#define PCURSOR_HH
-/// cursor which feels like a pointer
+/// cursor to go with PointerList
template<class T>
-struct PCursor : public Cursor<T> {
+struct PCursor : private Cursor<void *> {
+ friend class IPointerList<T>;
- /// make cursor with #no# items back
- PCursor<T> operator -( int no) const {
- return PCursor<T> (Cursor<T>::operator-(no));
+ /// delete contents
+ void junk();
+public:
+ Cursor<void*>::ok;
+ Cursor<void*>::del;
+ Cursor<void*>::backspace;
+ T get() {
+ T p = ptr();
+ Cursor<void*>::del();
+ return p;
}
-
- /// make cursor with #no# items further
- PCursor<T> operator +( int no) const {
- return PCursor<T> (Cursor<T>::operator+(no));
+ T get_prev() {
+ (*this)--;
+ return get();
}
- PCursor(const List<T> & l) : Cursor<T> (l) {}
+
+ PointerList<T> &list() { return (PointerList<T>&)Cursor<void*>::list(); }
+ PCursor<T> operator++(int) { return Cursor<void*>::operator++(0);}
+ PCursor<T> operator--(int) { return Cursor<void*>::operator--(0); }
+ PCursor<T> operator+=(int i) { return Cursor<void*>::operator+=(i);}
+ PCursor<T> operator-=(int i) { return Cursor<void*>::operator-=(i); }
+ PCursor<T> operator -(int no) const { return Cursor<void*>::operator-(no);}
+ int operator -(PCursor<T> op) const { return Cursor<void*>::operator-(op);}
+ PCursor<T> operator +( int no) const {return Cursor<void*>::operator+(no);} PCursor(const PointerList<T> & l) : Cursor<void*> (l) {}
- PCursor( const Cursor<T>& cursor ) : Cursor<T>(cursor) { }
- T operator ->() const { return *(*(Cursor<T> *)this); }
+ PCursor( const Cursor<void*>& cursor ) : Cursor<void*>(cursor) { }
+ void* vptr() const { return * ((Cursor<void*> &) *this); }
+ // should return T& ?
+ T ptr() const { return (T) vptr(); }
+ T operator ->() const { return ptr(); }
+ operator T() { return ptr(); }
+ T operator *() { return ptr(); }
+ void add(const T& p ) { Cursor<void*>::add((void*) p); }
+ void insert(const T& p ) { Cursor<void*>::insert((void*) p);}
+ static int compare(PCursor<T> a,PCursor<T>b) {
+ return Cursor<void*>::compare(a,b);
+ }
};
/**
- I like operator->(), so here it is.
-
- Cursor to go with pointer list.
+ don't create PointerList<void*>'s.
+ This cursor is just an interface class for Cursor. It takes care of the
+ appropriate type casts
*/
+
+
+
+#include "compare.hh"
+template_instantiate_compare(PCursor<T>, PCursor<T>::compare, template<class T>);
+
#endif