static void Main(string[] args) { Stream inputStream = Console.OpenStandardInput(); AntlrInputStream input = new AntlrInputStream(inputStream); CalculatorLexer lexer = new CalculatorLexer(input); lexer.AddErrorHandlers(); CommonTokenStream tokens = new CommonTokenStream(lexer); CalculatorParser parser = new CalculatorParser(tokens); parser.addSubExpr(); Console.ReadLine(); }