I don't think this use case warrants a syntax change since it can already be
expressed quite elegantly with
let test: [Int]? = nil
test?.forEach { i in
print(i)
}
Maybe "in?" could be used instead of
let test: [Int?] = [0,1,nil,3]
for case let i? in test {
print(i)
}
?
> On 11 Feb 2017, at 12:48, Tino Heth via swift-evolution
> <swift-evolut...@swift.org> wrote:
>
> This one started over at swift-users, with a question on how to deal with
> looping over containers that may be nil.
>
> Imho the beauty of the feature is that it's simple enough to be explained in
> the subject line, but here is the "long" story:
>
> let test: [Int]? = nil
>
> // this is possible now
> if let test = test {
> for i in test {
> print(i)
> }
> }
>
> // how it could be written with a modified keyword
> for i in? test {
> print(i)
> }
>
> I've been thinking "in?" had been brought up long ago, but as I haven't found
> such a proposal, I probably confused it with the cancelled plan to write one
> on my own (or I just was to stupid to search ;-).
>
> Syntactic sugar like this is definitely nothing that has priority now, but
> discussing it shouldn't be a big distraction — and if it turns into a
> proposal that as well survives review, it might be even simple enough to act
> as a trigger for me to finally get my hands on some real work for Swift ;-)
>
> - Tino
> _______________________________________________
> swift-evolution mailing list
> swift-evolut...@swift.org
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