1753f127fSDimitry Andric //===----------------------------------------------------------------------===// 2753f127fSDimitry Andric // 3753f127fSDimitry Andric // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4753f127fSDimitry Andric // See https://llvm.org/LICENSE.txt for license information. 5753f127fSDimitry Andric // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6753f127fSDimitry Andric // 7753f127fSDimitry Andric //===----------------------------------------------------------------------===// 8753f127fSDimitry Andric 9753f127fSDimitry Andric #ifndef _LIBCPP___ALGORITHM_RANGES_ROTATE_COPY_H 10753f127fSDimitry Andric #define _LIBCPP___ALGORITHM_RANGES_ROTATE_COPY_H 11753f127fSDimitry Andric 12753f127fSDimitry Andric #include <__algorithm/in_out_result.h> 13753f127fSDimitry Andric #include <__algorithm/ranges_copy.h> 14753f127fSDimitry Andric #include <__config> 15753f127fSDimitry Andric #include <__iterator/concepts.h> 16753f127fSDimitry Andric #include <__ranges/access.h> 17753f127fSDimitry Andric #include <__ranges/concepts.h> 18753f127fSDimitry Andric #include <__ranges/dangling.h> 19753f127fSDimitry Andric #include <__utility/move.h> 20753f127fSDimitry Andric 21753f127fSDimitry Andric #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 22753f127fSDimitry Andric # pragma GCC system_header 23753f127fSDimitry Andric #endif 24753f127fSDimitry Andric 25*b3edf446SDimitry Andric _LIBCPP_PUSH_MACROS 26*b3edf446SDimitry Andric #include <__undef_macros> 27*b3edf446SDimitry Andric 2806c3fb27SDimitry Andric #if _LIBCPP_STD_VER >= 20 29753f127fSDimitry Andric 30753f127fSDimitry Andric _LIBCPP_BEGIN_NAMESPACE_STD 31753f127fSDimitry Andric 32753f127fSDimitry Andric namespace ranges { 33753f127fSDimitry Andric 34753f127fSDimitry Andric template <class _InIter, class _OutIter> 35753f127fSDimitry Andric using rotate_copy_result = in_out_result<_InIter, _OutIter>; 36753f127fSDimitry Andric 37753f127fSDimitry Andric namespace __rotate_copy { 38753f127fSDimitry Andric struct __fn { 395f757f3fSDimitry Andric template <forward_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter> 40753f127fSDimitry Andric requires indirectly_copyable<_InIter, _OutIter> 4106c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr rotate_copy_result<_InIter, _OutIter> operator__fn42753f127fSDimitry Andric operator()(_InIter __first, _InIter __middle, _Sent __last, _OutIter __result) const { 43753f127fSDimitry Andric auto __res1 = ranges::copy(__middle, __last, std::move(__result)); 44753f127fSDimitry Andric auto __res2 = ranges::copy(__first, __middle, std::move(__res1.out)); 45753f127fSDimitry Andric return {std::move(__res1.in), std::move(__res2.out)}; 46753f127fSDimitry Andric } 47753f127fSDimitry Andric 485f757f3fSDimitry Andric template <forward_range _Range, weakly_incrementable _OutIter> 49753f127fSDimitry Andric requires indirectly_copyable<iterator_t<_Range>, _OutIter> 5006c3fb27SDimitry Andric _LIBCPP_HIDE_FROM_ABI constexpr rotate_copy_result<borrowed_iterator_t<_Range>, _OutIter> operator__fn51753f127fSDimitry Andric operator()(_Range&& __range, iterator_t<_Range> __middle, _OutIter __result) const { 52753f127fSDimitry Andric return (*this)(ranges::begin(__range), std::move(__middle), ranges::end(__range), std::move(__result)); 53753f127fSDimitry Andric } 54753f127fSDimitry Andric }; 55753f127fSDimitry Andric } // namespace __rotate_copy 56753f127fSDimitry Andric 57753f127fSDimitry Andric inline namespace __cpo { 58753f127fSDimitry Andric inline constexpr auto rotate_copy = __rotate_copy::__fn{}; 59753f127fSDimitry Andric } // namespace __cpo 60753f127fSDimitry Andric } // namespace ranges 61753f127fSDimitry Andric 62753f127fSDimitry Andric _LIBCPP_END_NAMESPACE_STD 63753f127fSDimitry Andric 6406c3fb27SDimitry Andric #endif // _LIBCPP_STD_VER >= 20 65753f127fSDimitry Andric 66*b3edf446SDimitry Andric _LIBCPP_POP_MACROS 67*b3edf446SDimitry Andric 68753f127fSDimitry Andric #endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_COPY_H 69