/*
* ArithmeticParser.java
*
* THIS FILE HAS BEEN GENERATED AUTOMATICALLY. DO NOT EDIT!
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3
* of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free
* Software Foundation, Inc., 59 Temple Place, Suite 330, Boston,
* MA 02111-1307, USA.
*
* Copyright (c) 2003 Per Cederberg. All rights reserved.
*/
package net.percederberg.grammatica.test;
import java.io.Reader;
import net.percederberg.grammatica.parser.ParserCreationException;
import net.percederberg.grammatica.parser.ProductionPattern;
import net.percederberg.grammatica.parser.ProductionPatternAlternative;
import net.percederberg.grammatica.parser.RecursiveDescentParser;
import net.percederberg.grammatica.parser.Tokenizer;
/**
* A token stream parser.
*
* @author Per Cederberg, <per at percederberg dot net>
* @version 1.0
*/
class ArithmeticParser extends RecursiveDescentParser {
/**
* Creates a new parser with a default analyzer.
*
* @param in the input stream to read from
*
* @throws ParserCreationException if the parser couldn't be
* initialized correctly
*/
public ArithmeticParser(Reader in) throws ParserCreationException {
super(in);
createPatterns();
}
/**
* Creates a new parser.
*
* @param in the input stream to read from
* @param analyzer the analyzer to use while parsing
*
* @throws ParserCreationException if the parser couldn't be
* initialized correctly
*/
public ArithmeticParser(Reader in, ArithmeticAnalyzer analyzer)
throws ParserCreationException {
super(in, analyzer);
createPatterns();
}
/**
* Creates a new tokenizer for this parser. Can be overridden by a
* subclass to provide a custom implementation.
*
* @param in the input stream to read from
*
* @return the tokenizer created
*
* @throws ParserCreationException if the tokenizer couldn't be
* initialized correctly
*/
protected Tokenizer newTokenizer(Reader in)
throws ParserCreationException {
return new ArithmeticTokenizer(in);
}
/**
* Initializes the parser by creating all the production patterns.
*
* @throws ParserCreationException if the parser couldn't be
* initialized correctly
*/
private void createPatterns() throws ParserCreationException {
ProductionPattern pattern;
ProductionPatternAlternative alt;
pattern = new ProductionPattern(ArithmeticConstants.EXPRESSION,
"Expression");
alt = new ProductionPatternAlternative();
alt.addProduction(ArithmeticConstants.TERM, 1, 1);
alt.addProduction(ArithmeticConstants.EXPRESSION_REST, 0, 1);
pattern.addAlternative(alt);
addPattern(pattern);
pattern = new ProductionPattern(ArithmeticConstants.EXPRESSION_REST,
"ExpressionRest");
alt = new ProductionPatternAlternative();
alt.addToken(ArithmeticConstants.ADD, 1, 1);
alt.addProduction(ArithmeticConstants.EXPRESSION, 1, 1);
pattern.addAlternative(alt);
alt = new ProductionPatternAlternative();
alt.addToken(ArithmeticConstants.SUB, 1, 1);
alt.addProduction(ArithmeticConstants.EXPRESSION, 1, 1);
pattern.addAlternative(alt);
addPattern(pattern);
pattern = new ProductionPattern(ArithmeticConstants.TERM,
"Term");
alt = new ProductionPatternAlternative();
alt.addProduction(ArithmeticConstants.FACTOR, 1, 1);
alt.addProduction(ArithmeticConstants.TERM_REST, 0, 1);
pattern.addAlternative(alt);
addPattern(pattern);
pattern = new ProductionPattern(ArithmeticConstants.TERM_REST,
"TermRest");
alt = new ProductionPatternAlternative();
alt.addToken(ArithmeticConstants.MUL, 1, 1);
alt.addProduction(ArithmeticConstants.TERM, 1, 1);
pattern.addAlternative(alt);
alt = new ProductionPatternAlternative();
alt.addToken(ArithmeticConstants.DIV, 1, 1);
alt.addProduction(ArithmeticConstants.TERM, 1, 1);
pattern.addAlternative(alt);
addPattern(pattern);
pattern = new ProductionPattern(ArithmeticConstants.FACTOR,
"Factor");
alt = new ProductionPatternAlternative();
alt.addProduction(ArithmeticConstants.ATOM, 1, 1);
pattern.addAlternative(alt);
alt = new ProductionPatternAlternative();
alt.addToken(ArithmeticConstants.LEFT_PAREN, 1, 1);
alt.addProduction(ArithmeticConstants.EXPRESSION, 1, 1);
alt.addToken(ArithmeticConstants.RIGHT_PAREN, 1, 1);
pattern.addAlternative(alt);
addPattern(pattern);
pattern = new ProductionPattern(ArithmeticConstants.ATOM,
"Atom");
alt = new ProductionPatternAlternative();
alt.addToken(ArithmeticConstants.NUMBER, 1, 1);
pattern.addAlternative(alt);
alt = new ProductionPatternAlternative();
alt.addToken(ArithmeticConstants.IDENTIFIER, 1, 1);
pattern.addAlternative(alt);
addPattern(pattern);
}
}