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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_MERGE_H
#define _LIBCPP___ALGORITHM_PSTL_MERGE_H
#include <__algorithm/pstl_backend.h>
#include <__config>
#include <__functional/operations.h>
#include <__type_traits/enable_if.h>
#include <__type_traits/is_execution_policy.h>
#include <__type_traits/remove_cvref.h>
#include <__utility/move.h>
#include <optional>
#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
# pragma GCC system_header
#endif
#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
_LIBCPP_BEGIN_NAMESPACE_STD
template <class _ExecutionPolicy,
class _ForwardIterator1,
class _ForwardIterator2,
class _ForwardOutIterator,
class _Comp = std::less<>,
class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
[[nodiscard]] _LIBCPP_HIDE_FROM_ABI optional<_ForwardOutIterator>
__merge(_ExecutionPolicy&&,
_ForwardIterator1 __first1,
_ForwardIterator1 __last1,
_ForwardIterator2 __first2,
_ForwardIterator2 __last2,
_ForwardOutIterator __result,
_Comp __comp = {}) noexcept {
using _Backend = typename __select_backend<_RawPolicy>::type;
return std::__pstl_merge<_RawPolicy>(
_Backend{},
std::move(__first1),
std::move(__last1),
std::move(__first2),
std::move(__last2),
std::move(__result),
std::move(__comp));
}
template <class _ExecutionPolicy,
class _ForwardIterator1,
class _ForwardIterator2,
class _ForwardOutIterator,
class _Comp = std::less<>,
class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator
merge(_ExecutionPolicy&& __policy,
_ForwardIterator1 __first1,
_ForwardIterator1 __last1,
_ForwardIterator2 __first2,
_ForwardIterator2 __last2,
_ForwardOutIterator __result,
_Comp __comp = {}) {
auto __res = std::__merge(
__policy,
std::move(__first1),
std::move(__last1),
std::move(__first2),
std::move(__last2),
std::move(__result),
std::move(__comp));
if (!__res)
std::__throw_bad_alloc();
return *std::move(__res);
}
_LIBCPP_END_NAMESPACE_STD
#endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
#endif // _LIBCPP___ALGORITHM_PSTL_MERGE_H
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