[swift-evolution] [Discussion] Removing tuple labels from the type signature

Ondrej Barina obarina at gmail.com
Fri Feb 5 00:47:27 CST 2016


-1 for proposal. Current behavior is fine. There is no need to change it
Ondrej b.
On Feb 5, 2016 12:56 AM, "Chris Lattner via swift-evolution" <
swift-evolution at swift.org> wrote:

>
> > On Feb 4, 2016, at 3:26 PM, Maximilian Hünenberger <
> m.huenenberger at me.com> wrote:
> >
> > Is this behavior intended?
> >
> > What disadvantage do I have if a conversion from (a: Int, b: Int) to (x:
> Int, y: Int) is allowed?
>
> If that were allowed, then it also stands to reason that a conversion from
> “(a: Int, b : Int)” to “(b: Int, a : Int)” would also work… but would not
> swap the elements.  IMO, it is best to disallow things misleading things
> like this.
>
> -Chris
>
> >
> >
> > Thank you for clarification
> > - Maximilian
> >
> >> Am 05.02.2016 um 00:11 schrieb Chris Lattner <clattner at apple.com>:
> >>
> >>
> >>> On Feb 4, 2016, at 10:57 AM, Maximilian Hünenberger <
> m.huenenberger at me.com> wrote:
> >>>
> >>> Is there a reasoning behind treating (Int, Int) and (lhs: Int, rhs:
> Int) as separate types?
> >>
> >> I’m not sure what you mean by “separate types”.  One has labels, one
> does not, so they are clearly separate.
> >>
> >> Further, "(Int, Int)” needs to be compatible/convertible to "(a : Int,
> b : Int)”, but “(a : Int, b : Int)” should not be convertible to “(x : Int,
> y : Int)”.
> >>
> >>> Is there a connection to your tuple splat proposal?
> >>
> >> No connection at all.
> >>
> >> -Chris
> >>
> >
>
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