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ea2206d70d
Basically a rebase of D104980; most of that patch had already happened via gradual drive-by changes, but this finishes it up. Don't touch the inclusions from `<__functional_base>`, `<__hash_table>`, or `<__locale>`; those could be removed if we propagated the inclusions up to the includers of those files, but there are lots of those includers. `<algorithm>`, `<functional>`, and `<memory>` already include `<utility>` at the top level. `<iterator>` did not, so I've added it there. Differential Revision: https://reviews.llvm.org/D119020
78 lines
2.4 KiB
C++
78 lines
2.4 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_MOVE_H
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#define _LIBCPP___ALGORITHM_MOVE_H
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#include <__algorithm/unwrap_iter.h>
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#include <__config>
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#include <__utility/move.h>
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#include <cstring>
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#include <type_traits>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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// move
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template <class _InputIterator, class _OutputIterator>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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_OutputIterator
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__move_constexpr(_InputIterator __first, _InputIterator __last, _OutputIterator __result)
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{
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for (; __first != __last; ++__first, (void) ++__result)
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*__result = _VSTD::move(*__first);
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return __result;
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}
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template <class _InputIterator, class _OutputIterator>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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_OutputIterator
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__move(_InputIterator __first, _InputIterator __last, _OutputIterator __result)
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{
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return _VSTD::__move_constexpr(__first, __last, __result);
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}
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template <class _Tp, class _Up>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX14
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typename enable_if
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<
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is_same<typename remove_const<_Tp>::type, _Up>::value &&
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is_trivially_move_assignable<_Up>::value,
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_Up*
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>::type
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__move(_Tp* __first, _Tp* __last, _Up* __result)
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{
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const size_t __n = static_cast<size_t>(__last - __first);
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if (__n > 0)
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_VSTD::memmove(__result, __first, __n * sizeof(_Up));
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return __result + __n;
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}
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template <class _InputIterator, class _OutputIterator>
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inline _LIBCPP_INLINE_VISIBILITY _LIBCPP_CONSTEXPR_AFTER_CXX17
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_OutputIterator
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move(_InputIterator __first, _InputIterator __last, _OutputIterator __result)
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{
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if (__libcpp_is_constant_evaluated()) {
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return _VSTD::__move_constexpr(__first, __last, __result);
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} else {
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return _VSTD::__rewrap_iter(__result,
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_VSTD::__move(_VSTD::__unwrap_iter(__first),
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_VSTD::__unwrap_iter(__last),
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_VSTD::__unwrap_iter(__result)));
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}
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___ALGORITHM_MOVE_H
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