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

[Robert Bennett]

I simply can’t see changing the syntax of such a fundamental construct, especially when a suitable replacement, which accomplishes your desired goal of introducing no new variables outside (visually) of a pair of curly braces, already exists. The language’s development is well past the stage of the cosmetics of basic syntax.

> On Jul 28, 2017, at 12:57 PM, Kwanghoon Choi <eyerama at gmail.com> wrote:
> 
> yes, swift already has forEach, but from my point of view, there is an uncomfortable part, like '(0..<10).forEach{}'. like Range type to need wrap it in parentheses for using forEach.
> 
> my suggestion is not replacing 'for in [] {}' to 'for [] {}'. Can not we have both? Of course, by erasing one before, it gave an environment to make cleaner code easier for developers like me.
> 
> 2017-07-29 1:38 GMT+09:00 Robert Bennett <rltbennett at icloud.com>:
>> Isn’t this exactly like forEach, which is already in the language?
>> 
>> > On Jul 28, 2017, at 12:32 PM, Jacob Williams via swift-evolution <swift-evolution at swift.org> wrote:
>> >
>> > 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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