void OnEnable()
{
Debug.Log("------------------");
Debug.Log("VISITOR DESIGN PATTERN");
// testing the pattern:
TaxVisitor taxCalc = new TaxVisitor();
TaxHolidayVisitor taxHolidayCalc = new TaxHolidayVisitor();
Necessity milk = new Necessity(3.25);
Liquor vodka = new Liquor(11.99);
Tobacco cigars = new Tobacco(19.99);
double milkPrice = milk.Accept(taxCalc);
double milkPriceHoliday = milk.Accept(taxHolidayCalc);
Debug.Log("Milk costs: " + milkPrice.ToString() + ", Holiday Price: " + milkPriceHoliday.ToString());
double vodkaPrice = vodka.Accept(taxCalc);
double vodkaHolidayPrice = vodka.Accept(taxHolidayCalc);
Debug.Log("Vodka costs: " + vodkaPrice.ToString() + ", Holiday Price: " + vodkaHolidayPrice.ToString());
double cigarsPrice = cigars.Accept(taxCalc);
double cigarsPriceHoliday = cigars.Accept(taxHolidayCalc);
Debug.Log("Cigars cost: " + cigarsPrice.ToString() + ", Holiday Price: " + cigarsPriceHoliday.ToString());
}