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Really fix use of std::result_of when invoke_result is available

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Closes #1934
This commit is contained in:
Martin Hořeňovský
2020-05-21 21:39:19 +02:00
parent ddc9f4c61d
commit 77dc8cfc45
5 changed files with 15 additions and 15 deletions
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12
include/internal/catch_meta.hpp
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@@ -32,13 +32,13 @@ namespace Catch {
#if defined(__cpp_lib_is_invocable) && __cpp_lib_is_invocable >= 201703
// std::result_of is deprecated in C++17 and removed in C++20. Hence, it is
// replaced with std::invoke_result here. Also *_t format is preferred over
// typename *::type format.
template <typename Func, typename U>
using FunctionReturnType = std::remove_reference_t<std::remove_cv_t<std::invoke_result_t<Func, U>>>;
// replaced with std::invoke_result here.
template <typename Func, typename... U>
using FunctionReturnType = std::remove_reference_t<std::remove_cv_t<std::invoke_result_t<Func, U...>>>;
#else
template <typename Func, typename U>
using FunctionReturnType = typename std::remove_reference<typename std::remove_cv<typename std::result_of<Func(U)>::type>::type>::type;
// Keep ::type here because we still support C++11
template <typename Func, typename... U>
using FunctionReturnType = typename std::remove_reference<typename std::remove_cv<typename std::result_of<Func(U...)>::type>::type>::type;
#endif
} // namespace Catch