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 #include "test_macros.h"
17
18 template <class T, class U>
test_is_base_of()19 void test_is_base_of()
20 {
21 static_assert((std::is_base_of<T, U>::value), "");
22 static_assert((std::is_base_of<const T, U>::value), "");
23 static_assert((std::is_base_of<T, const U>::value), "");
24 static_assert((std::is_base_of<const T, const U>::value), "");
25 #if TEST_STD_VER > 14
26 static_assert((std::is_base_of_v<T, U>), "");
27 static_assert((std::is_base_of_v<const T, U>), "");
28 static_assert((std::is_base_of_v<T, const U>), "");
29 static_assert((std::is_base_of_v<const T, const U>), "");
30 #endif
31 }
32
33 template <class T, class U>
test_is_not_base_of()34 void test_is_not_base_of()
35 {
36 static_assert((!std::is_base_of<T, U>::value), "");
37 }
38
39 struct B {};
40 struct B1 : B {};
41 struct B2 : B {};
42 struct D : private B1, private B2 {};
43
main()44 int main()
45 {
46 test_is_base_of<B, D>();
47 test_is_base_of<B1, D>();
48 test_is_base_of<B2, D>();
49 test_is_base_of<B, B1>();
50 test_is_base_of<B, B2>();
51 test_is_base_of<B, B>();
52
53 test_is_not_base_of<D, B>();
54 test_is_not_base_of<B&, D&>();
55 test_is_not_base_of<B[3], D[3]>();
56 test_is_not_base_of<int, int>();
57 }
58