[swift-evolution] [Discussion] Can we make `.Type` Hashable?

Keith Smiley k at keith.so
Fri Jul 1 12:57:56 CDT 2016


This would be great. I've solved this recently by making a TypeRepresentation
type that is initialized with any T, and conforms to Hashable. Of course
internally this just uses String(T), but at least that's abstracted from the
caller.

--
Keith Smiley

On 07/01, Matthew Johnson via swift-evolution wrote:
> +1 here as well.  It would be nice to have.
> 
> 
> > On Jul 1, 2016, at 9:15 AM, Sean Heber via swift-evolution <swift-evolution at swift.org> wrote:
> > 
> > +1 here, too. Looking like someone needs to write a full proposal! :P
> > 
> > l8r
> > Sean
> > 
> > 
> >> On Jul 1, 2016, at 9:11 AM, Tony Allevato via swift-evolution <swift-evolution at swift.org> wrote:
> >> 
> >> +1. I've had to do this a couple times and ended up wrapping them in string interpolations, which makes me feel terrible.
> >> 
> >> On Fri, Jul 1, 2016 at 6:26 AM David Sweeris via swift-evolution <swift-evolution at swift.org> wrote:
> >> +1
> >> 
> >>> On Jul 1, 2016, at 8:20 AM, Adrian Zubarev via swift-evolution <swift-evolution at swift.org> wrote:
> >>> 
> >>> Additive question:
> >>> 
> >>> 	• Can a type instance of a type SomeType.self SomeType.Type be Hashable?
> >>> I really would want to use these in dictionaries or sets :)
> >>> 
> >>> [Any.Type: ValueType]
> >>> 
> >>> Set<Any.Type> // Union type universe
> >>> 
> >>> 
> >>> 
> >>> 
> >>> -- 
> >>> Adrian Zubarev
> >>> Sent with Airmail
> >>> 
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