parsergrammar.java

SRI international 发布的OAA框架软件

package antlr_oaa;

/* ANTLR Translator Generator
 * Project led by Terence Parr at http://www.jGuru.com
 * Software rights: http://www.antlr.org/RIGHTS.html
 *
 * $Id: ParserGrammar.java,v 1.1 2002/11/08 17:37:48 agno Exp $
 */

import java.util.Hashtable;
import java.util.Enumeration;
import java.io.IOException;
import antlr_oaa.collections.impl.BitSet;
import antlr_oaa.collections.impl.Vector;


/** Parser-specific grammar subclass */
class ParserGrammar extends Grammar {


	ParserGrammar(String className_, Tool tool_, String superClass) {
		super(className_, tool_, superClass);
	}
	/** Top-level call to generate the code for this grammar */
	public void generate() throws IOException {
		generator.gen(this);
	}
	// Get name of class from which generated parser/lexer inherits
	protected String getSuperClass() {
		// if debugging, choose the debugging version of the parser
		if (debuggingOutput)
			return "debug.LLkDebuggingParser";
		return "LLkParser"; 
	}
	/**Process command line arguments.
	 * -trace			have all rules call traceIn/traceOut
	 * -traceParser		have parser rules call traceIn/traceOut
	 * -debug			generate debugging output for parser debugger
	 */
	public void processArguments(String[] args) {
		for (int i=0; i<args.length; i++) {
			if ( args[i].equals("-trace") ) {
				traceRules = true;
				Tool.setArgOK(i);
			}
			else if ( args[i].equals("-traceParser") ) {
				traceRules = true;
				Tool.setArgOK(i);
			}
			else if ( args[i].equals("-debug") ) {
				debuggingOutput = true;
				Tool.setArgOK(i);
			}
		}
	}
	/** Set parser options -- performs action on the following options:
	  */
	public boolean setOption(String key, Token value) {
		String s = value.getText();
		if (key.equals("buildAST")) {
			if (s.equals("true")) {
				buildAST = true;
			} else if (s.equals("false")) {
				buildAST = false;
			} else {
				tool.error("buildAST option must be true or false", getFilename(), value.getLine());
			}
			return true;
		}
		if (key.equals("interactive")) {
			if (s.equals("true")) {
				interactive = true;
			} else if (s.equals("false")) {
				interactive = false;
			} else {
				tool.error("interactive option must be true or false", getFilename(), value.getLine());
			}
			return true;
		}
		if (key.equals("ASTLabelType")) {
			super.setOption(key, value);
			return true;
		}	
		if (super.setOption(key, value)) {
			return true;
		}
		tool.error("Invalid option: " + key, getFilename(), value.getLine());
		return false;
	}
}