31 struct C1  struct
36     explicit C1(int id) : B(id-2), id_(id) {count++;}  in C1()  function
37     C1(const C1& a) : B(a.id_-2), id_(a.id_) {count++;}  in C1()  function
38     ~C1() {count--;}  in ~C1()  argument
41 int C1::count = 0;
56     : C1, C2
60     explicit A(int id) : C1(id-1), C2(id-2), id_(id) {count++;}  in A()
61     A(const A& a) : C1(a.id_-1), C2(a.id_-2), id_(a.id_) {count++;}  in A()
70     assert(C1::count == 0);  in f1()
75     assert(C1::count == 1);  in f1()
80     assert(static_cast<C1&>(a).id_ == 4);  in f1()
82     assert(static_cast<B&>(static_cast<C1&>(a)).id_ == 2);  in f1()
93         assert(C1::count == 0);  in f2()
102         assert(static_cast<const C1&>(a).id_ == 4);  in f2()
104         assert(static_cast<const B&>(static_cast<const C1&>(a)).id_ == 2);  in f2()
108     catch (const C1&)  in f2()
127         assert(C1::count == 0);  in f3()
137     catch (const C1& c1)  // can catch C1  in f3()
154         assert(C1::count == 0);  in f4()
170     catch (const C1&)  in f4()
187     assert(C1::count == 0);  in main()