listiterator.cpp

Data Abstraction & Problem Solving with C++源码

// *********************************************************
// Implementation file ListIterator.cpp.
// *********************************************************
#include "ListIterator.h"
// Assumes that the line 
//    friend class ListIterator;
// has been added to ListNode.h

ListIterator::ListIterator(const List *aList, 
                           ListNode *nodePtr)
                           : container(aList),cur(nodePtr)
{
} //end constructor

const ListItemType & ListIterator::operator*()
{
   return cur->item;
} // end operator*

ListIterator ListIterator::operator++()
{
   cur = cur->next;
   return *this;
}  // end prefix operator++

bool ListIterator::operator==(const ListIterator& rhs) const
{
   return ((container==rhs.container) &&
           (cur == rhs.cur));
}  // end operator ==

bool ListIterator::operator!=(const ListIterator& rhs) const
{
   return !(*this == rhs);
}  // end operator !=