xref: /freebsd-src/contrib/llvm-project/libcxx/include/__algorithm/ranges_stable_partition.h (revision b3edf4467982447620505a28fc82e38a414c07dc)
1753f127fSDimitry Andric //===----------------------------------------------------------------------===//
2753f127fSDimitry Andric //
3753f127fSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4753f127fSDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
5753f127fSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6753f127fSDimitry Andric //
7753f127fSDimitry Andric //===----------------------------------------------------------------------===//
8753f127fSDimitry Andric 
9753f127fSDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_STABLE_PARTITION_H
10753f127fSDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_STABLE_PARTITION_H
11753f127fSDimitry Andric 
12fcaf7f86SDimitry Andric #include <__algorithm/iterator_operations.h>
13753f127fSDimitry Andric #include <__algorithm/make_projected.h>
14fcaf7f86SDimitry Andric #include <__algorithm/ranges_iterator_concept.h>
15753f127fSDimitry Andric #include <__algorithm/stable_partition.h>
16753f127fSDimitry Andric #include <__config>
17753f127fSDimitry Andric #include <__functional/identity.h>
18753f127fSDimitry Andric #include <__functional/invoke.h>
19753f127fSDimitry Andric #include <__functional/ranges_operations.h>
20753f127fSDimitry Andric #include <__iterator/concepts.h>
21753f127fSDimitry Andric #include <__iterator/iterator_traits.h>
22fcaf7f86SDimitry Andric #include <__iterator/next.h>
23753f127fSDimitry Andric #include <__iterator/permutable.h>
24753f127fSDimitry Andric #include <__iterator/projected.h>
25753f127fSDimitry Andric #include <__ranges/access.h>
26753f127fSDimitry Andric #include <__ranges/concepts.h>
27753f127fSDimitry Andric #include <__ranges/dangling.h>
28753f127fSDimitry Andric #include <__ranges/subrange.h>
2906c3fb27SDimitry Andric #include <__type_traits/remove_cvref.h>
30753f127fSDimitry Andric #include <__utility/forward.h>
31753f127fSDimitry Andric #include <__utility/move.h>
32753f127fSDimitry Andric 
33753f127fSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
34753f127fSDimitry Andric #  pragma GCC system_header
35753f127fSDimitry Andric #endif
36753f127fSDimitry Andric 
37*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS
38*b3edf446SDimitry Andric #include <__undef_macros>
39*b3edf446SDimitry Andric 
4006c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20
41753f127fSDimitry Andric 
42753f127fSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
43753f127fSDimitry Andric 
44753f127fSDimitry Andric namespace ranges {
45753f127fSDimitry Andric namespace __stable_partition {
46753f127fSDimitry Andric 
47753f127fSDimitry Andric struct __fn {
48fcaf7f86SDimitry Andric   template <class _Iter, class _Sent, class _Proj, class _Pred>
4906c3fb27SDimitry Andric   _LIBCPP_HIDE_FROM_ABI static subrange<__remove_cvref_t<_Iter>>
__stable_partition_fn_impl__fn5006c3fb27SDimitry Andric   __stable_partition_fn_impl(_Iter&& __first, _Sent&& __last, _Pred&& __pred, _Proj&& __proj) {
51fcaf7f86SDimitry Andric     auto __last_iter = ranges::next(__first, __last);
52fcaf7f86SDimitry Andric 
5361cfbce3SDimitry Andric     auto&& __projected_pred = std::__make_projected(__pred, __proj);
54fcaf7f86SDimitry Andric     auto __result           = std::__stable_partition<_RangeAlgPolicy>(
55fcaf7f86SDimitry Andric         std::move(__first), __last_iter, __projected_pred, __iterator_concept<_Iter>());
56fcaf7f86SDimitry Andric 
57fcaf7f86SDimitry Andric     return {std::move(__result), std::move(__last_iter)};
58fcaf7f86SDimitry Andric   }
59fcaf7f86SDimitry Andric 
6006c3fb27SDimitry Andric   template <bidirectional_iterator _Iter,
6106c3fb27SDimitry Andric             sentinel_for<_Iter> _Sent,
6206c3fb27SDimitry Andric             class _Proj = identity,
63753f127fSDimitry Andric             indirect_unary_predicate<projected<_Iter, _Proj>> _Pred>
64753f127fSDimitry Andric     requires permutable<_Iter>
operator__fn6506c3fb27SDimitry Andric   _LIBCPP_HIDE_FROM_ABI subrange<_Iter> operator()(_Iter __first, _Sent __last, _Pred __pred, _Proj __proj = {}) const {
66fcaf7f86SDimitry Andric     return __stable_partition_fn_impl(__first, __last, __pred, __proj);
67753f127fSDimitry Andric   }
68753f127fSDimitry Andric 
6906c3fb27SDimitry Andric   template <bidirectional_range _Range,
7006c3fb27SDimitry Andric             class _Proj = identity,
71753f127fSDimitry Andric             indirect_unary_predicate<projected<iterator_t<_Range>, _Proj>> _Pred>
72753f127fSDimitry Andric     requires permutable<iterator_t<_Range>>
7306c3fb27SDimitry Andric   _LIBCPP_HIDE_FROM_ABI borrowed_subrange_t<_Range>
operator__fn7406c3fb27SDimitry Andric   operator()(_Range&& __range, _Pred __pred, _Proj __proj = {}) const {
75fcaf7f86SDimitry Andric     return __stable_partition_fn_impl(ranges::begin(__range), ranges::end(__range), __pred, __proj);
76753f127fSDimitry Andric   }
77753f127fSDimitry Andric };
78753f127fSDimitry Andric 
79753f127fSDimitry Andric } // namespace __stable_partition
80753f127fSDimitry Andric 
81753f127fSDimitry Andric inline namespace __cpo {
82753f127fSDimitry Andric inline constexpr auto stable_partition = __stable_partition::__fn{};
83753f127fSDimitry Andric } // namespace __cpo
84753f127fSDimitry Andric } // namespace ranges
85753f127fSDimitry Andric 
86753f127fSDimitry Andric _LIBCPP_END_NAMESPACE_STD
87753f127fSDimitry Andric 
8806c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20
89753f127fSDimitry Andric 
90*b3edf446SDimitry Andric _LIBCPP_POP_MACROS
91*b3edf446SDimitry Andric 
92753f127fSDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_STABLE_PARTITION_H
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