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 <__algorithm/in_out_result.h> 13 #include <__algorithm/iterator_operations.h> 14 #include <__algorithm/move_backward.h> 15 #include <__config> 16 #include <__iterator/concepts.h> 17 #include <__iterator/iter_move.h> 18 #include <__iterator/next.h> 19 #include <__ranges/access.h> 20 #include <__ranges/concepts.h> 21 #include <__ranges/dangling.h> 22 #include <__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 <__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 77