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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_PSTL_ROTATE_COPY_H
#define _LIBCPP___ALGORITHM_PSTL_ROTATE_COPY_H
#include <__algorithm/pstl_backend.h>
#include <__algorithm/pstl_copy.h>
#include <__algorithm/pstl_frontend_dispatch.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) {
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
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