On Thu, 19 May 2005, Matthew Boehm wrote:
> Hugh L. Johnson wrote:
> > Does ^ work as a NOT in an expression for extensions?
> > Are the following equivalent?
> >
> > exten => _58[^389],1,dial(${${EXTEN}},${RINGLONG},tr)
> >
> > exten => _58[0124567],1,dial(${${EXTEN}},${RINGLONG},tr)
>
> Not sure which RegEx book you read but ^ (caret) stands for "line beginning"
> not "don't match".
Not inside a square bracket it doesn't. There a caret normally means
"invert the set" if it is in the first position. See e.g. "man grep" or
just about any other text describing standard regexps.
>From reading pbx.c (EXTENSION_MATCH_CORE) it seems that asterisk does not
implement the inverted set inside []. That is ok, I guess, since the
regexps in Asterisk are among the most nonstandard ones anyone has ever
seen. :-)
Peter
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