[zeromq-dev] conventions in bindings

[Ian Barber]

On Fri, Feb 3, 2012 at 10:20 AM, Dirkjan Ochtman <dirkjan at ochtman.nl> wrote:

> On Wed, Feb 1, 2012 at 05:17, MinRK <benjaminrk at gmail.com> wrote:
> > 2. SOCKOPT defaults
> >
> > Default values vary, and czmq makes some choices that differ from libzmq:
> >
> > * SUB sockets default to SUBSCRIBE("") instead of None
>
> I found this one a bit worrying, and if I've read the thread
> correctly, Pieter didn't respond to it (though Martin S. responded he
> thought it was a bad idea).
>

I have to say that with pub side filtering I think not having subscribe all
as a default makes even more sense - the socket shouldn't be sending a
subscribe message on creation unless you explicitly ask it to. Yes it's a
mistake that pretty much every beginner makes, but if we wanted to make
that impossible we could just throw an error if you try and do a blocking
recv() on a SUB socket that has no subscriptions whatsoever - a state I
can't think of any realistic use cases for.

Ian
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