xref: /freebsd/contrib/llvm-project/libcxx/include/__algorithm/ranges_copy.h (revision 66fd12cf4896eb08ad8e7a2627537f84ead84dd3)
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 <__algorithm/iterator_operations.h>
15 #include <__config>
16 #include <__functional/identity.h>
17 #include <__iterator/concepts.h>
18 #include <__ranges/access.h>
19 #include <__ranges/concepts.h>
20 #include <__ranges/dangling.h>
21 #include <__utility/move.h>
22 #include <__utility/pair.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 
34 template <class _InIter, class _OutIter>
35 using copy_result = in_out_result<_InIter, _OutIter>;
36 
37 namespace __copy {
38 struct __fn {
39 
40   template <input_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter>
41     requires indirectly_copyable<_InIter, _OutIter>
42   _LIBCPP_HIDE_FROM_ABI constexpr
43   copy_result<_InIter, _OutIter> operator()(_InIter __first, _Sent __last, _OutIter __result) const {
44     auto __ret = std::__copy<_RangeAlgPolicy>(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
51   copy_result<borrowed_iterator_t<_Range>, _OutIter> operator()(_Range&& __r, _OutIter __result) const {
52     auto __ret = std::__copy<_RangeAlgPolicy>(ranges::begin(__r), ranges::end(__r), std::move(__result));
53     return {std::move(__ret.first), std::move(__ret.second)};
54   }
55 };
56 } // namespace __copy
57 
58 inline namespace __cpo {
59   inline constexpr auto copy = __copy::__fn{};
60 } // namespace __cpo
61 } // namespace ranges
62 
63 _LIBCPP_END_NAMESPACE_STD
64 
65 #endif // _LIBCPP_STD_VER > 17
66 
67 #endif // _LIBCPP___ALGORITHM_RANGES_COPY_H
68