void CreateOperatorExpression(ConversionOperatorToken operatorToken)
        {
            switch (operatorToken.Operator)
            {
            case Operator.Add:
                mCurrentOperation = new ConversionAddition();
                break;

            case Operator.Subtract:
                mCurrentOperation = new ConversionSubtraction();
                break;
                ;

            case Operator.Multiply:
                mCurrentOperation = new ConversionMultiplication();
                break;

            case Operator.Divide:
                mCurrentOperation = new ConversionDivision();
                break;
            }
        }
 public void Visit(ConversionOperatorToken conversionOperatorToken)
 {
     CreateOperatorExpression(conversionOperatorToken);
     FillOperation();
 }