RE: [boost] regex lib: bug with sets and back ref

From: Benzinger, Ralph (ralph.benzinger_at_[hidden])
Date: 2004-04-22 04:34:52

> > The following behavior seems to be a bug:
> >
> >    * regex '([a-c]+)\1' finds 'abcabc' at offset 0 in text 'abcabc'
> 
> That looks correct.
> 
> >    * regex '([abc]+)\1' finds 'bcbc'   at offset 1 in text 'abcbc'
> 
> That looks correct.
> 
> >    * regex '([a-c]+)\1' finds nothing              in text 'abcbc'   ???
> 
> It should 'bcbc' if you're calling regex_search and nothing if you're
> calling regex_match.

Sorry if I wasn't clear enough.  All tests use regex_grep.  In the last example, however, regex_grep _doesn't_ find "bcbc", even though it should.  I would assume it's an issue with regex_compile, as the only difference between (2) and (3) is the way the set is defined.

Ralph