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re_node.hh

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/*
 *  File:       re_node.hh
 *              $Id: re_node.hh,v 1.3 2002/04/29 09:34:10 alec Exp $
 *
 *  Author:     Alec Panoviciu (alecu@email.com)
 *
 *  Comments:
 *
 *  Revision history:
 *
 *  $Log: re_node.hh,v $
 *  Revision 1.3  2002/04/29 09:34:10  alec
 *  scanner ptree building compiles
 *
 */


/* 
  Copyright (C) 2002 Alexandru Panoviciu (alecu@email.com)

  This program is free software; you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation; either version 2 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

 */

#ifndef __RE_NODE_HH__
#define __RE_NODE_HH__

#include "debug.h"
#include "parse_util.hh"

class ReNodeAlgo;

class ReNode
{
public:

  ReNode (const Position &pos_) :
    pos(pos_)
  {}

  virtual ~ReNode () {};

  virtual ReNode* clone () = 0;
  
  virtual bool isLeaf () { return getChildCount() == 0; }

  virtual int getChildCount () = 0;


  virtual ReNode& operator [] (int index) = 0;
  
  virtual bool dfTraverse (ReNodeAlgo &algo);

  const Position& getPos () const { return pos; }

#ifdef DEBUG

  virtual void dump (ostream &os) const = 0;
  
#endif
  
private:

  Position pos;
  
};

#endif /* #ifndef __RE_NODE_HH__ */

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