v1/__algorithm/ranges_move_backward.h

0001 //===----------------------------------------------------------------------===//
0002 //
0003 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
0004 // See https://llvm.org/LICENSE.txt for license information.
0005 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
0006 //
0007 //===----------------------------------------------------------------------===//
0008
0009 #ifndef _LIBCPP___ALGORITHM_RANGES_MOVE_BACKWARD_H
0010 #define _LIBCPP___ALGORITHM_RANGES_MOVE_BACKWARD_H
0011
0012 #include <__algorithm/in_out_result.h>
0013 #include <__algorithm/iterator_operations.h>
0014 #include <__algorithm/move_backward.h>
0015 #include <__config>
0016 #include <__iterator/concepts.h>
0017 #include <__iterator/iter_move.h>
0018 #include <__iterator/next.h>
0019 #include <__ranges/access.h>
0020 #include <__ranges/concepts.h>
0021 #include <__ranges/dangling.h>
0022 #include <__utility/move.h>
0023
0024 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
0025 #  pragma GCC system_header
0026 #endif
0027
0028 _LIBCPP_PUSH_MACROS
0029 #include <__undef_macros>
0030
0031 #if _LIBCPP_STD_VER >= 20
0032
0033 _LIBCPP_BEGIN_NAMESPACE_STD
0034
0035 namespace ranges {
0036
0037 template <class _InIter, class _OutIter>
0038 using move_backward_result = in_out_result<_InIter, _OutIter>;
0039
0040 struct __move_backward {
0041   template <class _InIter, class _Sent, class _OutIter>
0042   _LIBCPP_HIDE_FROM_ABI constexpr static move_backward_result<_InIter, _OutIter>
0043   __move_backward_impl(_InIter __first, _Sent __last, _OutIter __result) {
0044     auto __ret = std::__move_backward<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result));
0045     return {std::move(__ret.first), std::move(__ret.second)};
0046   }
0047
0048   template <bidirectional_iterator _InIter, sentinel_for<_InIter> _Sent, bidirectional_iterator _OutIter>
0049     requires indirectly_movable<_InIter, _OutIter>
0050   _LIBCPP_HIDE_FROM_ABI constexpr move_backward_result<_InIter, _OutIter>
0051   operator()(_InIter __first, _Sent __last, _OutIter __result) const {
0052     return __move_backward_impl(std::move(__first), std::move(__last), std::move(__result));
0053   }
0054
0055   template <bidirectional_range _Range, bidirectional_iterator _Iter>
0056     requires indirectly_movable<iterator_t<_Range>, _Iter>
0057   _LIBCPP_HIDE_FROM_ABI constexpr move_backward_result<borrowed_iterator_t<_Range>, _Iter>
0058   operator()(_Range&& __range, _Iter __result) const {
0059     return __move_backward_impl(ranges::begin(__range), ranges::end(__range), std::move(__result));
0060   }
0061 };
0062
0063 inline namespace __cpo {
0064 inline constexpr auto move_backward = __move_backward{};
0065 } // namespace __cpo
0066 } // namespace ranges
0067
0068 _LIBCPP_END_NAMESPACE_STD
0069
0070 #endif // _LIBCPP_STD_VER >= 20
0071
0072 _LIBCPP_POP_MACROS
0073
0074 #endif // _LIBCPP___ALGORITHM_RANGES_MOVE_BACKWARD_H