[ROOT] What features does TRegexp support?

From: David Faden (dfaden@iastate.edu)
Date: Wed Aug 07 2002 - 21:50:30 MEST 

Hi,
   What regular expression features does TRegexp have? The following 
expression (taken from the perldata man page) doesn't seem to work:

^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$

What parts of it might TRegexp be having a problem with? (Maybe another 
status should be added -- kWarnUnsupported -- to indicate TRegexp has 
noticed a possible use of an unsupported feature?)
   Thank you.

David

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