1 // { dg-do run } 2 // { dg-options "-fexceptions" } 3 4 #include <typeinfo> 5 #include <stdexcept> 6 7 class A { 8 public: 9 virtual void j () {} 10 }; 11 12 class B : public A { }; 13 14 void x (A& a) { 15 // These should all work. 16 const B& b2 = dynamic_cast<B&>(a); 17 const B& b3 = dynamic_cast<const B&>((const A&)a); 18 const B& b4 = dynamic_cast<const B&>(a); 19 } 20 21 int main() { 22 try { 23 B b; 24 x (b); 25 } catch (std::exception& e) { 26 // If we get a bad_cast, it is wrong. 27 return 1; 28 } 29 } 30
