| //===----------------------------------------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef _LIBCPP___ALGORITHM_MOVE_H |
| #define _LIBCPP___ALGORITHM_MOVE_H |
| |
| #include <__algorithm/copy_move_common.h> |
| #include <__algorithm/iterator_operations.h> |
| #include <__config> |
| #include <__type_traits/is_copy_constructible.h> |
| #include <__utility/move.h> |
| #include <__utility/pair.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class _AlgPolicy> |
| struct __move_loop { |
| template <class _InIter, class _Sent, class _OutIter> |
| _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_InIter, _OutIter> |
| operator()(_InIter __first, _Sent __last, _OutIter __result) const { |
| while (__first != __last) { |
| *__result = _IterOps<_AlgPolicy>::__iter_move(__first); |
| ++__first; |
| ++__result; |
| } |
| return std::make_pair(std::move(__first), std::move(__result)); |
| } |
| }; |
| |
| struct __move_trivial { |
| // At this point, the iterators have been unwrapped so any `contiguous_iterator` has been unwrapped to a pointer. |
| template <class _In, class _Out, |
| __enable_if_t<__can_lower_move_assignment_to_memmove<_In, _Out>::value, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 pair<_In*, _Out*> |
| operator()(_In* __first, _In* __last, _Out* __result) const { |
| return std::__copy_trivial_impl(__first, __last, __result); |
| } |
| }; |
| |
| template <class _AlgPolicy, class _InIter, class _Sent, class _OutIter> |
| inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX14 |
| pair<_InIter, _OutIter> |
| __move(_InIter __first, _Sent __last, _OutIter __result) { |
| return std::__dispatch_copy_or_move<_AlgPolicy, __move_loop<_AlgPolicy>, __move_trivial>( |
| std::move(__first), std::move(__last), std::move(__result)); |
| } |
| |
| template <class _InputIterator, class _OutputIterator> |
| inline _LIBCPP_HIDE_FROM_ABI _LIBCPP_CONSTEXPR_SINCE_CXX20 |
| _OutputIterator move(_InputIterator __first, _InputIterator __last, _OutputIterator __result) { |
| static_assert(is_copy_constructible<_InputIterator>::value, "Iterators has to be copy constructible."); |
| static_assert(is_copy_constructible<_OutputIterator>::value, "The output iterator has to be copy constructible."); |
| |
| return std::__move<_ClassicAlgPolicy>( |
| std::move(__first), std::move(__last), std::move(__result)).second; |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___ALGORITHM_MOVE_H |