6 virtual int id () const = 0;
8 class D1_1_Spec : public virtual Spec { };
9 class D1_2_Spec : public virtual Spec { };
10 class D1_3_Spec : public virtual Spec { };
11 class D2_1_Spec : public D1_1_Spec, public D1_2_Spec { };
12 class D2_Spec : public virtual D2_1_Spec, public virtual D1_3_Spec { };
14 struct D3_Spec : public D2_Spec
16 virtual int id () const { return 3; }
20 __attribute__((noinline)) void foo(D3_Spec* spec)