[swift-evolution] [Pitch] Improving capturing semantics of local functions

[Chris Lattner]

> On Nov 12, 2017, at 8:52 PM, Slava Pestov via swift-evolution <swift-evolution at swift.org> wrote:
> 
> 
> func fn<T>(param: T) throws -> T where T : Equatable [foo, bar] { … }

+1, potentially adding a context sensitive keyword like “capturing” before it.

> I think #4 is ambiguous with array literals unfortunately.
> 
> Perhaps this proposal should be split in two — the ‘self.’/escaping part is source breaking, and will likely require more discussion. Adding capture lists to local functions seems like a more straightforward change.

+1.

-Chris

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