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-exception 6// 7//===----------------------------------------------------------------------===// 8 9#ifndef _LIBCPP___ALGORITHM_COMP_H 10#define _LIBCPP___ALGORITHM_COMP_H 11 12#include <__config> 13#include <__type_traits/integral_constant.h> 14#include <__type_traits/operation_traits.h> 15 16#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 17# pragma GCC system_header 18#endif 19 20_LIBCPP_BEGIN_NAMESPACE_STD 21 22struct __equal_to { 23 template <class _T1, class _T2> 24 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool operator()(const _T1& __x, const _T2& __y) const { 25 return __x == __y; 26 } 27}; 28 29template <class _Tp, class _Up> 30struct __desugars_to<__equal_tag, __equal_to, _Tp, _Up> : true_type {}; 31 32// The definition is required because __less is part of the ABI, but it's empty 33// because all comparisons should be transparent. 34template <class _T1 = void, class _T2 = _T1> 35struct __less {}; 36 37template <> 38struct __less<void, void> { 39 template <class _Tp, class _Up> 40 _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 bool operator()(const _Tp& __lhs, const _Up& __rhs) const { 41 return __lhs < __rhs; 42 } 43}; 44 45_LIBCPP_END_NAMESPACE_STD 46 47#endif // _LIBCPP___ALGORITHM_COMP_H 48