4165bd6772
function within a class hierarchy (C++ [class.virtual]p2). We use the final-overrider computation to determine when a particular class is ill-formed because it has multiple final overriders for a given virtual function (e.g., because two virtual functions override the same virtual function in the same virtual base class). Fixes PR5973. We also use the final-overrider computation to determine which virtual member functions are pure when determining whether a class is abstract or diagnosing the improper use of an abstract class. The prior approach to determining whether there were any pure virtual functions in a class didn't cope with virtual base class subobjects properly, and could not easily be fixed to deal with the oddities of subobject hiding. Fixes PR6631. llvm-svn: 99351
38 lines
888 B
C++
38 lines
888 B
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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struct A {
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virtual void f() = 0; // expected-note 2{{overridden virtual function}}
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};
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struct Aprime : virtual A {
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virtual void f();
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};
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struct B : Aprime {
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virtual void f(); // expected-note 3{{final overrider of 'A::f'}}
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};
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struct C : virtual A {
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virtual void f(); // expected-note{{final overrider of 'A::f'}}
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};
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struct D : B, C { }; // expected-error{{virtual function 'A::f' has more than one final overrider in 'D'}}
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struct B2 : B { };
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struct E : B, B2 { }; //expected-error{{virtual function 'A::f' has more than one final overrider in 'E'}}
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struct F : B, B2 {
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virtual void f(); // okay
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};
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struct G : F { }; // okay
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struct H : G, A { }; // okay
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namespace MultipleSubobjects {
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struct A { virtual void f(); };
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struct B : A { virtual void f(); };
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struct C : A { virtual void f(); };
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struct D : B, C { }; // okay
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}
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