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//===----------------------------------------------------------------------===//
//
// 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++98, c++03, c++11, c++14
// type_traits
// template<class B> struct negation; // C++17
// template<class B>
// constexpr bool negation_v = negation<B>::value; // C++17
#include <type_traits>
#include <cassert>
struct True { static constexpr bool value = true; };
struct False { static constexpr bool value = false; };
int main()
{
static_assert (!std::negation<std::true_type >::value, "" );
static_assert ( std::negation<std::false_type>::value, "" );
static_assert (!std::negation_v<std::true_type >, "" );
static_assert ( std::negation_v<std::false_type>, "" );
static_assert (!std::negation<True >::value, "" );
static_assert ( std::negation<False>::value, "" );
static_assert (!std::negation_v<True >, "" );
static_assert ( std::negation_v<False>, "" );
static_assert ( std::negation<std::negation<std::true_type >>::value, "" );
static_assert (!std::negation<std::negation<std::false_type>>::value, "" );
}
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