зеркало из https://github.com/microsoft/clang-1.git
75 строки
2.2 KiB
C++
75 строки
2.2 KiB
C++
// RUN: clang -fsyntax-only -verify %s
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struct A {};
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struct B : A {};
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struct C : B {};
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struct D : private A {};
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struct E : A {};
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struct F : B, E {};
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struct Incomplete;
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struct Poly
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{
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virtual void f();
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};
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struct PolyDerived : Poly
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{
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};
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void basic_bad()
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{
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// ptr -> nonptr
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(void)dynamic_cast<A>((A*)0); // expected-error {{'struct A' is not a reference or pointer}}
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// nonptr -> ptr
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(void)dynamic_cast<A*>(0); // expected-error {{'int' is not a pointer}}
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// ptr -> noncls
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(void)dynamic_cast<int*>((A*)0); // expected-error {{'int' is not a class}}
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// noncls -> ptr
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(void)dynamic_cast<A*>((int*)0); // expected-error {{'int' is not a class}}
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// ref -> noncls
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(void)dynamic_cast<int&>(*((A*)0)); // expected-error {{'int' is not a class}}
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// noncls -> ref
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(void)dynamic_cast<A&>(*((int*)0)); // expected-error {{'int' is not a class}}
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// ptr -> incomplete
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(void)dynamic_cast<Incomplete*>((A*)0); // expected-error {{'struct Incomplete' is an incomplete type}}
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// incomplete -> ptr
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(void)dynamic_cast<A*>((Incomplete*)0); // expected-error {{'struct Incomplete' is an incomplete type}}
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}
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void same()
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{
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(void)dynamic_cast<A*>((A*)0);
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(void)dynamic_cast<A&>(*((A*)0));
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}
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void up()
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{
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(void)dynamic_cast<A*>((B*)0);
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(void)dynamic_cast<A&>(*((B*)0));
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(void)dynamic_cast<A*>((C*)0);
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(void)dynamic_cast<A&>(*((C*)0));
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// Inaccessible
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//(void)dynamic_cast<A*>((D*)0);
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//(void)dynamic_cast<A&>(*((D*)0));
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// Ambiguous
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(void)dynamic_cast<A*>((F*)0); // expected-error {{ambiguous conversion from derived class 'struct F' to base class 'struct A':\n struct F -> struct B -> struct A\n struct F -> struct E -> struct A}}
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(void)dynamic_cast<A&>(*((F*)0)); // expected-error {{ambiguous conversion from derived class 'struct F' to base class 'struct A':\n struct F -> struct B -> struct A\n struct F -> struct E -> struct A}}
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}
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void poly()
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{
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(void)dynamic_cast<A*>((Poly*)0);
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(void)dynamic_cast<A&>(*((Poly*)0));
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(void)dynamic_cast<A*>((PolyDerived*)0);
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(void)dynamic_cast<A&>(*((PolyDerived*)0));
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// Not polymorphic source
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(void)dynamic_cast<Poly*>((A*)0); // expected-error {{'struct A' is not polymorphic}}
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(void)dynamic_cast<PolyDerived&>(*((A*)0)); // expected-error {{'struct A' is not polymorphic}}
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}
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