xref: /freebsd-src/contrib/llvm-project/libcxx/include/__algorithm/ranges_inplace_merge.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_INPLACE_MERGE_H
10753f127fSDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_INPLACE_MERGE_H
11753f127fSDimitry Andric 
12753f127fSDimitry Andric #include <__algorithm/inplace_merge.h>
1361cfbce3SDimitry Andric #include <__algorithm/iterator_operations.h>
14753f127fSDimitry Andric #include <__algorithm/make_projected.h>
15753f127fSDimitry Andric #include <__config>
16753f127fSDimitry Andric #include <__functional/identity.h>
17753f127fSDimitry Andric #include <__functional/invoke.h>
18753f127fSDimitry Andric #include <__functional/ranges_operations.h>
19753f127fSDimitry Andric #include <__iterator/concepts.h>
20753f127fSDimitry Andric #include <__iterator/iterator_traits.h>
2161cfbce3SDimitry Andric #include <__iterator/next.h>
22753f127fSDimitry Andric #include <__iterator/projected.h>
23753f127fSDimitry Andric #include <__iterator/sortable.h>
24753f127fSDimitry Andric #include <__ranges/access.h>
25753f127fSDimitry Andric #include <__ranges/concepts.h>
26753f127fSDimitry Andric #include <__ranges/dangling.h>
27753f127fSDimitry Andric #include <__utility/forward.h>
28753f127fSDimitry Andric #include <__utility/move.h>
29753f127fSDimitry Andric 
30753f127fSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
31753f127fSDimitry Andric #  pragma GCC system_header
32753f127fSDimitry Andric #endif
33753f127fSDimitry Andric 
34*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS
35*b3edf446SDimitry Andric #include <__undef_macros>
36*b3edf446SDimitry Andric 
3706c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20
38753f127fSDimitry Andric 
39753f127fSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
40753f127fSDimitry Andric 
41753f127fSDimitry Andric namespace ranges {
42753f127fSDimitry Andric namespace __inplace_merge {
43753f127fSDimitry Andric 
44753f127fSDimitry Andric struct __fn {
4561cfbce3SDimitry Andric   template <class _Iter, class _Sent, class _Comp, class _Proj>
4661cfbce3SDimitry Andric   _LIBCPP_HIDE_FROM_ABI static constexpr auto
__inplace_merge_impl__fn4761cfbce3SDimitry Andric   __inplace_merge_impl(_Iter __first, _Iter __middle, _Sent __last, _Comp&& __comp, _Proj&& __proj) {
4861cfbce3SDimitry Andric     auto __last_iter = ranges::next(__middle, __last);
4961cfbce3SDimitry Andric     std::__inplace_merge<_RangeAlgPolicy>(
5061cfbce3SDimitry Andric         std::move(__first), std::move(__middle), __last_iter, std::__make_projected(__comp, __proj));
5161cfbce3SDimitry Andric     return __last_iter;
5261cfbce3SDimitry Andric   }
53753f127fSDimitry Andric 
5406c3fb27SDimitry Andric   template <bidirectional_iterator _Iter, sentinel_for<_Iter> _Sent, class _Comp = ranges::less, class _Proj = identity>
55753f127fSDimitry Andric     requires sortable<_Iter, _Comp, _Proj>
5661cfbce3SDimitry Andric   _LIBCPP_HIDE_FROM_ABI _Iter
operator__fn5761cfbce3SDimitry Andric   operator()(_Iter __first, _Iter __middle, _Sent __last, _Comp __comp = {}, _Proj __proj = {}) const {
5861cfbce3SDimitry Andric     return __inplace_merge_impl(
5961cfbce3SDimitry Andric         std::move(__first), std::move(__middle), std::move(__last), std::move(__comp), std::move(__proj));
60753f127fSDimitry Andric   }
61753f127fSDimitry Andric 
62753f127fSDimitry Andric   template <bidirectional_range _Range, class _Comp = ranges::less, class _Proj = identity>
6306c3fb27SDimitry Andric     requires sortable<iterator_t<_Range>, _Comp, _Proj>
6406c3fb27SDimitry Andric   _LIBCPP_HIDE_FROM_ABI borrowed_iterator_t<_Range>
operator__fn6561cfbce3SDimitry Andric   operator()(_Range&& __range, iterator_t<_Range> __middle, _Comp __comp = {}, _Proj __proj = {}) const {
6661cfbce3SDimitry Andric     return __inplace_merge_impl(
6761cfbce3SDimitry Andric         ranges::begin(__range), std::move(__middle), ranges::end(__range), std::move(__comp), std::move(__proj));
68753f127fSDimitry Andric   }
69753f127fSDimitry Andric };
70753f127fSDimitry Andric 
71753f127fSDimitry Andric } // namespace __inplace_merge
72753f127fSDimitry Andric 
73753f127fSDimitry Andric inline namespace __cpo {
74753f127fSDimitry Andric inline constexpr auto inplace_merge = __inplace_merge::__fn{};
75753f127fSDimitry Andric } // namespace __cpo
76753f127fSDimitry Andric } // namespace ranges
77753f127fSDimitry Andric 
78753f127fSDimitry Andric _LIBCPP_END_NAMESPACE_STD
79753f127fSDimitry Andric 
8006c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20
81753f127fSDimitry Andric 
82*b3edf446SDimitry Andric _LIBCPP_POP_MACROS
83*b3edf446SDimitry Andric 
84753f127fSDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_INPLACE_MERGE_H
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