At 01:44 PM 11/24/97 -0600, Dave Wolfe wrote:
>
>Aside from the fact that if you have both zubscribe and nozubscribe
>regex lists, you already have a negation capability, Jason and I tried
>this once for the taboo regexes but ran into serious problems because
>of the implicit ORing of each regex (we didn't want to double all the
>taboo lists to accomplish negation). It's fine for a single regex, but
>it doesn't scale.
OK, thanks. I can see how more than one regexp would be a problem.
As implemented, zubscribe+nozubscribe does not cover exact negation
capabilities. The zubscribe list acts as an automatic approval rather than
a "pass-thru", so the semantics are not perfectly opposite. If I want to
say "ban everyone but mydomain", putting "mydomain" in the zubscribe list
is not the same -- it adds the address rather than falling through to
whatever policy is in effect.
There are two ways to get around this: allow negation but only if there is
one regexp, or add another flag to toggle between "auto-approve" or
"pass-thru" behavior for the zubscribe array.
This may be unnecessary -- I've only had one request for this type of
behavior, so any effort (either way) may not be warranted.
--bill
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