1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2
3 struct A {};
4 struct B : A {};
5 struct C : B {};
6
7 struct D : private A {};
8 struct E : A {};
9 struct F : B, E {};
10
11 struct Incomplete; // expected-note 2 {{forward declaration of 'Incomplete'}}
12
13 struct Poly
14 {
15 virtual void f();
16 };
17
18 struct PolyDerived : Poly
19 {
20 };
21
basic_bad()22 void basic_bad()
23 {
24 // ptr -> nonptr
25 (void)dynamic_cast<A>((A*)0); // expected-error {{invalid target type 'A' for dynamic_cast; target type must be a reference or pointer type to a defined class}}
26 // nonptr -> ptr
27 (void)dynamic_cast<A*>(0); // expected-error {{cannot use dynamic_cast to convert from 'int' to 'A *'}}
28 // ptr -> noncls
29 (void)dynamic_cast<int*>((A*)0); // expected-error {{'int' is not a class type}}
30 // noncls -> ptr
31 (void)dynamic_cast<A*>((int*)0); // expected-error {{'int' is not a class type}}
32 // ref -> noncls
33 (void)dynamic_cast<int&>(*((A*)0)); // expected-error {{'int' is not a class type}}
34 // noncls -> ref
35 (void)dynamic_cast<A&>(*((int*)0)); // expected-error {{'int' is not a class type}}
36 // ptr -> incomplete
37 (void)dynamic_cast<Incomplete*>((A*)0); // expected-error {{'Incomplete' is an incomplete type}}
38 // incomplete -> ptr
39 (void)dynamic_cast<A*>((Incomplete*)0); // expected-error {{'Incomplete' is an incomplete type}}
40 // rvalue -> lvalue
41 (void)dynamic_cast<A&>(A()); // expected-error {{dynamic_cast from rvalue to reference type 'A &'}}
42 }
43
same()44 void same()
45 {
46 (void)dynamic_cast<A*>((A*)0);
47 (void)dynamic_cast<A&>(*((A*)0));
48 }
49
up()50 void up()
51 {
52 (void)dynamic_cast<A*>((B*)0);
53 (void)dynamic_cast<A&>(*((B*)0));
54 (void)dynamic_cast<A*>((C*)0);
55 (void)dynamic_cast<A&>(*((C*)0));
56
57 // Inaccessible
58 //(void)dynamic_cast<A*>((D*)0);
59 //(void)dynamic_cast<A&>(*((D*)0));
60
61 // Ambiguous
62 (void)dynamic_cast<A*>((F*)0); // expected-error {{ambiguous conversion from derived class 'F' to base class 'A':\n struct F -> struct B -> struct A\n struct F -> struct E -> struct A}}
63 (void)dynamic_cast<A&>(*((F*)0)); // expected-error {{ambiguous conversion from derived class 'F' to base class 'A':\n struct F -> struct B -> struct A\n struct F -> struct E -> struct A}}
64 }
65
poly()66 void poly()
67 {
68 (void)dynamic_cast<A*>((Poly*)0);
69 (void)dynamic_cast<A&>(*((Poly*)0));
70 (void)dynamic_cast<A*>((PolyDerived*)0);
71 (void)dynamic_cast<A&>(*((PolyDerived*)0));
72
73 // Not polymorphic source
74 (void)dynamic_cast<Poly*>((A*)0); // expected-error {{'A' is not polymorphic}}
75 (void)dynamic_cast<PolyDerived&>(*((A*)0)); // expected-error {{'A' is not polymorphic}}
76 }
77