From: Marcin Borkowski <mbork@mbork.pl>
To: Help Gnu Emacs mailing list <help-gnu-emacs@gnu.org>
Subject: Why looking-at-p works?
Date: Tue, 06 Mar 2018 08:57:42 +0100 [thread overview]
Message-ID: <87tvtttz49.fsf@mbork.pl> (raw)
Hi all,
(defsubst looking-at-p (regexp)
"\
Same as `looking-at' except this function does not change the match data."
(let ((inhibit-changing-match-data t))
(looking-at regexp)))
What happens is that if I make looking-at in the above code fail (e.g.,
by saying (looking-at-p 123)), inhibit-changing-match-data remains nil,
even though there is no unwind-protect here. Why does it work like
this?
TIA,
--
Marcin Borkowski
http://mbork.pl
next reply other threads:[~2018-03-06 7:57 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-06 7:57 Marcin Borkowski [this message]
2018-03-06 18:53 ` Why looking-at-p works? John Mastro
2018-03-06 20:42 ` Marcin Borkowski
2018-03-06 22:23 ` Drew Adams
2018-03-07 9:09 ` Marcin Borkowski
2018-03-07 13:06 ` Marcin Borkowski
2018-03-07 19:53 ` Eli Zaretskii
2018-03-08 4:20 ` Marcin Borkowski
2018-03-08 4:40 ` Eli Zaretskii
2018-03-08 20:33 ` Marcin Borkowski
2018-03-06 23:17 ` Nick Dokos
[not found] <mailman.10182.1520323093.27995.help-gnu-emacs@gnu.org>
2018-03-06 8:49 ` Emanuel Berg
2018-05-15 8:34 ` andlind
2018-05-15 8:49 ` tomas
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