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_OBJECT_H
10 #define _LIBCPP___TYPE_TRAITS_IS_OBJECT_H
11 
12 #include <__config>
13 #include <__type_traits/integral_constant.h>
14 #include <__type_traits/is_array.h>
15 #include <__type_traits/is_class.h>
16 #include <__type_traits/is_scalar.h>
17 #include <__type_traits/is_union.h>
18 
19 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
20 #  pragma GCC system_header
21 #endif
22 
23 _LIBCPP_BEGIN_NAMESPACE_STD
24 
25 #if __has_builtin(__is_object)
26 
27 template<class _Tp>
28 struct _LIBCPP_TEMPLATE_VIS is_object : _BoolConstant<__is_object(_Tp)> { };
29 
30 #if _LIBCPP_STD_VER > 14
31 template <class _Tp>
32 inline constexpr bool is_object_v = __is_object(_Tp);
33 #endif
34 
35 #else // __has_builtin(__is_object)
36 
37 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS is_object
38     : public integral_constant<bool, is_scalar<_Tp>::value ||
39                                      is_array<_Tp>::value  ||
40                                      is_union<_Tp>::value  ||
41                                      is_class<_Tp>::value  > {};
42 
43 #if _LIBCPP_STD_VER > 14
44 template <class _Tp>
45 inline constexpr bool is_object_v = is_object<_Tp>::value;
46 #endif
47 
48 #endif // __has_builtin(__is_object)
49 
50 _LIBCPP_END_NAMESPACE_STD
51 
52 #endif // _LIBCPP___TYPE_TRAITS_IS_OBJECT_H
53