antlr-3.4/tool/src/main/java/org/antlr/tool/GrammarSyntaxMessage.java

/*
 * [The "BSD license"]
 *  Copyright (c) 2010 Terence Parr
 *  All rights reserved.
 *
 *  Redistribution and use in source and binary forms, with or without
 *  modification, are permitted provided that the following conditions
 *  are met:
 *  1. Redistributions of source code must retain the above copyright
 *      notice, this list of conditions and the following disclaimer.
 *  2. Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in the
 *      documentation and/or other materials provided with the distribution.
 *  3. The name of the author may not be used to endorse or promote products
 *      derived from this software without specific prior written permission.
 *
 *  THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 *  IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
 *  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
 *  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
 *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 *  NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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 *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package org.antlr.tool;

import org.antlr.runtime.RecognitionException;
import org.antlr.runtime.Token;
import org.stringtemplate.v4.ST;

/** A problem with the syntax of your antlr grammar such as
 *  "The '{' came as a complete surprise to me at this point in your program"
 */
public class GrammarSyntaxMessage extends Message {
	public Grammar g;
	/** Most of the time, we'll have a token and so this will be set. */
	public Token offendingToken;
	public RecognitionException exception;

	public GrammarSyntaxMessage(int msgID,
								Grammar grammar,
								Token offendingToken,
								RecognitionException exception)
	{
		this(msgID,grammar,offendingToken,null,exception);
	}

	public GrammarSyntaxMessage(int msgID,
								Grammar grammar,
								Token offendingToken,
								Object arg,
								RecognitionException exception)
	{
		super(msgID, arg, null);
		this.offendingToken = offendingToken;
		this.exception = exception;
		this.g = grammar;
	}

	public String toString() {
		line = 0;
		column = 0;
		if ( offendingToken!=null ) {
			line = offendingToken.getLine();
			column = offendingToken.getCharPositionInLine();
		}
		// TODO: actually set the right Grammar instance to get the filename
		// TODO: have to update all v2 grammar files for this. or use errormanager and tool to get the current grammar
		if (g != null) {
			file = g.getFileName();
		}
		ST st = getMessageTemplate();
		if ( arg!=null ) {
			st.add("arg", arg);
		}
		return super.toString(st);
	}
}