diff --git a/googlemock/CMakeLists.txt b/googlemock/CMakeLists.txt
index 3e72d75c..b0c1db83 100644
--- a/googlemock/CMakeLists.txt
+++ b/googlemock/CMakeLists.txt
@@ -156,7 +156,6 @@ $env:Path = \"$project_bin;$env:Path\"
   cxx_test(gmock-function-mocker_test gmock_main)
   cxx_test(gmock-generated-actions_test gmock_main)
   cxx_test(gmock-generated-function-mockers_test gmock_main)
-  cxx_test(gmock-generated-internal-utils_test gmock_main)
   cxx_test(gmock-generated-matchers_test gmock_main)
   cxx_test(gmock-internal-utils_test gmock_main)
   cxx_test(gmock-matchers_test gmock_main)
diff --git a/googlemock/Makefile.am b/googlemock/Makefile.am
index 7fe68099..c2ee96db 100644
--- a/googlemock/Makefile.am
+++ b/googlemock/Makefile.am
@@ -41,7 +41,6 @@ pkginclude_HEADERS = \
 
 pkginclude_internaldir = $(pkgincludedir)/internal
 pkginclude_internal_HEADERS = \
-  include/gmock/internal/gmock-generated-internal-utils.h \
   include/gmock/internal/gmock-internal-utils.h \
   include/gmock/internal/gmock-port.h \
   include/gmock/internal/gmock-pp.h \
@@ -111,7 +110,6 @@ EXTRA_DIST += \
   test/gmock-generated-actions_test.cc \
   test/gmock-function-mocker_test.cc \
   test/gmock-generated-function-mockers_test.cc \
-  test/gmock-generated-internal-utils_test.cc \
   test/gmock-generated-matchers_test.cc \
   test/gmock-internal-utils_test.cc \
   test/gmock-matchers_test.cc \
@@ -141,7 +139,6 @@ EXTRA_DIST += \
   include/gmock/gmock-generated-actions.h.pump \
   include/gmock/gmock-generated-function-mockers.h.pump \
   include/gmock/gmock-generated-matchers.h.pump \
-  include/gmock/internal/gmock-generated-internal-utils.h.pump \
   include/gmock/internal/custom/gmock-generated-actions.h.pump
 
 # Script for fusing Google Mock and Google Test source files.
diff --git a/googlemock/include/gmock/gmock-generated-function-mockers.h b/googlemock/include/gmock/gmock-generated-function-mockers.h
index 5229cc1e..cd957817 100644
--- a/googlemock/include/gmock/gmock-generated-function-mockers.h
+++ b/googlemock/include/gmock/gmock-generated-function-mockers.h
@@ -121,7 +121,7 @@ using internal::FunctionMocker;
 // The type of argument N of the given function type.
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_ARG_(tn, N, ...) \
-    tn ::testing::internal::Function<__VA_ARGS__>::Argument##N
+    tn ::testing::internal::Function<__VA_ARGS__>::template Arg<N-1>::type
 
 // The matcher type for argument N of the given function type.
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
@@ -135,12 +135,11 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD0_(tn, constness, ct, Method, ...) \
+  static_assert(0 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       ) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 0), \
-        this_method_does_not_take_0_arguments); \
     GMOCK_MOCKER_(0, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(0, constness, Method).Invoke(); \
   } \
@@ -160,12 +159,11 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD1_(tn, constness, ct, Method, ...) \
+  static_assert(1 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       GMOCK_ARG_(tn, 1, __VA_ARGS__) gmock_a1) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 1), \
-        this_method_does_not_take_1_argument); \
     GMOCK_MOCKER_(1, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(1, constness, \
         Method).Invoke(::std::forward<GMOCK_ARG_(tn, 1, \
@@ -187,13 +185,12 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD2_(tn, constness, ct, Method, ...) \
+  static_assert(2 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       GMOCK_ARG_(tn, 1, __VA_ARGS__) gmock_a1, GMOCK_ARG_(tn, 2, \
           __VA_ARGS__) gmock_a2) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 2), \
-        this_method_does_not_take_2_arguments); \
     GMOCK_MOCKER_(2, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(2, constness, \
         Method).Invoke(::std::forward<GMOCK_ARG_(tn, 1, \
@@ -218,14 +215,13 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD3_(tn, constness, ct, Method, ...) \
+  static_assert(3 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       GMOCK_ARG_(tn, 1, __VA_ARGS__) gmock_a1, GMOCK_ARG_(tn, 2, \
           __VA_ARGS__) gmock_a2, GMOCK_ARG_(tn, 3, \
           __VA_ARGS__) gmock_a3) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 3), \
-        this_method_does_not_take_3_arguments); \
     GMOCK_MOCKER_(3, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(3, constness, \
         Method).Invoke(::std::forward<GMOCK_ARG_(tn, 1, \
@@ -254,14 +250,13 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD4_(tn, constness, ct, Method, ...) \
+  static_assert(4 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       GMOCK_ARG_(tn, 1, __VA_ARGS__) gmock_a1, GMOCK_ARG_(tn, 2, \
           __VA_ARGS__) gmock_a2, GMOCK_ARG_(tn, 3, __VA_ARGS__) gmock_a3, \
           GMOCK_ARG_(tn, 4, __VA_ARGS__) gmock_a4) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 4), \
-        this_method_does_not_take_4_arguments); \
     GMOCK_MOCKER_(4, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(4, constness, \
         Method).Invoke(::std::forward<GMOCK_ARG_(tn, 1, \
@@ -293,15 +288,14 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD5_(tn, constness, ct, Method, ...) \
+  static_assert(5 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       GMOCK_ARG_(tn, 1, __VA_ARGS__) gmock_a1, GMOCK_ARG_(tn, 2, \
           __VA_ARGS__) gmock_a2, GMOCK_ARG_(tn, 3, __VA_ARGS__) gmock_a3, \
           GMOCK_ARG_(tn, 4, __VA_ARGS__) gmock_a4, GMOCK_ARG_(tn, 5, \
           __VA_ARGS__) gmock_a5) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 5), \
-        this_method_does_not_take_5_arguments); \
     GMOCK_MOCKER_(5, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(5, constness, \
         Method).Invoke(::std::forward<GMOCK_ARG_(tn, 1, \
@@ -336,16 +330,15 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD6_(tn, constness, ct, Method, ...) \
+  static_assert(6 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       GMOCK_ARG_(tn, 1, __VA_ARGS__) gmock_a1, GMOCK_ARG_(tn, 2, \
           __VA_ARGS__) gmock_a2, GMOCK_ARG_(tn, 3, __VA_ARGS__) gmock_a3, \
           GMOCK_ARG_(tn, 4, __VA_ARGS__) gmock_a4, GMOCK_ARG_(tn, 5, \
           __VA_ARGS__) gmock_a5, GMOCK_ARG_(tn, 6, \
           __VA_ARGS__) gmock_a6) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 6), \
-        this_method_does_not_take_6_arguments); \
     GMOCK_MOCKER_(6, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(6, constness, \
         Method).Invoke(::std::forward<GMOCK_ARG_(tn, 1, \
@@ -383,16 +376,15 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD7_(tn, constness, ct, Method, ...) \
+  static_assert(7 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       GMOCK_ARG_(tn, 1, __VA_ARGS__) gmock_a1, GMOCK_ARG_(tn, 2, \
           __VA_ARGS__) gmock_a2, GMOCK_ARG_(tn, 3, __VA_ARGS__) gmock_a3, \
           GMOCK_ARG_(tn, 4, __VA_ARGS__) gmock_a4, GMOCK_ARG_(tn, 5, \
           __VA_ARGS__) gmock_a5, GMOCK_ARG_(tn, 6, __VA_ARGS__) gmock_a6, \
           GMOCK_ARG_(tn, 7, __VA_ARGS__) gmock_a7) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 7), \
-        this_method_does_not_take_7_arguments); \
     GMOCK_MOCKER_(7, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(7, constness, \
         Method).Invoke(::std::forward<GMOCK_ARG_(tn, 1, \
@@ -433,6 +425,9 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD8_(tn, constness, ct, Method, ...) \
+  static_assert(8 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       GMOCK_ARG_(tn, 1, __VA_ARGS__) gmock_a1, GMOCK_ARG_(tn, 2, \
           __VA_ARGS__) gmock_a2, GMOCK_ARG_(tn, 3, __VA_ARGS__) gmock_a3, \
@@ -440,10 +435,6 @@ using internal::FunctionMocker;
           __VA_ARGS__) gmock_a5, GMOCK_ARG_(tn, 6, __VA_ARGS__) gmock_a6, \
           GMOCK_ARG_(tn, 7, __VA_ARGS__) gmock_a7, GMOCK_ARG_(tn, 8, \
           __VA_ARGS__) gmock_a8) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 8), \
-        this_method_does_not_take_8_arguments); \
     GMOCK_MOCKER_(8, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(8, constness, \
         Method).Invoke(::std::forward<GMOCK_ARG_(tn, 1, \
@@ -487,6 +478,9 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD9_(tn, constness, ct, Method, ...) \
+  static_assert(9 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       GMOCK_ARG_(tn, 1, __VA_ARGS__) gmock_a1, GMOCK_ARG_(tn, 2, \
           __VA_ARGS__) gmock_a2, GMOCK_ARG_(tn, 3, __VA_ARGS__) gmock_a3, \
@@ -495,10 +489,6 @@ using internal::FunctionMocker;
           GMOCK_ARG_(tn, 7, __VA_ARGS__) gmock_a7, GMOCK_ARG_(tn, 8, \
           __VA_ARGS__) gmock_a8, GMOCK_ARG_(tn, 9, \
           __VA_ARGS__) gmock_a9) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 9), \
-        this_method_does_not_take_9_arguments); \
     GMOCK_MOCKER_(9, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(9, constness, \
         Method).Invoke(::std::forward<GMOCK_ARG_(tn, 1, \
@@ -546,6 +536,9 @@ using internal::FunctionMocker;
 
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD10_(tn, constness, ct, Method, ...) \
+  static_assert(10 == \
+      ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, \
+      "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       GMOCK_ARG_(tn, 1, __VA_ARGS__) gmock_a1, GMOCK_ARG_(tn, 2, \
           __VA_ARGS__) gmock_a2, GMOCK_ARG_(tn, 3, __VA_ARGS__) gmock_a3, \
@@ -554,10 +547,6 @@ using internal::FunctionMocker;
           GMOCK_ARG_(tn, 7, __VA_ARGS__) gmock_a7, GMOCK_ARG_(tn, 8, \
           __VA_ARGS__) gmock_a8, GMOCK_ARG_(tn, 9, __VA_ARGS__) gmock_a9, \
           GMOCK_ARG_(tn, 10, __VA_ARGS__) gmock_a10) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value \
-            == 10), \
-        this_method_does_not_take_10_arguments); \
     GMOCK_MOCKER_(10, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_(10, constness, \
         Method).Invoke(::std::forward<GMOCK_ARG_(tn, 1, \
diff --git a/googlemock/include/gmock/gmock-generated-function-mockers.h.pump b/googlemock/include/gmock/gmock-generated-function-mockers.h.pump
index a5ec7387..a56e132f 100644
--- a/googlemock/include/gmock/gmock-generated-function-mockers.h.pump
+++ b/googlemock/include/gmock/gmock-generated-function-mockers.h.pump
@@ -124,7 +124,7 @@ using internal::FunctionMocker;
 // The type of argument N of the given function type.
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_ARG_(tn, N, ...) \
-    tn ::testing::internal::Function<__VA_ARGS__>::Argument##N
+    tn ::testing::internal::Function<__VA_ARGS__>::template Arg<N-1>::type
 
 // The matcher type for argument N of the given function type.
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
@@ -149,11 +149,9 @@ $var anything_matchers = [[$for j, \
                      [[::testing::A<GMOCK_ARG_(tn, $j, __VA_ARGS__)>()]]]]
 // INTERNAL IMPLEMENTATION - DON'T USE IN USER CODE!!!
 #define GMOCK_METHOD$i[[]]_(tn, constness, ct, Method, ...) \
+  static_assert($i == ::testing::internal::Function<__VA_ARGS__>::ArgumentCount, "MOCK_METHOD<N> must match argument count.");\
   GMOCK_RESULT_(tn, __VA_ARGS__) ct Method( \
       $arg_as) constness { \
-    GTEST_COMPILE_ASSERT_((::std::tuple_size<                          \
-        tn ::testing::internal::Function<__VA_ARGS__>::ArgumentTuple>::value == $i), \
-        this_method_does_not_take_$i[[]]_argument[[$if i != 1 [[s]]]]); \
     GMOCK_MOCKER_($i, constness, Method).SetOwnerAndName(this, #Method); \
     return GMOCK_MOCKER_($i, constness, Method).Invoke($as); \
   } \
diff --git a/googlemock/include/gmock/internal/gmock-generated-internal-utils.h b/googlemock/include/gmock/internal/gmock-generated-internal-utils.h
deleted file mode 100644
index eb85e266..00000000
--- a/googlemock/include/gmock/internal/gmock-generated-internal-utils.h
+++ /dev/null
@@ -1,266 +0,0 @@
-// This file was GENERATED by command:
-//     pump.py gmock-generated-internal-utils.h.pump
-// DO NOT EDIT BY HAND!!!
-
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * 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.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// 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.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file contains template meta-programming utility classes needed
-// for implementing Google Mock.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_GENERATED_INTERNAL_UTILS_H_
-#define GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_GENERATED_INTERNAL_UTILS_H_
-
-#include "gmock/internal/gmock-port.h"
-#include "gtest/gtest.h"
-
-namespace testing {
-
-template <typename T>
-class Matcher;
-
-namespace internal {
-
-// MatcherTuple<T>::type is a tuple type where each field is a Matcher
-// for the corresponding field in tuple type T.
-template <typename Tuple>
-struct MatcherTuple;
-
-template <>
-struct MatcherTuple< ::std::tuple<> > {
-  typedef ::std::tuple< > type;
-};
-
-template <typename A1>
-struct MatcherTuple< ::std::tuple<A1> > {
-  typedef ::std::tuple<Matcher<A1> > type;
-};
-
-template <typename A1, typename A2>
-struct MatcherTuple< ::std::tuple<A1, A2> > {
-  typedef ::std::tuple<Matcher<A1>, Matcher<A2> > type;
-};
-
-template <typename A1, typename A2, typename A3>
-struct MatcherTuple< ::std::tuple<A1, A2, A3> > {
-  typedef ::std::tuple<Matcher<A1>, Matcher<A2>, Matcher<A3> > type;
-};
-
-template <typename A1, typename A2, typename A3, typename A4>
-struct MatcherTuple< ::std::tuple<A1, A2, A3, A4> > {
-  typedef ::std::tuple<Matcher<A1>, Matcher<A2>, Matcher<A3>,
-      Matcher<A4> > type;
-};
-
-template <typename A1, typename A2, typename A3, typename A4, typename A5>
-struct MatcherTuple< ::std::tuple<A1, A2, A3, A4, A5> > {
-  typedef ::std::tuple<Matcher<A1>, Matcher<A2>, Matcher<A3>, Matcher<A4>,
-      Matcher<A5> > type;
-};
-
-template <typename A1, typename A2, typename A3, typename A4, typename A5,
-    typename A6>
-struct MatcherTuple< ::std::tuple<A1, A2, A3, A4, A5, A6> > {
-  typedef ::std::tuple<Matcher<A1>, Matcher<A2>, Matcher<A3>, Matcher<A4>,
-      Matcher<A5>, Matcher<A6> > type;
-};
-
-template <typename A1, typename A2, typename A3, typename A4, typename A5,
-    typename A6, typename A7>
-struct MatcherTuple< ::std::tuple<A1, A2, A3, A4, A5, A6, A7> > {
-  typedef ::std::tuple<Matcher<A1>, Matcher<A2>, Matcher<A3>, Matcher<A4>,
-      Matcher<A5>, Matcher<A6>, Matcher<A7> > type;
-};
-
-template <typename A1, typename A2, typename A3, typename A4, typename A5,
-    typename A6, typename A7, typename A8>
-struct MatcherTuple< ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8> > {
-  typedef ::std::tuple<Matcher<A1>, Matcher<A2>, Matcher<A3>, Matcher<A4>,
-      Matcher<A5>, Matcher<A6>, Matcher<A7>, Matcher<A8> > type;
-};
-
-template <typename A1, typename A2, typename A3, typename A4, typename A5,
-    typename A6, typename A7, typename A8, typename A9>
-struct MatcherTuple< ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8, A9> > {
-  typedef ::std::tuple<Matcher<A1>, Matcher<A2>, Matcher<A3>, Matcher<A4>,
-      Matcher<A5>, Matcher<A6>, Matcher<A7>, Matcher<A8>, Matcher<A9> > type;
-};
-
-template <typename A1, typename A2, typename A3, typename A4, typename A5,
-    typename A6, typename A7, typename A8, typename A9, typename A10>
-struct MatcherTuple< ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8, A9, A10> > {
-  typedef ::std::tuple<Matcher<A1>, Matcher<A2>, Matcher<A3>, Matcher<A4>,
-      Matcher<A5>, Matcher<A6>, Matcher<A7>, Matcher<A8>, Matcher<A9>,
-      Matcher<A10> > type;
-};
-
-// Template struct Function<F>, where F must be a function type, contains
-// the following typedefs:
-//
-//   Result:               the function's return type.
-//   ArgumentN:            the type of the N-th argument, where N starts with 1.
-//   ArgumentTuple:        the tuple type consisting of all parameters of F.
-//   ArgumentMatcherTuple: the tuple type consisting of Matchers for all
-//                         parameters of F.
-//   MakeResultVoid:       the function type obtained by substituting void
-//                         for the return type of F.
-//   MakeResultIgnoredValue:
-//                         the function type obtained by substituting Something
-//                         for the return type of F.
-template <typename F>
-struct Function;
-
-template <typename R>
-struct Function<R()> {
-  typedef R Result;
-  typedef ::std::tuple<> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid();
-  typedef IgnoredValue MakeResultIgnoredValue();
-};
-
-template <typename R, typename A1>
-struct Function<R(A1)>
-    : Function<R()> {
-  typedef A1 Argument1;
-  typedef ::std::tuple<A1> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid(A1);
-  typedef IgnoredValue MakeResultIgnoredValue(A1);
-};
-
-template <typename R, typename A1, typename A2>
-struct Function<R(A1, A2)>
-    : Function<R(A1)> {
-  typedef A2 Argument2;
-  typedef ::std::tuple<A1, A2> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid(A1, A2);
-  typedef IgnoredValue MakeResultIgnoredValue(A1, A2);
-};
-
-template <typename R, typename A1, typename A2, typename A3>
-struct Function<R(A1, A2, A3)>
-    : Function<R(A1, A2)> {
-  typedef A3 Argument3;
-  typedef ::std::tuple<A1, A2, A3> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid(A1, A2, A3);
-  typedef IgnoredValue MakeResultIgnoredValue(A1, A2, A3);
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4>
-struct Function<R(A1, A2, A3, A4)>
-    : Function<R(A1, A2, A3)> {
-  typedef A4 Argument4;
-  typedef ::std::tuple<A1, A2, A3, A4> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid(A1, A2, A3, A4);
-  typedef IgnoredValue MakeResultIgnoredValue(A1, A2, A3, A4);
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5>
-struct Function<R(A1, A2, A3, A4, A5)>
-    : Function<R(A1, A2, A3, A4)> {
-  typedef A5 Argument5;
-  typedef ::std::tuple<A1, A2, A3, A4, A5> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid(A1, A2, A3, A4, A5);
-  typedef IgnoredValue MakeResultIgnoredValue(A1, A2, A3, A4, A5);
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6>
-struct Function<R(A1, A2, A3, A4, A5, A6)>
-    : Function<R(A1, A2, A3, A4, A5)> {
-  typedef A6 Argument6;
-  typedef ::std::tuple<A1, A2, A3, A4, A5, A6> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid(A1, A2, A3, A4, A5, A6);
-  typedef IgnoredValue MakeResultIgnoredValue(A1, A2, A3, A4, A5, A6);
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6, typename A7>
-struct Function<R(A1, A2, A3, A4, A5, A6, A7)>
-    : Function<R(A1, A2, A3, A4, A5, A6)> {
-  typedef A7 Argument7;
-  typedef ::std::tuple<A1, A2, A3, A4, A5, A6, A7> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid(A1, A2, A3, A4, A5, A6, A7);
-  typedef IgnoredValue MakeResultIgnoredValue(A1, A2, A3, A4, A5, A6, A7);
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6, typename A7, typename A8>
-struct Function<R(A1, A2, A3, A4, A5, A6, A7, A8)>
-    : Function<R(A1, A2, A3, A4, A5, A6, A7)> {
-  typedef A8 Argument8;
-  typedef ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid(A1, A2, A3, A4, A5, A6, A7, A8);
-  typedef IgnoredValue MakeResultIgnoredValue(A1, A2, A3, A4, A5, A6, A7, A8);
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6, typename A7, typename A8, typename A9>
-struct Function<R(A1, A2, A3, A4, A5, A6, A7, A8, A9)>
-    : Function<R(A1, A2, A3, A4, A5, A6, A7, A8)> {
-  typedef A9 Argument9;
-  typedef ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8, A9> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid(A1, A2, A3, A4, A5, A6, A7, A8, A9);
-  typedef IgnoredValue MakeResultIgnoredValue(A1, A2, A3, A4, A5, A6, A7, A8,
-      A9);
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6, typename A7, typename A8, typename A9,
-    typename A10>
-struct Function<R(A1, A2, A3, A4, A5, A6, A7, A8, A9, A10)>
-    : Function<R(A1, A2, A3, A4, A5, A6, A7, A8, A9)> {
-  typedef A10 Argument10;
-  typedef ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8, A9, A10> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid(A1, A2, A3, A4, A5, A6, A7, A8, A9, A10);
-  typedef IgnoredValue MakeResultIgnoredValue(A1, A2, A3, A4, A5, A6, A7, A8,
-      A9, A10);
-};
-
-}  // namespace internal
-
-}  // namespace testing
-
-#endif  // GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_GENERATED_INTERNAL_UTILS_H_
diff --git a/googlemock/include/gmock/internal/gmock-generated-internal-utils.h.pump b/googlemock/include/gmock/internal/gmock-generated-internal-utils.h.pump
deleted file mode 100644
index 6787905b..00000000
--- a/googlemock/include/gmock/internal/gmock-generated-internal-utils.h.pump
+++ /dev/null
@@ -1,125 +0,0 @@
-$$ -*- mode: c++; -*-
-$$ This is a Pump source file.  Please use Pump to convert it to
-$$ gmock-generated-function-mockers.h.
-$$
-$var n = 10  $$ The maximum arity we support.
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * 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.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// 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.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file contains template meta-programming utility classes needed
-// for implementing Google Mock.
-
-// GOOGLETEST_CM0002 DO NOT DELETE
-
-#ifndef GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_GENERATED_INTERNAL_UTILS_H_
-#define GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_GENERATED_INTERNAL_UTILS_H_
-
-#include "gmock/internal/gmock-port.h"
-#include "gtest/gtest.h"
-
-namespace testing {
-
-template <typename T>
-class Matcher;
-
-namespace internal {
-
-// MatcherTuple<T>::type is a tuple type where each field is a Matcher
-// for the corresponding field in tuple type T.
-template <typename Tuple>
-struct MatcherTuple;
-
-
-$range i 0..n
-$for i [[
-$range j 1..i
-$var typename_As = [[$for j, [[typename A$j]]]]
-$var As = [[$for j, [[A$j]]]]
-$var matcher_As = [[$for j, [[Matcher<A$j>]]]]
-template <$typename_As>
-struct MatcherTuple< ::std::tuple<$As> > {
-  typedef ::std::tuple<$matcher_As > type;
-};
-
-
-]]
-// Template struct Function<F>, where F must be a function type, contains
-// the following typedefs:
-//
-//   Result:               the function's return type.
-//   ArgumentN:            the type of the N-th argument, where N starts with 1.
-//   ArgumentTuple:        the tuple type consisting of all parameters of F.
-//   ArgumentMatcherTuple: the tuple type consisting of Matchers for all
-//                         parameters of F.
-//   MakeResultVoid:       the function type obtained by substituting void
-//                         for the return type of F.
-//   MakeResultIgnoredValue:
-//                         the function type obtained by substituting Something
-//                         for the return type of F.
-template <typename F>
-struct Function;
-
-template <typename R>
-struct Function<R()> {
-  typedef R Result;
-  typedef ::std::tuple<> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid();
-  typedef IgnoredValue MakeResultIgnoredValue();
-};
-
-
-$range i 1..n
-$for i [[
-$range j 1..i
-$var typename_As = [[$for j [[, typename A$j]]]]
-$var As = [[$for j, [[A$j]]]]
-$var matcher_As = [[$for j, [[Matcher<A$j>]]]]
-$range k 1..i-1
-$var prev_As = [[$for k, [[A$k]]]]
-template <typename R$typename_As>
-struct Function<R($As)>
-    : Function<R($prev_As)> {
-  typedef A$i Argument$i;
-  typedef ::std::tuple<$As> ArgumentTuple;
-  typedef typename MatcherTuple<ArgumentTuple>::type ArgumentMatcherTuple;
-  typedef void MakeResultVoid($As);
-  typedef IgnoredValue MakeResultIgnoredValue($As);
-};
-
-
-]]
-}  // namespace internal
-
-}  // namespace testing
-
-#endif  // GMOCK_INCLUDE_GMOCK_INTERNAL_GMOCK_GENERATED_INTERNAL_UTILS_H_
diff --git a/googlemock/include/gmock/internal/gmock-internal-utils.h b/googlemock/include/gmock/internal/gmock-internal-utils.h
index 7ebd645e..661c8357 100644
--- a/googlemock/include/gmock/internal/gmock-internal-utils.h
+++ b/googlemock/include/gmock/internal/gmock-internal-utils.h
@@ -42,11 +42,14 @@
 #include <stdio.h>
 #include <ostream>  // NOLINT
 #include <string>
-#include "gmock/internal/gmock-generated-internal-utils.h"
 #include "gmock/internal/gmock-port.h"
 #include "gtest/gtest.h"
 
 namespace testing {
+
+template <typename>
+class Matcher;
+
 namespace internal {
 
 // Silence MSVC C4100 (unreferenced formal parameter) and
@@ -525,6 +528,37 @@ auto Apply(F&& f, Tuple&& args)
                    make_int_pack<std::tuple_size<Tuple>::value>());
 }
 
+// Template struct Function<F>, where F must be a function type, contains
+// the following typedefs:
+//
+//   Result:               the function's return type.
+//   Arg<N>:               the type of the N-th argument, where N starts with 0.
+//   ArgumentTuple:        the tuple type consisting of all parameters of F.
+//   ArgumentMatcherTuple: the tuple type consisting of Matchers for all
+//                         parameters of F.
+//   MakeResultVoid:       the function type obtained by substituting void
+//                         for the return type of F.
+//   MakeResultIgnoredValue:
+//                         the function type obtained by substituting Something
+//                         for the return type of F.
+template <typename T>
+struct Function;
+
+template <typename R, typename... Args>
+struct Function<R(Args...)> {
+  using Result = R;
+  static constexpr size_t ArgumentCount = sizeof...(Args);
+  template <size_t I>
+  using Arg = ElemFromList<I, typename MakeIndexSequence<sizeof...(Args)>::type,
+                           Args...>;
+  using ArgumentTuple = std::tuple<Args...>;
+  using ArgumentMatcherTuple = std::tuple<Matcher<Args>...>;
+  using MakeResultVoid = void(Args...);
+  using MakeResultIgnoredValue = IgnoredValue(Args...);
+};
+
+template <typename R, typename... Args>
+constexpr size_t Function<R(Args...)>::ArgumentCount;
 
 #ifdef _MSC_VER
 # pragma warning(pop)
diff --git a/googlemock/test/gmock-generated-internal-utils_test.cc b/googlemock/test/gmock-generated-internal-utils_test.cc
deleted file mode 100644
index 965cbaa6..00000000
--- a/googlemock/test/gmock-generated-internal-utils_test.cc
+++ /dev/null
@@ -1,130 +0,0 @@
-// Copyright 2007, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * 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.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// 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.
-
-
-// Google Mock - a framework for writing C++ mock classes.
-//
-// This file tests the internal utilities.
-
-#include "gmock/internal/gmock-generated-internal-utils.h"
-#include "gmock/internal/gmock-internal-utils.h"
-#include "gtest/gtest.h"
-
-namespace {
-
-using ::testing::Matcher;
-using ::testing::internal::CompileAssertTypesEqual;
-using ::testing::internal::MatcherTuple;
-using ::testing::internal::Function;
-using ::testing::internal::IgnoredValue;
-
-// Tests the MatcherTuple template struct.
-
-TEST(MatcherTupleTest, ForSize0) {
-  CompileAssertTypesEqual<std::tuple<>, MatcherTuple<std::tuple<> >::type>();
-}
-
-TEST(MatcherTupleTest, ForSize1) {
-  CompileAssertTypesEqual<std::tuple<Matcher<int> >,
-                          MatcherTuple<std::tuple<int> >::type>();
-}
-
-TEST(MatcherTupleTest, ForSize2) {
-  CompileAssertTypesEqual<std::tuple<Matcher<int>, Matcher<char> >,
-                          MatcherTuple<std::tuple<int, char> >::type>();
-}
-
-TEST(MatcherTupleTest, ForSize5) {
-  CompileAssertTypesEqual<
-      std::tuple<Matcher<int>, Matcher<char>, Matcher<bool>, Matcher<double>,
-                 Matcher<char*> >,
-      MatcherTuple<std::tuple<int, char, bool, double, char*> >::type>();
-}
-
-// Tests the Function template struct.
-
-TEST(FunctionTest, Nullary) {
-  typedef Function<int()> F;  // NOLINT
-  CompileAssertTypesEqual<int, F::Result>();
-  CompileAssertTypesEqual<std::tuple<>, F::ArgumentTuple>();
-  CompileAssertTypesEqual<std::tuple<>, F::ArgumentMatcherTuple>();
-  CompileAssertTypesEqual<void(), F::MakeResultVoid>();
-  CompileAssertTypesEqual<IgnoredValue(), F::MakeResultIgnoredValue>();
-}
-
-TEST(FunctionTest, Unary) {
-  typedef Function<int(bool)> F;  // NOLINT
-  CompileAssertTypesEqual<int, F::Result>();
-  CompileAssertTypesEqual<bool, F::Argument1>();
-  CompileAssertTypesEqual<std::tuple<bool>, F::ArgumentTuple>();
-  CompileAssertTypesEqual<std::tuple<Matcher<bool> >,
-                          F::ArgumentMatcherTuple>();
-  CompileAssertTypesEqual<void(bool), F::MakeResultVoid>();  // NOLINT
-  CompileAssertTypesEqual<IgnoredValue(bool),  // NOLINT
-      F::MakeResultIgnoredValue>();
-}
-
-TEST(FunctionTest, Binary) {
-  typedef Function<int(bool, const long&)> F;  // NOLINT
-  CompileAssertTypesEqual<int, F::Result>();
-  CompileAssertTypesEqual<bool, F::Argument1>();
-  CompileAssertTypesEqual<const long&, F::Argument2>();  // NOLINT
-  CompileAssertTypesEqual<std::tuple<bool, const long&>,  // NOLINT
-                          F::ArgumentTuple>();
-  CompileAssertTypesEqual<
-      std::tuple<Matcher<bool>, Matcher<const long&> >,  // NOLINT
-      F::ArgumentMatcherTuple>();
-  CompileAssertTypesEqual<void(bool, const long&), F::MakeResultVoid>();  // NOLINT
-  CompileAssertTypesEqual<IgnoredValue(bool, const long&),  // NOLINT
-      F::MakeResultIgnoredValue>();
-}
-
-TEST(FunctionTest, LongArgumentList) {
-  typedef Function<char(bool, int, char*, int&, const long&)> F;  // NOLINT
-  CompileAssertTypesEqual<char, F::Result>();
-  CompileAssertTypesEqual<bool, F::Argument1>();
-  CompileAssertTypesEqual<int, F::Argument2>();
-  CompileAssertTypesEqual<char*, F::Argument3>();
-  CompileAssertTypesEqual<int&, F::Argument4>();
-  CompileAssertTypesEqual<const long&, F::Argument5>();  // NOLINT
-  CompileAssertTypesEqual<
-      std::tuple<bool, int, char*, int&, const long&>,  // NOLINT
-      F::ArgumentTuple>();
-  CompileAssertTypesEqual<
-      std::tuple<Matcher<bool>, Matcher<int>, Matcher<char*>, Matcher<int&>,
-                 Matcher<const long&> >,  // NOLINT
-      F::ArgumentMatcherTuple>();
-  CompileAssertTypesEqual<void(bool, int, char*, int&, const long&),  // NOLINT
-                          F::MakeResultVoid>();
-  CompileAssertTypesEqual<
-      IgnoredValue(bool, int, char*, int&, const long&),  // NOLINT
-      F::MakeResultIgnoredValue>();
-}
-
-}  // Unnamed namespace
diff --git a/googlemock/test/gmock-internal-utils_test.cc b/googlemock/test/gmock-internal-utils_test.cc
index b322f2d1..0adcdfb9 100644
--- a/googlemock/test/gmock-internal-utils_test.cc
+++ b/googlemock/test/gmock-internal-utils_test.cc
@@ -690,6 +690,70 @@ TEST(StlContainerViewTest, WorksForDynamicNativeArray) {
   EXPECT_EQ(0, a3.begin()[0]);
 }
 
+// Tests the Function template struct.
+
+TEST(FunctionTest, Nullary) {
+  typedef Function<int()> F;  // NOLINT
+  EXPECT_EQ(0u, F::ArgumentCount);
+  CompileAssertTypesEqual<int, F::Result>();
+  CompileAssertTypesEqual<std::tuple<>, F::ArgumentTuple>();
+  CompileAssertTypesEqual<std::tuple<>, F::ArgumentMatcherTuple>();
+  CompileAssertTypesEqual<void(), F::MakeResultVoid>();
+  CompileAssertTypesEqual<IgnoredValue(), F::MakeResultIgnoredValue>();
+}
+
+TEST(FunctionTest, Unary) {
+  typedef Function<int(bool)> F;  // NOLINT
+  EXPECT_EQ(1u, F::ArgumentCount);
+  CompileAssertTypesEqual<int, F::Result>();
+  CompileAssertTypesEqual<bool, F::Arg<0>::type>();
+  CompileAssertTypesEqual<std::tuple<bool>, F::ArgumentTuple>();
+  CompileAssertTypesEqual<std::tuple<Matcher<bool> >,
+                          F::ArgumentMatcherTuple>();
+  CompileAssertTypesEqual<void(bool), F::MakeResultVoid>();  // NOLINT
+  CompileAssertTypesEqual<IgnoredValue(bool),  // NOLINT
+      F::MakeResultIgnoredValue>();
+}
+
+TEST(FunctionTest, Binary) {
+  typedef Function<int(bool, const long&)> F;  // NOLINT
+  EXPECT_EQ(2u, F::ArgumentCount);
+  CompileAssertTypesEqual<int, F::Result>();
+  CompileAssertTypesEqual<bool, F::Arg<0>::type>();
+  CompileAssertTypesEqual<const long&, F::Arg<1>::type>();  // NOLINT
+  CompileAssertTypesEqual<std::tuple<bool, const long&>,  // NOLINT
+                          F::ArgumentTuple>();
+  CompileAssertTypesEqual<
+      std::tuple<Matcher<bool>, Matcher<const long&> >,  // NOLINT
+      F::ArgumentMatcherTuple>();
+  CompileAssertTypesEqual<void(bool, const long&), F::MakeResultVoid>();  // NOLINT
+  CompileAssertTypesEqual<IgnoredValue(bool, const long&),  // NOLINT
+      F::MakeResultIgnoredValue>();
+}
+
+TEST(FunctionTest, LongArgumentList) {
+  typedef Function<char(bool, int, char*, int&, const long&)> F;  // NOLINT
+  EXPECT_EQ(5u, F::ArgumentCount);
+  CompileAssertTypesEqual<char, F::Result>();
+  CompileAssertTypesEqual<bool, F::Arg<0>::type>();
+  CompileAssertTypesEqual<int, F::Arg<1>::type>();
+  CompileAssertTypesEqual<char*, F::Arg<2>::type>();
+  CompileAssertTypesEqual<int&, F::Arg<3>::type>();
+  CompileAssertTypesEqual<const long&, F::Arg<4>::type>();  // NOLINT
+  CompileAssertTypesEqual<
+      std::tuple<bool, int, char*, int&, const long&>,  // NOLINT
+      F::ArgumentTuple>();
+  CompileAssertTypesEqual<
+      std::tuple<Matcher<bool>, Matcher<int>, Matcher<char*>, Matcher<int&>,
+                 Matcher<const long&> >,  // NOLINT
+      F::ArgumentMatcherTuple>();
+  CompileAssertTypesEqual<void(bool, int, char*, int&, const long&),  // NOLINT
+                          F::MakeResultVoid>();
+  CompileAssertTypesEqual<
+      IgnoredValue(bool, int, char*, int&, const long&),  // NOLINT
+      F::MakeResultIgnoredValue>();
+}
+
 }  // namespace
 }  // namespace internal
 }  // namespace testing
diff --git a/googlemock/test/gmock_all_test.cc b/googlemock/test/gmock_all_test.cc
index e1774fbb..b2b2027d 100644
--- a/googlemock/test/gmock_all_test.cc
+++ b/googlemock/test/gmock_all_test.cc
@@ -39,7 +39,6 @@
 #include "test/gmock-cardinalities_test.cc"
 #include "test/gmock-generated-actions_test.cc"
 #include "test/gmock-generated-function-mockers_test.cc"
-#include "test/gmock-generated-internal-utils_test.cc"
 #include "test/gmock-generated-matchers_test.cc"
 #include "test/gmock-internal-utils_test.cc"
 #include "test/gmock-matchers_test.cc"