1*349cc55cSDimitry Andric //===----------------------------------------------------------------------===// 2*349cc55cSDimitry Andric // 3*349cc55cSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*349cc55cSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5*349cc55cSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*349cc55cSDimitry Andric // 7*349cc55cSDimitry Andric //===----------------------------------------------------------------------===// 8*349cc55cSDimitry Andric 9*349cc55cSDimitry Andric #ifndef _LIBCPP___CONCEPTS_PREDICATE_H 10*349cc55cSDimitry Andric #define _LIBCPP___CONCEPTS_PREDICATE_H 11*349cc55cSDimitry Andric 12*349cc55cSDimitry Andric #include <__concepts/boolean_testable.h> 13*349cc55cSDimitry Andric #include <__concepts/invocable.h> 14*349cc55cSDimitry Andric #include <__config> 15*349cc55cSDimitry Andric #include <type_traits> 16*349cc55cSDimitry Andric 17*349cc55cSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 18*349cc55cSDimitry Andric #pragma GCC system_header 19*349cc55cSDimitry Andric #endif 20*349cc55cSDimitry Andric 21*349cc55cSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 22*349cc55cSDimitry Andric 23*349cc55cSDimitry Andric #if _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_CONCEPTS) 24*349cc55cSDimitry Andric 25*349cc55cSDimitry Andric // [concept.predicate] 26*349cc55cSDimitry Andric 27*349cc55cSDimitry Andric template<class _Fn, class... _Args> 28*349cc55cSDimitry Andric concept predicate = 29*349cc55cSDimitry Andric regular_invocable<_Fn, _Args...> && __boolean_testable<invoke_result_t<_Fn, _Args...>>; 30*349cc55cSDimitry Andric 31*349cc55cSDimitry Andric #endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_CONCEPTS) 32*349cc55cSDimitry Andric 33*349cc55cSDimitry Andric _LIBCPP_END_NAMESPACE_STD 34*349cc55cSDimitry Andric 35*349cc55cSDimitry Andric #endif // _LIBCPP___CONCEPTS_PREDICATE_H 36