| //===----------------------------------------------------------------------===// |
| // |
| // 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 |
| // |
| //===----------------------------------------------------------------------===// |
| |
| // UNSUPPORTED: c++03, c++11 |
| #include <functional> |
| #include <string> |
| |
| #include "test_macros.h" |
| |
| template <class T> |
| struct is_transparent |
| { |
| private: |
| struct two {char lx; char lxx;}; |
| template <class U> static two test(...); |
| template <class U> static char test(typename U::is_transparent* = 0); |
| public: |
| static const bool value = sizeof(test<T>(0)) == 1; |
| }; |
| |
| |
| int main(int, char**) |
| { |
| static_assert ( !is_transparent<std::less<int>>::value, "" ); |
| static_assert ( !is_transparent<std::less<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::less<void>>::value, "" ); |
| static_assert ( is_transparent<std::less<>>::value, "" ); |
| |
| static_assert ( !is_transparent<std::less_equal<int>>::value, "" ); |
| static_assert ( !is_transparent<std::less_equal<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::less_equal<void>>::value, "" ); |
| static_assert ( is_transparent<std::less_equal<>>::value, "" ); |
| |
| static_assert ( !is_transparent<std::equal_to<int>>::value, "" ); |
| static_assert ( !is_transparent<std::equal_to<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::equal_to<void>>::value, "" ); |
| static_assert ( is_transparent<std::equal_to<>>::value, "" ); |
| |
| static_assert ( !is_transparent<std::not_equal_to<int>>::value, "" ); |
| static_assert ( !is_transparent<std::not_equal_to<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::not_equal_to<void>>::value, "" ); |
| static_assert ( is_transparent<std::not_equal_to<>>::value, "" ); |
| |
| static_assert ( !is_transparent<std::greater<int>>::value, "" ); |
| static_assert ( !is_transparent<std::greater<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::greater<void>>::value, "" ); |
| static_assert ( is_transparent<std::greater<>>::value, "" ); |
| |
| static_assert ( !is_transparent<std::greater_equal<int>>::value, "" ); |
| static_assert ( !is_transparent<std::greater_equal<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::greater_equal<void>>::value, "" ); |
| static_assert ( is_transparent<std::greater_equal<>>::value, "" ); |
| |
| return 0; |
| } |