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//===----------------------------------------------------------------------===//
//
// 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
_LIBCPP_PUSH_MACROS
#include <__undef_macros>
#if _LIBCPP_STD_VER >= 20
_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 >= 20
_LIBCPP_POP_MACROS
#endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_H
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