PHPointerListIterator.h

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#ifndef __PHPOINTERLISTITERATOR_H__
#define __PHPOINTERLISTITERATOR_H__

//  Declaration of class PHPointerListIterator
//  Purpose: iterator for access to a PHPointerList
//  Author: Matthias Messer

#include "PHPointerList.h"

template <class T> 
class PHPointerListIterator 
{ 
public: 
  PHPointerListIterator(const PHPointerList<T> &); 
  virtual ~PHPointerListIterator() {}

public: 
   T*           operator()();
   void         operator--();
   void         reset();
   size_t       pos() const { return index; }

protected:
  PHPointerListIterator() : list(0),index(0) {}
  
private: 
  const PHPointerList<T>& list;
  size_t index;   
};

template <class T>
PHPointerListIterator<T>::PHPointerListIterator(const PHPointerList<T>& lis) 
  : list(lis)
{
  reset();
}

template <class T> T* 
PHPointerListIterator<T>::operator()()
{
   index++;
   if (index < list.length())
      {
        return list[index];
      }
   else
     {
       return 0;
     }
}

template <class T> void 
PHPointerListIterator<T>::operator--()
{
    --index;
}

template <class T> void 
PHPointerListIterator<T>::reset()
{
   index =  ~(size_t) 0;
}

#endif /* __PHPOINTERLISTITERATOR_H__ */