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1//===----------------------------------------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___CXX03___ALGORITHM_COMP_H10#define _LIBCPP___CXX03___ALGORITHM_COMP_H11 12#include <__cxx03/__config>13#include <__cxx03/__type_traits/desugars_to.h>14 15#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)16# pragma GCC system_header17#endif18 19_LIBCPP_BEGIN_NAMESPACE_STD20 21struct __equal_to {22 template <class _T1, class _T2>23 _LIBCPP_HIDE_FROM_ABI bool operator()(const _T1& __x, const _T2& __y) const {24 return __x == __y;25 }26};27 28template <class _Tp, class _Up>29inline const bool __desugars_to_v<__equal_tag, __equal_to, _Tp, _Up> = true;30 31// The definition is required because __less is part of the ABI, but it's empty32// because all comparisons should be transparent.33template <class _T1 = void, class _T2 = _T1>34struct __less {};35 36template <>37struct __less<void, void> {38 template <class _Tp, class _Up>39 _LIBCPP_HIDE_FROM_ABI bool operator()(const _Tp& __lhs, const _Up& __rhs) const {40 return __lhs < __rhs;41 }42};43 44template <class _Tp>45inline const bool __desugars_to_v<__less_tag, __less<>, _Tp, _Tp> = true;46 47_LIBCPP_END_NAMESPACE_STD48 49#endif // _LIBCPP___CXX03___ALGORITHM_COMP_H50