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_PSTL_ROTATE_COPY_H 10#define _LIBCPP___ALGORITHM_PSTL_ROTATE_COPY_H 11 12#include <__algorithm/pstl_backend.h> 13#include <__algorithm/pstl_copy.h> 14#include <__algorithm/pstl_frontend_dispatch.h> 15#include <__type_traits/is_execution_policy.h> 16#include <optional> 17 18#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19# pragma GCC system_header 20#endif 21 22_LIBCPP_PUSH_MACROS 23#include <__undef_macros> 24 25#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 26 27_LIBCPP_BEGIN_NAMESPACE_STD 28 29template <class> 30void __pstl_rotate_copy(); 31 32template <class _ExecutionPolicy, 33 class _ForwardIterator, 34 class _ForwardOutIterator, 35 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, 36 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> 37[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator> 38__rotate_copy(_ExecutionPolicy&& __policy, 39 _ForwardIterator&& __first, 40 _ForwardIterator&& __middle, 41 _ForwardIterator&& __last, 42 _ForwardOutIterator&& __result) noexcept { 43 return std::__pstl_frontend_dispatch( 44 _LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_rotate_copy, _RawPolicy), 45 [&__policy](_ForwardIterator __g_first, 46 _ForwardIterator __g_middle, 47 _ForwardIterator __g_last, 48 _ForwardOutIterator __g_result) -> optional<_ForwardOutIterator> { 49 auto __result_mid = 50 std::__copy(__policy, _ForwardIterator(__g_middle), std::move(__g_last), std::move(__g_result)); 51 if (!__result_mid) 52 return nullopt; 53 return std::__copy(__policy, std::move(__g_first), std::move(__g_middle), *std::move(__result_mid)); 54 }, 55 std::move(__first), 56 std::move(__middle), 57 std::move(__last), 58 std::move(__result)); 59} 60 61template <class _ExecutionPolicy, 62 class _ForwardIterator, 63 class _ForwardOutIterator, 64 class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>, 65 enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0> 66_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator rotate_copy( 67 _ExecutionPolicy&& __policy, 68 _ForwardIterator __first, 69 _ForwardIterator __middle, 70 _ForwardIterator __last, 71 _ForwardOutIterator __result) { 72 auto __res = 73 std::__rotate_copy(__policy, std::move(__first), std::move(__middle), std::move(__last), std::move(__result)); 74 if (!__res) 75 std::__throw_bad_alloc(); 76 return *__res; 77} 78 79_LIBCPP_END_NAMESPACE_STD 80 81#endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17 82 83_LIBCPP_POP_MACROS 84 85#endif // _LIBCPP___ALGORITHM_PSTL_ROTATE_COPY_H 86