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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___CONCEPTS_PREDICATE_H10#define _LIBCPP___CONCEPTS_PREDICATE_H11 12#include <__concepts/boolean_testable.h>13#include <__concepts/invocable.h>14#include <__config>15#include <__type_traits/invoke.h>16 17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)18# pragma GCC system_header19#endif20 21_LIBCPP_BEGIN_NAMESPACE_STD22 23#if _LIBCPP_STD_VER >= 2024 25// [concept.predicate]26 27template <class _Fn, class... _Args>28concept predicate = regular_invocable<_Fn, _Args...> && __boolean_testable<invoke_result_t<_Fn, _Args...>>;29 30#endif // _LIBCPP_STD_VER >= 2031 32_LIBCPP_END_NAMESPACE_STD33 34#endif // _LIBCPP___CONCEPTS_PREDICATE_H35