xref: /freebsd-src/contrib/llvm-project/libcxx/include/__algorithm/ranges_copy_backward.h (revision b3edf4467982447620505a28fc82e38a414c07dc)
181ad6265SDimitry Andric //===----------------------------------------------------------------------===//
281ad6265SDimitry Andric //
381ad6265SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
481ad6265SDimitry Andric // See https://llvm.org/LICENSE.txt for license information.
581ad6265SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
681ad6265SDimitry Andric //
781ad6265SDimitry Andric //===----------------------------------------------------------------------===//
881ad6265SDimitry Andric 
981ad6265SDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_COPY_BACKWARD_H
1081ad6265SDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_COPY_BACKWARD_H
1181ad6265SDimitry Andric 
1281ad6265SDimitry Andric #include <__algorithm/copy_backward.h>
1381ad6265SDimitry Andric #include <__algorithm/in_out_result.h>
14972a253aSDimitry Andric #include <__algorithm/iterator_operations.h>
1581ad6265SDimitry Andric #include <__config>
1681ad6265SDimitry Andric #include <__iterator/concepts.h>
1781ad6265SDimitry Andric #include <__ranges/access.h>
1881ad6265SDimitry Andric #include <__ranges/concepts.h>
1981ad6265SDimitry Andric #include <__ranges/dangling.h>
2081ad6265SDimitry Andric #include <__utility/move.h>
2181ad6265SDimitry Andric 
2281ad6265SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
2381ad6265SDimitry Andric #  pragma GCC system_header
2481ad6265SDimitry Andric #endif
2581ad6265SDimitry Andric 
26*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS
27*b3edf446SDimitry Andric #include <__undef_macros>
28*b3edf446SDimitry Andric 
2906c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20
3081ad6265SDimitry Andric 
3181ad6265SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD
3281ad6265SDimitry Andric 
3381ad6265SDimitry Andric namespace ranges {
3481ad6265SDimitry Andric 
3581ad6265SDimitry Andric template <class _Ip, class _Op>
3681ad6265SDimitry Andric using copy_backward_result = in_out_result<_Ip, _Op>;
3781ad6265SDimitry Andric 
3881ad6265SDimitry Andric namespace __copy_backward {
3981ad6265SDimitry Andric struct __fn {
4081ad6265SDimitry Andric   template <bidirectional_iterator _InIter1, sentinel_for<_InIter1> _Sent1, bidirectional_iterator _InIter2>
4181ad6265SDimitry Andric     requires indirectly_copyable<_InIter1, _InIter2>
4206c3fb27SDimitry Andric   _LIBCPP_HIDE_FROM_ABI constexpr copy_backward_result<_InIter1, _InIter2>
operator__fn4306c3fb27SDimitry Andric   operator()(_InIter1 __first, _Sent1 __last, _InIter2 __result) const {
44972a253aSDimitry Andric     auto __ret = std::__copy_backward<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result));
4581ad6265SDimitry Andric     return {std::move(__ret.first), std::move(__ret.second)};
4681ad6265SDimitry Andric   }
4781ad6265SDimitry Andric 
4881ad6265SDimitry Andric   template <bidirectional_range _Range, bidirectional_iterator _Iter>
4981ad6265SDimitry Andric     requires indirectly_copyable<iterator_t<_Range>, _Iter>
5006c3fb27SDimitry Andric   _LIBCPP_HIDE_FROM_ABI constexpr copy_backward_result<borrowed_iterator_t<_Range>, _Iter>
operator__fn5106c3fb27SDimitry Andric   operator()(_Range&& __r, _Iter __result) const {
52972a253aSDimitry Andric     auto __ret = std::__copy_backward<_RangeAlgPolicy>(ranges::begin(__r), ranges::end(__r), std::move(__result));
5381ad6265SDimitry Andric     return {std::move(__ret.first), std::move(__ret.second)};
5481ad6265SDimitry Andric   }
5581ad6265SDimitry Andric };
5681ad6265SDimitry Andric } // namespace __copy_backward
5781ad6265SDimitry Andric 
5881ad6265SDimitry Andric inline namespace __cpo {
5981ad6265SDimitry Andric inline constexpr auto copy_backward = __copy_backward::__fn{};
6081ad6265SDimitry Andric } // namespace __cpo
6181ad6265SDimitry Andric } // namespace ranges
6281ad6265SDimitry Andric 
6381ad6265SDimitry Andric _LIBCPP_END_NAMESPACE_STD
6481ad6265SDimitry Andric 
6506c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20
6681ad6265SDimitry Andric 
67*b3edf446SDimitry Andric _LIBCPP_POP_MACROS
68*b3edf446SDimitry Andric 
6981ad6265SDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_COPY_BACKWARD_H
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