| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // <functional> |
| // |
| // template <class T> |
| // struct unwrap_reference; |
| // |
| // template <class T> |
| // using unwrap_reference_t = typename unwrap_reference<T>::type; |
| |
| // UNSUPPORTED: c++03, c++11, c++14, c++17 |
| |
| #include <functional> |
| #include <type_traits> |
| |
| #include "test_macros.h" |
| |
| |
| template <typename T, typename Expected> |
| void check_equal() { |
| static_assert(std::is_same_v<typename std::unwrap_reference<T>::type, Expected>); |
| static_assert(std::is_same_v<typename std::unwrap_reference<T>::type, std::unwrap_reference_t<T>>); |
| } |
| |
| template <typename T> |
| void check() { |
| check_equal<T, T>(); |
| check_equal<T&, T&>(); |
| check_equal<T const, T const>(); |
| check_equal<T const&, T const&>(); |
| |
| check_equal<std::reference_wrapper<T>, T&>(); |
| check_equal<std::reference_wrapper<T const>, T const&>(); |
| } |
| |
| struct T { }; |
| |
| int main(int, char**) { |
| check<T>(); |
| check<int>(); |
| check<float>(); |
| |
| check<T*>(); |
| check<int*>(); |
| check<float*>(); |
| |
| return 0; |
| } |