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// type_traits
10
11// is_object
12
13#include <type_traits>
14#include <cstddef> // for std::nullptr_t
15#include "test_macros.h"
16
17template <class T>
18void test_is_object()
19{
20 static_assert( std::is_object<T>::value, "");
21 static_assert( std::is_object<const T>::value, "");
22 static_assert( std::is_object<volatile T>::value, "");
23 static_assert( std::is_object<const volatile T>::value, "");
24#if TEST_STD_VER > 14
25 static_assert( std::is_object_v<T>, "");
26 static_assert( std::is_object_v<const T>, "");
27 static_assert( std::is_object_v<volatile T>, "");
28 static_assert( std::is_object_v<const volatile T>, "");
29#endif
30}
31
32template <class T>
33void test_is_not_object()
34{
35 static_assert(!std::is_object<T>::value, "");
36 static_assert(!std::is_object<const T>::value, "");
37 static_assert(!std::is_object<volatile T>::value, "");
38 static_assert(!std::is_object<const volatile T>::value, "");
39#if TEST_STD_VER > 14
40 static_assert(!std::is_object_v<T>, "");
41 static_assert(!std::is_object_v<const T>, "");
42 static_assert(!std::is_object_v<volatile T>, "");
43 static_assert(!std::is_object_v<const volatile T>, "");
44#endif
45}
46
47class incomplete_type;
48
49class Empty
50{
51};
52
53class NotEmpty
54{
55 virtual ~NotEmpty();
56};
57
58union Union {};
59
60struct bit_zero
61{
62 int : 0;
63};
64
65class Abstract
66{
67 virtual ~Abstract() = 0;
68};
69
70enum Enum {zero, one};
71
72typedef void (*FunctionPtr)();
73
74
75int main(int, char**)
76{
77// An object type is a (possibly cv-qualified) type that is not a function type,
78// not a reference type, and not a void type.
79
80 test_is_object<std::nullptr_t>();
81 test_is_object<void *>();
82 test_is_object<char[3]>();
83 test_is_object<char[]>();
84 test_is_object<int>();
85 test_is_object<int*>();
86 test_is_object<Union>();
87 test_is_object<int*>();
88 test_is_object<const int*>();
89 test_is_object<Enum>();
90 test_is_object<incomplete_type>();
91 test_is_object<bit_zero>();
92 test_is_object<NotEmpty>();
93 test_is_object<Abstract>();
94 test_is_object<FunctionPtr>();
95 test_is_object<int Empty::*>();
96 test_is_object<void (Empty::*)(int)>();
97
98 test_is_not_object<void>();
99 test_is_not_object<int&>();
100 test_is_not_object<int&&>();
101 test_is_not_object<int(int)>();
102
103 return 0;
104}
105

source code of libcxx/test/std/utilities/meta/meta.unary/meta.unary.comp/is_object.pass.cpp