<div dir="ltr">This is a good point. I feel like calling `x` with any sort of argument labels should be prohibited. I don't think there's any expressivity penalty for doing so (especially since tuple splat is gone); plus, once a function is reified as a value (as opposed to being invoked by naming it directly), I think the most principled thing to do is to consider the argument labels "erased".<div><br></div><div>(There might be an alternate universe in which Swift's function types' argument labels are *fully* significant by disallowing conversions between function values declared with different argument labels, but Swift has never actually enforced such a requirement, and so it's probably better to just formalize the semantics as described above than vacillating on whether argument labels are significant or not.)<br><div><br></div><div>Austin</div></div></div><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Jun 30, 2016 at 11:37 AM, Sean Heber via swift-evolution <span dir="ltr"><<a href="mailto:swift-evolution@swift.org" target="_blank">swift-evolution@swift.org</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">This mostly makes sense to me and it seems like mostly a good idea, but take this example:<br>
<br>
func doSomething(x: Int, y: Int) -> Bool { return true }<br>
let x = doSomething<br>
x(10, 10)<br>
<br>
Is it then legal to do this?:<br>
<br>
x(blahblah:10, totallyOffTheWallLabelThatDoesNotAppearANYWHERE: 10)<br>
<br>
That would seem odd to me. Maybe it could be useful, but it might also be *super* confusing. I’m not sure I have a suggestion as to what to do in a situation like this - but it doesn’t seem “right” to allow it.<br>
<br>
l8r<br>
Sean<br>
<span class=""><br>
<br>
> On Jun 30, 2016, at 1:26 PM, Chris Lattner via swift-evolution <<a href="mailto:swift-evolution@swift.org">swift-evolution@swift.org</a>> wrote:<br>
><br>
> Hello Swift community,<br>
><br>
> The review of "SE-0111: Remove type system significance of function argument labels" begins now and runs through July 4. The proposal is available here:<br>
><br>
> <a href="https://github.com/apple/swift-evolution/blob/master/proposals/0111-remove-arg-label-type-significance.md" rel="noreferrer" target="_blank">https://github.com/apple/swift-evolution/blob/master/proposals/0111-remove-arg-label-type-significance.md</a><br>
><br>
> Reviews are an important part of the Swift evolution process. All reviews should be sent to the swift-evolution mailing list at<br>
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><br>
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><br>
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><br>
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><br>
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><br>
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><br>
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</blockquote></div><br></div>