Re: [Boost-users] [regex] Why pattern anchored at buffer end ($)alsomatch for (\x0c)FF, (\x0d)CR

From: John Maddock (john_at_[hidden])
Date: 2007-09-03 07:38:37

Chandan Nilange wrote:
> Hello John,
>
> I not very clear.
>
> So do you mean that -
>
> $ & ^ matching pattern after/before any  (\x0c)FF,
> (\x0d)CR is right PCRE /m modifier behaviour.

I believe so, but deciding what the right behaviour should be is not 
necessarily easy: Perl has the luxury that it controls File IO as well as 
regexes: in contrast Boost.Regex is designed to accept text from all kinds 
of sources and platforms.  Most applications will in any case regard an 
isolated \r or \n as a line break, as well as \r\n.  Likewise in what sense 
does a form-feed *not* start a new line? :-)

HTH, John.