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 #if _LIBCPP_STD_VER >= 20
  27
  28 _LIBCPP_BEGIN_NAMESPACE_STD
  29
  30 namespace ranges {
  31
  32 template <class _InIter, class _OutIter>
  33 using move_result = in_out_result<_InIter, _OutIter>;
  34
  35 namespace __move {
  36 struct __fn {
  37   template <class _InIter, class _Sent, class _OutIter>
  38   _LIBCPP_HIDE_FROM_ABI constexpr static move_result<_InIter, _OutIter>
  39   __move_impl(_InIter __first, _Sent __last, _OutIter __result) {
  40     auto __ret = std::__move<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result));
  41     return {std::move(__ret.first), std::move(__ret.second)};
  42   }
  43
  44   template <input_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter>
  45     requires indirectly_movable<_InIter, _OutIter>
  46   _LIBCPP_HIDE_FROM_ABI constexpr move_result<_InIter, _OutIter>
  47   operator()(_InIter __first, _Sent __last, _OutIter __result) const {
  48     return __move_impl(std::move(__first), std::move(__last), std::move(__result));
  49   }
  50
  51   template <input_range _Range, weakly_incrementable _OutIter>
  52     requires indirectly_movable<iterator_t<_Range>, _OutIter>
  53   _LIBCPP_HIDE_FROM_ABI constexpr move_result<borrowed_iterator_t<_Range>, _OutIter>
  54   operator()(_Range&& __range, _OutIter __result) const {
  55     return __move_impl(ranges::begin(__range), ranges::end(__range), std::move(__result));
  56   }
  57 };
  58 } // namespace __move
  59
  60 inline namespace __cpo {
  61 inline constexpr auto move = __move::__fn{};
  62 } // namespace __cpo
  63 } // namespace ranges
  64
  65 _LIBCPP_END_NAMESPACE_STD
  66
  67 #endif // _LIBCPP_STD_VER >= 20
  68
  69 #endif // _LIBCPP___ALGORITHM_RANGES_MOVE_H