Hi, On 23 Aug 2010, at 12:51, chrisk-free...@list.mightyreason.com wrote:
> [...]The hardest part of POSIX regular expressions is in picking out the > correct captured subexpressions. This makes programs like "sed" > vulnerable to the bad regex.h engine that comes with the operating system. > > Luckily grep does not need the captured subexpressions, and thus does > not need the complexity that comes from the ideas behind TRE. [etc] I think grep does potentially need the captured subexpressions, for eg: \([abc]\)99\1 matching eg b99b -- Bob Bishop r...@gid.co.uk _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
