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/*
pcursor.hh -- part of flowerlib
(c) 1996 Han-Wen Nienhuys&Jan Nieuwenhuizen
*/
#ifndef PCURSOR_HH
#define PCURSOR_HH
/// cursor to go with PointerList
template<class T>
struct PCursor : public Cursor<void *> {
/// make cursor with #no# items back
PCursor<T> operator -( int no) const {
return PCursor<T> (Cursor<void*>::operator-(no));
}
int operator -(PCursor<T> op) const {
return Cursor<void*>::operator-(op);
}
/// make cursor with #no# items further
PCursor<T> operator +( int no) const {
return PCursor<T> (Cursor<void*>::operator+(no));
}
PCursor(const PointerList<T> & l) : Cursor<void*> (l) {}
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(); }
private:
// Cursor<void*>::operator void*;
// sigh
};
/**
don't create PointerList<void*>'s
*/
template<class T>
inline int pcursor_compare(PCursor<T> a,PCursor<T>b)
{
return cursor_compare(Cursor<void*>(a),Cursor<void*> (b));
}
#include "compare.hh"
template_instantiate_compare(PCursor<T>, pcursor_compare, template<class T>);
#endif
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