"Chris Pine" <nemo / hellotree.com> schrieb im Newsbeitrag
news:08fc01c3039c$f95514b0$6401a8c0 / MELONBALLER...
> Then I started thinking:  We have Perl-style regexps, right?  What other
> style regexps are there?  I'm sure people have come up with a number of
> different ideas, but a quick Google didn't turn up anything.  Does
anyone
> know of any other ideas?

I'd roughly classify according to these three styles

grep, sed
    () aren't meta

POSIX / egrep
    () are meta
    character classes like [:digit:], [:space:] etc.

perl / ruby
    () are meta
    character classes like \d, \s etc.
    positive and negative lookahead and lookbehind
    white space for readability
    ...

Regards

    robert