Yes to both. IMO, there’s nothing inherently wrong with having an enum scoped to a class apart from that makes it impossible to forward declare. If there was some language supported mechanism to forward-declare class-scoped enums, we’d probably just do that instead. So, this pattern of declaring the enum outside of a class and pulling it into the class with a using declaration is a bit ugly, insofar as it pollutes the global namespace, but it does allow you to continue to use the type as if it were file scoped.

-Jer