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___TYPE_TRAITS_IS_BASE_OF_H
10 #define _LIBCPP___TYPE_TRAITS_IS_BASE_OF_H
11 
12 #include <__config>
13 #include <__type_traits/integral_constant.h>
14 
15 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
16 #  pragma GCC system_header
17 #endif
18 
19 _LIBCPP_BEGIN_NAMESPACE_STD
20 
21 template <class _Bp, class _Dp>
22 struct _LIBCPP_TEMPLATE_VIS is_base_of : public integral_constant<bool, __is_base_of(_Bp, _Dp)> {};
23 
24 #if _LIBCPP_STD_VER >= 17
25 template <class _Bp, class _Dp>
26 inline constexpr bool is_base_of_v = __is_base_of(_Bp, _Dp);
27 #endif
28 
29 _LIBCPP_END_NAMESPACE_STD
30 
31 #endif // _LIBCPP___TYPE_TRAITS_IS_BASE_OF_H
32