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_base_of
13 
14 #include <type_traits>
15 
16 template <class T, class U>
17 void test_is_base_of()
18 {
19     static_assert((std::is_base_of<T, U>::value), "");
20     static_assert((std::is_base_of<const T, U>::value), "");
21     static_assert((std::is_base_of<T, const U>::value), "");
22     static_assert((std::is_base_of<const T, const U>::value), "");
23 }
24 
25 template <class T, class U>
26 void test_is_not_base_of()
27 {
28     static_assert((!std::is_base_of<T, U>::value), "");
29 }
30 
31 struct B {};
32 struct B1 : B {};
33 struct B2 : B {};
34 struct D : private B1, private B2 {};
35 
36 int main()
37 {
38     test_is_base_of<B, D>();
39     test_is_base_of<B1, D>();
40     test_is_base_of<B2, D>();
41     test_is_base_of<B, B1>();
42     test_is_base_of<B, B2>();
43     test_is_base_of<B, B>();
44 
45     test_is_not_base_of<D, B>();
46     test_is_not_base_of<B&, D&>();
47     test_is_not_base_of<B[3], D[3]>();
48     test_is_not_base_of<int, int>();
49 }
50