[swift-users] Dealing with loss of observers on protocol properties with default implementations

[Tino Heth]

> I find this to be an ugly solution. Particularly so since non-objc protocols don't support optional members. Compare this to using a base class:

If inheritance works well, I wouldn't insist on protocols just for the sake of it.
This wont help with structs, but your example uses a class… and if you can't use inheritance for other reasons, you could try composition instead.
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