#ifndef PLISTELEMENT_H
#define PLISTELEMENT_H


//*****************************************************************************
//
//			PListElement.h
//
//*****************************************************************************
//
//      Copyright (C) 1996 
//
//                      Ronald A. MacCracken
//			Graduate Student
//                      Computer Science Department
//                      University of California
//                      Davis, CA  95616
//
//      Permission is granted to use at your own risk and 
//      distribute this software in source and binary forms 
//      provided the above copyright notice and this paragraph 
//      are preserved on all copies.  This software is provided 
//      "as is" with no express or implied warranty.
//
//*****************************************************************************


//*****************************************************************************
//
// NOTE: This class is used solely by the the template PList and PListIterator
//	 classes, and should not be used in application code.
//
// This class' constructors, like the PList class, creates copies of the
// data if a reference is passed, but uses the data if a pointer is passed.
//
//*****************************************************************************


template<class TYPE> 
class PListElement
{

private:

    TYPE*		data ;
    PListElement<TYPE>*	next ;


private:

    void		Copy   ( const PListElement<TYPE>& ) ;
    void		Delete ( void ) ;


public:


			// default constructor

			PListElement ( void ) ;


			// user-defined constructors

			PListElement ( TYPE* ) ;


			// copy constructors

			PListElement ( const PListElement<TYPE>& ) ;


			// destructors

			~PListElement ( void ) ;


			// assignment operator

    PListElement<TYPE>&	operator= ( const PListElement<TYPE>& ) ;


			// return new element with same data

    PListElement<TYPE>*	Get_Copy ( void ) const ;


			// access functions

    PListElement<TYPE>*	Get_Next ( void ) const		    { return  next ; }

    TYPE*		Get_Data ( void )		    { return  data ; }
    const TYPE*		Get_Data ( void ) const		    { return  data ; }

    void		Set_Data ( TYPE* d ) 			{ data = d ; }
    void		Set_Next ( PListElement<TYPE>* n )	{ next = n ; } 


			// compare data pointers

    int			Compare_Data ( const TYPE* ) const ;

} ;


#include "PListElement.C"

#endif