libcxx/include/__algorithm/ranges_move.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_H
  10 #define _LIBCPP___ALGORITHM_RANGES_MOVE_H
  11
  12 #include <__algorithm/in_out_result.h>
  13 #include <__algorithm/iterator_operations.h>
  14 #include <__algorithm/move.h>
  15 #include <__config>
  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
  22 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  23 #  pragma GCC system_header
  24 #endif
  25
  26 _LIBCPP_PUSH_MACROS
  27 #include <__undef_macros>
  28
  29 #if _LIBCPP_STD_VER >= 20
  30
  31 _LIBCPP_BEGIN_NAMESPACE_STD
  32
  33 namespace ranges {
  34
  35 template <class _InIter, class _OutIter>
  36 using move_result = in_out_result<_InIter, _OutIter>;
  37
  38 struct __move {
  39   template <class _InIter, class _Sent, class _OutIter>
  40   _LIBCPP_HIDE_FROM_ABI constexpr static move_result<_InIter, _OutIter>
  41   __move_impl(_InIter __first, _Sent __last, _OutIter __result) {
  42     auto __ret = std::__move<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result));
  43     return {std::move(__ret.first), std::move(__ret.second)};
  44   }
  45
  46   template <input_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter>
  47     requires indirectly_movable<_InIter, _OutIter>
  48   _LIBCPP_HIDE_FROM_ABI constexpr move_result<_InIter, _OutIter>
  49   operator()(_InIter __first, _Sent __last, _OutIter __result) const {
  50     return __move_impl(std::move(__first), std::move(__last), std::move(__result));
  51   }
  52
  53   template <input_range _Range, weakly_incrementable _OutIter>
  54     requires indirectly_movable<iterator_t<_Range>, _OutIter>
  55   _LIBCPP_HIDE_FROM_ABI constexpr move_result<borrowed_iterator_t<_Range>, _OutIter>
  56   operator()(_Range&& __range, _OutIter __result) const {
  57     return __move_impl(ranges::begin(__range), ranges::end(__range), std::move(__result));
  58   }
  59 };
  60
  61 inline namespace __cpo {
  62 inline constexpr auto move = __move{};
  63 } // namespace __cpo
  64 } // namespace ranges
  65
  66 _LIBCPP_END_NAMESPACE_STD
  67
  68 #endif // _LIBCPP_STD_VER >= 20
  69
  70 _LIBCPP_POP_MACROS
  71
  72 #endif // _LIBCPP___ALGORITHM_RANGES_MOVE_H