source: trunk/yao/share/antlr-2.7.7/antlr/TreeWalkerGrammar.java @ 1

package antlr;

/* ANTLR Translator Generator
 * Project led by Terence Parr at http://www.cs.usfca.edu
 * Software rights: http://www.antlr.org/license.html
 *
 * $Id: //depot/code/org.antlr/release/antlr-2.7.7/antlr/TreeWalkerGrammar.java#2 $
 */

import java.util.Hashtable;
import java.util.Enumeration;
import java.io.IOException;

import antlr.collections.impl.BitSet;
import antlr.collections.impl.Vector;


/** Parser-specific grammar subclass */
class TreeWalkerGrammar extends Grammar {
    // true for transform mode
    protected boolean transform = false;


    TreeWalkerGrammar(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() {
        return "TreeParser";
    }

    /**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;
                antlrTool.setArgOK(i);
            }
            else if (args[i].equals("-traceTreeParser")) {
                traceRules = true;
                antlrTool.setArgOK(i);
            }
//                      else if ( args[i].equals("-debug") ) {
//                              debuggingOutput = true;
//                              superClass = "parseview.DebuggingTreeWalker";
//                              Tool.setArgOK(i);
//                      }
        }
    }

    /** Set tree parser options */
    public boolean setOption(String key, Token value) {
        if (key.equals("buildAST")) {
            if (value.getText().equals("true")) {
                buildAST = true;
            }
            else if (value.getText().equals("false")) {
                buildAST = false;
            }
            else {
                antlrTool.error("buildAST option must be true or false", getFilename(), value.getLine(), value.getColumn());
            }
            return true;
        }
        if (key.equals("ASTLabelType")) {
            super.setOption(key, value);
            return true;
        }        
        if (key.equals("className")) {
            super.setOption(key, value);
            return true;
        }
        if (super.setOption(key, value)) {
            return true;
        }
        antlrTool.error("Invalid option: " + key, getFilename(), value.getLine(), value.getColumn());
        return false;
    }
}