1 //===----------------------------------------------------------------------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is dual licensed under the MIT and the University of Illinois Open
6 // Source Licenses. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9
10 // type_traits
11
12 // is_abstract
13
14 #include <type_traits>
15 #include "test_macros.h"
16
17 template <class T>
test_is_abstract()18 void test_is_abstract()
19 {
20 static_assert( std::is_abstract<T>::value, "");
21 static_assert( std::is_abstract<const T>::value, "");
22 static_assert( std::is_abstract<volatile T>::value, "");
23 static_assert( std::is_abstract<const volatile T>::value, "");
24 #if TEST_STD_VER > 14
25 static_assert( std::is_abstract_v<T>, "");
26 static_assert( std::is_abstract_v<const T>, "");
27 static_assert( std::is_abstract_v<volatile T>, "");
28 static_assert( std::is_abstract_v<const volatile T>, "");
29 #endif
30 }
31
32 template <class T>
test_is_not_abstract()33 void test_is_not_abstract()
34 {
35 static_assert(!std::is_abstract<T>::value, "");
36 static_assert(!std::is_abstract<const T>::value, "");
37 static_assert(!std::is_abstract<volatile T>::value, "");
38 static_assert(!std::is_abstract<const volatile T>::value, "");
39 #if TEST_STD_VER > 14
40 static_assert(!std::is_abstract_v<T>, "");
41 static_assert(!std::is_abstract_v<const T>, "");
42 static_assert(!std::is_abstract_v<volatile T>, "");
43 static_assert(!std::is_abstract_v<const volatile T>, "");
44 #endif
45 }
46
47 class Empty
48 {
49 };
50
51 class NotEmpty
52 {
53 virtual ~NotEmpty();
54 };
55
56 union Union {};
57
58 struct bit_zero
59 {
60 int : 0;
61 };
62
63 class Abstract
64 {
65 virtual ~Abstract() = 0;
66 };
67
68 template <class>
69 struct AbstractTemplate {
70 virtual void test() = 0;
71 };
72
73 template <>
74 struct AbstractTemplate<double> {};
75
main()76 int main()
77 {
78 test_is_not_abstract<void>();
79 test_is_not_abstract<int&>();
80 test_is_not_abstract<int>();
81 test_is_not_abstract<double>();
82 test_is_not_abstract<int*>();
83 test_is_not_abstract<const int*>();
84 test_is_not_abstract<char[3]>();
85 test_is_not_abstract<char[]>();
86 test_is_not_abstract<Union>();
87 test_is_not_abstract<Empty>();
88 test_is_not_abstract<bit_zero>();
89 test_is_not_abstract<NotEmpty>();
90
91 test_is_abstract<Abstract>();
92 test_is_abstract<AbstractTemplate<int> >();
93 test_is_not_abstract<AbstractTemplate<double> >();
94 }
95