[asterisk-dev] Better pattern matching

Clod Patry cpatry at gmail.com
Wed Aug 1 14:15:40 CDT 2007


you probably are searching for RFC 2705 ?

That would be great if Asterisk could support that kind of
digitmaps/patterns.


On 8/1/07, Jared Smith <jsmith at digium.com> wrote:
>
> On Wed, 2007-08-01 at 11:44 -0500, John Lange wrote:
> > Searching the archives I can see that better pattern matching has been
> > discussed a number of times.
> >
> > There have even been patches submitted and discussions about how there
> > are regexp libraries available under BSD style license that could be
> > incorporated into Asterisk.
> >
> > Yet, nothing ever makes it into the released code.
>
> Yes, I've been one of the people who have been more vocal than most
> about this.  I really think it's a good idea to be a little more
> flexible in our pattern matching ability.  That being said, I can see
> where the Asterisk developers are coming from too -- they're worried
> that this will severely impact the time it takes for Asterisk to do
> pattern matching.  The current pattern matching syntax works fairly well
> for numeric extensions, but is pretty difficult work with if you trying
> to do pattern matching on names or alphanumeric extensions.  For
> example, try coming up with a pattern match that'll match the name Nancy
> (either upper or lower case) followed by two digits.  It becomes even
> more difficult when dealing with letters that fall outside the English
> alphabet.
>
> While I personally think regular expressions are a pretty cool idea, I
> know not everyone is sold on them.  If I remember correctly, there's
> even an RFC with a very complete pattern matching syntax defined (which
> I can't find right now, of course).
>
> Hopefully, one of the Asterisk developers will stumble across this post
> and take pity on us and help us out!
>
>
> --
> Jared Smith
> Community Relations Manager
> Digium, Inc.
>
>
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-- 
Clod Patry
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