That would probably work fine, but I can’t help but feel that it would be unfortunate to have to resort to any pointer type at all in a garbage collected language that ideally wouldn’t have you bothering with such things. It would be much nicer to work with some other AbstractArray or even IO type, in my opinion. Not that that’s necessarily a valid reason not to use wrapped pointers.
As I’ve said, I don’t actually know if the use case I’ve described is nearly as universal as I think it is. I’d have to read your paper thoroughly to understand whether the use cases are similar enough that it would make sense to ask for the same solution.