[swift-evolution] API Guideline bugs and enhancements

Daniel Steinberg daniel at dimsumthinking.com
Tue Jan 5 15:57:16 CST 2016

I agree - there are a few I'd love to see discussed.

I also agree that I appreciate that they are there and so well thought out and presented

> On Jan 5, 2016, at 4:26 PM, Paul Cantrell via swift-evolution <swift-evolution at swift.org> wrote:
> I’ll second Erica on wanting a place to discuss the API guidelines. In general, I like their general approach and philosophy — very much so! — but I also have concerns about some of the details. For example, I totally agree with Erica’s suggestion that all methods with side effects should be verbs, not just ones that mutate the receiver.
> You can read here a detailed writeup on the sticking points I hit trying to put the guidelines into practice on a real-world project:
> https://gist.github.com/pcantrell/22a6564ca7d22789315b
> The acceptance rate for Apple-guideline-recommended changes come out at only about 50%.
> I realize that guidelines are just guidelines, but that seems like a bit of an easy out if the guidelines doc is meant to help unify the style of disparate Swift libraries.
> Cheers,
> Paul
>> On Jan 5, 2016, at 2:44 PM, Erica Sadun via swift-evolution <swift-evolution at swift.org> wrote:
>> Are API Design Guideline improvement discussions in scope for the Swift Evolution list and if not, where would they go?
>> For example, the current Swift API Design Guidelines follow these rules more or less.
>> Use imperative verb phrases for mutating methods: x.reverse(), x.sort(), x.tweak()
>> Use noun phrases for non-mutating methods: x.distanceTo(...), idx.successor()
>> Seems to me the rules should actually be along the lines of:
>> Use verb phrases to declare procedural methods, whether or not they mutate an instance or just produce side effects: x.reverse(), x.sort(), x.tweak(), x.perform(), x.dispatch(), x.send()
>> Use noun phrases to describe values returned by a functional method: x.distanceTo(y), index.successor() (This admittedly leaves further issues around other functional methods, for example, seq.separatedBySequence(seq) and  int.strideTo(other: Self, step:Self.Stride), etc. )
>> Are enhancements for API Design Guidelines an area for community involvement? Where would you start a discussion about the rules? Would modifications involve formal proposals?
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