24 template <class T> struct D  struct
27   D () : d (0) {}  in D()  argument
28   D (C<T> *x) : d (x) {}  in D()  function
29   D (const D<T>& x) : d (x.d) {}  in D()  function
32   D<T> operator++ (int) { D<T> t = *this; d = d->next; return t; }  argument
84 template <class T> struct G  struct
87   G () { g = new F<T>; }  in G()  argument
88   G (const G<T>& x) { g = x.g; g->a1 (); }  in G()  argument
89   ~G () {}  in ~G()  argument
97   G<T> operator+ (const G<T>& x) const  argument
105   G<T>& operator+= (const G<T>& x)  argument
113 struct H : public G<B>  argument