test/std/utilities/meta/meta.help/bool_constant.pass.cpp

//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//

// type_traits

// bool_constant

#include <type_traits>
#include <cassert>

#include "test_macros.h"

int main(int, char**)
{
#if TEST_STD_VER > 14
    typedef std::bool_constant<true> _t;
    static_assert(_t::value, "");
    static_assert((std::is_same<_t::value_type, bool>::value), "");
    static_assert((std::is_same<_t::type, _t>::value), "");
    static_assert((_t() == true), "");

    typedef std::bool_constant<false> _f;
    static_assert(!_f::value, "");
    static_assert((std::is_same<_f::value_type, bool>::value), "");
    static_assert((std::is_same<_f::type, _f>::value), "");
    static_assert((_f() == false), "");
#endif

  return 0;
}