Googletest export

Refactor the `Invoke` and `InvokeWithoutArgs` actions:
 - Replace pump'd classes and functions with templates.
 - Make the polymorphic actions be polymorphic functors instead.
 - Fix Invoke(Callback*) to work with subclasses of the callbacks, instead of trying to diagnose that in gmock_doctor.

PiperOrigin-RevId: 229604112

5 files changed, 52 insertions, 495 deletions

diff --git a/googlemock/include/gmock/gmock-actions.h b/googlemock/include/gmock/gmock-actions.h
index df49fbc..2f936a1 100644
--- a/googlemock/include/gmock/gmock-actions.h
+++ b/googlemock/include/gmock/gmock-actions.h
@@ -817,69 +817,47 @@ class SetArgumentPointeeAction<N, Proto, true> {
   GTEST_DISALLOW_ASSIGN_(SetArgumentPointeeAction);
 };
 
+// Implements the Invoke(object_ptr, &Class::Method) action.
+template <class Class, typename MethodPtr>
+struct InvokeMethodAction {
+  Class* const obj_ptr;
+  const MethodPtr method_ptr;
+
+  template <typename... Args>
+  auto operator()(Args&&... args) const
+      -> decltype((obj_ptr->*method_ptr)(std::forward<Args>(args)...)) {
+    return (obj_ptr->*method_ptr)(std::forward<Args>(args)...);
+  }
+};
+
 // Implements the InvokeWithoutArgs(f) action.  The template argument
 // FunctionImpl is the implementation type of f, which can be either a
 // function pointer or a functor.  InvokeWithoutArgs(f) can be used as an
-// Action<F> as long as f's type is compatible with F (i.e. f can be
-// assigned to a tr1::function<F>).
+// Action<F> as long as f's type is compatible with F.
 template <typename FunctionImpl>
-class InvokeWithoutArgsAction {
- public:
-  // The c'tor makes a copy of function_impl (either a function
-  // pointer or a functor).
-  explicit InvokeWithoutArgsAction(FunctionImpl function_impl)
-      : function_impl_(function_impl) {}
+struct InvokeWithoutArgsAction {
+  FunctionImpl function_impl;
 
   // Allows InvokeWithoutArgs(f) to be used as any action whose type is
   // compatible with f.
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple&) { return function_impl_(); }
-
- private:
-  FunctionImpl function_impl_;
-
-  GTEST_DISALLOW_ASSIGN_(InvokeWithoutArgsAction);
+  template <typename... Args>
+  auto operator()(const Args&...) -> decltype(function_impl()) {
+    return function_impl();
+  }
 };
 
 // Implements the InvokeWithoutArgs(object_ptr, &Class::Method) action.
 template <class Class, typename MethodPtr>
-class InvokeMethodWithoutArgsAction {
- public:
-  InvokeMethodWithoutArgsAction(Class* obj_ptr, MethodPtr method_ptr)
-      : obj_ptr_(obj_ptr), method_ptr_(method_ptr) {}
-
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple&) const {
-    return (obj_ptr_->*method_ptr_)();
-  }
-
- private:
-  Class* const obj_ptr_;
-  const MethodPtr method_ptr_;
+struct InvokeMethodWithoutArgsAction {
+  Class* const obj_ptr;
+  const MethodPtr method_ptr;
 
-  GTEST_DISALLOW_ASSIGN_(InvokeMethodWithoutArgsAction);
-};
+  using ReturnType = typename std::result_of<MethodPtr(Class*)>::type;
 
-// Implements the InvokeWithoutArgs(callback) action.
-template <typename CallbackType>
-class InvokeCallbackWithoutArgsAction {
- public:
-  // The c'tor takes ownership of the callback.
-  explicit InvokeCallbackWithoutArgsAction(CallbackType* callback)
-      : callback_(callback) {
-    callback->CheckIsRepeatable();  // Makes sure the callback is permanent.
+  template <typename... Args>
+  ReturnType operator()(const Args&...) const {
+    return (obj_ptr->*method_ptr)();
   }
-
-  // This type conversion operator template allows Invoke(callback) to
-  // be used wherever the callback's return type can be implicitly
-  // converted to that of the mock function.
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple&) const { return callback_->Run(); }
-
- private:
-  const std::shared_ptr<CallbackType> callback_;
-
-  GTEST_DISALLOW_ASSIGN_(InvokeCallbackWithoutArgsAction);
 };
 
 // Implements the IgnoreResult(action) action.
@@ -1157,24 +1135,38 @@ SetErrnoAndReturn(int errval, T result) {
 
 #endif  // !GTEST_OS_WINDOWS_MOBILE
 
-// Various overloads for InvokeWithoutArgs().
+// Various overloads for Invoke().
+
+// Legacy function.
+// Actions can now be implicitly constructed from callables. No need to create
+// wrapper objects.
+// This function exists for backwards compatibility.
+template <typename FunctionImpl>
+typename std::decay<FunctionImpl>::type Invoke(FunctionImpl&& function_impl) {
+  return std::forward<FunctionImpl>(function_impl);
+}
+
+// Creates an action that invokes the given method on the given object
+// with the mock function's arguments.
+template <class Class, typename MethodPtr>
+internal::InvokeMethodAction<Class, MethodPtr> Invoke(Class* obj_ptr,
+                                                      MethodPtr method_ptr) {
+  return {obj_ptr, method_ptr};
+}
 
 // Creates an action that invokes 'function_impl' with no argument.
 template <typename FunctionImpl>
-PolymorphicAction<internal::InvokeWithoutArgsAction<FunctionImpl> >
+internal::InvokeWithoutArgsAction<typename std::decay<FunctionImpl>::type>
 InvokeWithoutArgs(FunctionImpl function_impl) {
-  return MakePolymorphicAction(
-      internal::InvokeWithoutArgsAction<FunctionImpl>(function_impl));
+  return {std::move(function_impl)};
 }
 
 // Creates an action that invokes the given method on the given object
 // with no argument.
 template <class Class, typename MethodPtr>
-PolymorphicAction<internal::InvokeMethodWithoutArgsAction<Class, MethodPtr> >
-InvokeWithoutArgs(Class* obj_ptr, MethodPtr method_ptr) {
-  return MakePolymorphicAction(
-      internal::InvokeMethodWithoutArgsAction<Class, MethodPtr>(
-          obj_ptr, method_ptr));
+internal::InvokeMethodWithoutArgsAction<Class, MethodPtr> InvokeWithoutArgs(
+    Class* obj_ptr, MethodPtr method_ptr) {
+  return {obj_ptr, method_ptr};
 }
 
 // Creates an action that performs an_action and throws away its
diff --git a/googlemock/include/gmock/gmock-generated-actions.h b/googlemock/include/gmock/gmock-generated-actions.h
index 910436e..3264bca 100644
--- a/googlemock/include/gmock/gmock-generated-actions.h
+++ b/googlemock/include/gmock/gmock-generated-actions.h
@@ -50,308 +50,6 @@
 namespace testing {
 namespace internal {
 
-// InvokeHelper<F> knows how to unpack an N-tuple and invoke an N-ary
-// function, method, or callback with the unpacked values, where F is
-// a function type that takes N arguments.
-template <typename Result, typename ArgumentTuple>
-class InvokeHelper;
-
-template <typename R>
-class InvokeHelper<R, ::std::tuple<> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<>&) {
-           return function();
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<>&) {
-           return (obj_ptr->*method_ptr)();
-  }
-
-  template <typename CallbackType>
-  static R InvokeCallback(CallbackType* callback,
-                          const ::std::tuple<>&) {
-           return callback->Run();
-  }
-};
-
-template <typename R, typename A1>
-class InvokeHelper<R, ::std::tuple<A1> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<A1>& args) {
-           return function(std::get<0>(args));
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<A1>& args) {
-           return (obj_ptr->*method_ptr)(std::get<0>(args));
-  }
-
-  template <typename CallbackType>
-  static R InvokeCallback(CallbackType* callback,
-                          const ::std::tuple<A1>& args) {
-           return callback->Run(std::get<0>(args));
-  }
-};
-
-template <typename R, typename A1, typename A2>
-class InvokeHelper<R, ::std::tuple<A1, A2> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<A1, A2>& args) {
-           return function(std::get<0>(args), std::get<1>(args));
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<A1, A2>& args) {
-           return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args));
-  }
-
-  template <typename CallbackType>
-  static R InvokeCallback(CallbackType* callback,
-                          const ::std::tuple<A1, A2>& args) {
-           return callback->Run(std::get<0>(args), std::get<1>(args));
-  }
-};
-
-template <typename R, typename A1, typename A2, typename A3>
-class InvokeHelper<R, ::std::tuple<A1, A2, A3> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<A1, A2, A3>& args) {
-           return function(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args));
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<A1, A2, A3>& args) {
-           return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args));
-  }
-
-  template <typename CallbackType>
-  static R InvokeCallback(CallbackType* callback,
-                          const ::std::tuple<A1, A2, A3>& args) {
-           return callback->Run(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args));
-  }
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4>
-class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4>& args) {
-           return function(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args));
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<A1, A2, A3, A4>& args) {
-           return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args));
-  }
-
-  template <typename CallbackType>
-  static R InvokeCallback(CallbackType* callback,
-                          const ::std::tuple<A1, A2, A3, A4>& args) {
-           return callback->Run(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args));
-  }
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5>
-class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4,
-      A5>& args) {
-           return function(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args));
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<A1, A2, A3, A4, A5>& args) {
-           return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args));
-  }
-
-  template <typename CallbackType>
-  static R InvokeCallback(CallbackType* callback,
-                          const ::std::tuple<A1, A2, A3, A4, A5>& args) {
-           return callback->Run(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args));
-  }
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6>
-class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5, A6> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4, A5,
-      A6>& args) {
-           return function(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args),
-               std::get<5>(args));
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<A1, A2, A3, A4, A5, A6>& args) {
-           return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args),
-               std::get<5>(args));
-  }
-
-  // There is no InvokeCallback() for 6-tuples
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6, typename A7>
-class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5, A6, A7> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4, A5, A6,
-      A7>& args) {
-           return function(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args),
-               std::get<5>(args), std::get<6>(args));
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<A1, A2, A3, A4, A5, A6, A7>& args) {
-           return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args),
-               std::get<5>(args), std::get<6>(args));
-  }
-
-  // There is no InvokeCallback() for 7-tuples
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6, typename A7, typename A8>
-class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4, A5, A6,
-      A7, A8>& args) {
-           return function(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args),
-               std::get<5>(args), std::get<6>(args), std::get<7>(args));
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<A1, A2, A3, A4, A5, A6, A7,
-                            A8>& args) {
-           return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args),
-               std::get<5>(args), std::get<6>(args), std::get<7>(args));
-  }
-
-  // There is no InvokeCallback() for 8-tuples
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6, typename A7, typename A8, typename A9>
-class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8, A9> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4, A5, A6,
-      A7, A8, A9>& args) {
-           return function(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args),
-               std::get<5>(args), std::get<6>(args), std::get<7>(args),
-               std::get<8>(args));
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8,
-                            A9>& args) {
-           return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args),
-               std::get<5>(args), std::get<6>(args), std::get<7>(args),
-               std::get<8>(args));
-  }
-
-  // There is no InvokeCallback() for 9-tuples
-};
-
-template <typename R, typename A1, typename A2, typename A3, typename A4,
-    typename A5, typename A6, typename A7, typename A8, typename A9,
-    typename A10>
-class InvokeHelper<R, ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8, A9, A10> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<A1, A2, A3, A4, A5, A6,
-      A7, A8, A9, A10>& args) {
-           return function(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args),
-               std::get<5>(args), std::get<6>(args), std::get<7>(args),
-               std::get<8>(args), std::get<9>(args));
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<A1, A2, A3, A4, A5, A6, A7, A8, A9,
-                            A10>& args) {
-           return (obj_ptr->*method_ptr)(std::get<0>(args), std::get<1>(args),
-               std::get<2>(args), std::get<3>(args), std::get<4>(args),
-               std::get<5>(args), std::get<6>(args), std::get<7>(args),
-               std::get<8>(args), std::get<9>(args));
-  }
-
-  // There is no InvokeCallback() for 10-tuples
-};
-
-// Implements the Invoke(callback) action.
-template <typename CallbackType>
-class InvokeCallbackAction {
- public:
-  // The c'tor takes ownership of the callback.
-  explicit InvokeCallbackAction(CallbackType* callback)
-      : callback_(callback) {
-    callback->CheckIsRepeatable();  // Makes sure the callback is permanent.
-  }
-
-  // This type conversion operator template allows Invoke(callback) to
-  // be used wherever the callback's type is compatible with that of
-  // the mock function, i.e. if the mock function's arguments can be
-  // implicitly converted to the callback's arguments and the
-  // callback's result can be implicitly converted to the mock
-  // function's result.
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple& args) const {
-    return InvokeHelper<Result, ArgumentTuple>::InvokeCallback(
-        callback_.get(), args);
-  }
- private:
-  const std::shared_ptr<CallbackType> callback_;
-};
-
 // A macro from the ACTION* family (defined later in this file)
 // defines an action that can be used in a mock function.  Typically,
 // these actions only care about a subset of the arguments of the mock
diff --git a/googlemock/include/gmock/gmock-generated-actions.h.pump b/googlemock/include/gmock/gmock-generated-actions.h.pump
index 27c96ef..1e9549f 100644
--- a/googlemock/include/gmock/gmock-generated-actions.h.pump
+++ b/googlemock/include/gmock/gmock-generated-actions.h.pump
@@ -52,76 +52,6 @@ $$}} This meta comment fixes auto-indentation in editors.
 namespace testing {
 namespace internal {
 
-// InvokeHelper<F> knows how to unpack an N-tuple and invoke an N-ary
-// function, method, or callback with the unpacked values, where F is
-// a function type that takes N arguments.
-template <typename Result, typename ArgumentTuple>
-class InvokeHelper;
-
-
-$var max_callback_arity = 5
-$range i 0..n
-$for i [[
-$range j 1..i
-$var types = [[$for j [[, typename A$j]]]]
-$var as = [[$for j, [[A$j]]]]
-$var args = [[$if i==0 [[]] $else [[ args]]]]
-$var gets = [[$for j, [[std::get<$(j - 1)>(args)]]]]
-template <typename R$types>
-class InvokeHelper<R, ::std::tuple<$as> > {
- public:
-  template <typename Function>
-  static R Invoke(Function function, const ::std::tuple<$as>&$args) {
-           return function($gets);
-  }
-
-  template <class Class, typename MethodPtr>
-  static R InvokeMethod(Class* obj_ptr,
-                        MethodPtr method_ptr,
-                        const ::std::tuple<$as>&$args) {
-           return (obj_ptr->*method_ptr)($gets);
-  }
-
-
-$if i <= max_callback_arity [[
-  template <typename CallbackType>
-  static R InvokeCallback(CallbackType* callback,
-                          const ::std::tuple<$as>&$args) {
-           return callback->Run($gets);
-  }
-]] $else [[
-  // There is no InvokeCallback() for $i-tuples
-]]
-
-};
-
-
-]]
-// Implements the Invoke(callback) action.
-template <typename CallbackType>
-class InvokeCallbackAction {
- public:
-  // The c'tor takes ownership of the callback.
-  explicit InvokeCallbackAction(CallbackType* callback)
-      : callback_(callback) {
-    callback->CheckIsRepeatable();  // Makes sure the callback is permanent.
-  }
-
-  // This type conversion operator template allows Invoke(callback) to
-  // be used wherever the callback's type is compatible with that of
-  // the mock function, i.e. if the mock function's arguments can be
-  // implicitly converted to the callback's arguments and the
-  // callback's result can be implicitly converted to the mock
-  // function's result.
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple& args) const {
-    return InvokeHelper<Result, ArgumentTuple>::InvokeCallback(
-        callback_.get(), args);
-  }
- private:
-  const std::shared_ptr<CallbackType> callback_;
-};
-
 // A macro from the ACTION* family (defined later in this file)
 // defines an action that can be used in a mock function.  Typically,
 // these actions only care about a subset of the arguments of the mock
diff --git a/googlemock/include/gmock/gmock-more-actions.h b/googlemock/include/gmock/gmock-more-actions.h
index 1098408..a052495 100644
--- a/googlemock/include/gmock/gmock-more-actions.h
+++ b/googlemock/include/gmock/gmock-more-actions.h
@@ -38,59 +38,13 @@
 #define GMOCK_INCLUDE_GMOCK_GMOCK_MORE_ACTIONS_H_
 
 #include <algorithm>
+#include <type_traits>
 
 #include "gmock/gmock-generated-actions.h"
 
 namespace testing {
 namespace internal {
 
-// Implements the Invoke(f) action.  The template argument
-// FunctionImpl is the implementation type of f, which can be either a
-// function pointer or a functor.  Invoke(f) can be used as an
-// Action<F> as long as f's type is compatible with F (i.e. f can be
-// assigned to a tr1::function<F>).
-template <typename FunctionImpl>
-class InvokeAction {
- public:
-  // The c'tor makes a copy of function_impl (either a function
-  // pointer or a functor).
-  explicit InvokeAction(FunctionImpl function_impl)
-      : function_impl_(function_impl) {}
-
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple& args) {
-    return InvokeHelper<Result, ArgumentTuple>::Invoke(function_impl_, args);
-  }
-
- private:
-  FunctionImpl function_impl_;
-
-  GTEST_DISALLOW_ASSIGN_(InvokeAction);
-};
-
-// Implements the Invoke(object_ptr, &Class::Method) action.
-template <class Class, typename MethodPtr>
-class InvokeMethodAction {
- public:
-  InvokeMethodAction(Class* obj_ptr, MethodPtr method_ptr)
-      : method_ptr_(method_ptr), obj_ptr_(obj_ptr) {}
-
-  template <typename Result, typename ArgumentTuple>
-  Result Perform(const ArgumentTuple& args) const {
-    return InvokeHelper<Result, ArgumentTuple>::InvokeMethod(
-        obj_ptr_, method_ptr_, args);
-  }
-
- private:
-  // The order of these members matters.  Reversing the order can trigger
-  // warning C4121 in MSVC (see
-  // http://computer-programming-forum.com/7-vc.net/6fbc30265f860ad1.htm ).
-  const MethodPtr method_ptr_;
-  Class* const obj_ptr_;
-
-  GTEST_DISALLOW_ASSIGN_(InvokeMethodAction);
-};
-
 // An internal replacement for std::copy which mimics its behavior. This is
 // necessary because Visual Studio deprecates ::std::copy, issuing warning 4996.
 // However Visual Studio 2010 and later do not honor #pragmas which disable that
@@ -109,24 +63,6 @@ inline OutputIterator CopyElements(InputIterator first,
 
 // Various overloads for Invoke().
 
-// Creates an action that invokes 'function_impl' with the mock
-// function's arguments.
-template <typename FunctionImpl>
-PolymorphicAction<internal::InvokeAction<FunctionImpl> > Invoke(
-    FunctionImpl function_impl) {
-  return MakePolymorphicAction(
-      internal::InvokeAction<FunctionImpl>(function_impl));
-}
-
-// Creates an action that invokes the given method on the given object
-// with the mock function's arguments.
-template <class Class, typename MethodPtr>
-PolymorphicAction<internal::InvokeMethodAction<Class, MethodPtr> > Invoke(
-    Class* obj_ptr, MethodPtr method_ptr) {
-  return MakePolymorphicAction(
-      internal::InvokeMethodAction<Class, MethodPtr>(obj_ptr, method_ptr));
-}
-
 // The ACTION*() macros trigger warning C4100 (unreferenced formal
 // parameter) in MSVC with -W4.  Unfortunately they cannot be fixed in
 // the macro definition, as the warnings are generated when the macro
diff --git a/googlemock/include/gmock/internal/gmock-internal-utils.h b/googlemock/include/gmock/internal/gmock-internal-utils.h
index 661c835..093b465 100644
--- a/googlemock/include/gmock/internal/gmock-internal-utils.h
+++ b/googlemock/include/gmock/internal/gmock-internal-utils.h
@@ -42,6 +42,7 @@
 #include <stdio.h>
 #include <ostream>  // NOLINT
 #include <string>
+#include <type_traits>
 #include "gmock/internal/gmock-port.h"
 #include "gtest/gtest.h"