[swift-evolution] Method cascading (was Re: Request for Discussion: Setup closures)

[Erica Sadun]

Joe Groff pointed out that a leading . was syntactically ambiguous. From 7 December 2015:

> Note that using leading '.' is syntactically ambiguous. The above already parses as `.thing = 42.otherThing("meaning of life")` (or would, if we didn't already ban statements from starting with '.' for exactly this reason).
> 
> -Joe


-- E


> On Dec 14, 2015, at 2:02 AM, Jacob Bandes-Storch via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Would .{} be a special syntax in the grammar, or an instance of a custom operator taking advantage of some more generic self-rebinding? Would you be able to write a custom function taking such a block and applying it later (à la instance_eval <http://ruby-doc.org/core-2.2.0/BasicObject.html#method-i-instance_eval <http://ruby-doc.org/core-2.2.0/BasicObject.html#method-i-instance_eval>>)?
> 
> Jacob
> 
> On Mon, Dec 14, 2015 at 12:03 AM, Pierre Monod-Broca via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
> +1, the .{} syntax is nice
> 
> Pierre
> 
> > Le 11 déc. 2015 à 18:05, Kenny Leung via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> a écrit :
> >
> > I’m all for this, but couldn’t it be done without the “with”? It doesn’t seem to make the code read any easier.
> >
> > This
> >
> >    myObject {
> >        this = that
> >        here = there
> >    }
> >
> > could unambiguously indicate that you want method cascading.
> >
> > Or even
> >
> >    myObject.{
> >        this = that
> >        here = there
> >    }
> >
> > which has a relationship to the current method invocation syntax.
> >
> > -Kenny
> >
> >
> >> On Dec 9, 2015, at 9:47 AM, Erica Sadun via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
> >>
> >> Here you go:  https://bugs.swift.org/browse/SR-160 <https://bugs.swift.org/browse/SR-160>
> >>
> >> Let me also point you to this:  https://gist.github.com/erica/6794d48d917e2084d6ed <https://gist.github.com/erica/6794d48d917e2084d6ed> because
> >>
> >> * It is pretty
> >> * I put a lot of effort into it, following the "social" request in the current process document, etc
> >> * I want to publicly shower props on Sean Heber, who showed great patience, insight, and kindness helping out on this
> >>
> >> I'd appreciate any advice you could share on determining which tool to use when you have a Swift enhancement idea
> >>
> >> -- E
> >>
> >>
> >>> On Dec 8, 2015, at 10:16 PM, Chris Lattner <clattner at apple.com <mailto:clattner at apple.com>> wrote:
> >>>
> >>>
> >>>> On Dec 7, 2015, at 4:46 PM, Erica Sadun via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
> >>>>
> >>>> Noted. Since an updated proposal is all but ready, could we please have a Swift 4 proposal daycare folder to stick it in, so it doesn't get lost or forgotten?
> >>>
> >>> Personally, I’d rather use bugs.swift.org <http://bugs.swift.org/> for feature requests like this.  It is lighter weight, allows commenting, etc.
> >>>
> >>> -Chris
> >>>
> >>
> >>
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> >
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> 
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