35 lines · c
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-exception6//7//===----------------------------------------------------------------------===//8 9#ifndef _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H10#define _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H11 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_header19#endif20 21_LIBCPP_BEGIN_NAMESPACE_STD22 23#if _LIBCPP_STD_VER >= 2024 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 >= 2031 32_LIBCPP_END_NAMESPACE_STD33 34#endif // _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H35