5d4439cc3e
release/17.x branch, commit 8f4dd44097c9ae25dd203d5ac87f3b48f854bba8 This adds the flag `-D_LIBCPP_PSTL_CPU_BACKEND_SERIAL`. A future enhancement could possibly pass something different if there is a compelling parallel implementation. That libdispatch one might be worth looking into.
41 lines
1.3 KiB
C++
Vendored
41 lines
1.3 KiB
C++
Vendored
//===----------------------------------------------------------------------===//
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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___CONCEPTS_CLASS_OR_ENUM_H
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#define _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H
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#include <__config>
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#include <__type_traits/is_class.h>
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#include <__type_traits/is_enum.h>
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#include <__type_traits/is_union.h>
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#include <__type_traits/remove_cvref.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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_LIBCPP_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER >= 20
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// Whether a type is a class type or enumeration type according to the Core wording.
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template <class _Tp>
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concept __class_or_enum = is_class_v<_Tp> || is_union_v<_Tp> || is_enum_v<_Tp>;
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// Work around Clang bug https://llvm.org/PR52970
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// TODO: remove this workaround once libc++ no longer has to support Clang 13 (it was fixed in Clang 14).
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template <class _Tp>
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concept __workaround_52970 = is_class_v<__remove_cvref_t<_Tp>> || is_union_v<__remove_cvref_t<_Tp>>;
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#endif // _LIBCPP_STD_VER >= 20
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H
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