| //===----------------------------------------------------------------------===// |
| // |
| // 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_RANGES_ROTATE_H |
| #define _LIBCPP___ALGORITHM_RANGES_ROTATE_H |
| |
| #include <__algorithm/iterator_operations.h> |
| #include <__algorithm/ranges_iterator_concept.h> |
| #include <__algorithm/rotate.h> |
| #include <__config> |
| #include <__iterator/concepts.h> |
| #include <__iterator/iterator_traits.h> |
| #include <__iterator/permutable.h> |
| #include <__ranges/access.h> |
| #include <__ranges/concepts.h> |
| #include <__ranges/subrange.h> |
| #include <__utility/move.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| #if _LIBCPP_STD_VER > 17 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| namespace ranges { |
| namespace __rotate { |
| |
| struct __fn { |
| |
| template <class _Iter, class _Sent> |
| _LIBCPP_HIDE_FROM_ABI constexpr |
| static subrange<_Iter> __rotate_fn_impl(_Iter __first, _Iter __middle, _Sent __last) { |
| auto __ret = std::__rotate<_RangeAlgPolicy>( |
| std::move(__first), std::move(__middle), std::move(__last)); |
| return {std::move(__ret.first), std::move(__ret.second)}; |
| } |
| |
| template <permutable _Iter, sentinel_for<_Iter> _Sent> |
| _LIBCPP_HIDE_FROM_ABI constexpr |
| subrange<_Iter> operator()(_Iter __first, _Iter __middle, _Sent __last) const { |
| return __rotate_fn_impl(std::move(__first), std::move(__middle), std::move(__last)); |
| } |
| |
| template <forward_range _Range> |
| requires permutable<iterator_t<_Range>> |
| _LIBCPP_HIDE_FROM_ABI constexpr |
| borrowed_subrange_t<_Range> operator()(_Range&& __range, iterator_t<_Range> __middle) const { |
| return __rotate_fn_impl(ranges::begin(__range), std::move(__middle), ranges::end(__range)); |
| } |
| |
| }; |
| |
| } // namespace __rotate |
| |
| inline namespace __cpo { |
| inline constexpr auto rotate = __rotate::__fn{}; |
| } // namespace __cpo |
| } // namespace ranges |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP_STD_VER > 17 |
| |
| #endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_H |
