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_null_pointer
12
13 // UNSUPPORTED: c++03, c++11
14
15 #include <type_traits>
16 #include <cstddef> // for std::nullptr_t
17 #include "test_macros.h"
18
19 template <class T>
test_is_null_pointer()20 void test_is_null_pointer()
21 {
22 static_assert( std::is_null_pointer<T>::value, "");
23 static_assert( std::is_null_pointer<const T>::value, "");
24 static_assert( std::is_null_pointer<volatile T>::value, "");
25 static_assert( std::is_null_pointer<const volatile T>::value, "");
26 #if TEST_STD_VER > 14
27 static_assert( std::is_null_pointer_v<T>, "");
28 static_assert( std::is_null_pointer_v<const T>, "");
29 static_assert( std::is_null_pointer_v<volatile T>, "");
30 static_assert( std::is_null_pointer_v<const volatile T>, "");
31 #endif
32 }
33
34 template <class T>
test_is_not_null_pointer()35 void test_is_not_null_pointer()
36 {
37 static_assert(!std::is_null_pointer<T>::value, "");
38 static_assert(!std::is_null_pointer<const T>::value, "");
39 static_assert(!std::is_null_pointer<volatile T>::value, "");
40 static_assert(!std::is_null_pointer<const volatile T>::value, "");
41 #if TEST_STD_VER > 14
42 static_assert(!std::is_null_pointer_v<T>, "");
43 static_assert(!std::is_null_pointer_v<const T>, "");
44 static_assert(!std::is_null_pointer_v<volatile T>, "");
45 static_assert(!std::is_null_pointer_v<const volatile T>, "");
46 #endif
47 }
48
49 class Empty
50 {
51 };
52
53 class NotEmpty
54 {
55 virtual ~NotEmpty();
56 };
57
58 union Union {};
59
60 struct bit_zero
61 {
62 int : 0;
63 };
64
65 class Abstract
66 {
67 virtual ~Abstract() = 0;
68 };
69
70 enum Enum {zero, one};
71 struct incomplete_type;
72
73 typedef void (*FunctionPtr)();
74
main(int,char **)75 int main(int, char**)
76 {
77 test_is_null_pointer<std::nullptr_t>();
78
79 test_is_not_null_pointer<void>();
80 test_is_not_null_pointer<int>();
81 test_is_not_null_pointer<int&>();
82 test_is_not_null_pointer<int&&>();
83 test_is_not_null_pointer<int*>();
84 test_is_not_null_pointer<double>();
85 test_is_not_null_pointer<const int*>();
86 test_is_not_null_pointer<char[3]>();
87 test_is_not_null_pointer<char[]>();
88 test_is_not_null_pointer<Union>();
89 test_is_not_null_pointer<Enum>();
90 test_is_not_null_pointer<FunctionPtr>();
91 test_is_not_null_pointer<Empty>();
92 test_is_not_null_pointer<bit_zero>();
93 test_is_not_null_pointer<NotEmpty>();
94 test_is_not_null_pointer<Abstract>();
95 test_is_not_null_pointer<incomplete_type>();
96
97 return 0;
98 }
99