[swift-evolution] [Pitch] Make the first parameter in a function declaration follow the same rules as the others

Tanner Nelson me at tanner.xyz
Wed Mar 9 14:35:12 CST 2016

I would agree that in following the Swift.org API Design Guidelines I've had to do a lot of `func foo(x x: Type)`.

But simple functions like `.remove(element)` or `.append(element)` that really don't need labels are ubiquitous and would need to be changed to `_ x:`. 

I assume the goal is to have the default case be whatever developers will use most commonly. 

> On Mar 9, 2016, at 3:15 PM, Jose Cheyo Jimenez via swift-evolution <swift-evolution at swift.org> wrote:
> +1 Yes
> the current solution makes me wish we still have the # from swift 1 ;)
> 	func foo(x x: Int, y: Int) // Swift 2
> 	func foo(#x: Int, y: Int) // Swift 1
>> On Mar 9, 2016, at 10:58 AM, Joe Groff via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> Our accepted naming guidelines have embraced first argument labels for functions and methods. This weakens our justification for making the first parameter declaration in a `func` declaration behave differently from the others, implicitly being unlabeled. It seems pretty clear to me we should make all of the parameter declarations behave uniformly:
>> func foo(x: Int, y: Int) // Should declare foo(x:y:), instead of foo(_:y:)
>> func foo(_ x: Int, y: Int) // Explicitly declares foo(_:y:)
>> This would also make `init` and `func` parameters behave consistently, which is nice. There may still be hope for our keyword argument rules to one day be shorter than the Smalltalk spec…
>> -Joe
>> _______________________________________________
>> swift-evolution mailing list
>> swift-evolution at swift.org <mailto:swift-evolution at swift.org>
>> https://lists.swift.org/mailman/listinfo/swift-evolution
> _______________________________________________
> swift-evolution mailing list
> swift-evolution at swift.org
> https://lists.swift.org/mailman/listinfo/swift-evolution

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.swift.org/pipermail/swift-evolution/attachments/20160309/17c4c34c/attachment.html>

More information about the swift-evolution mailing list