| //===----------------------------------------------------------------------===// |
| // |
| // 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::plus<int>>::value, "" ); |
| static_assert ( !is_transparent<std::plus<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::plus<void>>::value, "" ); |
| static_assert ( is_transparent<std::plus<>>::value, "" ); |
| |
| static_assert ( !is_transparent<std::minus<int>>::value, "" ); |
| static_assert ( !is_transparent<std::minus<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::minus<void>>::value, "" ); |
| static_assert ( is_transparent<std::minus<>>::value, "" ); |
| |
| static_assert ( !is_transparent<std::multiplies<int>>::value, "" ); |
| static_assert ( !is_transparent<std::multiplies<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::multiplies<void>>::value, "" ); |
| static_assert ( is_transparent<std::multiplies<>>::value, "" ); |
| |
| static_assert ( !is_transparent<std::divides<int>>::value, "" ); |
| static_assert ( !is_transparent<std::divides<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::divides<void>>::value, "" ); |
| static_assert ( is_transparent<std::divides<>>::value, "" ); |
| |
| static_assert ( !is_transparent<std::modulus<int>>::value, "" ); |
| static_assert ( !is_transparent<std::modulus<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::modulus<void>>::value, "" ); |
| static_assert ( is_transparent<std::modulus<>>::value, "" ); |
| |
| static_assert ( !is_transparent<std::negate<int>>::value, "" ); |
| static_assert ( !is_transparent<std::negate<std::string>>::value, "" ); |
| static_assert ( is_transparent<std::negate<void>>::value, "" ); |
| static_assert ( is_transparent<std::negate<>>::value, "" ); |
| |
| return 0; |
| } |