77 lines · cpp
1// RUN: %clang_cc1 -fsyntax-only -verify %s2 3struct A {};4struct B : A {};5struct C : B {};6 7struct D : private A {};8struct E : A {};9struct F : B, E {};10 11struct Incomplete; // expected-note 2 {{forward declaration of 'Incomplete'}}12 13struct Poly14{15 virtual void f();16};17 18struct PolyDerived : Poly19{20};21 22void basic_bad()23{24 // ptr -> nonptr25 (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 -> ptr27 (void)dynamic_cast<A*>(0); // expected-error {{cannot use dynamic_cast to convert from 'int' to 'A *'}}28 // ptr -> noncls29 (void)dynamic_cast<int*>((A*)0); // expected-error {{'int' is not a class type}}30 // noncls -> ptr31 (void)dynamic_cast<A*>((int*)0); // expected-error {{'int' is not a class type}}32 // ref -> noncls33 (void)dynamic_cast<int&>(*((A*)0)); // expected-error {{'int' is not a class type}}34 // noncls -> ref35 (void)dynamic_cast<A&>(*((int*)0)); // expected-error {{'int' is not a class type}}36 // ptr -> incomplete37 (void)dynamic_cast<Incomplete*>((A*)0); // expected-error {{'Incomplete' is an incomplete type}}38 // incomplete -> ptr39 (void)dynamic_cast<A*>((Incomplete*)0); // expected-error {{'Incomplete' is an incomplete type}}40 // rvalue -> lvalue41 (void)dynamic_cast<A&>(A()); // expected-error {{dynamic_cast from rvalue to reference type 'A &'}}42}43 44void same()45{46 (void)dynamic_cast<A*>((A*)0);47 (void)dynamic_cast<A&>(*((A*)0));48}49 50void 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 // Inaccessible58 //(void)dynamic_cast<A*>((D*)0);59 //(void)dynamic_cast<A&>(*((D*)0));60 61 // Ambiguous62 (void)dynamic_cast<A*>((F*)0); // expected-error {{ambiguous conversion from derived class 'F' to base class 'A':\n struct F -> B -> A\n struct F -> E -> A}}63 (void)dynamic_cast<A&>(*((F*)0)); // expected-error {{ambiguous conversion from derived class 'F' to base class 'A':\n struct F -> B -> A\n struct F -> E -> A}}64}65 66void 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 source74 (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