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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
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP___CONCEPTS_BOOLEAN_TESTABLE_H
#define _LIBCPP___CONCEPTS_BOOLEAN_TESTABLE_H
#include <__concepts/convertible_to.h>
#include <__config>
#include <__utility/forward.h>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
_LIBCPP_BEGIN_NAMESPACE_STD
#if _LIBCPP_STD_VER > 17
// [concepts.booleantestable]
template<class _Tp>
concept __boolean_testable_impl = convertible_to<_Tp, bool>;
template<class _Tp>
concept __boolean_testable = __boolean_testable_impl<_Tp> && requires(_Tp&& __t) {
{ !_VSTD::forward<_Tp>(__t) } -> __boolean_testable_impl;
};
#endif // _LIBCPP_STD_VER > 17
_LIBCPP_END_NAMESPACE_STD
#endif // _LIBCPP___CONCEPTS_BOOLEAN_TESTABLE_H
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