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04b45450ac
The _LIBCPP_PSTL_CUSTOMIZATION_POINT macro was assuming that the policy was called _RawPolicy and referencing it by name. It happened to always work but this was definitely accidental and an oversight in the original implementation. This patch fixes that by passing the policy to the macro explicitly. Noticed while reviewing #66968.
85 lines
3.1 KiB
C++
85 lines
3.1 KiB
C++
//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___ALGORITHM_PSTL_COPY_H
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#define _LIBCPP___ALGORITHM_PSTL_COPY_H
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#include <__algorithm/copy_n.h>
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#include <__algorithm/pstl_backend.h>
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#include <__algorithm/pstl_frontend_dispatch.h>
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#include <__algorithm/pstl_transform.h>
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#include <__config>
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#include <__functional/identity.h>
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#include <__iterator/concepts.h>
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#include <__type_traits/enable_if.h>
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#include <__type_traits/is_constant_evaluated.h>
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#include <__type_traits/is_execution_policy.h>
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#include <__type_traits/is_trivially_copyable.h>
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#include <__type_traits/remove_cvref.h>
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#include <__utility/move.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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#if !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
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_LIBCPP_BEGIN_NAMESPACE_STD
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// TODO: Use the std::copy/move shenanigans to forward to std::memmove
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template <class>
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void __pstl_copy();
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template <class _ExecutionPolicy,
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class _ForwardIterator,
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class _ForwardOutIterator,
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class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
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enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
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_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator
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copy(_ExecutionPolicy&& __policy, _ForwardIterator __first, _ForwardIterator __last, _ForwardOutIterator __result) {
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return std::__pstl_frontend_dispatch(
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_LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_copy, _RawPolicy),
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[&__policy](_ForwardIterator __g_first, _ForwardIterator __g_last, _ForwardOutIterator __g_result) {
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return std::transform(__policy, __g_first, __g_last, __g_result, __identity());
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},
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std::move(__first),
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std::move(__last),
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std::move(__result));
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}
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template <class>
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void __pstl_copy_n();
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template <class _ExecutionPolicy,
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class _ForwardIterator,
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class _ForwardOutIterator,
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class _Size,
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class _RawPolicy = __remove_cvref_t<_ExecutionPolicy>,
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enable_if_t<is_execution_policy_v<_RawPolicy>, int> = 0>
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_LIBCPP_HIDE_FROM_ABI _ForwardOutIterator
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copy_n(_ExecutionPolicy&& __policy, _ForwardIterator __first, _Size __n, _ForwardOutIterator __result) {
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return std::__pstl_frontend_dispatch(
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_LIBCPP_PSTL_CUSTOMIZATION_POINT(__pstl_copy_n, _RawPolicy),
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[&__policy](_ForwardIterator __g_first, _Size __g_n, _ForwardOutIterator __g_result) {
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if constexpr (__has_random_access_iterator_category_or_concept<_ForwardIterator>::value)
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return std::copy(__policy, __g_first, __g_first + __g_n, __g_result);
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else
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return std::copy_n(__g_first, __g_n, __g_result);
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},
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std::move(__first),
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__n,
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std::move(__result));
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}
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_LIBCPP_END_NAMESPACE_STD
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#endif // !defined(_LIBCPP_HAS_NO_INCOMPLETE_PSTL) && _LIBCPP_STD_VER >= 17
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#endif // _LIBCPP___ALGORITHM_PSTL_COPY_H
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