| 1 | //===----------------------------------------------------------------------===// |
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| 2 | // |
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| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
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| 4 | // See https://llvm.org/LICENSE.txt for license information. |
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| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
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| 6 | // |
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| 7 | //===----------------------------------------------------------------------===// |
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| 8 | |
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| 9 | // UNSUPPORTED: c++03, c++11 |
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| 10 | #include <functional> |
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| 11 | #include <string> |
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| 12 | |
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| 13 | #include "test_macros.h" |
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| 14 | |
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| 15 | template <class T> |
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| 16 | struct is_transparent |
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| 17 | { |
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| 18 | private: |
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| 19 | struct two {char lx; char lxx;}; |
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| 20 | template <class U> static two test(...); |
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| 21 | template <class U> static char test(typename U::is_transparent* = 0); |
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| 22 | public: |
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| 23 | static const bool value = sizeof(test<T>(0)) == 1; |
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| 24 | }; |
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| 25 | |
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| 26 | |
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| 27 | int main(int, char**) |
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| 28 | { |
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| 29 | static_assert ( !is_transparent<std::less<int>>::value, "" ); |
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| 30 | static_assert ( !is_transparent<std::less<std::string>>::value, "" ); |
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| 31 | static_assert ( is_transparent<std::less<void>>::value, "" ); |
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| 32 | static_assert ( is_transparent<std::less<>>::value, "" ); |
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| 33 | |
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| 34 | static_assert ( !is_transparent<std::less_equal<int>>::value, "" ); |
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| 35 | static_assert ( !is_transparent<std::less_equal<std::string>>::value, "" ); |
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| 36 | static_assert ( is_transparent<std::less_equal<void>>::value, "" ); |
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| 37 | static_assert ( is_transparent<std::less_equal<>>::value, "" ); |
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| 38 | |
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| 39 | static_assert ( !is_transparent<std::equal_to<int>>::value, "" ); |
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| 40 | static_assert ( !is_transparent<std::equal_to<std::string>>::value, "" ); |
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| 41 | static_assert ( is_transparent<std::equal_to<void>>::value, "" ); |
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| 42 | static_assert ( is_transparent<std::equal_to<>>::value, "" ); |
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| 43 | |
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| 44 | static_assert ( !is_transparent<std::not_equal_to<int>>::value, "" ); |
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| 45 | static_assert ( !is_transparent<std::not_equal_to<std::string>>::value, "" ); |
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| 46 | static_assert ( is_transparent<std::not_equal_to<void>>::value, "" ); |
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| 47 | static_assert ( is_transparent<std::not_equal_to<>>::value, "" ); |
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| 48 | |
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| 49 | static_assert ( !is_transparent<std::greater<int>>::value, "" ); |
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| 50 | static_assert ( !is_transparent<std::greater<std::string>>::value, "" ); |
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| 51 | static_assert ( is_transparent<std::greater<void>>::value, "" ); |
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| 52 | static_assert ( is_transparent<std::greater<>>::value, "" ); |
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| 53 | |
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| 54 | static_assert ( !is_transparent<std::greater_equal<int>>::value, "" ); |
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| 55 | static_assert ( !is_transparent<std::greater_equal<std::string>>::value, "" ); |
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| 56 | static_assert ( is_transparent<std::greater_equal<void>>::value, "" ); |
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| 57 | static_assert ( is_transparent<std::greater_equal<>>::value, "" ); |
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| 58 | |
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| 59 | return 0; |
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| 60 | } |
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| 61 | |
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