Without this patch when using CMAKE_CXX_STANDARD=20
and MSVC 19.30.30705.0 compilation of unit tests
fails with
llvm\utils\unittest\googlemock\include\gmock/gmock-actions.h(828): error C2039: 'result_of': is not a member of 'std'
Patch is taken from Google Test:
https://github.com/google/googletest/commit/
61f010d703b32de9bfb20ab90ece38ab2f25977f
Do not use std::result_of as it was removed in C++20.
Differential Revision: https://reviews.llvm.org/D115163
Class* const obj_ptr;
const MethodPtr method_ptr;
- using ReturnType = typename std::result_of<MethodPtr(Class*)>::type;
+ using ReturnType =
+ decltype((std::declval<Class*>()->*std::declval<MethodPtr>())());
template <typename... Args>
ReturnType operator()(const Args&...) const {