[swift-evolution] [Pitch] Improving KeyPath

[Joe Groff]

> On Aug 25, 2017, at 1:45 PM, Eagle Offshore <eagleoffshore at me.com> wrote:
> 
> 
>> On Aug 25, 2017, at 1:35 PM, Joe Groff <jgroff at apple.com <mailto:jgroff at apple.com>> wrote:
>> 
>> What do you mean exactly by traits? That's an overloaded term.
> 
> 
> http://scg.unibe.ch/archive/papers/Scha03aTraits.pdf <http://scg.unibe.ch/archive/papers/Scha03aTraits.pdf>
> 
> Like PHP or Pharo traits.  Like a protocol that has a default implementation that comes along with it.

OK. Swift already has protocol extensions, which let you provide default implementations alongside protocols.

-Joe

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