// This file is part of PUMA.
// Copyright (C) 1999-2003  The PUMA developer team.
//                                                                
// 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 __CMatchChecker__
#define __CMatchChecker__

// Specialized CTreeMatcher implementing action() to
// check whether a syntax tree is matching.

#include "Puma/CTreeMatcher.h"

namespace Puma {


class CMatchChecker : public CTreeMatcher {
  int     _mode;
  bool    _foundMatch;
  bool    _correct;
  CMatch *_matchObj;
  CMatch  _last;
  CTree  *_lastRoot;
        
private:
  void action (CMatch *);
  bool correct (CTree *);
  bool deeper (CTree *, CTree *);

public:
  CMatchChecker (int mode, CTree *matchTree, CMatch *matchObj) : 
    CTreeMatcher (matchTree), _mode (mode), _foundMatch (false), 
    _correct (true), _matchObj (matchObj) {}
        
  bool matchFound () const;
};


} // namespace Puma

#endif /* __CMatchChecker__ */
