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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_PARTIAL_SORT_H |
10 | #define _LIBCPP___ALGORITHM_RANGES_PARTIAL_SORT_H |
11 | |
12 | #include <__algorithm/iterator_operations.h> |
13 | #include <__algorithm/make_projected.h> |
14 | #include <__algorithm/partial_sort.h> |
15 | #include <__concepts/same_as.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/projected.h> |
24 | #include <__iterator/sortable.h> |
25 | #include <__ranges/access.h> |
26 | #include <__ranges/concepts.h> |
27 | #include <__ranges/dangling.h> |
28 | #include <__utility/forward.h> |
29 | #include <__utility/move.h> |
30 | #include <__utility/pair.h> |
31 | |
32 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
33 | # pragma GCC system_header |
34 | #endif |
35 | |
36 | _LIBCPP_PUSH_MACROS |
37 | #include <__undef_macros> |
38 | |
39 | #if _LIBCPP_STD_VER >= 20 |
40 | |
41 | _LIBCPP_BEGIN_NAMESPACE_STD |
42 | |
43 | namespace ranges { |
44 | struct __partial_sort { |
45 | template <class _Iter, class _Sent, class _Comp, class _Proj> |
46 | _LIBCPP_HIDE_FROM_ABI constexpr static _Iter |
47 | __partial_sort_fn_impl(_Iter __first, _Iter __middle, _Sent __last, _Comp& __comp, _Proj& __proj) { |
48 | auto&& __projected_comp = std::__make_projected(__comp, __proj); |
49 | return std::__partial_sort<_RangeAlgPolicy>(std::move(__first), std::move(__middle), __last, __projected_comp); |
50 | } |
51 | |
52 | template <random_access_iterator _Iter, sentinel_for<_Iter> _Sent, class _Comp = ranges::less, class _Proj = identity> |
53 | requires sortable<_Iter, _Comp, _Proj> |
54 | _LIBCPP_HIDE_FROM_ABI constexpr _Iter |
55 | operator()(_Iter __first, _Iter __middle, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const { |
56 | return __partial_sort_fn_impl(std::move(__first), std::move(__middle), std::move(__last), __comp, __proj); |
57 | } |
58 | |
59 | template <random_access_range _Range, class _Comp = ranges::less, class _Proj = identity> |
60 | requires sortable<iterator_t<_Range>, _Comp, _Proj> |
61 | _LIBCPP_HIDE_FROM_ABI constexpr borrowed_iterator_t<_Range> |
62 | operator()(_Range&& __r, iterator_t<_Range> __middle, _Comp __comp = {}, _Proj __proj = {}) const { |
63 | return __partial_sort_fn_impl(ranges::begin(__r), std::move(__middle), ranges::end(__r), __comp, __proj); |
64 | } |
65 | }; |
66 | |
67 | inline namespace __cpo { |
68 | inline constexpr auto partial_sort = __partial_sort{}; |
69 | } // namespace __cpo |
70 | } // namespace ranges |
71 | |
72 | _LIBCPP_END_NAMESPACE_STD |
73 | |
74 | #endif // _LIBCPP_STD_VER >= 20 |
75 | |
76 | _LIBCPP_POP_MACROS |
77 | |
78 | #endif // _LIBCPP___ALGORITHM_RANGES_PARTIAL_SORT_H |
79 |
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