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111
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1 // { dg-do run }
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2 #include <iostream>
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3
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4 class A1 {
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5 friend class B;
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6 public:
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7 virtual void foo() {}
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8 };
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9
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10 class A2 : public virtual A1 {friend class B;};
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11
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12 class A3 : public virtual A1, private A2 {friend class B;};
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13
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14 class B
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15 {
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16 public:
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17 B(A1* a) : itsA(dynamic_cast<A2*>(a)) {}
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18 A2* itsA;
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19 };
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20
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21 int main()
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22 {
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23 A1* a=new A3;
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24 B b(a);
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25
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26 if (b.itsA)
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27 std::cout << "cast ok" << std::endl;
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28 else
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29 std::cout << "cast failed" << std::endl;
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30 return 0;
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31 }
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