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_trivially_default_constructible
13 
14 #include <type_traits>
15 
16 template <class T>
test_is_trivially_default_constructible()17 void test_is_trivially_default_constructible()
18 {
19     static_assert( std::is_trivially_default_constructible<T>::value, "");
20     static_assert( std::is_trivially_default_constructible<const T>::value, "");
21     static_assert( std::is_trivially_default_constructible<volatile T>::value, "");
22     static_assert( std::is_trivially_default_constructible<const volatile T>::value, "");
23 }
24 
25 template <class T>
test_has_not_trivial_default_constructor()26 void test_has_not_trivial_default_constructor()
27 {
28     static_assert(!std::is_trivially_default_constructible<T>::value, "");
29     static_assert(!std::is_trivially_default_constructible<const T>::value, "");
30     static_assert(!std::is_trivially_default_constructible<volatile T>::value, "");
31     static_assert(!std::is_trivially_default_constructible<const volatile T>::value, "");
32 }
33 
34 class Empty
35 {
36 };
37 
38 class NotEmpty
39 {
40     virtual ~NotEmpty();
41 };
42 
43 union Union {};
44 
45 struct bit_zero
46 {
47     int :  0;
48 };
49 
50 class Abstract
51 {
52     virtual ~Abstract() = 0;
53 };
54 
55 struct A
56 {
57     A();
58 };
59 
main()60 int main()
61 {
62     test_has_not_trivial_default_constructor<void>();
63     test_has_not_trivial_default_constructor<int&>();
64     test_has_not_trivial_default_constructor<A>();
65     test_has_not_trivial_default_constructor<Abstract>();
66     test_has_not_trivial_default_constructor<NotEmpty>();
67 
68     test_is_trivially_default_constructible<Union>();
69     test_is_trivially_default_constructible<Empty>();
70     test_is_trivially_default_constructible<int>();
71     test_is_trivially_default_constructible<double>();
72     test_is_trivially_default_constructible<int*>();
73     test_is_trivially_default_constructible<const int*>();
74     test_is_trivially_default_constructible<char[3]>();
75     test_is_trivially_default_constructible<bit_zero>();
76 }
77