1*4bdff4beSrobert //===----------------------------------------------------------------------===// 2*4bdff4beSrobert // 3*4bdff4beSrobert // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4*4bdff4beSrobert // See https://llvm.org/LICENSE.txt for license information. 5*4bdff4beSrobert // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6*4bdff4beSrobert // 7*4bdff4beSrobert //===----------------------------------------------------------------------===// 8*4bdff4beSrobert 9*4bdff4beSrobert #ifndef _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H 10*4bdff4beSrobert #define _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H 11*4bdff4beSrobert 12*4bdff4beSrobert #include <__config> 13*4bdff4beSrobert #include <__type_traits/is_class.h> 14*4bdff4beSrobert #include <__type_traits/is_enum.h> 15*4bdff4beSrobert #include <__type_traits/is_union.h> 16*4bdff4beSrobert #include <__type_traits/remove_cvref.h> 17*4bdff4beSrobert 18*4bdff4beSrobert #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 19*4bdff4beSrobert # pragma GCC system_header 20*4bdff4beSrobert #endif 21*4bdff4beSrobert 22*4bdff4beSrobert _LIBCPP_BEGIN_NAMESPACE_STD 23*4bdff4beSrobert 24*4bdff4beSrobert #if _LIBCPP_STD_VER > 17 25*4bdff4beSrobert 26*4bdff4beSrobert // Whether a type is a class type or enumeration type according to the Core wording. 27*4bdff4beSrobert 28*4bdff4beSrobert template<class _Tp> 29*4bdff4beSrobert concept __class_or_enum = is_class_v<_Tp> || is_union_v<_Tp> || is_enum_v<_Tp>; 30*4bdff4beSrobert 31*4bdff4beSrobert // Work around Clang bug https://llvm.org/PR52970 32*4bdff4beSrobert // TODO: remove this workaround once libc++ no longer has to support Clang 13 (it was fixed in Clang 14). 33*4bdff4beSrobert template<class _Tp> 34*4bdff4beSrobert concept __workaround_52970 = is_class_v<__remove_cvref_t<_Tp>> || is_union_v<__remove_cvref_t<_Tp>>; 35*4bdff4beSrobert 36*4bdff4beSrobert #endif // _LIBCPP_STD_VER > 17 37*4bdff4beSrobert 38*4bdff4beSrobert _LIBCPP_END_NAMESPACE_STD 39*4bdff4beSrobert 40*4bdff4beSrobert #endif // _LIBCPP___CONCEPTS_CLASS_OR_ENUM_H 41