From: Lars Ingebrigtsen <larsi@gnus.org>
To: Stefan Monnier <monnier@iro.umontreal.ca>
Cc: emacs-devel@gnu.org
Subject: Re: Ugly regexps
Date: Wed, 03 Mar 2021 14:57:12 +0100 [thread overview]
Message-ID: <87zgzkxruv.fsf@gnus.org> (raw)
In-Reply-To: <jwvk0qpjd31.fsf-monnier+emacs@gnu.org> (Stefan Monnier's message of "Tue, 02 Mar 2021 19:32:20 -0500")
Stefan Monnier <monnier@iro.umontreal.ca> writes:
> So you can do
>
> (string-match (ere "\\(def(macro|un|subst) .{1,}"))
>
> instead of
>
> (string-match "(def\\(macro\\|un\\|subst\\) .\\{1,\\}")
>
> ?
Sounds good to me. In some cases, introducing an alternative syntax can
create confusion, but I don't think that's really the case here -- I
think everybody knows this syntax, perhaps better than the Emacs regexp
syntax.
The byte compiler can do the transformation, I guess? (When it's a
string literal, which is usually is.) So there should be no performance
impact. And when Emacs finally grows support for a regexp object, then
`ere' can return one of those.
--
(domestic pets only, the antidote for overdose, milk.)
bloggy blog: http://lars.ingebrigtsen.no
prev parent reply other threads:[~2021-03-03 13:57 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-03 0:32 Ugly regexps Stefan Monnier
2021-03-03 1:32 ` Stefan Kangas
2021-03-03 2:08 ` Stefan Kangas
2021-03-03 6:19 ` Eli Zaretskii
2021-03-03 20:46 ` Alan Mackenzie
2021-03-04 18:35 ` Stefan Kangas
2021-03-03 6:00 ` Eli Zaretskii
2021-03-03 15:46 ` Stefan Monnier
2021-03-03 16:30 ` Eli Zaretskii
2021-03-03 17:44 ` Stefan Monnier
2021-03-03 18:46 ` Stefan Kangas
2021-03-03 19:21 ` Eli Zaretskii
2021-03-03 19:50 ` Stefan Kangas
2021-03-03 20:16 ` Stefan Kangas
2021-03-03 19:50 ` Stefan Kangas
2021-03-03 19:58 ` Dmitry Gutov
2021-03-03 20:07 ` [External] : " Drew Adams
2021-03-03 20:31 ` Stefan Kangas
2021-03-03 22:17 ` Drew Adams
2021-03-03 22:32 ` Stefan Monnier
2021-03-03 20:32 ` Stefan Monnier
2021-03-04 5:47 ` Eli Zaretskii
2021-03-04 10:49 ` Lars Ingebrigtsen
2021-03-04 11:25 ` Mattias Engdegård
2021-03-04 11:28 ` Alan Mackenzie
2021-03-04 14:11 ` Eli Zaretskii
2021-03-04 14:25 ` Dmitry Gutov
2021-03-04 14:50 ` tomas
2021-03-04 15:04 ` Dmitry Gutov
2021-03-05 5:45 ` Richard Stallman
2021-03-05 11:47 ` Dmitry Gutov
2021-03-06 5:11 ` Richard Stallman
2021-03-04 15:05 ` Dmitry Gutov
2021-03-04 15:11 ` Eli Zaretskii
2021-03-03 19:32 ` [External] : " Drew Adams
2021-03-03 7:09 ` Helmut Eller
2021-03-03 14:11 ` Stefan Kangas
2021-03-03 16:40 ` Stefan Monnier
2021-03-03 15:49 ` Stefan Monnier
2021-03-03 12:17 ` Dmitry Gutov
2021-03-03 15:48 ` Stefan Monnier
2021-03-03 13:57 ` Lars Ingebrigtsen [this message]
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