69 lines · c
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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___ALGORITHM_RANGES_REVERSE_COPY_H10#define _LIBCPP___ALGORITHM_RANGES_REVERSE_COPY_H11 12#include <__algorithm/in_out_result.h>13#include <__algorithm/ranges_copy.h>14#include <__config>15#include <__iterator/concepts.h>16#include <__iterator/next.h>17#include <__iterator/reverse_iterator.h>18#include <__ranges/access.h>19#include <__ranges/concepts.h>20#include <__ranges/dangling.h>21#include <__ranges/subrange.h>22#include <__utility/move.h>23 24#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)25# pragma GCC system_header26#endif27 28_LIBCPP_PUSH_MACROS29#include <__undef_macros>30 31#if _LIBCPP_STD_VER >= 2032 33_LIBCPP_BEGIN_NAMESPACE_STD34 35namespace ranges {36 37template <class _InIter, class _OutIter>38using reverse_copy_result = in_out_result<_InIter, _OutIter>;39 40struct __reverse_copy {41 template <bidirectional_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter>42 requires indirectly_copyable<_InIter, _OutIter>43 _LIBCPP_HIDE_FROM_ABI constexpr reverse_copy_result<_InIter, _OutIter>44 operator()(_InIter __first, _Sent __last, _OutIter __result) const {45 return (*this)(subrange(std::move(__first), std::move(__last)), std::move(__result));46 }47 48 template <bidirectional_range _Range, weakly_incrementable _OutIter>49 requires indirectly_copyable<iterator_t<_Range>, _OutIter>50 _LIBCPP_HIDE_FROM_ABI constexpr reverse_copy_result<borrowed_iterator_t<_Range>, _OutIter>51 operator()(_Range&& __range, _OutIter __result) const {52 auto __ret = ranges::copy(std::__reverse_range(__range), std::move(__result));53 return {ranges::next(ranges::begin(__range), ranges::end(__range)), std::move(__ret.out)};54 }55};56 57inline namespace __cpo {58inline constexpr auto reverse_copy = __reverse_copy{};59} // namespace __cpo60} // namespace ranges61 62_LIBCPP_END_NAMESPACE_STD63 64#endif // _LIBCPP_STD_VER >= 2065 66_LIBCPP_POP_MACROS67 68#endif // _LIBCPP___ALGORITHM_RANGES_REVERSE_COPY_H69