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With inspiration from other libraries

There is a newer version: 2.12.15

/*
 * Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
 * Use of this file is governed by the BSD 3-clause license that
 * can be found in the LICENSE.txt file in the project root.
 */

package org.antlr.v4.tool;

import org.antlr.runtime.RecognitionException;
import org.antlr.runtime.Token;

/** 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 ANTLRMessage {
	public GrammarSyntaxMessage(ErrorType etype,
								String fileName,
								Token offendingToken,
								RecognitionException antlrException,
								Object... args)
	{
		super(etype, antlrException, offendingToken, args);
		this.fileName = fileName;
		this.offendingToken = offendingToken;
		if ( offendingToken!=null ) {
			line = offendingToken.getLine();
			charPosition = offendingToken.getCharPositionInLine();
		}
	}

    @SuppressWarnings({"ThrowableResultOfMethodCallIgnored"})
    @Override
    public RecognitionException getCause() {
        return (RecognitionException)super.getCause();
    }
}