On 02/06/2010 09:51:04 PM Sat, Karl O. Pinc wrote:
On 02/05/2010 08:23:50 PM, Peter Bloomfield wrote:
>
> On 02/03/2010 01:08:00 PM Wed, Karl O. Pinc wrote:
> > I want to turn off balsa's colorization and
> > change bars and other frobbing of quoted text.
> > Setting the regexp to the empty string
> > _should_ do this, but does not.
>
> Yes, it should--instead it runs afoul of a quirk? feature? in
> regexec,
> where an empty regex matches zero characters, and keeps checking
> forever...fixed in git master.
FYI FWIW.
The posix spec (
http://www.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html
Section 9.1, first sentence of "matched" sub-section)
implies that the behavior is correct.
But the GNU project in man 7 regex says the spec is
fuzzy and this aspect is non-portable.
Thanks for the reference! Yes, I see now, it's clear that a regex can match
zero characters--Balsa's code simply failed in that case. Since we're looking
for a leading string that indicates quoting, which requires at least one
character, that's essentially a failed match, and that's how Balsa reacts with
the fix I mentioned.
Best,
Peter
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