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71 lines
2.2 KiB
C++
71 lines
2.2 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_RANGES_ROTATE_H
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#define _LIBCPP___ALGORITHM_RANGES_ROTATE_H
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#include <__algorithm/iterator_operations.h>
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#include <__algorithm/ranges_iterator_concept.h>
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#include <__algorithm/rotate.h>
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#include <__config>
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#include <__iterator/concepts.h>
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#include <__iterator/iterator_traits.h>
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#include <__iterator/permutable.h>
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#include <__ranges/access.h>
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#include <__ranges/concepts.h>
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#include <__ranges/subrange.h>
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#include <__utility/move.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_PUSH_MACROS
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#include <__undef_macros>
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#if _LIBCPP_STD_VER >= 20
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_LIBCPP_BEGIN_NAMESPACE_STD
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namespace ranges {
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namespace __rotate {
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struct __fn {
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template <class _Iter, class _Sent>
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_LIBCPP_HIDE_FROM_ABI constexpr static subrange<_Iter> __rotate_fn_impl(_Iter __first, _Iter __middle, _Sent __last) {
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auto __ret = std::__rotate<_RangeAlgPolicy>(std::move(__first), std::move(__middle), std::move(__last));
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return {std::move(__ret.first), std::move(__ret.second)};
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}
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template <permutable _Iter, sentinel_for<_Iter> _Sent>
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_LIBCPP_HIDE_FROM_ABI constexpr subrange<_Iter> operator()(_Iter __first, _Iter __middle, _Sent __last) const {
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return __rotate_fn_impl(std::move(__first), std::move(__middle), std::move(__last));
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}
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template <forward_range _Range>
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requires permutable<iterator_t<_Range>>
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_LIBCPP_HIDE_FROM_ABI constexpr borrowed_subrange_t<_Range>
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operator()(_Range&& __range, iterator_t<_Range> __middle) const {
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return __rotate_fn_impl(ranges::begin(__range), std::move(__middle), ranges::end(__range));
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}
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};
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} // namespace __rotate
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inline namespace __cpo {
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inline constexpr auto rotate = __rotate::__fn{};
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} // namespace __cpo
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} // namespace ranges
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_POP_MACROS
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#endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_H
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