1*4bdff4beSrobert //===----------------------------------------------------------------------===// 2*4bdff4beSrobert // 3*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 5*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*4bdff4beSrobert // 7*4bdff4beSrobert //===----------------------------------------------------------------------===// 8*4bdff4beSrobert 9*4bdff4beSrobert #ifndef _LIBCPP___CONCEPTS_PREDICATE_H 10*4bdff4beSrobert #define _LIBCPP___CONCEPTS_PREDICATE_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__concepts/boolean_testable.h> 13*4bdff4beSrobert #include <__concepts/invocable.h> 14*4bdff4beSrobert #include <__config> 15*4bdff4beSrobert #include <__functional/invoke.h> 16*4bdff4beSrobert 17*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18*4bdff4beSrobert # pragma GCC system_header 19*4bdff4beSrobert #endif 20*4bdff4beSrobert 21*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 22*4bdff4beSrobert 23*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 24*4bdff4beSrobert 25*4bdff4beSrobert // [concept.predicate] 26*4bdff4beSrobert 27*4bdff4beSrobert template<class _Fn, class... _Args> 28*4bdff4beSrobert concept predicate = 29*4bdff4beSrobert regular_invocable<_Fn, _Args...> && __boolean_testable<invoke_result_t<_Fn, _Args...>>; 30*4bdff4beSrobert 31*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 32*4bdff4beSrobert 33*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 34*4bdff4beSrobert 35*4bdff4beSrobert #endif // _LIBCPP___CONCEPTS_PREDICATE_H 36