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*0fca6ea1SDimitry Andric #include <__type_traits/desugars_to.h> 14fe6060f1SDimitry Andric 15fe6060f1SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 16fe6060f1SDimitry Andric # pragma GCC system_header 17fe6060f1SDimitry Andric #endif 18fe6060f1SDimitry Andric 19fe6060f1SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 20fe6060f1SDimitry Andric 21bdd1243dSDimitry Andric struct __equal_to { 22bdd1243dSDimitry Andric template <class _T1, class _T2> 23bdd1243dSDimitry Andric _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool operator()(const _T1& __x, const _T2& __y) const { 24bdd1243dSDimitry Andric return __x == __y; 25bdd1243dSDimitry Andric } 26fe6060f1SDimitry Andric }; 27fe6060f1SDimitry Andric 285f757f3fSDimitry Andric template <class _Tp, class _Up> 29*0fca6ea1SDimitry Andric inline const bool __desugars_to_v<__equal_tag, __equal_to, _Tp, _Up> = true; 30fe6060f1SDimitry Andric 3106c3fb27SDimitry Andric // The definition is required because __less is part of the ABI, but it's empty 3206c3fb27SDimitry Andric // because all comparisons should be transparent. 3306c3fb27SDimitry Andric template <class _T1 = void, class _T2 = _T1> 3406c3fb27SDimitry Andric struct __less {}; 35fe6060f1SDimitry Andric 3606c3fb27SDimitry Andric template <> 3706c3fb27SDimitry Andric struct __less<void, void> { 3806c3fb27SDimitry Andric template <class _Tp, class _Up> 3906c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool operator()(const _Tp& __lhs, const _Up& __rhs) const { 4006c3fb27SDimitry Andric return __lhs < __rhs; 4106c3fb27SDimitry Andric } 42fe6060f1SDimitry Andric }; 43fe6060f1SDimitry Andric 44*0fca6ea1SDimitry Andric template <class _Tp> 45*0fca6ea1SDimitry Andric inline const bool __desugars_to_v<__less_tag, __less<>, _Tp, _Tp> = true; 46*0fca6ea1SDimitry Andric 47fe6060f1SDimitry Andric _LIBCPP_END_NAMESPACE_STD 48fe6060f1SDimitry Andric 49fe6060f1SDimitry Andric #endif // _LIBCPP___ALGORITHM_COMP_H 50