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comparison libcxx/include/__algorithm/ranges_rotate.h @ 236:c4bab56944e8 llvm-original

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LLVM 16
author kono
date Wed, 09 Nov 2022 17:45:10 +0900
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children 1f2b6ac9f198
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232:70dce7da266c 236:c4bab56944e8
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_ROTATE_H
10 #define _LIBCPP___ALGORITHM_RANGES_ROTATE_H
11
12 #include <__algorithm/iterator_operations.h>
13 #include <__algorithm/ranges_iterator_concept.h>
14 #include <__algorithm/rotate.h>
15 #include <__config>
16 #include <__iterator/concepts.h>
17 #include <__iterator/iterator_traits.h>
18 #include <__iterator/permutable.h>
19 #include <__ranges/access.h>
20 #include <__ranges/concepts.h>
21 #include <__ranges/subrange.h>
22 #include <__utility/move.h>
23
24 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
25 # pragma GCC system_header
26 #endif
27
28 #if _LIBCPP_STD_VER > 17
29
30 _LIBCPP_BEGIN_NAMESPACE_STD
31
32 namespace ranges {
33 namespace __rotate {
34
35 struct __fn {
36
37 template <class _Iter, class _Sent>
38 _LIBCPP_HIDE_FROM_ABI constexpr
39 static subrange<_Iter> __rotate_fn_impl(_Iter __first, _Iter __middle, _Sent __last) {
40 auto __ret = std::__rotate<_RangeAlgPolicy>(
41 std::move(__first), std::move(__middle), std::move(__last));
42 return {std::move(__ret.first), std::move(__ret.second)};
43 }
44
45 template <permutable _Iter, sentinel_for<_Iter> _Sent>
46 _LIBCPP_HIDE_FROM_ABI constexpr
47 subrange<_Iter> operator()(_Iter __first, _Iter __middle, _Sent __last) const {
48 return __rotate_fn_impl(std::move(__first), std::move(__middle), std::move(__last));
49 }
50
51 template <forward_range _Range>
52 requires permutable<iterator_t<_Range>>
53 _LIBCPP_HIDE_FROM_ABI constexpr
54 borrowed_subrange_t<_Range> operator()(_Range&& __range, iterator_t<_Range> __middle) const {
55 return __rotate_fn_impl(ranges::begin(__range), std::move(__middle), ranges::end(__range));
56 }
57
58 };
59
60 } // namespace __rotate
61
62 inline namespace __cpo {
63 inline constexpr auto rotate = __rotate::__fn{};
64 } // namespace __cpo
65 } // namespace ranges
66
67 _LIBCPP_END_NAMESPACE_STD
68
69 #endif // _LIBCPP_STD_VER > 17
70
71 #endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_H