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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-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___ALGORITHM_RANGES_STABLE_PARTITION_H |
| 10 | #define _LIBCPP___ALGORITHM_RANGES_STABLE_PARTITION_H |
| 11 | |
| 12 | #include <__algorithm/iterator_operations.h> |
| 13 | #include <__algorithm/make_projected.h> |
| 14 | #include <__algorithm/ranges_iterator_concept.h> |
| 15 | #include <__algorithm/stable_partition.h> |
| 16 | #include <__config> |
| 17 | #include <__functional/identity.h> |
| 18 | #include <__functional/invoke.h> |
| 19 | #include <__functional/ranges_operations.h> |
| 20 | #include <__iterator/concepts.h> |
| 21 | #include <__iterator/iterator_traits.h> |
| 22 | #include <__iterator/next.h> |
| 23 | #include <__iterator/permutable.h> |
| 24 | #include <__iterator/projected.h> |
| 25 | #include <__ranges/access.h> |
| 26 | #include <__ranges/concepts.h> |
| 27 | #include <__ranges/dangling.h> |
| 28 | #include <__ranges/subrange.h> |
| 29 | #include <__type_traits/remove_cvref.h> |
| 30 | #include <__utility/forward.h> |
| 31 | #include <__utility/move.h> |
| 32 | |
| 33 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 34 | # pragma GCC system_header |
| 35 | #endif |
| 36 | |
| 37 | _LIBCPP_PUSH_MACROS |
| 38 | #include <__undef_macros> |
| 39 | |
| 40 | #if _LIBCPP_STD_VER >= 20 |
| 41 | |
| 42 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 43 | |
| 44 | namespace ranges { |
| 45 | struct __stable_partition { |
| 46 | template <class _Iter, class _Sent, class _Proj, class _Pred> |
| 47 | _LIBCPP_HIDE_FROM_ABI static _LIBCPP_CONSTEXPR_SINCE_CXX26 subrange<__remove_cvref_t<_Iter>> |
| 48 | __stable_partition_fn_impl(_Iter&& __first, _Sent&& __last, _Pred&& __pred, _Proj&& __proj) { |
| 49 | auto __last_iter = ranges::next(__first, __last); |
| 50 | |
| 51 | auto&& __projected_pred = std::__make_projected(__pred, __proj); |
| 52 | auto __result = std::__stable_partition<_RangeAlgPolicy>( |
| 53 | std::move(__first), __last_iter, __projected_pred, __iterator_concept<_Iter>()); |
| 54 | |
| 55 | return {std::move(__result), std::move(__last_iter)}; |
| 56 | } |
| 57 | |
| 58 | template <bidirectional_iterator _Iter, |
| 59 | sentinel_for<_Iter> _Sent, |
| 60 | class _Proj = identity, |
| 61 | indirect_unary_predicate<projected<_Iter, _Proj>> _Pred> |
| 62 | requires permutable<_Iter> |
| 63 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 subrange<_Iter> |
| 64 | operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const { |
| 65 | return __stable_partition_fn_impl(__first, __last, __pred, __proj); |
| 66 | } |
| 67 | |
| 68 | template <bidirectional_range _Range, |
| 69 | class _Proj = identity, |
| 70 | indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred> |
| 71 | requires permutable<iterator_t<_Range>> |
| 72 | _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX26 borrowed_subrange_t<_Range> |
| 73 | operator()(_Range&& __range, _Pred __pred, _Proj __proj = {}) const { |
| 74 | return __stable_partition_fn_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj); |
| 75 | } |
| 76 | }; |
| 77 | |
| 78 | inline namespace __cpo { |
| 79 | inline constexpr auto stable_partition = __stable_partition{}; |
| 80 | } // namespace __cpo |
| 81 | } // namespace ranges |
| 82 | |
| 83 | _LIBCPP_END_NAMESPACE_STD |
| 84 | |
| 85 | #endif // _LIBCPP_STD_VER >= 20 |
| 86 | |
| 87 | _LIBCPP_POP_MACROS |
| 88 | |
| 89 | #endif // _LIBCPP___ALGORITHM_RANGES_STABLE_PARTITION_H |
| 90 |
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