45 struct C1  struct
50     explicit C1(int id) : B(id-2), id_(id) {count++;}  in C1()  argument
51     C1(const C1& a) : B(a.id_-2), id_(a.id_) {count++;}  in C1()  function
52     ~C1() {count--;}  in ~C1()  argument
55 int C1::count = 0;
70     : C1, C2
74     explicit A(int id) : C1(id-1), C2(id-2), id_(id) {count++;}  in A()
75     A(const A& a) : C1(a.id_-1), C2(a.id_-2), id_(a.id_) {count++;}  in A()
84     assert(C1::count == 0);  in f1()
89     assert(C1::count == 1);  in f1()
94     assert(static_cast<C1&>(a).id_ == 4);  in f1()
96     assert(static_cast<B&>(static_cast<C1&>(a)).id_ == 2);  in f1()
107         assert(C1::count == 0);  in f2()
116         assert(static_cast<const C1&>(a).id_ == 4);  in f2()
118         assert(static_cast<const B&>(static_cast<const C1&>(a)).id_ == 2);  in f2()
122     catch (const C1&)  in f2()
141         assert(C1::count == 0);  in f3()
151     catch (const C1& c1)  // can catch C1  in f3()
168         assert(C1::count == 0);  in f4()
184     catch (const C1&)  in f4()
201     assert(C1::count == 0);  in main()