--- Comment #2 from Magnus Lie Hetland <> 2012-02-27 00:44:59 
PST ---
It did exist in the previous version -- my code broke with the new regexp
engine, but worked before :-)

If this is a conscious choice, then that's totally fine by me. Special cases
aren't the right way to go when the general mechanism works. I had some trouble
getting this to work (did something like what you wrote here, which won't work
-- but double-escaping does, of course), so I ended up with using the
or-operator, which was kind of hackish ;-)

So, yeah, I guess I "retract" my bug report :->

As for other languages: Yeah, I think this is pretty common. E.g., Python
( and in Perl and Perl-compatible
regexps, as used in all kinds of places, such as PHP, Apache, Safari, …

So I think the "place member end brackets as first character" is the "industry
standard" behavior.

But as a compromise: Perhaps a useful error message pointing out the escape
thing could be added? Or it could be explicitly pointed out in a note in the
documentation (to avoid special-casing the error code)?

I think some kind of "least surprise" handling for people coming from basically
anywhere else might be useful ;-)

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