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_RELATION_H 10*4bdff4beSrobert #define _LIBCPP___CONCEPTS_RELATION_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__concepts/predicate.h> 13*4bdff4beSrobert #include <__config> 14*4bdff4beSrobert 15*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16*4bdff4beSrobert # pragma GCC system_header 17*4bdff4beSrobert #endif 18*4bdff4beSrobert 19*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 20*4bdff4beSrobert 21*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 22*4bdff4beSrobert 23*4bdff4beSrobert // [concept.relation] 24*4bdff4beSrobert 25*4bdff4beSrobert template<class _Rp, class _Tp, class _Up> 26*4bdff4beSrobert concept relation = 27*4bdff4beSrobert predicate<_Rp, _Tp, _Tp> && predicate<_Rp, _Up, _Up> && 28*4bdff4beSrobert predicate<_Rp, _Tp, _Up> && predicate<_Rp, _Up, _Tp>; 29*4bdff4beSrobert 30*4bdff4beSrobert // [concept.equiv] 31*4bdff4beSrobert 32*4bdff4beSrobert template<class _Rp, class _Tp, class _Up> 33*4bdff4beSrobert concept equivalence_relation = relation<_Rp, _Tp, _Up>; 34*4bdff4beSrobert 35*4bdff4beSrobert // [concept.strictweakorder] 36*4bdff4beSrobert 37*4bdff4beSrobert template<class _Rp, class _Tp, class _Up> 38*4bdff4beSrobert concept strict_weak_order = relation<_Rp, _Tp, _Up>; 39*4bdff4beSrobert 40*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 41*4bdff4beSrobert 42*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 43*4bdff4beSrobert 44*4bdff4beSrobert #endif // _LIBCPP___CONCEPTS_RELATION_H 45