template<class T> struct sstack;
template<class T,class K> struct Assoc;
template<class T> struct List;
-template<class T> struct PointerList;
-template<class T> struct IPointerList;
+template<class T> struct Pointer_list;
+template<class T> struct IPointer_list;
template<class T> struct Cursor;
template<class T> struct PCursor;
template<class T> struct Link;