1fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 2fe6060f1SDimitry Andric // 3fe6060f1SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4fe6060f1SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5fe6060f1SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6fe6060f1SDimitry Andric // 7fe6060f1SDimitry Andric //===----------------------------------------------------------------------===// 8fe6060f1SDimitry Andric 9fe6060f1SDimitry Andric #ifndef _LIBCPP___ALGORITHM_COMP_H 10fe6060f1SDimitry Andric #define _LIBCPP___ALGORITHM_COMP_H 11fe6060f1SDimitry Andric 12fe6060f1SDimitry Andric #include <__config> 13*06c3fb27SDimitry Andric #include <__type_traits/integral_constant.h> 14*06c3fb27SDimitry Andric #include <__type_traits/predicate_traits.h> 15fe6060f1SDimitry Andric 16fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17fe6060f1SDimitry Andric # pragma GCC system_header 18fe6060f1SDimitry Andric #endif 19fe6060f1SDimitry Andric 20fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 21fe6060f1SDimitry Andric 22bdd1243dSDimitry Andric struct __equal_to { 23bdd1243dSDimitry Andric template <class _T1, class _T2> 24bdd1243dSDimitry Andric _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool operator()(const _T1& __x, const _T2& __y) const { 25bdd1243dSDimitry Andric return __x == __y; 26bdd1243dSDimitry Andric } 27fe6060f1SDimitry Andric }; 28fe6060f1SDimitry Andric 29*06c3fb27SDimitry Andric template <class _Lhs, class _Rhs> 30*06c3fb27SDimitry Andric struct __is_trivial_equality_predicate<__equal_to, _Lhs, _Rhs> : true_type {}; 31fe6060f1SDimitry Andric 32*06c3fb27SDimitry Andric // The definition is required because __less is part of the ABI, but it's empty 33*06c3fb27SDimitry Andric // because all comparisons should be transparent. 34*06c3fb27SDimitry Andric template <class _T1 = void, class _T2 = _T1> 35*06c3fb27SDimitry Andric struct __less {}; 36fe6060f1SDimitry Andric 37*06c3fb27SDimitry Andric template <> 38*06c3fb27SDimitry Andric struct __less<void, void> { 39*06c3fb27SDimitry Andric template <class _Tp, class _Up> 40*06c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool operator()(const _Tp& __lhs, const _Up& __rhs) const { 41*06c3fb27SDimitry Andric return __lhs < __rhs; 42*06c3fb27SDimitry Andric } 43fe6060f1SDimitry Andric }; 44fe6060f1SDimitry Andric 45fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 46fe6060f1SDimitry Andric 47fe6060f1SDimitry Andric #endif // _LIBCPP___ALGORITHM_COMP_H 48