[swift-evolution] Change 'for in' expression to for [] { (item) in ... }

[Jacob Williams]

This change would also make it so that for loops follow the same format as all other closures with variables.

The downside is that this would break a TON of code. I don’t think that the amount of code this breaks would be worth the consistency. And as Alex mentioned, it is possible through .forEach


> On Jul 28, 2017, at 10:19 AM, Kwanghoon Choi via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Hello
> 
> I found someone easy mistake using for in loop statement.
> 
> Ex)
> var i = 0
> for i in 0..<10 { }
> print(i)
> 
> And this user expected print(i) is “10”
> 
> Many experienced swift developers doesn’t misunderstand like this. But always someone is new comers, and I think this expression make misunderstand easy too.
> 
> So why not like this?
> 
> var I = 0
> for 0..<10 { (i) in … }
> 
> I think this is more understandable for loop expression. 
> 
> Best Regards
> 
> - Jay Choi
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