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
40struct __move_backward {
41  template <class _InIter, class _Sent, class _OutIter>
42  _LIBCPP_HIDE_FROM_ABI constexpr static move_backward_result<_InIter, _OutIter>
43  __move_backward_impl(_InIter __first, _Sent __last, _OutIter __result) {
44    auto __ret = std::__move_backward<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result));
45    return {std::move(__ret.first), std::move(__ret.second)};
46  }
47
48  template <bidirectional_iterator _InIter, sentinel_for<_InIter> _Sent, bidirectional_iterator _OutIter>
49    requires indirectly_movable<_InIter, _OutIter>
50  _LIBCPP_HIDE_FROM_ABI constexpr move_backward_result<_InIter, _OutIter>
51  operator()(_InIter __first, _Sent __last, _OutIter __result) const {
52    return __move_backward_impl(std::move(__first), std::move(__last), std::move(__result));
53  }
54
55  template <bidirectional_range _Range, bidirectional_iterator _Iter>
56    requires indirectly_movable<iterator_t<_Range>, _Iter>
57  _LIBCPP_HIDE_FROM_ABI constexpr move_backward_result<borrowed_iterator_t<_Range>, _Iter>
58  operator()(_Range&& __range, _Iter __result) const {
59    return __move_backward_impl(ranges::begin(__range), ranges::end(__range), std::move(__result));
60  }
61};
62
63inline namespace __cpo {
64inline constexpr auto move_backward = __move_backward{};
65} // namespace __cpo
66} // namespace ranges
67
68_LIBCPP_END_NAMESPACE_STD
69
70#endif // _LIBCPP_STD_VER >= 20
71
72_LIBCPP_POP_MACROS
73
74#endif // _LIBCPP___ALGORITHM_RANGES_MOVE_BACKWARD_H