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@johnmaddock.co.uk> wrote:
Hello,
As per PCRE /m modifier $ will match the pattern before any newline. However boost_regex gives back matches before
Chandan Nilange wrote: 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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