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_MOVE_BACKWARD_H
10#define _LIBCPP___ALGORITHM_RANGES_MOVE_BACKWARD_H
11
12#include <__algorithm/in_out_result.h>
13#include <__algorithm/iterator_operations.h>
14#include <__algorithm/move_backward.h>
15#include <__config>
16#include <__iterator/concepts.h>
17#include <__iterator/iter_move.h>
18#include <__iterator/next.h>
19#include <__ranges/access.h>
20#include <__ranges/concepts.h>
21#include <__ranges/dangling.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_LIBCPP_PUSH_MACROS
29#include <__undef_macros>
30
31#if _LIBCPP_STD_VER >= 20
32
33_LIBCPP_BEGIN_NAMESPACE_STD
34
35namespace ranges {
36
37template <class _InIter, class _OutIter>
38using move_backward_result = in_out_result<_InIter, _OutIter>;
39
40namespace __move_backward {
41struct __fn {
42  template <class _InIter, class _Sent, class _OutIter>
43  _LIBCPP_HIDE_FROM_ABI constexpr static move_backward_result<_InIter, _OutIter>
44  __move_backward_impl(_InIter __first, _Sent __last, _OutIter __result) {
45    auto __ret = std::__move_backward<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result));
46    return {std::move(__ret.first), std::move(__ret.second)};
47  }
48
49  template <bidirectional_iterator _InIter, sentinel_for<_InIter> _Sent, bidirectional_iterator _OutIter>
50    requires indirectly_movable<_InIter, _OutIter>
51  _LIBCPP_HIDE_FROM_ABI constexpr move_backward_result<_InIter, _OutIter>
52  operator()(_InIter __first, _Sent __last, _OutIter __result) const {
53    return __move_backward_impl(std::move(__first), std::move(__last), std::move(__result));
54  }
55
56  template <bidirectional_range _Range, bidirectional_iterator _Iter>
57    requires indirectly_movable<iterator_t<_Range>, _Iter>
58  _LIBCPP_HIDE_FROM_ABI constexpr move_backward_result<borrowed_iterator_t<_Range>, _Iter>
59  operator()(_Range&& __range, _Iter __result) const {
60    return __move_backward_impl(ranges::begin(__range), ranges::end(__range), std::move(__result));
61  }
62};
63} // namespace __move_backward
64
65inline namespace __cpo {
66inline constexpr auto move_backward = __move_backward::__fn{};
67} // namespace __cpo
68} // namespace ranges
69
70_LIBCPP_END_NAMESPACE_STD
71
72#endif // _LIBCPP_STD_VER >= 20
73
74_LIBCPP_POP_MACROS
75
76#endif // _LIBCPP___ALGORITHM_RANGES_MOVE_BACKWARD_H
77