[swift-evolution] Remove AnyObject Constraint for Objective-C Lightweight Generics

Wed Nov 29 16:06:39 CST 2017

> On Nov 8, 2017, at 11:51 AM, Joe Groff <jgroff at apple.com> wrote:
> 
> In principle it makes sense, but there are implementation challenges we didn't have time to consider. It would be nice to make this happen when we have the time to make it work.

Just out of curiosity, what were some of those implementation challenges? And have any of these changed with the evolution of the standard library since then?
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