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

[Xiaodi Wu]

Hi Howard,

The removal of BitwiseOperations is not under review here; that, like
signum(), has been considered twice and approved twice, and has not been
revised.

On Thu, Jul 20, 2017 at 19:36 Howard Lovatt via swift-evolution <
swift-evolution at swift.org> wrote:

> 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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>
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