[swift-evolution] [Draft Proposal] Improve protocol inheritance behaviour

[Dale Buckley]

So I did consider using the 'override' keyword, but it then raised the
question as to what should happen when 'super' is called.

I agree that by adding 'override' it makes it more obvious that you are
overriding an existing implementation of the method, regardless of if it's
defined in the class you are inheriting from or from the protocol
extension. But if you add 'override' you are explicitly saying you can call
the super implementation.

So the question is what should happen here? Realistically you could expect
calling 'super' would call the protocol extension implementation of the
method, but I'm trying to think of the problems that could occur if its
implemented in that way.

Any thoughts on this?

Dale
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