| //===----------------------------------------------------------------------===// |
| // |
| // 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_PSTL_ROTATE_COPY_H |
| #define _LIBCPP___ALGORITHM_PSTL_ROTATE_COPY_H |
| |
| #include <__algorithm/pstl_copy.h> |
| #include <__algorithm/pstl_frontend_dispatch.h> |
| #include <__iterator/cpp17_iterator_concepts.h> |
| #include <__pstl/configuration.h> |
| #include <__type_traits/is_execution_policy.h> |
| #include <optional> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_PUSH_MACROS |
| #include <__undef_macros> |
| |
| #if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| template <class> |
| void __pstl_rotate_copy(); |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _ForwardOutIterator, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| [[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator> |
| __rotate_copy(_ExecutionPolicy&& __policy, |
| _ForwardIterator&& __first, |
| _ForwardIterator&& __middle, |
| _ForwardIterator&& __last, |
| _ForwardOutIterator&& __result) noexcept { |
| return std::__pstl_frontend_dispatch( |
| _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_rotate_copy, _RawPolicy), |
| [&__policy](_ForwardIterator __g_first, |
| _ForwardIterator __g_middle, |
| _ForwardIterator __g_last, |
| _ForwardOutIterator __g_result) -> optional<_ForwardOutIterator> { |
| auto __result_mid = |
| std::__copy(__policy, _ForwardIterator(__g_middle), std::move(__g_last), std::move(__g_result)); |
| if (!__result_mid) |
| return nullopt; |
| return std::__copy(__policy, std::move(__g_first), std::move(__g_middle), *std::move(__result_mid)); |
| }, |
| std::move(__first), |
| std::move(__middle), |
| std::move(__last), |
| std::move(__result)); |
| } |
| |
| template <class _ExecutionPolicy, |
| class _ForwardIterator, |
| class _ForwardOutIterator, |
| class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, |
| enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> |
| _LIBCPP_HIDE_FROM_ABI _ForwardOutIterator rotate_copy( |
| _ExecutionPolicy&& __policy, |
| _ForwardIterator __first, |
| _ForwardIterator __middle, |
| _ForwardIterator __last, |
| _ForwardOutIterator __result) { |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardIterator, "rotate_copy requires ForwardIterators"); |
| _LIBCPP_REQUIRE_CPP17_FORWARD_ITERATOR(_ForwardOutIterator, "rotate_copy requires ForwardIterators"); |
| _LIBCPP_REQUIRE_CPP17_OUTPUT_ITERATOR( |
| _ForwardOutIterator, decltype(*__first), "rotate_copy requires an OutputIterator"); |
| auto __res = |
| std::__rotate_copy(__policy, std::move(__first), std::move(__middle), std::move(__last), std::move(__result)); |
| if (!__res) |
| std::__throw_bad_alloc(); |
| return *__res; |
| } |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 |
| |
| _LIBCPP_POP_MACROS |
| |
| #endif // _LIBCPP___ALGORITHM_PSTL_ROTATE_COPY_H |