1//===----------------------------------------------------------------------===//
 2//
 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 4// See https://llvm.org/LICENSE.txt for license information.
 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 6//
 7//===----------------------------------------------------------------------===//
 8
 9#ifndef _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H
10#define _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H
11
12#include <__config>
13#include <__type_traits/is_class.h>
14#include <__type_traits/is_enum.h>
15#include <__type_traits/is_union.h>
16
17#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
18#  pragma GCC system_header
19#endif
20
21_LIBCPP_BEGIN_NAMESPACE_STD
22
23#if _LIBCPP_STD_VER >= 20
24
25// Whether a type is a class type or enumeration type according to the Core wording.
26
27template <class _Tp>
28concept __class_or_enum = is_class_v<_Tp> || is_union_v<_Tp> || is_enum_v<_Tp>;
29
30#endif // _LIBCPP_STD_VER >= 20
31
32_LIBCPP_END_NAMESPACE_STD
33
34#endif // _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H