ranges_move.h 2.4 KB

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  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. #ifndef _LIBCPP___ALGORITHM_RANGES_MOVE_H
  9. #define _LIBCPP___ALGORITHM_RANGES_MOVE_H
  10. #include <__algorithm/in_out_result.h>
  11. #include <__algorithm/iterator_operations.h>
  12. #include <__algorithm/move.h>
  13. #include <__config>
  14. #include <__iterator/concepts.h>
  15. #include <__ranges/access.h>
  16. #include <__ranges/concepts.h>
  17. #include <__ranges/dangling.h>
  18. #include <__utility/move.h>
  19. #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
  20. # pragma GCC system_header
  21. #endif
  22. _LIBCPP_PUSH_MACROS
  23. #include <__undef_macros>
  24. #if _LIBCPP_STD_VER >= 20
  25. _LIBCPP_BEGIN_NAMESPACE_STD
  26. namespace ranges {
  27. template <class _InIter, class _OutIter>
  28. using move_result = in_out_result<_InIter, _OutIter>;
  29. namespace __move {
  30. struct __fn {
  31. template <class _InIter, class _Sent, class _OutIter>
  32. _LIBCPP_HIDE_FROM_ABI constexpr static move_result<_InIter, _OutIter>
  33. __move_impl(_InIter __first, _Sent __last, _OutIter __result) {
  34. auto __ret = std::__move<_RangeAlgPolicy>(std::move(__first), std::move(__last), std::move(__result));
  35. return {std::move(__ret.first), std::move(__ret.second)};
  36. }
  37. template <input_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter>
  38. requires indirectly_movable<_InIter, _OutIter>
  39. _LIBCPP_HIDE_FROM_ABI constexpr move_result<_InIter, _OutIter>
  40. operator()(_InIter __first, _Sent __last, _OutIter __result) const {
  41. return __move_impl(std::move(__first), std::move(__last), std::move(__result));
  42. }
  43. template <input_range _Range, weakly_incrementable _OutIter>
  44. requires indirectly_movable<iterator_t<_Range>, _OutIter>
  45. _LIBCPP_HIDE_FROM_ABI constexpr move_result<borrowed_iterator_t<_Range>, _OutIter>
  46. operator()(_Range&& __range, _OutIter __result) const {
  47. return __move_impl(ranges::begin(__range), ranges::end(__range), std::move(__result));
  48. }
  49. };
  50. } // namespace __move
  51. inline namespace __cpo {
  52. inline constexpr auto move = __move::__fn{};
  53. } // namespace __cpo
  54. } // namespace ranges
  55. _LIBCPP_END_NAMESPACE_STD
  56. #endif // _LIBCPP_STD_VER >= 20
  57. _LIBCPP_POP_MACROS
  58. #endif // _LIBCPP___ALGORITHM_RANGES_MOVE_H