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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_ROTATE_H10#define _LIBCPP___ALGORITHM_RANGES_ROTATE_H11 12#include <__algorithm/iterator_operations.h>13#include <__algorithm/ranges_iterator_concept.h>14#include <__algorithm/rotate.h>15#include <__config>16#include <__iterator/concepts.h>17#include <__iterator/iterator_traits.h>18#include <__iterator/permutable.h>19#include <__ranges/access.h>20#include <__ranges/concepts.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 {36struct __rotate {37 template <class _Iter, class _Sent>38 _LIBCPP_HIDE_FROM_ABI constexpr static subrange<_Iter> __rotate_fn_impl(_Iter __first, _Iter __middle, _Sent __last) {39 auto __ret = std::__rotate<_RangeAlgPolicy>(std::move(__first), std::move(__middle), std::move(__last));40 return {std::move(__ret.first), std::move(__ret.second)};41 }42 43 template <permutable _Iter, sentinel_for<_Iter> _Sent>44 _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter> operator()(_Iter __first, _Iter __middle, _Sent __last) const {45 return __rotate_fn_impl(std::move(__first), std::move(__middle), std::move(__last));46 }47 48 template <forward_range _Range>49 requires permutable<iterator_t<_Range>>50 _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range>51 operator()(_Range&& __range, iterator_t<_Range> __middle) const {52 return __rotate_fn_impl(ranges::begin(__range), std::move(__middle), ranges::end(__range));53 }54};55 56inline namespace __cpo {57inline constexpr auto rotate = __rotate{};58} // namespace __cpo59} // namespace ranges60 61_LIBCPP_END_NAMESPACE_STD62 63#endif // _LIBCPP_STD_VER >= 2064 65_LIBCPP_POP_MACROS66 67#endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_H68