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/*
 *  File:       dfa_re_node_builder.hh
 *              $Id: dfa_re_node_builder.hh,v 1.2 2002/05/22 01:23:23 alec Exp $
 *
 *  Author:     Alec Panoviciu (alecu@email.com)
 *
 *  Comments:
 *
 *  Revision history:
 *
 *  $Log: dfa_re_node_builder.hh,v $
 *  Revision 1.2  2002/05/22 01:23:23  alec
 *  case sensitivity support
 *
 *  Revision 1.1  2002/04/29 09:40:01  alec
 *  *** empty log message ***
 *
 */


/* 
  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 __DFA_RE_NODE_BUILDER_HH__
#define __DFA_RE_NODE_BUILDER_HH__

#include "ire_node_builder.hh"

class DfaSourceRe;
class PropRegistry;


class DfaReNodeBuilder : public IReNodeBuilder
{
public:

  DfaReNodeBuilder (PropRegistry ®istry_) : registry(registry_)
  {}
  
  virtual ReNode* createOrNode (ReNode *pre,
                                ReNode *post, const Position &pos);

  virtual ReNode* createCatNode (ReNode *pre, ReNode *post,
                                 const Position &pos);

  virtual ReNode* createPlusNode (ReNode *in, const Position &pos);

  virtual ReNode* createOptionalNode (ReNode *in, const Position &pos);

  virtual ReNode* createStarNode (ReNode *in, const Position &pos);

  virtual ReNode* createStringLiteralNode (const string& s,
                                           const Position &pos);

  virtual ReNode* createCharListNode (bool negated,
                                      const vector &chars,
                                      const Position &pos);

  /**
   * Creates a new reEotNode that signals the end of the token with the given
   * id.
   */
  DfaSourceRe* createEotNode (int tokId, const Position &pos);

protected:

  /**
   * This is where the "CASE_SENSITIVE" option is implemented. This method
   * does char node(s) construction according to the given option. If the
   * scanner is case-insensitive, for the character 'a' it will actually
   * create the nodes for expression 'a' | 'A'.
   */
  DfaSourceRe* createCharNode (unsigned char match, const Position &pos);

private:

  PropRegistry ®istry;

  /**
   * Caches the CASE_SENSITIVE property from the registry.
   */
  bool caseSensitive;
};

#endif /* #ifndef __DFA_RE_NODE_BUILDER_HH__ */