161cfbce3SDimitry Andric //===----------------------------------------------------------------------===// 261cfbce3SDimitry Andric // 361cfbce3SDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 461cfbce3SDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 561cfbce3SDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 661cfbce3SDimitry Andric // 761cfbce3SDimitry Andric //===----------------------------------------------------------------------===// 861cfbce3SDimitry Andric 961cfbce3SDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_ROTATE_H 1061cfbce3SDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_ROTATE_H 1161cfbce3SDimitry Andric 1261cfbce3SDimitry Andric #include <__algorithm/iterator_operations.h> 1361cfbce3SDimitry Andric #include <__algorithm/ranges_iterator_concept.h> 1461cfbce3SDimitry Andric #include <__algorithm/rotate.h> 1561cfbce3SDimitry Andric #include <__config> 1661cfbce3SDimitry Andric #include <__iterator/concepts.h> 1761cfbce3SDimitry Andric #include <__iterator/iterator_traits.h> 1861cfbce3SDimitry Andric #include <__iterator/permutable.h> 1961cfbce3SDimitry Andric #include <__ranges/access.h> 2061cfbce3SDimitry Andric #include <__ranges/concepts.h> 2161cfbce3SDimitry Andric #include <__ranges/subrange.h> 2261cfbce3SDimitry Andric #include <__utility/move.h> 2361cfbce3SDimitry Andric 2461cfbce3SDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 2561cfbce3SDimitry Andric # pragma GCC system_header 2661cfbce3SDimitry Andric #endif 2761cfbce3SDimitry Andric 28*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 29*b3edf446SDimitry Andric #include <__undef_macros> 30*b3edf446SDimitry Andric 3106c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 3261cfbce3SDimitry Andric 3361cfbce3SDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 3461cfbce3SDimitry Andric 3561cfbce3SDimitry Andric namespace ranges { 3661cfbce3SDimitry Andric namespace __rotate { 3761cfbce3SDimitry Andric 3861cfbce3SDimitry Andric struct __fn { 3961cfbce3SDimitry Andric template <class _Iter, class _Sent> __rotate_fn_impl__fn4006c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr static subrange<_Iter> __rotate_fn_impl(_Iter __first, _Iter __middle, _Sent __last) { 4106c3fb27SDimitry Andric auto __ret = std::__rotate<_RangeAlgPolicy>(std::move(__first), std::move(__middle), std::move(__last)); 4261cfbce3SDimitry Andric return {std::move(__ret.first), std::move(__ret.second)}; 4361cfbce3SDimitry Andric } 4461cfbce3SDimitry Andric 4561cfbce3SDimitry Andric template <permutable _Iter, sentinel_for<_Iter> _Sent> operator__fn4606c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter> operator()(_Iter __first, _Iter __middle, _Sent __last) const { 4761cfbce3SDimitry Andric return __rotate_fn_impl(std::move(__first), std::move(__middle), std::move(__last)); 4861cfbce3SDimitry Andric } 4961cfbce3SDimitry Andric 5061cfbce3SDimitry Andric template <forward_range _Range> 5161cfbce3SDimitry Andric requires permutable<iterator_t<_Range>> 5206c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range> operator__fn5306c3fb27SDimitry Andric operator()(_Range&& __range, iterator_t<_Range> __middle) const { 5461cfbce3SDimitry Andric return __rotate_fn_impl(ranges::begin(__range), std::move(__middle), ranges::end(__range)); 5561cfbce3SDimitry Andric } 5661cfbce3SDimitry Andric }; 5761cfbce3SDimitry Andric 5861cfbce3SDimitry Andric } // namespace __rotate 5961cfbce3SDimitry Andric 6061cfbce3SDimitry Andric inline namespace __cpo { 6161cfbce3SDimitry Andric inline constexpr auto rotate = __rotate::__fn{}; 6261cfbce3SDimitry Andric } // namespace __cpo 6361cfbce3SDimitry Andric } // namespace ranges 6461cfbce3SDimitry Andric 6561cfbce3SDimitry Andric _LIBCPP_END_NAMESPACE_STD 6661cfbce3SDimitry Andric 6706c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 6861cfbce3SDimitry Andric 69*b3edf446SDimitry Andric _LIBCPP_POP_MACROS 70*b3edf446SDimitry Andric 7161cfbce3SDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_H 72