42 lines
1.3 KiB
C++
42 lines
1.3 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// UNSUPPORTED: c++98, c++03, c++11
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// <experimental/type_traits>
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// template<class B> struct negation;
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// template<class B>
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// constexpr bool negation_v = negation<B>::value;
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#include <experimental/type_traits>
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#include <cassert>
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namespace ex = std::experimental;
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struct True { static constexpr bool value = true; };
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struct False { static constexpr bool value = false; };
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int main()
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{
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static_assert (!ex::negation<std::true_type >::value, "" );
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static_assert ( ex::negation<std::false_type>::value, "" );
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static_assert (!ex::negation_v<std::true_type >, "" );
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static_assert ( ex::negation_v<std::false_type>, "" );
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static_assert (!ex::negation<True >::value, "" );
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static_assert ( ex::negation<False>::value, "" );
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static_assert (!ex::negation_v<True >, "" );
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static_assert ( ex::negation_v<False>, "" );
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static_assert ( ex::negation<ex::negation<std::true_type >>::value, "" );
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static_assert (!ex::negation<ex::negation<std::false_type>>::value, "" );
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}
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