[swift-evolution] SetAlgebra naming update

Chris Lattner clattner at apple.com
Tue Mar 29 18:38:38 CDT 2016

On Mar 28, 2016, at 10:05 PM, Erica Sadun <erica at ericasadun.com> wrote:
>> swift-evolution is the right place for this.  As I mentioned in a different thread, I think that having a more general “relatedto:” notion would be useful to have.  There are interesting relations between methods other than mutation.  One example is the localized vs non-localized versions of string operations, etc.
> The current markup includes: attention, important, note, remark, 
> and SeeAlso, which could all theoretically convey this information.  I don't
> think RelatedTo offers a distinct advantage over the existing SeeAlso in 
> particular, as in most programming markup, SeeAlso already provides 
> cross-references to related constructs, methods, files, and URLs.

I agree SeeAlso seems sufficient.

> I am moved particularly by the recommended/recommendedOver pair in
> terms of pushing for a specific Swift keyword expansion.  Let me go
> for what I call the "Hail Dave A" defense on this one:
> * Mutating and non-mutating pairs are specifically called out in the API naming guide. 
> * They reflect a specific Swift pattern that differentiates functional implementations 
>   from their related procedural cousins.  
> * Using mutation-specific keywords avoids ambiguity that might be introduced by 
>   "let self = nonMutatingCall" patterns. These keywords support the developer in
>    both directions.
> * Using named keywords instantly identifies why the documentation is calling these items 
>   out and promoting their names, rather than promoting some  general relationship. 
> * The keywords support the expert and guide the beginner, adding value in a way RelatedTo cannot.
> I believe localized vs non-localized string operations would be better covered
> under the existing SeeAlso. Localization is not a Swift-specific pattern the way mutable 
> pairing is. While common, there is no inherent language basis for relating these methods.

I’m not really seeing this, but in any case, I think you should start a new thread.  This discussion is buried in an unrelated thread about set naming, so many possibly interested folks aren’t looking at it.


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