| 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, c++14 |
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| 10 | // type_traits |
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| 11 | |
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| 12 | // template<class B> struct negation; // C++17 |
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| 13 | // template<class B> |
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| 14 | // constexpr bool negation_v = negation<B>::value; // C++17 |
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| 15 | |
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| 16 | #include <type_traits> |
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| 17 | #include <cassert> |
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| 18 | |
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| 19 | #include "test_macros.h" |
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| 20 | |
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| 21 | struct True { static constexpr bool value = true; }; |
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| 22 | struct False { static constexpr bool value = false; }; |
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| 23 | |
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| 24 | int main(int, char**) |
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| 25 | { |
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| 26 | static_assert (!std::negation<std::true_type >::value, "" ); |
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| 27 | static_assert ( std::negation<std::false_type>::value, "" ); |
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| 28 | |
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| 29 | static_assert (!std::negation_v<std::true_type >, "" ); |
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| 30 | static_assert ( std::negation_v<std::false_type>, "" ); |
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| 31 | |
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| 32 | static_assert (!std::negation<True >::value, "" ); |
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| 33 | static_assert ( std::negation<False>::value, "" ); |
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| 34 | |
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| 35 | static_assert (!std::negation_v<True >, "" ); |
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| 36 | static_assert ( std::negation_v<False>, "" ); |
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| 37 | |
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| 38 | static_assert ( std::negation<std::negation<std::true_type >>::value, "" ); |
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| 39 | static_assert (!std::negation<std::negation<std::false_type>>::value, "" ); |
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| 40 | |
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| 41 | return 0; |
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| 42 | } |
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| 43 | |
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