Joe Gottman wrote:
Deane Yang wrote:
Edward Diener wrote:
Deane Yang wrote:
I have an even more extreme view on this. I don't believe any arithmetic operations should be permitted for constrained numbers. They just don't make sense (would you ever want to add two different days of a month?).
You have chosen a particular type for which arithmetic operations sometimes make little sense. In many other situations this is not the case.
Could you give an example?
One example: adding 2 to Monday to get Wednesday, or adding 2 to Saturday to get Monday.
But that does not correspond to the built-in arithmetic operation. This is modular arithmetic in disguise, so wouldn't make more sense to use a modular integer class (integers mod 7) and represent the days of the week using the numbers 0 to 6?