PrimInt lacks the wrapping ops and overflowing ops

[dcrewi]

Is this a design decision or has nobody needed it yet?

The wrapping ops are available as via the ops::wrapping::* traits, but it seems like they ought to be a part of PrimInt too. The overflowing ops are completely missing, as far as I can see.

[cuviper]

It's a decision to avoid any breaking changes. The trait isn't sealed, which means we can only add methods with default implementations. For instance, someone could have a newtype wrapper around one of the primitive integer types, for which they implement PrimInt, and they would break if we add new requirements.

[dcrewi]

Okay.

But what about another set of traits for the overflowing ops?

[cuviper]

New traits for overflowing ops would be fine with me.