52 struct C2  struct
57     explicit C2(int id) : B(id-2), id_(id) {count++;}  in C2()  argument
58     C2(const C2& a) : B(a.id_-2), id_(a.id_) {count++;}  in C2()  argument
59     ~C2() {count--;}  in ~C2()  argument
62 int C2::count = 0;
65     : C1, C2
69     explicit A(int id) : C1(id-1), C2(id-2), id_(id) {count++;}  in A()
70     A(const A& a) : C1(a.id_-1), C2(a.id_-2), id_(a.id_) {count++;}  in A()
80     assert(C2::count == 0);  in f1()
85     assert(C2::count == 1);  in f1()
90     assert(static_cast<C2&>(a).id_ == 3);  in f1()
92     assert(static_cast<B&>(static_cast<C2&>(a)).id_ == 1);  in f1()
103         assert(C2::count == 0);  in f2()
112         assert(static_cast<const C2&>(a).id_ == 3);  in f2()
114         assert(static_cast<const B&>(static_cast<const C2&>(a)).id_ == 1);  in f2()
121     catch (const C2&)  in f2()
137         assert(C2::count == 0);  in f3()
152     catch (const C2&)  in f3()
164         assert(C2::count == 0);  in f4()
173     catch (const C2& c2)  // can catch C2  in f4()
197     assert(C2::count == 0);  in main()