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_RANGES_PARTIAL_SORT_COPY_H 10 #define _LIBCPP___ALGORITHM_RANGES_PARTIAL_SORT_COPY_H 11 12 #include <__algorithm/in_out_result.h> 13 #include <__algorithm/iterator_operations.h> 14 #include <__algorithm/make_projected.h> 15 #include <__algorithm/partial_sort_copy.h> 16 #include <__config> 17 #include <__functional/identity.h> 18 #include <__functional/ranges_operations.h> 19 #include <__iterator/concepts.h> 20 #include <__iterator/iterator_traits.h> 21 #include <__iterator/projected.h> 22 #include <__iterator/sortable.h> 23 #include <__ranges/access.h> 24 #include <__ranges/concepts.h> 25 #include <__ranges/dangling.h> 26 #include <__utility/move.h> 27 #include <__utility/pair.h> 28 29 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 30 # pragma GCC system_header 31 #endif 32 33 _LIBCPP_PUSH_MACROS 34 #include <__undef_macros> 35 36 #if _LIBCPP_STD_VER >= 20 37 38 _LIBCPP_BEGIN_NAMESPACE_STD 39 40 namespace ranges { 41 42 template <class _InIter, class _OutIter> 43 using partial_sort_copy_result = in_out_result<_InIter, _OutIter>; 44 45 namespace __partial_sort_copy { 46 47 struct __fn { 48 template <input_iterator _Iter1, 49 sentinel_for<_Iter1> _Sent1, 50 random_access_iterator _Iter2, 51 sentinel_for<_Iter2> _Sent2, 52 class _Comp = ranges::less, 53 class _Proj1 = identity, 54 class _Proj2 = identity> 55 requires indirectly_copyable<_Iter1, _Iter2> && sortable<_Iter2, _Comp, _Proj2> && 56 indirect_strict_weak_order<_Comp, projected<_Iter1, _Proj1>, projected<_Iter2, _Proj2>> 57 _LIBCPP_HIDE_FROM_ABI constexpr partial_sort_copy_result<_Iter1, _Iter2> operator()( 58 _Iter1 __first, 59 _Sent1 __last, 60 _Iter2 __result_first, 61 _Sent2 __result_last, 62 _Comp __comp = {}, 63 _Proj1 __proj1 = {}, 64 _Proj2 __proj2 = {}) const { 65 auto __result = std::__partial_sort_copy<_RangeAlgPolicy>( 66 std::move(__first), 67 std::move(__last), 68 std::move(__result_first), 69 std::move(__result_last), 70 __comp, 71 __proj1, 72 __proj2); 73 return {std::move(__result.first), std::move(__result.second)}; 74 } 75 76 template <input_range _Range1, 77 random_access_range _Range2, 78 class _Comp = ranges::less, 79 class _Proj1 = identity, 80 class _Proj2 = identity> 81 requires indirectly_copyable<iterator_t<_Range1>, iterator_t<_Range2>> && 82 sortable<iterator_t<_Range2>, _Comp, _Proj2> && 83 indirect_strict_weak_order<_Comp, 84 projected<iterator_t<_Range1>, _Proj1>, 85 projected<iterator_t<_Range2>, _Proj2>> 86 _LIBCPP_HIDE_FROM_ABI constexpr partial_sort_copy_result<borrowed_iterator_t<_Range1>, borrowed_iterator_t<_Range2>> 87 operator()( 88 _Range1&& __range, _Range2&& __result_range, _Comp __comp = {}, _Proj1 __proj1 = {}, _Proj2 __proj2 = {}) const { 89 auto __result = std::__partial_sort_copy<_RangeAlgPolicy>( 90 ranges::begin(__range), 91 ranges::end(__range), 92 ranges::begin(__result_range), 93 ranges::end(__result_range), 94 __comp, 95 __proj1, 96 __proj2); 97 return {std::move(__result.first), std::move(__result.second)}; 98 } 99 }; 100 101 } // namespace __partial_sort_copy 102 103 inline namespace __cpo { 104 inline constexpr auto partial_sort_copy = __partial_sort_copy::__fn{}; 105 } // namespace __cpo 106 } // namespace ranges 107 108 _LIBCPP_END_NAMESPACE_STD 109 110 #endif // _LIBCPP_STD_VER >= 20 111 112 _LIBCPP_POP_MACROS 113 114 #endif // _LIBCPP___ALGORITHM_RANGES_PARTIAL_SORT_COPY_H 115