Re: Standard Queue status

["Mark Lundquist" <up.yerz@nospam.com>]

"Jeffrey Carter" <jeffrey.carter@boeing.com> wrote in message
news:3C065B15.5CA7D10B@boeing.com...
> Mats Karlssohn wrote:
> >
> > Yes, the use of "Direction" is elegant, and converting to and from
> > unbounded arrays seems useful.
>
> I don't know. Specifying the direction seems like control coupling.

I don't think it really is control coupling.  The semantics of Direction are
defined independently from any implementation issues.  Direction is a
legitimate part of the abstraction in this case (I'm not saying I think it's
necessarily the best design).

The litmus test is, "What dependencies does it set up that you don't like?"
If it doesn't create any dependencies, then it's not coupling.  Another way
to look at it: if the approach gives you no more and no less than having two
variants (forward and reverse) for each operation, then how is one approach
any more "control coupled" than the other?

-- mark