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_COPY_H
10#define _LIBCPP___ALGORITHM_RANGES_COPY_H
11
12#include <__algorithm/copy.h>
13#include <__algorithm/in_out_result.h>
14#include <__config>
15#include <__functional/identity.h>
16#include <__iterator/concepts.h>
17#include <__ranges/access.h>
18#include <__ranges/concepts.h>
19#include <__ranges/dangling.h>
20#include <__utility/move.h>
21#include <__utility/pair.h>
22
23#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
24# pragma GCC system_header
25#endif
26
27_LIBCPP_PUSH_MACROS
28#include <__undef_macros>
29
30#if _LIBCPP_STD_VER >= 20
31
32_LIBCPP_BEGIN_NAMESPACE_STD
33
34namespace ranges {
35
36template <class _InIter, class _OutIter>
37using copy_result = in_out_result<_InIter, _OutIter>;
38
39struct __copy {
40 template <input_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter>
41 requires indirectly_copyable<_InIter, _OutIter>
42 _LIBCPP_HIDE_FROM_ABI constexpr copy_result<_InIter, _OutIter>
43 operator()(_InIter __first, _Sent __last, _OutIter __result) const {
44 auto __ret = std::__copy(std::move(__first), std::move(__last), std::move(__result));
45 return {std::move(__ret.first), std::move(__ret.second)};
46 }
47
48 template <input_range _Range, weakly_incrementable _OutIter>
49 requires indirectly_copyable<iterator_t<_Range>, _OutIter>
50 _LIBCPP_HIDE_FROM_ABI constexpr copy_result<borrowed_iterator_t<_Range>, _OutIter>
51 operator()(_Range&& __r, _OutIter __result) const {
52 auto __ret = std::__copy(ranges::begin(__r), ranges::end(__r), std::move(__result));
53 return {std::move(__ret.first), std::move(__ret.second)};
54 }
55};
56
57inline namespace __cpo {
58inline constexpr auto copy = __copy{};
59} // namespace __cpo
60} // namespace ranges
61
62_LIBCPP_END_NAMESPACE_STD
63
64#endif // _LIBCPP_STD_VER >= 20
65
66_LIBCPP_POP_MACROS
67
68#endif // _LIBCPP___ALGORITHM_RANGES_COPY_H
69