[swift-evolution] [swift-evolution-announce] Revision review: SE-104: Protocol-oriented integers

Howard Lovatt howard.lovatt at gmail.com
Thu Jul 20 19:26:45 CDT 2017

> The revised version of the proposal can be found here:
> https://github.com/apple/swift-evolution/blob/master/
> proposals/0104-improved-integers.md
> • What is your evaluation of the proposal?

Overall +1. Two reservations:

  1. Functions like `signum()` that return a property would read better as
a property!
  2. I have found `BitwiseOperations` useful as an extension to both Bool
and Set and for a custom set type. Therefore would prefer its retention and
even more preferably that Bool and Set implement it.

• Is the problem being addressed significant enough to warrant a change to
> Swift?

Yes, generic representation of integers is useful.

> • Does this proposal fit well with the feel and direction of Swift?

Yes, particularly the re-arrangment of the protocol hierarchy is in keeping
with the rest of the restructuring of the standard library.

> • If you have used other languages or libraries with a similar feature,
> how do you feel that this proposal compares to those?

Yes, many languages I use allow generic numeric functions to be written and
I write my own numeric functions and will therefore use these protocols.

> • How much effort did you put into your review? A glance, a quick reading,
> or an in-depth study?

Quick read, but have pulled my hair out trying to write generic stuff in
Swift as it stands now.
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