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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___ALGORITHM_RANGES_EQUAL_H10#define _LIBCPP___ALGORITHM_RANGES_EQUAL_H11 12#include <__algorithm/equal.h>13#include <__algorithm/unwrap_range.h>14#include <__config>15#include <__functional/identity.h>16#include <__functional/invoke.h>17#include <__functional/ranges_operations.h>18#include <__iterator/concepts.h>19#include <__iterator/distance.h>20#include <__iterator/indirectly_comparable.h>21#include <__ranges/access.h>22#include <__ranges/concepts.h>23#include <__utility/move.h>24 25#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)26# pragma GCC system_header27#endif28 29_LIBCPP_PUSH_MACROS30#include <__undef_macros>31 32#if _LIBCPP_STD_VER >= 2033 34_LIBCPP_BEGIN_NAMESPACE_STD35 36namespace ranges {37struct __equal {38 template <input_iterator _Iter1,39 sentinel_for<_Iter1> _Sent1,40 input_iterator _Iter2,41 sentinel_for<_Iter2> _Sent2,42 class _Pred = ranges::equal_to,43 class _Proj1 = identity,44 class _Proj2 = identity>45 requires indirectly_comparable<_Iter1, _Iter2, _Pred, _Proj1, _Proj2>46 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(47 _Iter1 __first1,48 _Sent1 __last1,49 _Iter2 __first2,50 _Sent2 __last2,51 _Pred __pred = {},52 _Proj1 __proj1 = {},53 _Proj2 __proj2 = {}) const {54 if constexpr (sized_sentinel_for<_Sent1, _Iter1> && sized_sentinel_for<_Sent2, _Iter2>) {55 if (__last1 - __first1 != __last2 - __first2)56 return false;57 }58 auto __unwrapped1 = std::__unwrap_range(std::move(__first1), std::move(__last1));59 auto __unwrapped2 = std::__unwrap_range(std::move(__first2), std::move(__last2));60 return std::__equal_impl(61 std::move(__unwrapped1.first),62 std::move(__unwrapped1.second),63 std::move(__unwrapped2.first),64 std::move(__unwrapped2.second),65 __pred,66 __proj1,67 __proj2);68 }69 70 template <input_range _Range1,71 input_range _Range2,72 class _Pred = ranges::equal_to,73 class _Proj1 = identity,74 class _Proj2 = identity>75 requires indirectly_comparable<iterator_t<_Range1>, iterator_t<_Range2>, _Pred, _Proj1, _Proj2>76 [[nodiscard]] _LIBCPP_HIDE_FROM_ABI constexpr bool operator()(77 _Range1&& __range1, _Range2&& __range2, _Pred __pred = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const {78 if constexpr (sized_range<_Range1> && sized_range<_Range2>) {79 if (ranges::distance(__range1) != ranges::distance(__range2))80 return false;81 }82 auto __unwrapped1 = std::__unwrap_range(ranges::begin(__range1), ranges::end(__range1));83 auto __unwrapped2 = std::__unwrap_range(ranges::begin(__range2), ranges::end(__range2));84 return std::__equal_impl(85 std::move(__unwrapped1.first),86 std::move(__unwrapped1.second),87 std::move(__unwrapped2.first),88 std::move(__unwrapped2.second),89 __pred,90 __proj1,91 __proj2);92 return false;93 }94};95 96inline namespace __cpo {97inline constexpr auto equal = __equal{};98} // namespace __cpo99} // namespace ranges100 101_LIBCPP_END_NAMESPACE_STD102 103#endif // _LIBCPP_STD_VER >= 20104 105_LIBCPP_POP_MACROS106 107#endif // _LIBCPP___ALGORITHM_RANGES_EQUAL_H108