Don't keep complicating the syntax (soft post, maybe off topic, maybe irrelevant)

[newpavlov]

@CAD97

I think the addition of &out <..> is very heavy on the semantic side, and weighs heavily on the language’s complexity budget.

I would like to disagree with you here. I think that &out (write-only) is a logical addition to &mut (read+write) and & (read-only). We could wish for a more consistent naming (e.g. something like &r, &rw, &w), but this ship has already sailed.