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| 1 | //===----------------------------------------------------------------------===// |
|---|---|
| 2 | // |
| 3 | // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| 4 | // See https://llvm.org/LICENSE.txt for license information. |
| 5 | // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| 6 | // |
| 7 | //===----------------------------------------------------------------------===// |
| 8 | |
| 9 | #ifndef _LIBCPP___ALGORITHM_RANGES_ROTATE_COPY_H |
| 10 | #define _LIBCPP___ALGORITHM_RANGES_ROTATE_COPY_H |
| 11 | |
| 12 | #include <__algorithm/in_out_result.h> |
| 13 | #include <__algorithm/ranges_copy.h> |
| 14 | #include <__config> |
| 15 | #include <__iterator/concepts.h> |
| 16 | #include <__ranges/access.h> |
| 17 | #include <__ranges/concepts.h> |
| 18 | #include <__ranges/dangling.h> |
| 19 | #include <__utility/move.h> |
| 20 | |
| 21 | #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| 22 | # pragma GCC system_header |
| 23 | #endif |
| 24 | |
| 25 | _LIBCPP_PUSH_MACROS |
| 26 | #include <__undef_macros> |
| 27 | |
| 28 | #if _LIBCPP_STD_VER >= 20 |
| 29 | |
| 30 | _LIBCPP_BEGIN_NAMESPACE_STD |
| 31 | |
| 32 | namespace ranges { |
| 33 | |
| 34 | template <class _InIter, class _OutIter> |
| 35 | using rotate_copy_result = in_out_result<_InIter, _OutIter>; |
| 36 | |
| 37 | struct __rotate_copy { |
| 38 | template <forward_iterator _InIter, sentinel_for<_InIter> _Sent, weakly_incrementable _OutIter> |
| 39 | requires indirectly_copyable<_InIter, _OutIter> |
| 40 | _LIBCPP_HIDE_FROM_ABI constexpr rotate_copy_result<_InIter, _OutIter> |
| 41 | operator()(_InIter __first, _InIter __middle, _Sent __last, _OutIter __result) const { |
| 42 | auto __res1 = ranges::copy(__middle, __last, std::move(__result)); |
| 43 | auto __res2 = ranges::copy(__first, __middle, std::move(__res1.out)); |
| 44 | return {std::move(__res1.in), std::move(__res2.out)}; |
| 45 | } |
| 46 | |
| 47 | template <forward_range _Range, weakly_incrementable _OutIter> |
| 48 | requires indirectly_copyable<iterator_t<_Range>, _OutIter> |
| 49 | _LIBCPP_HIDE_FROM_ABI constexpr rotate_copy_result<borrowed_iterator_t<_Range>, _OutIter> |
| 50 | operator()(_Range&& __range, iterator_t<_Range> __middle, _OutIter __result) const { |
| 51 | return (*this)(ranges::begin(__range), std::move(__middle), ranges::end(__range), std::move(__result)); |
| 52 | } |
| 53 | }; |
| 54 | |
| 55 | inline namespace __cpo { |
| 56 | inline constexpr auto rotate_copy = __rotate_copy{}; |
| 57 | } // namespace __cpo |
| 58 | } // namespace ranges |
| 59 | |
| 60 | _LIBCPP_END_NAMESPACE_STD |
| 61 | |
| 62 | #endif // _LIBCPP_STD_VER >= 20 |
| 63 | |
| 64 | _LIBCPP_POP_MACROS |
| 65 | |
| 66 | #endif // _LIBCPP___ALGORITHM_RANGES_ROTATE_COPY_H |
| 67 |
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