class ErrorPrinter implements ANTLRErrorListener<any> {
    syntaxError (recognizer: Recognizer<any, any>, offendingSymbol: any | undefined, line: number, charPositionInLine: number, msg: string, e: RecognitionException | undefined) {
        if (e) {   
            console.log ("line: "+line+" positon: "+charPositionInLine+" message: "+msg);

        }
    } 
}