Hi,
On Thu, Jun 25, 2009 at 2:17 PM, Alex Grässerpyropunk51@gmail.com wrote:
Thank you very much for Regex Coach. It has helped tremendously!
You're welcome... :)
Recently I needed to use a negative look-behind with multiple exclusions and found that Regex Coach does not support variable length look-behind.
\[^\]*(?<!(tmp|files))$
gives an error that "Variable length look-behind not implemented (yet)"
whereas
\[^\]*(?<!(tmp|les))$
works, except that it excludes more than required.
Interestingly WinMerge also has this restriction ;-)
Most regex engines have this restriction. In fact, I don't know any offhand that don't. (But I'm not an expert.)
Having said that, I don't have plans to implement variable-length look-behind anytime soon. Sorry if the "yet" part seems to imply otherwise.
Cheers, Edi.