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      1 // RUN: %clang_cc1 -fsyntax-only -verify %s
      2 struct A {
      3   virtual void f() = 0; // expected-note 2{{overridden virtual function}}
      4 };
      5 
      6 struct Aprime : virtual A {
      7   virtual void f();
      8 };
      9 
     10 struct B : Aprime {
     11   virtual void f(); // expected-note 3{{final overrider of 'A::f'}}
     12 };
     13 
     14 struct C : virtual A {
     15   virtual void f(); // expected-note{{final overrider of 'A::f'}}
     16 };
     17 
     18 struct D : B, C { }; // expected-error{{virtual function 'A::f' has more than one final overrider in 'D'}}
     19 
     20 struct B2 : B { };
     21 
     22 struct E : B, B2 { }; //expected-error{{virtual function 'A::f' has more than one final overrider in 'E'}}
     23 
     24 struct F : B, B2 {
     25   virtual void f(); // okay
     26 };
     27 
     28 struct G : F { }; // okay
     29 
     30 struct H : G, A { }; // okay
     31 
     32 namespace MultipleSubobjects {
     33   struct A { virtual void f(); };
     34   struct B : A { virtual void f(); };
     35   struct C : A { virtual void f(); };
     36   struct D : B, C { }; // okay
     37 }
     38