Why wrapping optional existential in parenthesis?

[vanvoorden (Rick van Voorden)]

Is there any way to return a *type* (not an *instance*) as an opaque type?

(some PublicProtocol).Type @Slava_Pestov Ohh… wow! That's what I was looking for this whole time! public var PublicType: some PublicProtocol.Type { return PrivateStruct.self } This code never worked… and this whole time it's because I was missing the round braces! Ahh… good to know! Thanks!

I ran into something similar looking for a way to express:

some OrderDetailsDelegate.Type

The right way (for now) to do this is:

(some OrderDetailsDelegate).Type

But in theory Swift could one day compile that without the round braces (unless there is actually a legit use-case I'm not thinking of for that syntax without round braces that currently means something distinct that needs to be supported).