// Fig. 21.3: Listnode.h
// Template ListNode class definition.
#ifndef LISTNODE_H
#define LISTNODE_H

// forward declaration of class List required to announce that class 
// List exists so it can be used in the friend declaration at line 13
template< typename NODETYPE > class List;                            

template< typename NODETYPE >
class ListNode 
{
   friend class List< NODETYPE >; // make List a friend

public:
   ListNode( const NODETYPE & ); // constructor
   NODETYPE getData() const; // return data in node
private:
   NODETYPE data; // data
   ListNode< NODETYPE > *nextPtr; // next node in list
}; // end class ListNode

// constructor
template< typename NODETYPE >
ListNode< NODETYPE >::ListNode( const NODETYPE &info )
   : data( info ), nextPtr( 0 ) 
{ 
   // empty body
} // end ListNode constructor

// return copy of data in node
template< typename NODETYPE >
NODETYPE ListNode< NODETYPE >::getData() const 
{ 
   return data; 
} // end function getData

#endif

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