[Boost-users] Lookbehind assertions problem with 1.33

From: Gregory Nisnevich (gregnis_at_[hidden])
Date: 2005-07-14 13:07:31

I'm trying to use lookbehind assertions, and here's a problem: the 
following syntax

(?<=^.{2}).{4}

gives me the error:

'(?<=^.{2}).{4}' is a bad regular expression: Unmatched [ or [^

while the following works:

(?<=^..).{4}

matching, as I expected, 4 characters after the first 2 characters
in a line. 

Shouldn't the above two regexes work the same way?

Thanks,

-Gregory

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