From: Chandan Nilange (chandan_nilange_at_[hidden])
Date: 2007-09-03 03:45:58
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.
Regards,
Chandan
--- John Maddock <john_at_[hidden]> wrote:
> Chandan Nilange wrote:
> >> Hello,
> >>
> >> As per PCRE /m modifier $ will match the pattern
> before any newline.
> >> However boost_regex gives back matches before
> formfeed(\x0c) &
> >> CarriagReturn(\x0d) Same is observed for ^ i.e
> match after newline.
>
> Yes, it regards any "vertical whitespace" as being
> suitable for a $ or ^
> match: however if you have a \r\n sequence, then it
> will *not* match in the
> middle of that sequence.
>
> I do recall extending the list of characters that
> will form a line boundary
> recently, but not whether it was for Perl or Unicode
> compatibility :-(
>
> Ah, here we are:
>
http://unicode.org/unicode/reports/tr18/#Line_Boundaries,
>
> remember that all the sequences given really do
> indicate a line boundary in
> most cases.
>
> John.
>
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