Hello, I ran into several cases when it would be desirable to add an inheritance clause B in the protocol extension A. Briefly, my proposal is that compiler should not produce an error once `extension A: B` implements all the functions of the protocol B, making it formally confirming to it. Sadly, currently, there is no elegant way to mark the conformance formally. A more detailed draft can be found here https://gist.github.com/zats/52476a83627f5e4c0a85 I would really appreciate your feedback and thoughts on this. Thank you.
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