* file defines a binary named `Demo` that has a dependency to {fmt}.
-
-To execute the binary you can run `bazel run //:Demo`.
-
-# Using Bzlmod
-
-The [Bazel Central Registry](https://github.com/bazelbuild/bazel-central-registry/tree/main/modules/fmt) also provides support for {fmt}.
diff --git a/3party/fmt/support/bazel/WORKSPACE.bazel b/3party/fmt/support/bazel/WORKSPACE.bazel
deleted file mode 100644
index 5be7781..0000000
--- a/3party/fmt/support/bazel/WORKSPACE.bazel
+++ /dev/null
@@ -1 +0,0 @@
-workspace(name = "fmt")
diff --git a/3party/fmt/support/build-docs.py b/3party/fmt/support/build-docs.py
deleted file mode 100755
index f1395cd..0000000
--- a/3party/fmt/support/build-docs.py
+++ /dev/null
@@ -1,58 +0,0 @@
-#!/usr/bin/env python
-# Build the documentation in CI.
-
-from __future__ import print_function
-import errno, os, shutil, subprocess, sys, urllib
-from subprocess import call, check_call, Popen, PIPE, STDOUT
-
-def rmtree_if_exists(dir):
-    try:
-        shutil.rmtree(dir)
-    except OSError as e:
-        if e.errno == errno.ENOENT:
-            pass
-
-# Build the docs.
-fmt_dir = os.path.dirname(os.path.dirname(os.path.realpath(__file__)))
-sys.path.insert(0, os.path.join(fmt_dir, 'doc'))
-import build
-build.create_build_env()
-html_dir = build.build_docs()
-
-repo = 'fmtlib.github.io'
-branch = os.environ['GITHUB_REF']
-is_ci = 'CI' in os.environ
-if is_ci and branch != 'refs/heads/master':
-    print('Branch: ' + branch)
-    exit(0) # Ignore non-master branches
-if is_ci and 'KEY' not in os.environ:
-    # Don't update the repo if building in CI from an account that doesn't have
-    # push access.
-    print('Skipping update of ' + repo)
-    exit(0)
-
-# Clone the fmtlib.github.io repo.
-rmtree_if_exists(repo)
-git_url = 'https://github.com/' if is_ci else 'git@github.com:'
-check_call(['git', 'clone', git_url + 'fmtlib/{}.git'.format(repo)])
-
-# Copy docs to the repo.
-target_dir = os.path.join(repo, 'dev')
-rmtree_if_exists(target_dir)
-shutil.copytree(html_dir, target_dir, ignore=shutil.ignore_patterns('.*'))
-if is_ci:
-    check_call(['git', 'config', '--global', 'user.name', 'fmtbot'])
-    check_call(['git', 'config', '--global', 'user.email', 'viz@fmt.dev'])
-
-# Push docs to GitHub pages.
-check_call(['git', 'add', '--all'], cwd=repo)
-if call(['git', 'diff-index', '--quiet', 'HEAD'], cwd=repo):
-    check_call(['git', 'commit', '-m', 'Update documentation'], cwd=repo)
-    cmd = 'git push'
-    if is_ci:
-        cmd += ' https://$KEY@github.com/fmtlib/fmtlib.github.io.git master'
-    p = Popen(cmd, shell=True, stdout=PIPE, stderr=STDOUT, cwd=repo)
-    # Print the output without the key.
-    print(p.communicate()[0].decode('utf-8').replace(os.environ['KEY'], '$KEY'))
-    if p.returncode != 0:
-        raise subprocess.CalledProcessError(p.returncode, cmd)
diff --git a/3party/fmt/support/build.gradle b/3party/fmt/support/build.gradle
deleted file mode 100644
index c5126d0..0000000
--- a/3party/fmt/support/build.gradle
+++ /dev/null
@@ -1,132 +0,0 @@
-import java.nio.file.Paths
-
-// General gradle arguments for root project
-buildscript {    
-    repositories {
-        google()
-        jcenter()
-    }
-    dependencies {
-        //
-        // https://developer.android.com/studio/releases/gradle-plugin#updating-gradle
-        //
-        // Notice that 4.0.0 here is the version of [Android Gradle Plugin]
-        // According to URL above you will need Gradle 6.1 or higher
-        //
-        classpath "com.android.tools.build:gradle:4.1.1"
-    }
-}
-repositories {
-    google()
-    jcenter()
-}
-
-// Project's root where CMakeLists.txt exists: rootDir/support/.cxx -> rootDir
-def rootDir = Paths.get(project.buildDir.getParent()).getParent()
-println("rootDir: ${rootDir}")
-
-// Output: Shared library (.so) for Android 
-apply plugin: "com.android.library"
-android {
-    compileSdkVersion 25    // Android 7.0
-
-    // Target ABI
-    //  - This option controls target platform of module
-    //  - The platform might be limited by compiler's support
-    //    some can work with Clang(default), but some can work only with GCC...
-    //    if bad, both toolchains might not support it
-    splits {
-        abi {
-            enable true
-            // Specify platforms for Application
-            reset()
-            include  "arm64-v8a", "armeabi-v7a", "x86_64"
-        }
-    }
-    ndkVersion "21.3.6528147" // ANDROID_NDK_HOME is deprecated. Be explicit
-
-    defaultConfig {
-        minSdkVersion 21    // Android 5.0+
-        targetSdkVersion 25 // Follow Compile SDK
-        versionCode 34      // Follow release count
-        versionName "7.1.2" // Follow Official version
-        
-        externalNativeBuild {
-            cmake {
-                arguments "-DANDROID_STL=c++_shared"    // Specify Android STL
-                arguments "-DBUILD_SHARED_LIBS=true"    // Build shared object
-                arguments "-DFMT_TEST=false"            // Skip test
-                arguments "-DFMT_DOC=false"             // Skip document
-                cppFlags  "-std=c++17"
-                targets   "fmt"
-            }
-        }
-        println(externalNativeBuild.cmake.cppFlags)
-        println(externalNativeBuild.cmake.arguments)
-    }
-
-    // External Native build
-    //  - Use existing CMakeList.txt
-    //  - Give path to CMake. This gradle file should be 
-    //    neighbor of the top level cmake
-    externalNativeBuild {
-        cmake {
-            version "3.10.0+"
-            path "${rootDir}/CMakeLists.txt"
-            // buildStagingDirectory "./build"  // Custom path for cmake output
-        }
-    }
-    
-    sourceSets{
-        // Android Manifest for Gradle
-        main {
-            manifest.srcFile "AndroidManifest.xml"
-        }
-    }
-
-    // https://developer.android.com/studio/build/native-dependencies#build_system_configuration
-    buildFeatures {
-        prefab true
-        prefabPublishing true
-    }
-    prefab {
-        fmt {
-            headers "${rootDir}/include"
-        }
-    }
-}
-
-assemble.doLast
-{
-    // Instead of `ninja install`, Gradle will deploy the files.
-    // We are doing this since FMT is dependent to the ANDROID_STL after build
-    copy {
-        from "build/intermediates/cmake"
-        into "${rootDir}/libs"
-    }
-    // Copy debug binaries
-    copy {
-        from "${rootDir}/libs/debug/obj"
-        into "${rootDir}/libs/debug"
-    }
-    // Copy Release binaries
-    copy {
-        from "${rootDir}/libs/release/obj"
-        into "${rootDir}/libs/release"
-    }
-    // Remove empty directory
-    delete "${rootDir}/libs/debug/obj"
-    delete "${rootDir}/libs/release/obj"
-
-    // Copy AAR files. Notice that the aar is named after the folder of this script.
-    copy {
-        from "build/outputs/aar/support-release.aar"
-        into "${rootDir}/libs"
-        rename "support-release.aar", "fmt-release.aar"
-    }
-    copy {
-        from "build/outputs/aar/support-debug.aar"
-        into "${rootDir}/libs"
-        rename "support-debug.aar", "fmt-debug.aar"
-    }
-}
diff --git a/3party/fmt/support/cmake/FindSetEnv.cmake b/3party/fmt/support/cmake/FindSetEnv.cmake
deleted file mode 100644
index 4e2da54..0000000
--- a/3party/fmt/support/cmake/FindSetEnv.cmake
+++ /dev/null
@@ -1,7 +0,0 @@
-# A CMake script to find SetEnv.cmd.
-
-find_program(WINSDK_SETENV NAMES SetEnv.cmd
-  PATHS "[HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Microsoft SDKs\\Windows;CurrentInstallFolder]/bin")
-if (WINSDK_SETENV AND PRINT_PATH)
-  execute_process(COMMAND ${CMAKE_COMMAND} -E echo "${WINSDK_SETENV}")
-endif ()
diff --git a/3party/fmt/support/cmake/JoinPaths.cmake b/3party/fmt/support/cmake/JoinPaths.cmake
deleted file mode 100644
index 32d6d66..0000000
--- a/3party/fmt/support/cmake/JoinPaths.cmake
+++ /dev/null
@@ -1,26 +0,0 @@
-# This module provides function for joining paths
-# known from from most languages
-#
-# Original license:
-# SPDX-License-Identifier: (MIT OR CC0-1.0)
-# Explicit permission given to distribute this module under
-# the terms of the project as described in /LICENSE.rst.
-# Copyright 2020 Jan Tojnar
-# https://github.com/jtojnar/cmake-snips
-#
-# Modelled after Python’s os.path.join
-# https://docs.python.org/3.7/library/os.path.html#os.path.join
-# Windows not supported
-function(join_paths joined_path first_path_segment)
-    set(temp_path "${first_path_segment}")
-    foreach(current_segment IN LISTS ARGN)
-        if(NOT ("${current_segment}" STREQUAL ""))
-            if(IS_ABSOLUTE "${current_segment}")
-                set(temp_path "${current_segment}")
-            else()
-                set(temp_path "${temp_path}/${current_segment}")
-            endif()
-        endif()
-    endforeach()
-    set(${joined_path} "${temp_path}" PARENT_SCOPE)
-endfunction()
diff --git a/3party/fmt/support/cmake/fmt-config.cmake.in b/3party/fmt/support/cmake/fmt-config.cmake.in
deleted file mode 100644
index bc1684f..0000000
--- a/3party/fmt/support/cmake/fmt-config.cmake.in
+++ /dev/null
@@ -1,7 +0,0 @@
-@PACKAGE_INIT@
-
-if (NOT TARGET fmt::fmt)
-  include(${CMAKE_CURRENT_LIST_DIR}/@targets_export_name@.cmake)
-endif ()
-
-check_required_components(fmt)
diff --git a/3party/fmt/support/cmake/fmt.pc.in b/3party/fmt/support/cmake/fmt.pc.in
deleted file mode 100644
index 29976a8..0000000
--- a/3party/fmt/support/cmake/fmt.pc.in
+++ /dev/null
@@ -1,11 +0,0 @@
-prefix=@CMAKE_INSTALL_PREFIX@
-exec_prefix=@CMAKE_INSTALL_PREFIX@
-libdir=@libdir_for_pc_file@
-includedir=@includedir_for_pc_file@
-
-Name: fmt
-Description: A modern formatting library
-Version: @FMT_VERSION@
-Libs: -L${libdir} -l@FMT_LIB_NAME@
-Cflags: -I${includedir}
-
diff --git a/3party/fmt/support/compute-powers.py b/3party/fmt/support/compute-powers.py
deleted file mode 100755
index 601063d..0000000
--- a/3party/fmt/support/compute-powers.py
+++ /dev/null
@@ -1,53 +0,0 @@
-#!/usr/bin/env python
-# Compute 10 ** exp with exp in the range [min_exponent, max_exponent] and print
-# normalized (with most-significant bit equal to 1) significands in hexadecimal.
-
-from __future__ import print_function
-
-min_exponent = -348
-max_exponent = 340
-step = 8
-significand_size = 64
-exp_offset = 2000
-
-class fp:
-    pass
-
-powers = []
-for i, exp in enumerate(range(min_exponent, max_exponent + 1, step)):
-    result = fp()
-    n = 10 ** exp if exp >= 0 else 2 ** exp_offset / 10 ** -exp
-    k = significand_size + 1
-    # Convert to binary and round.
-    binary = '{:b}'.format(n)
-    result.f = (int('{:0<{}}'.format(binary[:k], k), 2) + 1) / 2
-    result.e = len(binary) - (exp_offset if exp < 0 else 0) - significand_size
-    powers.append(result)
-    # Sanity check.
-    exp_offset10 = 400
-    actual = result.f * 10 ** exp_offset10
-    if result.e > 0:
-        actual *= 2 ** result.e
-    else:
-        for j in range(-result.e):
-            actual /= 2
-    expected = 10 ** (exp_offset10 + exp)
-    precision = len('{}'.format(expected)) - len('{}'.format(actual - expected))
-    if precision < 19:
-        print('low precision:', precision)
-        exit(1)
-
-print('Significands:', end='')
-for i, fp in enumerate(powers):
-    if i % 3 == 0:
-        print(end='\n ')
-    print(' {:0<#16x}'.format(fp.f, ), end=',')
-
-print('\n\nExponents:', end='')
-for i, fp in enumerate(powers):
-    if i % 11 == 0:
-        print(end='\n ')
-    print(' {:5}'.format(fp.e), end=',')
-
-print('\n\nMax exponent difference:',
-      max([x.e - powers[i - 1].e for i, x in enumerate(powers)][1:]))
diff --git a/3party/fmt/support/docopt.py b/3party/fmt/support/docopt.py
deleted file mode 100644
index 2e43f7c..0000000
--- a/3party/fmt/support/docopt.py
+++ /dev/null
@@ -1,581 +0,0 @@
-"""Pythonic command-line interface parser that will make you smile.
-
- * http://docopt.org
- * Repository and issue-tracker: https://github.com/docopt/docopt
- * Licensed under terms of MIT license (see LICENSE-MIT)
- * Copyright (c) 2013 Vladimir Keleshev, vladimir@keleshev.com
-
-"""
-import sys
-import re
-
-
-__all__ = ['docopt']
-__version__ = '0.6.1'
-
-
-class DocoptLanguageError(Exception):
-
-    """Error in construction of usage-message by developer."""
-
-
-class DocoptExit(SystemExit):
-
-    """Exit in case user invoked program with incorrect arguments."""
-
-    usage = ''
-
-    def __init__(self, message=''):
-        SystemExit.__init__(self, (message + '\n' + self.usage).strip())
-
-
-class Pattern(object):
-
-    def __eq__(self, other):
-        return repr(self) == repr(other)
-
-    def __hash__(self):
-        return hash(repr(self))
-
-    def fix(self):
-        self.fix_identities()
-        self.fix_repeating_arguments()
-        return self
-
-    def fix_identities(self, uniq=None):
-        """Make pattern-tree tips point to same object if they are equal."""
-        if not hasattr(self, 'children'):
-            return self
-        uniq = list(set(self.flat())) if uniq is None else uniq
-        for i, child in enumerate(self.children):
-            if not hasattr(child, 'children'):
-                assert child in uniq
-                self.children[i] = uniq[uniq.index(child)]
-            else:
-                child.fix_identities(uniq)
-
-    def fix_repeating_arguments(self):
-        """Fix elements that should accumulate/increment values."""
-        either = [list(child.children) for child in transform(self).children]
-        for case in either:
-            for e in [child for child in case if case.count(child) > 1]:
-                if type(e) is Argument or type(e) is Option and e.argcount:
-                    if e.value is None:
-                        e.value = []
-                    elif type(e.value) is not list:
-                        e.value = e.value.split()
-                if type(e) is Command or type(e) is Option and e.argcount == 0:
-                    e.value = 0
-        return self
-
-
-def transform(pattern):
-    """Expand pattern into an (almost) equivalent one, but with single Either.
-
-    Example: ((-a | -b) (-c | -d)) => (-a -c | -a -d | -b -c | -b -d)
-    Quirks: [-a] => (-a), (-a...) => (-a -a)
-
-    """
-    result = []
-    groups = [[pattern]]
-    while groups:
-        children = groups.pop(0)
-        parents = [Required, Optional, OptionsShortcut, Either, OneOrMore]
-        if any(t in map(type, children) for t in parents):
-            child = [c for c in children if type(c) in parents][0]
-            children.remove(child)
-            if type(child) is Either:
-                for c in child.children:
-                    groups.append([c] + children)
-            elif type(child) is OneOrMore:
-                groups.append(child.children * 2 + children)
-            else:
-                groups.append(child.children + children)
-        else:
-            result.append(children)
-    return Either(*[Required(*e) for e in result])
-
-
-class LeafPattern(Pattern):
-
-    """Leaf/terminal node of a pattern tree."""
-
-    def __init__(self, name, value=None):
-        self.name, self.value = name, value
-
-    def __repr__(self):
-        return '%s(%r, %r)' % (self.__class__.__name__, self.name, self.value)
-
-    def flat(self, *types):
-        return [self] if not types or type(self) in types else []
-
-    def match(self, left, collected=None):
-        collected = [] if collected is None else collected
-        pos, match = self.single_match(left)
-        if match is None:
-            return False, left, collected
-        left_ = left[:pos] + left[pos + 1:]
-        same_name = [a for a in collected if a.name == self.name]
-        if type(self.value) in (int, list):
-            if type(self.value) is int:
-                increment = 1
-            else:
-                increment = ([match.value] if type(match.value) is str
-                             else match.value)
-            if not same_name:
-                match.value = increment
-                return True, left_, collected + [match]
-            same_name[0].value += increment
-            return True, left_, collected
-        return True, left_, collected + [match]
-
-
-class BranchPattern(Pattern):
-
-    """Branch/inner node of a pattern tree."""
-
-    def __init__(self, *children):
-        self.children = list(children)
-
-    def __repr__(self):
-        return '%s(%s)' % (self.__class__.__name__,
-                           ', '.join(repr(a) for a in self.children))
-
-    def flat(self, *types):
-        if type(self) in types:
-            return [self]
-        return sum([child.flat(*types) for child in self.children], [])
-
-
-class Argument(LeafPattern):
-
-    def single_match(self, left):
-        for n, pattern in enumerate(left):
-            if type(pattern) is Argument:
-                return n, Argument(self.name, pattern.value)
-        return None, None
-
-    @classmethod
-    def parse(class_, source):
-        name = re.findall('(<\S*?>)', source)[0]
-        value = re.findall('\[default: (.*)\]', source, flags=re.I)
-        return class_(name, value[0] if value else None)
-
-
-class Command(Argument):
-
-    def __init__(self, name, value=False):
-        self.name, self.value = name, value
-
-    def single_match(self, left):
-        for n, pattern in enumerate(left):
-            if type(pattern) is Argument:
-                if pattern.value == self.name:
-                    return n, Command(self.name, True)
-                else:
-                    break
-        return None, None
-
-
-class Option(LeafPattern):
-
-    def __init__(self, short=None, long=None, argcount=0, value=False):
-        assert argcount in (0, 1)
-        self.short, self.long, self.argcount = short, long, argcount
-        self.value = None if value is False and argcount else value
-
-    @classmethod
-    def parse(class_, option_description):
-        short, long, argcount, value = None, None, 0, False
-        options, _, description = option_description.strip().partition('  ')
-        options = options.replace(',', ' ').replace('=', ' ')
-        for s in options.split():
-            if s.startswith('--'):
-                long = s
-            elif s.startswith('-'):
-                short = s
-            else:
-                argcount = 1
-        if argcount:
-            matched = re.findall('\[default: (.*)\]', description, flags=re.I)
-            value = matched[0] if matched else None
-        return class_(short, long, argcount, value)
-
-    def single_match(self, left):
-        for n, pattern in enumerate(left):
-            if self.name == pattern.name:
-                return n, pattern
-        return None, None
-
-    @property
-    def name(self):
-        return self.long or self.short
-
-    def __repr__(self):
-        return 'Option(%r, %r, %r, %r)' % (self.short, self.long,
-                                           self.argcount, self.value)
-
-
-class Required(BranchPattern):
-
-    def match(self, left, collected=None):
-        collected = [] if collected is None else collected
-        l = left
-        c = collected
-        for pattern in self.children:
-            matched, l, c = pattern.match(l, c)
-            if not matched:
-                return False, left, collected
-        return True, l, c
-
-
-class Optional(BranchPattern):
-
-    def match(self, left, collected=None):
-        collected = [] if collected is None else collected
-        for pattern in self.children:
-            m, left, collected = pattern.match(left, collected)
-        return True, left, collected
-
-
-class OptionsShortcut(Optional):
-
-    """Marker/placeholder for [options] shortcut."""
-
-
-class OneOrMore(BranchPattern):
-
-    def match(self, left, collected=None):
-        assert len(self.children) == 1
-        collected = [] if collected is None else collected
-        l = left
-        c = collected
-        l_ = None
-        matched = True
-        times = 0
-        while matched:
-            # could it be that something didn't match but changed l or c?
-            matched, l, c = self.children[0].match(l, c)
-            times += 1 if matched else 0
-            if l_ == l:
-                break
-            l_ = l
-        if times >= 1:
-            return True, l, c
-        return False, left, collected
-
-
-class Either(BranchPattern):
-
-    def match(self, left, collected=None):
-        collected = [] if collected is None else collected
-        outcomes = []
-        for pattern in self.children:
-            matched, _, _ = outcome = pattern.match(left, collected)
-            if matched:
-                outcomes.append(outcome)
-        if outcomes:
-            return min(outcomes, key=lambda outcome: len(outcome[1]))
-        return False, left, collected
-
-
-class Tokens(list):
-
-    def __init__(self, source, error=DocoptExit):
-        self += source.split() if hasattr(source, 'split') else source
-        self.error = error
-
-    @staticmethod
-    def from_pattern(source):
-        source = re.sub(r'([\[\]\(\)\|]|\.\.\.)', r' \1 ', source)
-        source = [s for s in re.split('\s+|(\S*<.*?>)', source) if s]
-        return Tokens(source, error=DocoptLanguageError)
-
-    def move(self):
-        return self.pop(0) if len(self) else None
-
-    def current(self):
-        return self[0] if len(self) else None
-
-
-def parse_long(tokens, options):
-    """long ::= '--' chars [ ( ' ' | '=' ) chars ] ;"""
-    long, eq, value = tokens.move().partition('=')
-    assert long.startswith('--')
-    value = None if eq == value == '' else value
-    similar = [o for o in options if o.long == long]
-    if tokens.error is DocoptExit and similar == []:  # if no exact match
-        similar = [o for o in options if o.long and o.long.startswith(long)]
-    if len(similar) > 1:  # might be simply specified ambiguously 2+ times?
-        raise tokens.error('%s is not a unique prefix: %s?' %
-                           (long, ', '.join(o.long for o in similar)))
-    elif len(similar) < 1:
-        argcount = 1 if eq == '=' else 0
-        o = Option(None, long, argcount)
-        options.append(o)
-        if tokens.error is DocoptExit:
-            o = Option(None, long, argcount, value if argcount else True)
-    else:
-        o = Option(similar[0].short, similar[0].long,
-                   similar[0].argcount, similar[0].value)
-        if o.argcount == 0:
-            if value is not None:
-                raise tokens.error('%s must not have an argument' % o.long)
-        else:
-            if value is None:
-                if tokens.current() in [None, '--']:
-                    raise tokens.error('%s requires argument' % o.long)
-                value = tokens.move()
-        if tokens.error is DocoptExit:
-            o.value = value if value is not None else True
-    return [o]
-
-
-def parse_shorts(tokens, options):
-    """shorts ::= '-' ( chars )* [ [ ' ' ] chars ] ;"""
-    token = tokens.move()
-    assert token.startswith('-') and not token.startswith('--')
-    left = token.lstrip('-')
-    parsed = []
-    while left != '':
-        short, left = '-' + left[0], left[1:]
-        similar = [o for o in options if o.short == short]
-        if len(similar) > 1:
-            raise tokens.error('%s is specified ambiguously %d times' %
-                               (short, len(similar)))
-        elif len(similar) < 1:
-            o = Option(short, None, 0)
-            options.append(o)
-            if tokens.error is DocoptExit:
-                o = Option(short, None, 0, True)
-        else:  # why copying is necessary here?
-            o = Option(short, similar[0].long,
-                       similar[0].argcount, similar[0].value)
-            value = None
-            if o.argcount != 0:
-                if left == '':
-                    if tokens.current() in [None, '--']:
-                        raise tokens.error('%s requires argument' % short)
-                    value = tokens.move()
-                else:
-                    value = left
-                    left = ''
-            if tokens.error is DocoptExit:
-                o.value = value if value is not None else True
-        parsed.append(o)
-    return parsed
-
-
-def parse_pattern(source, options):
-    tokens = Tokens.from_pattern(source)
-    result = parse_expr(tokens, options)
-    if tokens.current() is not None:
-        raise tokens.error('unexpected ending: %r' % ' '.join(tokens))
-    return Required(*result)
-
-
-def parse_expr(tokens, options):
-    """expr ::= seq ( '|' seq )* ;"""
-    seq = parse_seq(tokens, options)
-    if tokens.current() != '|':
-        return seq
-    result = [Required(*seq)] if len(seq) > 1 else seq
-    while tokens.current() == '|':
-        tokens.move()
-        seq = parse_seq(tokens, options)
-        result += [Required(*seq)] if len(seq) > 1 else seq
-    return [Either(*result)] if len(result) > 1 else result
-
-
-def parse_seq(tokens, options):
-    """seq ::= ( atom [ '...' ] )* ;"""
-    result = []
-    while tokens.current() not in [None, ']', ')', '|']:
-        atom = parse_atom(tokens, options)
-        if tokens.current() == '...':
-            atom = [OneOrMore(*atom)]
-            tokens.move()
-        result += atom
-    return result
-
-
-def parse_atom(tokens, options):
-    """atom ::= '(' expr ')' | '[' expr ']' | 'options'
-             | long | shorts | argument | command ;
-    """
-    token = tokens.current()
-    result = []
-    if token in '([':
-        tokens.move()
-        matching, pattern = {'(': [')', Required], '[': [']', Optional]}[token]
-        result = pattern(*parse_expr(tokens, options))
-        if tokens.move() != matching:
-            raise tokens.error("unmatched '%s'" % token)
-        return [result]
-    elif token == 'options':
-        tokens.move()
-        return [OptionsShortcut()]
-    elif token.startswith('--') and token != '--':
-        return parse_long(tokens, options)
-    elif token.startswith('-') and token not in ('-', '--'):
-        return parse_shorts(tokens, options)
-    elif token.startswith('<') and token.endswith('>') or token.isupper():
-        return [Argument(tokens.move())]
-    else:
-        return [Command(tokens.move())]
-
-
-def parse_argv(tokens, options, options_first=False):
-    """Parse command-line argument vector.
-
-    If options_first:
-        argv ::= [ long | shorts ]* [ argument ]* [ '--' [ argument ]* ] ;
-    else:
-        argv ::= [ long | shorts | argument ]* [ '--' [ argument ]* ] ;
-
-    """
-    parsed = []
-    while tokens.current() is not None:
-        if tokens.current() == '--':
-            return parsed + [Argument(None, v) for v in tokens]
-        elif tokens.current().startswith('--'):
-            parsed += parse_long(tokens, options)
-        elif tokens.current().startswith('-') and tokens.current() != '-':
-            parsed += parse_shorts(tokens, options)
-        elif options_first:
-            return parsed + [Argument(None, v) for v in tokens]
-        else:
-            parsed.append(Argument(None, tokens.move()))
-    return parsed
-
-
-def parse_defaults(doc):
-    defaults = []
-    for s in parse_section('options:', doc):
-        # FIXME corner case "bla: options: --foo"
-        _, _, s = s.partition(':')  # get rid of "options:"
-        split = re.split('\n[ \t]*(-\S+?)', '\n' + s)[1:]
-        split = [s1 + s2 for s1, s2 in zip(split[::2], split[1::2])]
-        options = [Option.parse(s) for s in split if s.startswith('-')]
-        defaults += options
-    return defaults
-
-
-def parse_section(name, source):
-    pattern = re.compile('^([^\n]*' + name + '[^\n]*\n?(?:[ \t].*?(?:\n|$))*)',
-                         re.IGNORECASE | re.MULTILINE)
-    return [s.strip() for s in pattern.findall(source)]
-
-
-def formal_usage(section):
-    _, _, section = section.partition(':')  # drop "usage:"
-    pu = section.split()
-    return '( ' + ' '.join(') | (' if s == pu[0] else s for s in pu[1:]) + ' )'
-
-
-def extras(help, version, options, doc):
-    if help and any((o.name in ('-h', '--help')) and o.value for o in options):
-        print(doc.strip("\n"))
-        sys.exit()
-    if version and any(o.name == '--version' and o.value for o in options):
-        print(version)
-        sys.exit()
-
-
-class Dict(dict):
-    def __repr__(self):
-        return '{%s}' % ',\n '.join('%r: %r' % i for i in sorted(self.items()))
-
-
-def docopt(doc, argv=None, help=True, version=None, options_first=False):
-    """Parse `argv` based on command-line interface described in `doc`.
-
-    `docopt` creates your command-line interface based on its
-    description that you pass as `doc`. Such description can contain
-    --options, <positional-argument>, commands, which could be
-    [optional], (required), (mutually | exclusive) or repeated...
-
-    Parameters
-    ----------
-    doc : str
-        Description of your command-line interface.
-    argv : list of str, optional
-        Argument vector to be parsed. sys.argv[1:] is used if not
-        provided.
-    help : bool (default: True)
-        Set to False to disable automatic help on -h or --help
-        options.
-    version : any object
-        If passed, the object will be printed if --version is in
-        `argv`.
-    options_first : bool (default: False)
-        Set to True to require options precede positional arguments,
-        i.e. to forbid options and positional arguments intermix.
-
-    Returns
-    -------
-    args : dict
-        A dictionary, where keys are names of command-line elements
-        such as e.g. "--verbose" and "<path>", and values are the
-        parsed values of those elements.
-
-    Example
-    -------
-    >>> from docopt import docopt
-    >>> doc = '''
-    ... Usage:
-    ...     my_program tcp <host> <port> [--timeout=<seconds>]
-    ...     my_program serial <port> [--baud=<n>] [--timeout=<seconds>]
-    ...     my_program (-h | --help | --version)
-    ...
-    ... Options:
-    ...     -h, --help  Show this screen and exit.
-    ...     --baud=<n>  Baudrate [default: 9600]
-    ... '''
-    >>> argv = ['tcp', '127.0.0.1', '80', '--timeout', '30']
-    >>> docopt(doc, argv)
-    {'--baud': '9600',
-     '--help': False,
-     '--timeout': '30',
-     '--version': False,
-     '<host>': '127.0.0.1',
-     '<port>': '80',
-     'serial': False,
-     'tcp': True}
-
-    See also
-    --------
-    * For video introduction see http://docopt.org
-    * Full documentation is available in README.rst as well as online
-      at https://github.com/docopt/docopt#readme
-
-    """
-    argv = sys.argv[1:] if argv is None else argv
-
-    usage_sections = parse_section('usage:', doc)
-    if len(usage_sections) == 0:
-        raise DocoptLanguageError('"usage:" (case-insensitive) not found.')
-    if len(usage_sections) > 1:
-        raise DocoptLanguageError('More than one "usage:" (case-insensitive).')
-    DocoptExit.usage = usage_sections[0]
-
-    options = parse_defaults(doc)
-    pattern = parse_pattern(formal_usage(DocoptExit.usage), options)
-    # [default] syntax for argument is disabled
-    #for a in pattern.flat(Argument):
-    #    same_name = [d for d in arguments if d.name == a.name]
-    #    if same_name:
-    #        a.value = same_name[0].value
-    argv = parse_argv(Tokens(argv), list(options), options_first)
-    pattern_options = set(pattern.flat(Option))
-    for options_shortcut in pattern.flat(OptionsShortcut):
-        doc_options = parse_defaults(doc)
-        options_shortcut.children = list(set(doc_options) - pattern_options)
-        #if any_options:
-        #    options_shortcut.children += [Option(o.short, o.long, o.argcount)
-        #                    for o in argv if type(o) is Option]
-    extras(help, version, argv, doc)
-    matched, left, collected = pattern.fix().match(argv)
-    if matched and left == []:  # better error message if left?
-        return Dict((a.name, a.value) for a in (pattern.flat() + collected))
-    raise DocoptExit()
diff --git a/3party/fmt/support/manage.py b/3party/fmt/support/manage.py
deleted file mode 100755
index cfb4979..0000000
--- a/3party/fmt/support/manage.py
+++ /dev/null
@@ -1,329 +0,0 @@
-#!/usr/bin/env python3
-
-"""Manage site and releases.
-
-Usage:
-  manage.py release [<branch>]
-  manage.py site
-
-For the release command $FMT_TOKEN should contain a GitHub personal access token
-obtained from https://github.com/settings/tokens.
-"""
-
-from __future__ import print_function
-import datetime, docopt, errno, fileinput, json, os
-import re, requests, shutil, sys
-from contextlib import contextmanager
-from distutils.version import LooseVersion
-from subprocess import check_call
-
-
-class Git:
-    def __init__(self, dir):
-        self.dir = dir
-
-    def call(self, method, args, **kwargs):
-        return check_call(['git', method] + list(args), **kwargs)
-
-    def add(self, *args):
-        return self.call('add', args, cwd=self.dir)
-
-    def checkout(self, *args):
-        return self.call('checkout', args, cwd=self.dir)
-
-    def clean(self, *args):
-        return self.call('clean', args, cwd=self.dir)
-
-    def clone(self, *args):
-        return self.call('clone', list(args) + [self.dir])
-
-    def commit(self, *args):
-        return self.call('commit', args, cwd=self.dir)
-
-    def pull(self, *args):
-        return self.call('pull', args, cwd=self.dir)
-
-    def push(self, *args):
-        return self.call('push', args, cwd=self.dir)
-
-    def reset(self, *args):
-        return self.call('reset', args, cwd=self.dir)
-
-    def update(self, *args):
-        clone = not os.path.exists(self.dir)
-        if clone:
-            self.clone(*args)
-        return clone
-
-
-def clean_checkout(repo, branch):
-    repo.clean('-f', '-d')
-    repo.reset('--hard')
-    repo.checkout(branch)
-
-
-class Runner:
-    def __init__(self, cwd):
-        self.cwd = cwd
-
-    def __call__(self, *args, **kwargs):
-        kwargs['cwd'] = kwargs.get('cwd', self.cwd)
-        check_call(args, **kwargs)
-
-
-def create_build_env():
-    """Create a build environment."""
-    class Env:
-        pass
-    env = Env()
-
-    # Import the documentation build module.
-    env.fmt_dir = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
-    sys.path.insert(0, os.path.join(env.fmt_dir, 'doc'))
-    import build
-
-    env.build_dir = 'build'
-    env.versions = build.versions
-
-    # Virtualenv and repos are cached to speed up builds.
-    build.create_build_env(os.path.join(env.build_dir, 'virtualenv'))
-
-    env.fmt_repo = Git(os.path.join(env.build_dir, 'fmt'))
-    return env
-
-
-@contextmanager
-def rewrite(filename):
-    class Buffer:
-        pass
-    buffer = Buffer()
-    if not os.path.exists(filename):
-        buffer.data = ''
-        yield buffer
-        return
-    with open(filename) as f:
-        buffer.data = f.read()
-    yield buffer
-    with open(filename, 'w') as f:
-        f.write(buffer.data)
-
-
-fmt_repo_url = 'git@github.com:fmtlib/fmt'
-
-
-def update_site(env):
-    env.fmt_repo.update(fmt_repo_url)
-
-    doc_repo = Git(os.path.join(env.build_dir, 'fmtlib.github.io'))
-    doc_repo.update('git@github.com:fmtlib/fmtlib.github.io')
-
-    for version in env.versions:
-        clean_checkout(env.fmt_repo, version)
-        target_doc_dir = os.path.join(env.fmt_repo.dir, 'doc')
-        # Remove the old theme.
-        for entry in os.listdir(target_doc_dir):
-            path = os.path.join(target_doc_dir, entry)
-            if os.path.isdir(path):
-                shutil.rmtree(path)
-        # Copy the new theme.
-        for entry in ['_static', '_templates', 'basic-bootstrap', 'bootstrap',
-                      'conf.py', 'fmt.less']:
-            src = os.path.join(env.fmt_dir, 'doc', entry)
-            dst = os.path.join(target_doc_dir, entry)
-            copy = shutil.copytree if os.path.isdir(src) else shutil.copyfile
-            copy(src, dst)
-        # Rename index to contents.
-        contents = os.path.join(target_doc_dir, 'contents.rst')
-        if not os.path.exists(contents):
-            os.rename(os.path.join(target_doc_dir, 'index.rst'), contents)
-        # Fix issues in reference.rst/api.rst.
-        for filename in ['reference.rst', 'api.rst', 'index.rst']:
-            pattern = re.compile('doxygenfunction.. (bin|oct|hexu|hex)$', re.M)
-            with rewrite(os.path.join(target_doc_dir, filename)) as b:
-                b.data = b.data.replace('std::ostream &', 'std::ostream&')
-                b.data = re.sub(pattern, r'doxygenfunction:: \1(int)', b.data)
-                b.data = b.data.replace('std::FILE*', 'std::FILE *')
-                b.data = b.data.replace('unsigned int', 'unsigned')
-                #b.data = b.data.replace('operator""_', 'operator"" _')
-                b.data = b.data.replace(
-                    'format_to_n(OutputIt, size_t, string_view, Args&&',
-                    'format_to_n(OutputIt, size_t, const S&, const Args&')
-                b.data = b.data.replace(
-                    'format_to_n(OutputIt, std::size_t, string_view, Args&&',
-                    'format_to_n(OutputIt, std::size_t, const S&, const Args&')
-                if version == ('3.0.2'):
-                    b.data = b.data.replace(
-                        'fprintf(std::ostream&', 'fprintf(std::ostream &')
-                if version == ('5.3.0'):
-                    b.data = b.data.replace(
-                        'format_to(OutputIt, const S&, const Args&...)',
-                        'format_to(OutputIt, const S &, const Args &...)')
-                if version.startswith('5.') or version.startswith('6.'):
-                    b.data = b.data.replace(', size_t', ', std::size_t')
-                if version.startswith('7.'):
-                    b.data = b.data.replace(', std::size_t', ', size_t')
-                    b.data = b.data.replace('join(It, It', 'join(It, Sentinel')
-                if version.startswith('7.1.'):
-                    b.data = b.data.replace(', std::size_t', ', size_t')
-                    b.data = b.data.replace('join(It, It', 'join(It, Sentinel')
-                    b.data = b.data.replace(
-                        'fmt::format_to(OutputIt, const S&, Args&&...)',
-                        'fmt::format_to(OutputIt, const S&, Args&&...) -> ' +
-                        'typename std::enable_if<enable, OutputIt>::type')
-                b.data = b.data.replace('aa long', 'a long')
-                b.data = b.data.replace('serveral', 'several')
-                if version.startswith('6.2.'):
-                    b.data = b.data.replace(
-                        'vformat(const S&, basic_format_args<' +
-                        'buffer_context<Char>>)',
-                        'vformat(const S&, basic_format_args<' +
-                        'buffer_context<type_identity_t<Char>>>)')
-        # Fix a broken link in index.rst.
-        index = os.path.join(target_doc_dir, 'index.rst')
-        with rewrite(index) as b:
-            b.data = b.data.replace(
-                'doc/latest/index.html#format-string-syntax', 'syntax.html')
-        # Fix issues in syntax.rst.
-        index = os.path.join(target_doc_dir, 'syntax.rst')
-        with rewrite(index) as b:
-            b.data = b.data.replace(
-                '..productionlist:: sf\n', '.. productionlist:: sf\n ')
-            b.data = b.data.replace('Examples:\n', 'Examples::\n')
-        # Build the docs.
-        html_dir = os.path.join(env.build_dir, 'html')
-        if os.path.exists(html_dir):
-            shutil.rmtree(html_dir)
-        include_dir = env.fmt_repo.dir
-        if LooseVersion(version) >= LooseVersion('5.0.0'):
-            include_dir = os.path.join(include_dir, 'include', 'fmt')
-        elif LooseVersion(version) >= LooseVersion('3.0.0'):
-            include_dir = os.path.join(include_dir, 'fmt')
-        import build
-        build.build_docs(version, doc_dir=target_doc_dir,
-                         include_dir=include_dir, work_dir=env.build_dir)
-        shutil.rmtree(os.path.join(html_dir, '.doctrees'))
-        # Create symlinks for older versions.
-        for link, target in {'index': 'contents', 'api': 'reference'}.items():
-            link = os.path.join(html_dir, link) + '.html'
-            target += '.html'
-            if os.path.exists(os.path.join(html_dir, target)) and \
-               not os.path.exists(link):
-                os.symlink(target, link)
-        # Copy docs to the website.
-        version_doc_dir = os.path.join(doc_repo.dir, version)
-        try:
-            shutil.rmtree(version_doc_dir)
-        except OSError as e:
-            if e.errno != errno.ENOENT:
-                raise
-        shutil.move(html_dir, version_doc_dir)
-
-
-def release(args):
-    env = create_build_env()
-    fmt_repo = env.fmt_repo
-
-    branch = args.get('<branch>')
-    if branch is None:
-        branch = 'master'
-    if not fmt_repo.update('-b', branch, fmt_repo_url):
-        clean_checkout(fmt_repo, branch)
-
-    # Update the date in the changelog and extract the version and the first
-    # section content.
-    changelog = 'ChangeLog.md'
-    changelog_path = os.path.join(fmt_repo.dir, changelog)
-    is_first_section = True
-    first_section = []
-    for i, line in enumerate(fileinput.input(changelog_path, inplace=True)):
-        if i == 0:
-            version = re.match(r'# (.*) - TBD', line).group(1)
-            line = '# {} - {}\n'.format(
-                version, datetime.date.today().isoformat())
-        elif not is_first_section:
-            pass
-        elif line.startswith('#'):
-            is_first_section = False
-        else:
-            first_section.append(line)
-        sys.stdout.write(line)
-    if first_section[0] == '\n':
-        first_section.pop(0)
-
-    changes = ''
-    code_block = False
-    stripped = False
-    for line in first_section:
-        if re.match(r'^\s*```', line):
-            code_block = not code_block
-            changes += line
-            stripped = False
-            continue
-        if code_block:
-            changes += line
-            continue
-        if line == '\n':
-            changes += line
-            if stripped:
-                changes += line
-                stripped = False
-            continue
-        if stripped:
-            line = ' ' + line.lstrip()
-        changes += line.rstrip()
-        stripped = True
-
-    cmakelists = 'CMakeLists.txt'
-    for line in fileinput.input(os.path.join(fmt_repo.dir, cmakelists),
-                                inplace=True):
-        prefix = 'set(FMT_VERSION '
-        if line.startswith(prefix):
-            line = prefix + version + ')\n'
-        sys.stdout.write(line)
-
-    # Add the version to the build script.
-    script = os.path.join('doc', 'build.py')
-    script_path = os.path.join(fmt_repo.dir, script)
-    for line in fileinput.input(script_path, inplace=True):
-      m = re.match(r'( *versions \+= )\[(.+)\]', line)
-      if m:
-        line = '{}[{}, \'{}\']\n'.format(m.group(1), m.group(2), version)
-      sys.stdout.write(line)
-
-    fmt_repo.checkout('-B', 'release')
-    fmt_repo.add(changelog, cmakelists, script)
-    fmt_repo.commit('-m', 'Update version')
-
-    # Build the docs and package.
-    run = Runner(fmt_repo.dir)
-    run('cmake', '.')
-    run('make', 'doc', 'package_source')
-    update_site(env)
-
-    # Create a release on GitHub.
-    fmt_repo.push('origin', 'release')
-    auth_headers = {'Authorization': 'token ' + os.getenv('FMT_TOKEN')}
-    r = requests.post('https://api.github.com/repos/fmtlib/fmt/releases',
-                      headers=auth_headers,
-                      data=json.dumps({'tag_name': version,
-                                       'target_commitish': 'release',
-                                       'body': changes, 'draft': True}))
-    if r.status_code != 201:
-        raise Exception('Failed to create a release ' + str(r))
-    id = r.json()['id']
-    uploads_url = 'https://uploads.github.com/repos/fmtlib/fmt/releases'
-    package = 'fmt-{}.zip'.format(version)
-    r = requests.post(
-        '{}/{}/assets?name={}'.format(uploads_url, id, package),
-        headers={'Content-Type': 'application/zip'} | auth_headers,
-        data=open('build/fmt/' + package, 'rb'))
-    if r.status_code != 201:
-        raise Exception('Failed to upload an asset ' + str(r))
-
-
-if __name__ == '__main__':
-    args = docopt.docopt(__doc__)
-    if args.get('release'):
-        release(args)
-    elif args.get('site'):
-        update_site(create_build_env())
diff --git a/3party/fmt/support/printable.py b/3party/fmt/support/printable.py
deleted file mode 100755
index 8fa86b3..0000000
--- a/3party/fmt/support/printable.py
+++ /dev/null
@@ -1,201 +0,0 @@
-#!/usr/bin/env python3
-
-# This script is based on
-# https://github.com/rust-lang/rust/blob/master/library/core/src/unicode/printable.py
-# distributed under https://github.com/rust-lang/rust/blob/master/LICENSE-MIT.
-
-# This script uses the following Unicode tables:
-# - UnicodeData.txt
-
-
-from collections import namedtuple
-import csv
-import os
-import subprocess
-
-NUM_CODEPOINTS=0x110000
-
-def to_ranges(iter):
-    current = None
-    for i in iter:
-        if current is None or i != current[1] or i in (0x10000, 0x20000):
-            if current is not None:
-                yield tuple(current)
-            current = [i, i + 1]
-        else:
-            current[1] += 1
-    if current is not None:
-        yield tuple(current)
-
-def get_escaped(codepoints):
-    for c in codepoints:
-        if (c.class_ or "Cn") in "Cc Cf Cs Co Cn Zl Zp Zs".split() and c.value != ord(' '):
-            yield c.value
-
-def get_file(f):
-    try:
-        return open(os.path.basename(f))
-    except FileNotFoundError:
-        subprocess.run(["curl", "-O", f], check=True)
-        return open(os.path.basename(f))
-
-Codepoint = namedtuple('Codepoint', 'value class_')
-
-def get_codepoints(f):
-    r = csv.reader(f, delimiter=";")
-    prev_codepoint = 0
-    class_first = None
-    for row in r:
-        codepoint = int(row[0], 16)
-        name = row[1]
-        class_ = row[2]
-
-        if class_first is not None:
-            if not name.endswith("Last>"):
-                raise ValueError("Missing Last after First")
-
-        for c in range(prev_codepoint + 1, codepoint):
-            yield Codepoint(c, class_first)
-
-        class_first = None
-        if name.endswith("First>"):
-            class_first = class_
-
-        yield Codepoint(codepoint, class_)
-        prev_codepoint = codepoint
-
-    if class_first is not None:
-        raise ValueError("Missing Last after First")
-
-    for c in range(prev_codepoint + 1, NUM_CODEPOINTS):
-        yield Codepoint(c, None)
-
-def compress_singletons(singletons):
-    uppers = [] # (upper, # items in lowers)
-    lowers = []
-
-    for i in singletons:
-        upper = i >> 8
-        lower = i & 0xff
-        if len(uppers) == 0 or uppers[-1][0] != upper:
-            uppers.append((upper, 1))
-        else:
-            upper, count = uppers[-1]
-            uppers[-1] = upper, count + 1
-        lowers.append(lower)
-
-    return uppers, lowers
-
-def compress_normal(normal):
-    # lengths 0x00..0x7f are encoded as 00, 01, ..., 7e, 7f
-    # lengths 0x80..0x7fff are encoded as 80 80, 80 81, ..., ff fe, ff ff
-    compressed = [] # [truelen, (truelenaux), falselen, (falselenaux)]
-
-    prev_start = 0
-    for start, count in normal:
-        truelen = start - prev_start
-        falselen = count
-        prev_start = start + count
-
-        assert truelen < 0x8000 and falselen < 0x8000
-        entry = []
-        if truelen > 0x7f:
-            entry.append(0x80 | (truelen >> 8))
-            entry.append(truelen & 0xff)
-        else:
-            entry.append(truelen & 0x7f)
-        if falselen > 0x7f:
-            entry.append(0x80 | (falselen >> 8))
-            entry.append(falselen & 0xff)
-        else:
-            entry.append(falselen & 0x7f)
-
-        compressed.append(entry)
-
-    return compressed
-
-def print_singletons(uppers, lowers, uppersname, lowersname):
-    print("  static constexpr singleton {}[] = {{".format(uppersname))
-    for u, c in uppers:
-        print("    {{{:#04x}, {}}},".format(u, c))
-    print("  };")
-    print("  static constexpr unsigned char {}[] = {{".format(lowersname))
-    for i in range(0, len(lowers), 8):
-        print("    {}".format(" ".join("{:#04x},".format(l) for l in lowers[i:i+8])))
-    print("  };")
-
-def print_normal(normal, normalname):
-    print("  static constexpr unsigned char {}[] = {{".format(normalname))
-    for v in normal:
-        print("    {}".format(" ".join("{:#04x},".format(i) for i in v)))
-    print("  };")
-
-def main():
-    file = get_file("https://www.unicode.org/Public/UNIDATA/UnicodeData.txt")
-
-    codepoints = get_codepoints(file)
-
-    CUTOFF=0x10000
-    singletons0 = []
-    singletons1 = []
-    normal0 = []
-    normal1 = []
-    extra = []
-
-    for a, b in to_ranges(get_escaped(codepoints)):
-        if a > 2 * CUTOFF:
-            extra.append((a, b - a))
-        elif a == b - 1:
-            if a & CUTOFF:
-                singletons1.append(a & ~CUTOFF)
-            else:
-                singletons0.append(a)
-        elif a == b - 2:
-            if a & CUTOFF:
-                singletons1.append(a & ~CUTOFF)
-                singletons1.append((a + 1) & ~CUTOFF)
-            else:
-                singletons0.append(a)
-                singletons0.append(a + 1)
-        else:
-            if a >= 2 * CUTOFF:
-                extra.append((a, b - a))
-            elif a & CUTOFF:
-                normal1.append((a & ~CUTOFF, b - a))
-            else:
-                normal0.append((a, b - a))
-
-    singletons0u, singletons0l = compress_singletons(singletons0)
-    singletons1u, singletons1l = compress_singletons(singletons1)
-    normal0 = compress_normal(normal0)
-    normal1 = compress_normal(normal1)
-
-    print("""\
-FMT_FUNC auto is_printable(uint32_t cp) -> bool {\
-""")
-    print_singletons(singletons0u, singletons0l, 'singletons0', 'singletons0_lower')
-    print_singletons(singletons1u, singletons1l, 'singletons1', 'singletons1_lower')
-    print_normal(normal0, 'normal0')
-    print_normal(normal1, 'normal1')
-    print("""\
-  auto lower = static_cast<uint16_t>(cp);
-  if (cp < 0x10000) {
-    return is_printable(lower, singletons0,
-                        sizeof(singletons0) / sizeof(*singletons0),
-                        singletons0_lower, normal0, sizeof(normal0));
-  }
-  if (cp < 0x20000) {
-    return is_printable(lower, singletons1,
-                        sizeof(singletons1) / sizeof(*singletons1),
-                        singletons1_lower, normal1, sizeof(normal1));
-  }\
-""")
-    for a, b in extra:
-        print("  if (0x{:x} <= cp && cp < 0x{:x}) return false;".format(a, a + b))
-    print("""\
-  return cp < 0x{:x};
-}}\
-""".format(NUM_CODEPOINTS))
-
-if __name__ == '__main__':
-    main()
diff --git a/3party/fmt/support/rtd/conf.py b/3party/fmt/support/rtd/conf.py
deleted file mode 100644
index 124fb9d..0000000
--- a/3party/fmt/support/rtd/conf.py
+++ /dev/null
@@ -1,7 +0,0 @@
-# Sphinx configuration for readthedocs.
-
-import os, sys
-
-master_doc = 'index'
-html_theme = 'theme'
-html_theme_path = ["."]
diff --git a/3party/fmt/support/rtd/index.rst b/3party/fmt/support/rtd/index.rst
deleted file mode 100644
index 7c88322..0000000
--- a/3party/fmt/support/rtd/index.rst
+++ /dev/null
@@ -1,2 +0,0 @@
-If you are not redirected automatically, follow the
-`link to the fmt documentation <https://fmt.dev/latest/>`_.
diff --git a/3party/fmt/support/rtd/theme/layout.html b/3party/fmt/support/rtd/theme/layout.html
deleted file mode 100644
index 29ebc55..0000000
--- a/3party/fmt/support/rtd/theme/layout.html
+++ /dev/null
@@ -1,17 +0,0 @@
-{% extends "basic/layout.html" %}
-
-{% block extrahead %}
-<meta charset="UTF-8">
-<meta http-equiv="refresh" content="1;url=https://fmt.dev/latest/">
-<script type="text/javascript">
-    window.location.href = "https://fmt.dev/latest/"
-</script>
-<title>Page Redirection</title>
-{% endblock %}
-
-{% block document %}
-If you are not redirected automatically, follow the <a href='https://fmt.dev/latest/'>link to the fmt documentation</a>.
-{% endblock %}
-
-{% block footer %}
-{% endblock %}
diff --git a/3party/fmt/support/rtd/theme/theme.conf b/3party/fmt/support/rtd/theme/theme.conf
deleted file mode 100644
index 89e03bb..0000000
--- a/3party/fmt/support/rtd/theme/theme.conf
+++ /dev/null
@@ -1,2 +0,0 @@
-[theme]
-inherit = basic