[zeromq-dev] subscribe/unsubscribe refcounting behaviour

[Martin Sustrik]

Jon Dyte wrote:

> yes, understood. it's not strictly needed when doing the filtering on 
> the sub side in the current implementation
> of prefix_tree, a bit would suffice there, as far as I can see.

Yes. It can be done. I can even imagine both ways of doing things: 
idempotent subscriptions as well as refcounted subscriptions. My feeling 
is that as we progress with the subscription forwarding implementation 
one option would prove as unsuitable. So let's preserve current 
semantics and see whether it holds as implementation progresses or 
whether it will have to be changed.

Martin