/*
* xtc - The eXTensible Compiler
* Copyright (C) 2004-2005 Robert Grimm
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2 as published by the Free Software Foundation.
*
* 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, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
* USA.
*/
package xtc.parser;
import xtc.util.Runtime;
/**
* Visitor to rename nonterminals.
*
* @author Robert Grimm
* @version $Revision: 1.5 $
*/
public class Renamer extends GrammarVisitor {
/**
* The interface to the actual mapping from nonterminals to
* nonterminals.
*/
public interface Translation {
/**
* Map the specified nonterminal to its replacement, which may be
* the same as the original.
*
* @param nt The nonterminal.
* @param analyzer The analyzer utility.
* @return The translated nonterminal.
*/
public NonTerminal map(NonTerminal nt, Analyzer analyzer);
}
// -----------------------------------------------------------------------
/** The mapping. */
protected Translation translation;
/**
* Create a new renamer.
*
* @param runtime The runtime.
* @param analyzer The analyzer utility.
* @param translation The mapping from nonterminals to nonterminals.
*/
public Renamer(Runtime runtime, Analyzer analyzer, Translation translation) {
super(runtime, analyzer);
this.translation = translation;
}
/** Visit the specified nonterminal. */
public Element visit(NonTerminal nt) {
return translation.map(nt, analyzer);
}
}