[swift-evolution] [Proposal] Automating Partial Application via Wildcards

[Joe Groff]

> On Feb 2, 2016, at 11:12 AM, Austin Zheng via swift-evolution <swift-evolution at swift.org> wrote:
> 
> Hmm...the rationale that Joe provided makes a lot of sense.
> 
> One question - is the explicit closure syntax amenable to multiple levels of currying? In particular, what are the scoping rules for the placeholders $n - are they limited to the immediate closure within which they appear, or can they be used within further-nested closures?

Currently, they're always scoped to the immediate closure, so you need to use explicit named parameters if you want to nest closures.

-Joe

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