| //===----------------------------------------------------------------------===// |
| // |
| // 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___CONCEPTS_CLASS_OR_ENUM_H |
| #define _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H |
| |
| #include <__config> |
| #include <type_traits> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if _LIBCPP_STD_VER > 17 |
| |
| // Whether a type is a class type or enumeration type according to the Core wording. |
| |
| template<class _Tp> |
| concept __class_or_enum = is_class_v<_Tp> || is_union_v<_Tp> || is_enum_v<_Tp>; |
| |
| // Work around Clang bug https://llvm.org/PR52970 |
| // TODO: remove this workaround once libc++ no longer has to support Clang 13 (it was fixed in Clang 14). |
| template<class _Tp> |
| concept __workaround_52970 = is_class_v<__uncvref_t<_Tp>> || is_union_v<__uncvref_t<_Tp>>; |
| |
| #endif // _LIBCPP_STD_VER > 17 |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H |
