update examples

README.md

@@ -128,7 +128,6 @@ CPMAddPackage(
   NAME lua
   GIT_REPOSITORY https://github.com/lua/lua.git
   VERSION 5-3-4
-  GIT_SHALLOW YES
   DOWNLOAD_ONLY YES
 )
 

examples/doctest/CMakeLists.txt

@@ -19,7 +19,6 @@ CPMAddPackage(
   GIT_REPOSITORY https://github.com/onqtam/doctest.git
   VERSION 2.3.2
   GIT_TAG 2.3.2
-  GIT_SHALLOW True
 )
 
 # ---- Create binary ----

examples/json/CMakeLists.txt

@@ -0,0 +1,22 @@
+cmake_minimum_required(VERSION 3.14 FATAL_ERROR)
+
+# ---- Dependencies ----
+
+include(../../cmake/CPM.cmake)
+
+CPMAddPackage(
+  NAME nlohmann_json
+  VERSION 3.6.1  
+  # not using the git as it takes forever to clone
+  URL https://github.com/nlohmann/json/releases/download/v3.6.1/include.zip
+  URL_HASH SHA256=69cc88207ce91347ea530b227ff0776db82dcb8de6704e1a3d74f4841bc651cf
+)
+
+add_library(nlohmann_json INTERFACE)
+target_include_directories(nlohmann_json INTERFACE ${nlohmann_json_SOURCE_DIR})
+
+# ---- Executable ----
+
+add_executable(CPMJSONExample "main.cpp")
+set_target_properties(CPMJSONExample PROPERTIES CXX_STANDARD 17)        
+target_link_libraries(CPMJSONExample nlohmann_json)

examples/json/main.cpp

@@ -0,0 +1,25 @@
+#include <nlohmann/json.hpp>
+#include <iostream>
+#include <iomanip>
+
+int main(){
+  
+  nlohmann::json json = {
+    {"pi", 3.141},
+    {"happy", true},
+    {"name", "Niels"},
+    {"nothing", nullptr},
+    {"answer", {
+      {"everything", 42}
+    }},
+    {"list", {1, 0, 2}},
+    {"object", {
+      {"currency", "USD"},
+      {"value", 42.99}
+    }}
+  };
+
+  std::cout << "declared JSON object: " << std::setw(2) << json << std::endl;
+
+  return 0;
+}