1*4bdff4beSrobert //===----------------------------------------------------------------------===// 2*4bdff4beSrobert // 3*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 5*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*4bdff4beSrobert // 7*4bdff4beSrobert //===----------------------------------------------------------------------===// 8*4bdff4beSrobert 9*4bdff4beSrobert #ifndef _LIBCPP___ALGORITHM_RANGES_ROTATE_H 10*4bdff4beSrobert #define _LIBCPP___ALGORITHM_RANGES_ROTATE_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__algorithm/iterator_operations.h> 13*4bdff4beSrobert #include <__algorithm/ranges_iterator_concept.h> 14*4bdff4beSrobert #include <__algorithm/rotate.h> 15*4bdff4beSrobert #include <__config> 16*4bdff4beSrobert #include <__iterator/concepts.h> 17*4bdff4beSrobert #include <__iterator/iterator_traits.h> 18*4bdff4beSrobert #include <__iterator/permutable.h> 19*4bdff4beSrobert #include <__ranges/access.h> 20*4bdff4beSrobert #include <__ranges/concepts.h> 21*4bdff4beSrobert #include <__ranges/subrange.h> 22*4bdff4beSrobert #include <__utility/move.h> 23*4bdff4beSrobert 24*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 25*4bdff4beSrobert # pragma GCC system_header 26*4bdff4beSrobert #endif 27*4bdff4beSrobert 28*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 29*4bdff4beSrobert 30*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 31*4bdff4beSrobert 32*4bdff4beSrobert namespace ranges { 33*4bdff4beSrobert namespace __rotate { 34*4bdff4beSrobert 35*4bdff4beSrobert struct __fn { 36*4bdff4beSrobert 37*4bdff4beSrobert template <class _Iter, class _Sent> 38*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr __rotate_fn_impl__fn39*4bdff4beSrobert static subrange<_Iter> __rotate_fn_impl(_Iter __first, _Iter __middle, _Sent __last) { 40*4bdff4beSrobert auto __ret = std::__rotate<_RangeAlgPolicy>( 41*4bdff4beSrobert std::move(__first), std::move(__middle), std::move(__last)); 42*4bdff4beSrobert return {std::move(__ret.first), std::move(__ret.second)}; 43*4bdff4beSrobert } 44*4bdff4beSrobert 45*4bdff4beSrobert template <permutable _Iter, sentinel_for<_Iter> _Sent> 46*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr operator__fn47*4bdff4beSrobert subrange<_Iter> operator()(_Iter __first, _Iter __middle, _Sent __last) const { 48*4bdff4beSrobert return __rotate_fn_impl(std::move(__first), std::move(__middle), std::move(__last)); 49*4bdff4beSrobert } 50*4bdff4beSrobert 51*4bdff4beSrobert template <forward_range _Range> 52*4bdff4beSrobert requires permutable<iterator_t<_Range>> 53*4bdff4beSrobert _LIBCPP_HIDE_FROM_ABI constexpr operator__fn54*4bdff4beSrobert borrowed_subrange_t<_Range> operator()(_Range&& __range, iterator_t<_Range> __middle) const { 55*4bdff4beSrobert return __rotate_fn_impl(ranges::begin(__range), std::move(__middle), ranges::end(__range)); 56*4bdff4beSrobert } 57*4bdff4beSrobert 58*4bdff4beSrobert }; 59*4bdff4beSrobert 60*4bdff4beSrobert } // namespace __rotate 61*4bdff4beSrobert 62*4bdff4beSrobert inline namespace __cpo { 63*4bdff4beSrobert inline constexpr auto rotate = __rotate::__fn{}; 64*4bdff4beSrobert } // namespace __cpo 65*4bdff4beSrobert } // namespace ranges 66*4bdff4beSrobert 67*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 68*4bdff4beSrobert 69*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 70*4bdff4beSrobert 71*4bdff4beSrobert #endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_H 72