1349cc55cSDimitry Andric //===----------------------------------------------------------------------===// 2349cc55cSDimitry Andric // 3349cc55cSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4349cc55cSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5349cc55cSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6349cc55cSDimitry Andric // 7349cc55cSDimitry Andric //===----------------------------------------------------------------------===// 8349cc55cSDimitry Andric 9349cc55cSDimitry Andric #ifndef _LIBCPP___CONCEPTS_RELATION_H 10349cc55cSDimitry Andric #define _LIBCPP___CONCEPTS_RELATION_H 11349cc55cSDimitry Andric 12349cc55cSDimitry Andric #include <__concepts/predicate.h> 13349cc55cSDimitry Andric #include <__config> 14349cc55cSDimitry Andric 15349cc55cSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16349cc55cSDimitry Andric # pragma GCC system_header 17349cc55cSDimitry Andric #endif 18349cc55cSDimitry Andric 19349cc55cSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 20349cc55cSDimitry Andric 21*06c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 22349cc55cSDimitry Andric 23349cc55cSDimitry Andric // [concept.relation] 24349cc55cSDimitry Andric 25349cc55cSDimitry Andric template <class _Rp, class _Tp, class _Up> 26349cc55cSDimitry Andric concept relation = 27*06c3fb27SDimitry Andric predicate<_Rp, _Tp, _Tp> && predicate<_Rp, _Up, _Up> && predicate<_Rp, _Tp, _Up> && predicate<_Rp, _Up, _Tp>; 28349cc55cSDimitry Andric 29349cc55cSDimitry Andric // [concept.equiv] 30349cc55cSDimitry Andric 31349cc55cSDimitry Andric template <class _Rp, class _Tp, class _Up> 32349cc55cSDimitry Andric concept equivalence_relation = relation<_Rp, _Tp, _Up>; 33349cc55cSDimitry Andric 34349cc55cSDimitry Andric // [concept.strictweakorder] 35349cc55cSDimitry Andric 36349cc55cSDimitry Andric template <class _Rp, class _Tp, class _Up> 37349cc55cSDimitry Andric concept strict_weak_order = relation<_Rp, _Tp, _Up>; 38349cc55cSDimitry Andric 39*06c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 40349cc55cSDimitry Andric 41349cc55cSDimitry Andric _LIBCPP_END_NAMESPACE_STD 42349cc55cSDimitry Andric 43349cc55cSDimitry Andric #endif // _LIBCPP___CONCEPTS_RELATION_H 44