[swift-evolution] [Review] SE-0105: Removing Where Clauses from For-In Loops

[Patrick Smith]

Yes, I’m all for removing this syntax which seems to confuse people with what it actually does. Having to write more explicit code with a `guard` or `.filter` is better than people unexpectedly creating bugs.

I’d say remove it for Swift 3, allowing a potential replacement for this functionality to be an addition and not a breaking change. It’s kind of like pruning a tree back to prepare it for new growth.

(I like Xiaodi’s suggestion of replacing `where` with `if`, but I imagine that would be a separate proposal, but interested in hear other’s thoughts on it, although I’ve probably missed some in the discussion.)

Patrick

> On 23 Jun 2016, at 2:12 PM, Chris Lattner via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Hello Swift community,
> 
> The review of "SE-0105: Removing Where Clauses from For-In Loops" begins now and runs through June 29. The proposal is available here:
> 
> 	https://github.com/apple/swift-evolution/blob/master/proposals/0105-remove-where-from-forin-loops.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
> 
> or, if you would like to keep your feedback private, directly to the review manager.
> 
> What goes into a review?
> 
> The goal of the review process is to improve the proposal under review through constructive criticism and contribute to 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?
> 	* If you have used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?
> 	* How much effort did you put into your review? A glance, a quick reading, or an in-depth study?
> 
> More information about the Swift evolution process is available at
> 
> 	https://github.com/apple/swift-evolution/blob/master/process.md
> 
> Thank you,
> 
> -Chris Lattner
> Review Manager
> 
> 
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