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ultramiraculous
Nov 12, 2003

"No..."
Grimey Drawer

rjmccall posted:

It's "conditional conformances". We intended to implement it in Swift 4 and didn't quite finish. It'll probably be in 4.1.

Yeah I’ve pulled up that tracking page like every time I try to do something interesting with the type system. In the back of of my head I “know” something is possible, but then I realize I might have just done it in Scala at some point.

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