| //===----------------------------------------------------------------------===// |
| // |
| // 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___TYPE_TRAITS_IS_SCOPED_ENUM_H |
| #define _LIBCPP___TYPE_TRAITS_IS_SCOPED_ENUM_H |
| |
| #include <__config> |
| #include <__type_traits/integral_constant.h> |
| #include <__type_traits/is_convertible.h> |
| #include <__type_traits/is_enum.h> |
| #include <__type_traits/underlying_type.h> |
| |
| #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) |
| # pragma GCC system_header |
| #endif |
| |
| _LIBCPP_BEGIN_NAMESPACE_STD |
| |
| #if _LIBCPP_STD_VER > 20 |
| template <class _Tp, bool = is_enum_v<_Tp> > |
| struct __is_scoped_enum_helper : false_type {}; |
| |
| template <class _Tp> |
| struct __is_scoped_enum_helper<_Tp, true> |
| : public bool_constant<!is_convertible_v<_Tp, underlying_type_t<_Tp> > > {}; |
| |
| template <class _Tp> |
| struct _LIBCPP_TEMPLATE_VIS is_scoped_enum |
| : public __is_scoped_enum_helper<_Tp> {}; |
| |
| template <class _Tp> |
| inline constexpr bool is_scoped_enum_v = is_scoped_enum<_Tp>::value; |
| #endif |
| |
| _LIBCPP_END_NAMESPACE_STD |
| |
| #endif // _LIBCPP___TYPE_TRAITS_IS_SCOPED_ENUM_H |