[swift-evolution] commas optional

[swift at lng.la]

Ahh, yeah, that does seem like a much trickier case to avoid breaking. My instinct says it's still possible to avoid, but maybe not without lots of complexity.

Jarod

On Oct 12, 2017, 16:21 -0700, Xiaodi Wu <xiaodi.wu at gmail.com>, wrote:
> On Thu, Oct 12, 2017 at 2:47 PM, Jarod Long via swift-evolution <swift-evolution at swift.org> wrote:
> > > I don't really expect this sort of syntactic sugar to be popular enough to make it through swift-evolution, and I don't think it's worth the distraction from more important priorities at this time, but for what it's worth, I've enjoyed this feature in other languages that support it. It plays a small part in making code more focused by eliminating unnecessary syntax.
> > >
> > > I could be wrong, but I'm not so sure that this would actually be source breaking. Even if you have something like this:
> > >
> > > let points = [
> > >     Point(
> > >         x: 1.0,
> > >         y: 2.0
> > >     ),
> > >     Point(
> > >         x: 3.0,
> > >         y: 4.0
> > >     )
> > > ]
> > >
> > > Proper implementation of this feature wouldn't suddenly interpret `Point(` as its own element.
> >
> > There are those of us who respect the 80-character line and break expressions across lines:
> >
> > let x = [
> >   NSVeryVeryVeryLongType
> >     .veryVeryVeryLongProperty +
> >       NSVeryVeryVeryLongType2
> >         .veryVeryVeryLongProperty2,
> > ]
> >
> > It would be a pleasant surprise if a grammar with optional commas can avoid blowing up existing code; I'm quite doubtful.
> >
> >
> > > On Oct 12, 2017, 12:23 -0700, Josh Parmenter via swift-evolution <swift-evolution at swift.org>, wrote:
> > > >
> > > >
> > > > On Oct 12, 2017, at 12:17 PM, Kelvin Ma via swift-evolution <swift-evolution at swift.org<mailto:swift-evolution at swift.org>> wrote:
> > > >
> > > > a semicolon is a purely syntactic delimiter, the comma on the other hand corresponds to physical elements in a collection. I think the two are more different than you suggest.
> > > >
> > > >
> > > > I very much agree^
> > > >
> > > > Josh
> > > >
> > > >
> > > >
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