Imho adding conformances for tuples is a good idea, but I wish there was a bigger plan what should happen in the long run, instead of allowing some basic protocols in an ad hoc fashion.
- Will tuple conformance always stay a special-case feature?
- Will it be limited to protocols that only define operators (and some special cases)?
- Or are we going to see
extension (Int, Int): SomeProtocolin the future?
I can't see any downsides for the last option, as it fits great into my model of tuples as anonymous structs - but I know that for every possible change, you can find someone who opposes ;-)
Thinking about this, I might have found a downside myself ;-): When you allow custom conformances, you can have incompatible implementations - this does not happen when everything is handled by the compiler. But the same problem already exists for other types, so imho that's not a dealbreaker. It's still worse for tuples, though...