Bike.Interpreter.Interpreter.OpMultiply C# (CSharp) 메소드

        public object OpMultiply(object lv, object rv)
        {
            if (lv == null || rv == null)
                throw ErrorFactory.CreateTypeError( "Invalid operand type: 'null'");
            if (lv is BikeNumber && rv is BikeNumber)
                return new BikeNumber(((BikeNumber)lv).Value * ((BikeNumber)rv).Value);
            throw ErrorFactory.CreateTypeError(string.Format("Invalid operand type: {0} * {1}", lv, rv));
        }