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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_PREV_PERMUTATION_H10#define _LIBCPP___ALGORITHM_RANGES_PREV_PERMUTATION_H11 12#include <__algorithm/in_found_result.h>13#include <__algorithm/iterator_operations.h>14#include <__algorithm/make_projected.h>15#include <__algorithm/prev_permutation.h>16#include <__config>17#include <__functional/identity.h>18#include <__functional/ranges_operations.h>19#include <__iterator/concepts.h>20#include <__iterator/sortable.h>21#include <__ranges/access.h>22#include <__ranges/concepts.h>23#include <__ranges/dangling.h>24#include <__utility/move.h>25#include <__utility/pair.h>26 27#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)28# pragma GCC system_header29#endif30 31_LIBCPP_PUSH_MACROS32#include <__undef_macros>33 34#if _LIBCPP_STD_VER >= 2035 36_LIBCPP_BEGIN_NAMESPACE_STD37 38namespace ranges {39 40template <class _InIter>41using prev_permutation_result = in_found_result<_InIter>;42 43struct __prev_permutation {44 template <bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent, class _Comp = ranges::less, class _Proj = identity>45 requires sortable<_Iter, _Comp, _Proj>46 _LIBCPP_HIDE_FROM_ABI constexpr prev_permutation_result<_Iter>47 operator()(_Iter __first, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const {48 auto __result = std::__prev_permutation<_RangeAlgPolicy>(49 std::move(__first), std::move(__last), std::__make_projected(__comp, __proj));50 return {std::move(__result.first), std::move(__result.second)};51 }52 53 template <bidirectional_range _Range, class _Comp = ranges::less, class _Proj = identity>54 requires sortable<iterator_t<_Range>, _Comp, _Proj>55 _LIBCPP_HIDE_FROM_ABI constexpr prev_permutation_result<borrowed_iterator_t<_Range>>56 operator()(_Range&& __range, _Comp __comp = {}, _Proj __proj = {}) const {57 auto __result = std::__prev_permutation<_RangeAlgPolicy>(58 ranges::begin(__range), ranges::end(__range), std::__make_projected(__comp, __proj));59 return {std::move(__result.first), std::move(__result.second)};60 }61};62 63inline namespace __cpo {64constexpr inline auto prev_permutation = __prev_permutation{};65} // namespace __cpo66} // namespace ranges67 68_LIBCPP_END_NAMESPACE_STD69 70#endif // _LIBCPP_STD_VER >= 2071 72_LIBCPP_POP_MACROS73 74#endif // _LIBCPP___ALGORITHM_RANGES_PREV_PERMUTATION_H75