Yes I've see reference to those. You can do this today though by defining the
following in Base.
setindex = nothing
delete = nothing
This would reserve the verbs, or we could do
setindex() = error("Not implemented")
I'm not sure what would be added beyond that?
Whilst in this instance I would vote for reserving the matching set of
immutable verbs in Base it does provide a concrete example where not having
shared verbs is a real issue.
One interesting fallout of reserving these would be for people new to the
language who are implementing a type. Which should they overload? My guess is
that it could end up being a mess.
