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_HAS_VIRTUAL_DESTRUCTOR_H
10 #define _LIBCPP___TYPE_TRAITS_HAS_VIRTUAL_DESTRUCTOR_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 #if __has_builtin(__has_virtual_destructor)
22 
23 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_virtual_destructor
24     : public integral_constant<bool, __has_virtual_destructor(_Tp)> {};
25 
26 #else
27 
28 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_virtual_destructor
29     : public false_type {};
30 
31 #endif
32 
33 #if _LIBCPP_STD_VER > 14
34 template <class _Tp>
35 inline constexpr bool has_virtual_destructor_v = has_virtual_destructor<_Tp>::value;
36 #endif
37 
38 _LIBCPP_END_NAMESPACE_STD
39 
40 #endif // _LIBCPP___TYPE_TRAITS_HAS_VIRTUAL_DESTRUCTOR_H
41