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/move.h> 14 #include <__config> 15 #include <__iterator/concepts.h> 16 #include <__iterator/iter_move.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 > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 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 38 template <class _InIter, class _Sent, class _OutIter> 39 requires __iter_move::__move_deref<_InIter> // check that we are allowed to std::move() the value 40 _LIBCPP_HIDE_FROM_ABI constexpr static 41 move_result<_InIter, _OutIter> __move_impl(_InIter __first, _Sent __last, _OutIter __result) { 42 auto __ret = std::__move(std::move(__first), std::move(__last), std::move(__result)); 43 return {std::move(__ret.first), std::move(__ret.second)}; 44 } 45 46 template <class _InIter, class _Sent, class _OutIter> 47 _LIBCPP_HIDE_FROM_ABI constexpr static 48 move_result<_InIter, _OutIter> __move_impl(_InIter __first, _Sent __last, _OutIter __result) { 49 while (__first != __last) { 50 *__result = ranges::iter_move(__first); 51 ++__first; 52 ++__result; 53 } 54 return {std::move(__first), std::move(__result)}; 55 } 56 57 template <input_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter> 58 requires indirectly_movable<_InIter, _OutIter> 59 _LIBCPP_HIDE_FROM_ABI constexpr 60 move_result<_InIter, _OutIter> operator()(_InIter __first, _Sent __last, _OutIter __result) const { 61 return __move_impl(std::move(__first), std::move(__last), std::move(__result)); 62 } 63 64 template <input_range _Range, weakly_incrementable _OutIter> 65 requires indirectly_movable<iterator_t<_Range>, _OutIter> 66 _LIBCPP_HIDE_FROM_ABI constexpr 67 move_result<borrowed_iterator_t<_Range>, _OutIter> operator()(_Range&& __range, _OutIter __result) const { 68 return __move_impl(ranges::begin(__range), ranges::end(__range), std::move(__result)); 69 } 70 71 }; 72 } // namespace __move 73 74 inline namespace __cpo { 75 inline constexpr auto move = __move::__fn{}; 76 } // namespace __cpo 77 } // namespace ranges 78 79 _LIBCPP_END_NAMESPACE_STD 80 81 #endif // _LIBCPP_STD_VER > 17 && !defined(_LIBCPP_HAS_NO_INCOMPLETE_RANGES) 82 83 #endif // _LIBCPP___ALGORITHM_RANGES_MOVE_H 84