thakis added a comment.

> While the default metaclass does in fact implement the one method NSCopying 
> declares, it's not possible within the language to declare that the Class -- 
> itself, as an instance -- implements the instance methods from the NSCopying 
> protocol.

Should the compiler just know that then?

> You can fix the code just by doing `@{(id)clz : val}`, since id is freely 
> castable to anything.


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D67983/new/

https://reviews.llvm.org/D67983



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