macro_token_expander.cc Source File

00001 /*
00002  *  File:       macro_expander.cc
00003  *              $Id: macro_token_expander.cc,v 1.2 2002/05/07 10:02:18 alec Exp $
00004  *
00005  *  Author:     Alec Panoviciu (alecu@email.com)
00006  * 
00007  *  Comments:
00008  *
00009  *  Revision history:
00010  *
00011  *  $Log: macro_token_expander.cc,v $
00012  *  Revision 1.2  2002/05/07 10:02:18  alec
00013  *  fixed some bugs & mem leaks; added MORE tokens support
00014  *
00015  *  Revision 1.1  2002/04/29 17:57:35  alec
00016  *  *** empty log message ***
00017  *
00018  */
00019 
00020 /*
00021   Copyright (C) 2002 Alexandru Panoviciu (alecu@email.com)
00022 
00023   This program is free software; you can redistribute it and/or modify
00024   it under the terms of the GNU General Public License as published by
00025   the Free Software Foundation; either version 2 of the License, or
00026   (at your option) any later version.
00027 
00028   This program is distributed in the hope that it will be useful,
00029   but WITHOUT ANY WARRANTY; without even the implied warranty of
00030   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00031   GNU General Public License for more details.
00032 
00033   You should have received a copy of the GNU General Public License
00034   along with this program; if not, write to the Free Software
00035   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
00036 
00037  */
00038 
00039 
00040 #include "macro_token_expander.hh"
00041 #include "re_node.hh"
00042 
00043 void MacroTokenExpander::addMacro (const string &name,
00044                               ReNode *regexp, const Position &pos)
00045 {
00046   if (macros.find(name) != macros.end())
00047     cerr << formatWarning(pos, string("Macro token \"" + name + "\" redefined"))
00048          << endl
00049          << formatWarning(macros[name].pos, string("     Previous definition of \"")
00050                           + name + "\"") << endl;
00051 
00052   macros[name] = MacroDef(regexp, pos);
00053 }
00054 
00055 ReNode* MacroTokenExpander::getMacro (const string &name) throw (ParseException)
00056 {
00057   if (macros.find(name) == macros.end())
00058     throw ParseException(string("Macro token \"") + name + "\" not defined.");
00059 
00060   return macros[name].regexp->clone();
00061 }