Regex: How should backreferences contained in the capturing match they reference to work?
liorean at gmail.com
Fri Sep 14 13:19:50 PDT 2007
On 14/09/2007, Brendan Eich <brendan at mozilla.org> wrote:
> "Almost all" excludes IE JScript, right?
Well, it doesn't agree with me on what is the right approach, but it
does agree with me that the ES3 approach is wrong.
> Those implementations are
The only implementations that I know of that specifically implement
the ES3 algorithms are those in SpiderMonkey, linear_b and futhark (I
have no idea about SEE, Rhino, and a lot of other fringe JS engines
however). And the ES4 refimpl I guess.
I only said "almost all" because I haven't tested each and every one.
It could be possible that the only ones behaving according to the ES3
algorithm *at all* are indeed those written to match the ES3
algorithms. It's also possible that there are those that do match the
ES3 algorithms but are not written specifically for them - I just
don't know of any such implementation.
for the ES3 algorithms.
The JScript one is shared with at least VBScript, and I wouldn't be
surprised if it was shared with VB, VBA and other COM environments as
well. I don't think it's written specifically for the ES3 algorithms.
It's peculiar, and I think it doesn't agree with anybody else on a few
edge cases besides those I've brought up.
> Again, it's the Perl connection.
Not only. Both Perl and those POSIX flavour regex that implement
David "liorean" Andersson
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