[swift-evolution] [Review] SE-0023 API Design Guidelines

Erica Sadun erica at ericasadun.com
Fri Jan 22 16:10:53 CST 2016


Current:
Use imperative verb phrases for mutating methods: x.reverse(), x.sort(), x.tweak()
Use noun phrases for non-mutating methods: x.distanceTo(...), idx.successor()
Proposed:
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. )
I suggest that mutating methods are just a procedural method (side effect, no return value) vs functional.

-- E


> On Jan 22, 2016, at 2:02 PM, Douglas Gregor via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Hello Swift community,
> 
> The review of SE-0023"API Design Guidelines" begins now and runs through January 31, 2016. The proposal is available here:
> 
> https://github.com/apple/swift-evolution/blob/master/proposals/0023-api-guidelines.md <https://github.com/apple/swift-evolution/blob/master/proposals/0023-api-guidelines.md>
> Reviews are an important part of the Swift evolution process. All reviews should be sent to the swift-evolution mailing list at
> 
> https://lists.swift.org/mailman/listinfo/swift-evolution <https://lists.swift.org/mailman/listinfo/swift-evolution>
> or, if you would like to keep your feedback private, directly to the review manager. When replying, please try to keep the proposal link at the top of the message:
> 
> Proposal link:
> 
> https://github.com/apple/swift-evolution/blob/master/proposals/0023-api-guidelines.md <https://github.com/apple/swift-evolution/blob/master/proposals/0023-api-guidelines.md>
> Reply text
> 
> Other replies
>  <https://github.com/apple/swift-evolution#what-goes-into-a-review-1>What goes into a review?
> 
> The goal of the review process is to improve the proposal under review through constructive criticism and, eventually, determine the direction of Swift. When writing your review, here are some questions you might want to answer in your review:
> 
> What is your evaluation of the proposal?
> Is the problem being addressed significant enough to warrant a change to Swift?
> Does this proposal fit well with the feel and direction of Swift?
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> 
> https://github.com/apple/swift-evolution/blob/master/process.md <https://github.com/apple/swift-evolution/blob/master/process.md>
> Thank you,
> 
> -Doug Gregor
> 
> Review Manager
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