[swift-evolution] Dotless case names in switch cases

[Jordan Rose]

My opinion was that there's two ways to spell this, and that we ought to steer people towards being consistent. (We actually have special code right now so that the dotless reference can still be used for exhaustive matching.)

Either it's more consistent to allow it (because it's just another expression) or it's more consistent to disallow it (because it's not how you'd write the member in any other switch, and it's only one character of difference).

Jordan


> On Jan 15, 2016, at 17:05, Jens Persson via swift-evolution <swift-evolution at swift.org> wrote:
> 
> I see, I never thought of the case names as being instance-member-like, and I thought it would be simpler to just  have one form for the switch cases (the one with a dot before the case name).
> 
> I don't want the dotless form to be removed if it complicates rather than simplifies the (compiler) code.
> 
> ( My mail was a reaction to this tweet / conversation:
> https://twitter.com/UINT_MIN/status/688101066668281856 <https://twitter.com/UINT_MIN/status/688101066668281856> )
> 
> 
> On Sat, Jan 16, 2016 at 1:42 AM, Joe Groff <jgroff at apple.com <mailto:jgroff at apple.com>> wrote:
> 
> > On Jan 15, 2016, at 2:44 PM, Jens Persson via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
> >
> > enum SomeEnum {
> >     case Foo
> >     case Bar
> >     func demoDotAndNoDot() {
> >         switch self {
> >         case .Foo: print("This has the usual dot before the case name.")
> >         case Bar: print("This has no dot, which is ok, at least in this particular context.")
> >         }
> >     }
> > }
> >
> > I'm just throwing this out in case someone should feel like writing a formal proposal to remove the dotless form.
> >
> > I'd be ok with removing it since it only works in some specific contexts.
> 
> This works by normal instance member lookup. Why do you think it should be removed?
> 
> -Joe
> 
> 
> 
> 
> -- 
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