libcxx/include/__cxx03/__algorithm/ranges_move_backward.h

   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 <__cxx03/__algorithm/in_out_result.h>
  13 #include <__cxx03/__algorithm/iterator_operations.h>
  14 #include <__cxx03/__algorithm/move_backward.h>
  15 #include <__cxx03/__config>
  16 #include <__cxx03/__iterator/concepts.h>
  17 #include <__cxx03/__iterator/iter_move.h>
  18 #include <__cxx03/__iterator/next.h>
  19 #include <__cxx03/__ranges/access.h>
  20 #include <__cxx03/__ranges/concepts.h>
  21 #include <__cxx03/__ranges/dangling.h>
  22 #include <__cxx03/__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 <__cxx03/__undef_macros>
  30
  31 #if _LIBCPP_STD_VER >= 20
  32
  33 _LIBCPP_BEGIN_NAMESPACE_STD
  34
  35 namespace ranges {
  36
  37 template <class _InIter, class _OutIter>
  38 using move_backward_result = in_out_result<_InIter, _OutIter>;
  39
  40 namespace __move_backward {
  41 struct __fn {
  42   template <class _InIter, class _Sent, class _OutIter>
  43   _LIBCPP_HIDE_FROM_ABI constexpr static move_backward_result<_InIter, _OutIter>
  44   __move_backward_impl(_InIter __first, _Sent __last, _OutIter __result) {
  45     auto __ret = std::__move_backward<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result));
  46     return {std::move(__ret.first), std::move(__ret.second)};
  47   }
  48
  49   template <bidirectional_iterator _InIter, sentinel_for<_InIter> _Sent, bidirectional_iterator _OutIter>
  50     requires indirectly_movable<_InIter, _OutIter>
  51   _LIBCPP_HIDE_FROM_ABI constexpr move_backward_result<_InIter, _OutIter>
  52   operator()(_InIter __first, _Sent __last, _OutIter __result) const {
  53     return __move_backward_impl(std::move(__first), std::move(__last), std::move(__result));
  54   }
  55
  56   template <bidirectional_range _Range, bidirectional_iterator _Iter>
  57     requires indirectly_movable<iterator_t<_Range>, _Iter>
  58   _LIBCPP_HIDE_FROM_ABI constexpr move_backward_result<borrowed_iterator_t<_Range>, _Iter>
  59   operator()(_Range&& __range, _Iter __result) const {
  60     return __move_backward_impl(ranges::begin(__range), ranges::end(__range), std::move(__result));
  61   }
  62 };
  63 } // namespace __move_backward
  64
  65 inline namespace __cpo {
  66 inline constexpr auto move_backward = __move_backward::__fn{};
  67 } // namespace __cpo
  68 } // namespace ranges
  69
  70 _LIBCPP_END_NAMESPACE_STD
  71
  72 #endif // _LIBCPP_STD_VER >= 20
  73
  74 _LIBCPP_POP_MACROS
  75
  76 #endif // _LIBCPP___ALGORITHM_RANGES_MOVE_BACKWARD_H