From: Richard Stallman <rms@gnu.org>
To: "Mattias Engdegård" <mattiase@acm.org>
Cc: rtm443x@googlemail.com, stefan@marxist.se, 41006@debbugs.gnu.org
Subject: bug#41006: 26.3; regular expressions documentation
Date: Wed, 06 May 2020 22:42:38 -0400 [thread overview]
Message-ID: <E1jWWUg-0002Bh-OO@fencepost.gnu.org> (raw)
In-Reply-To: <6F7830C9-FED5-4CE4-AAA3-45BFA0638F58@acm.org> (message from Mattias Engdegård on Tue, 5 May 2020 19:12:50 +0200)
[[[ To any NSA and FBI agents reading my email: please consider ]]]
[[[ whether defending the US Constitution against all enemies, ]]]
[[[ foreign or domestic, requires you to follow Snowden's example. ]]]
> * concatenation and alternative
> * repetition: * + ? etc
> * bracketing: \(?: ... \)
> * single-character expressions: [...] '.' \cX etc
> * zero-width assertions: ^ $ \< etc
> * capture groups and backrefs
That list could be a starting point. (What is a "capture group"?
I have no idea.)
However, I don't think alternatives are very useful without
brackets, so brackets should come before alternatives.
I think single-character expressions
should come before repetition, because the former are more basic
and conceptually simpler.
--
Dr Richard Stallman
Chief GNUisance of the GNU Project (https://gnu.org)
Founder, Free Software Foundation (https://fsf.org)
Internet Hall-of-Famer (https://internethalloffame.org)
next prev parent reply other threads:[~2020-05-07 2:42 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-01 19:06 bug#41006: 26.3; regular expressions documentation jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-05-03 3:40 ` Richard Stallman
2020-05-03 10:31 ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-05-03 13:07 ` Mattias Engdegård
2020-05-03 14:00 ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-05-03 20:08 ` Drew Adams
2020-05-03 20:31 ` Stefan Kangas
2020-05-04 1:00 ` Drew Adams
2020-05-05 2:56 ` Richard Stallman
2020-05-05 10:05 ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-05-05 16:51 ` Mattias Engdegård
2020-05-05 18:20 ` Stefan Kangas
2020-05-05 18:40 ` Drew Adams
2020-05-05 19:04 ` Stefan Kangas
2020-05-05 19:42 ` Drew Adams
2020-05-05 21:23 ` Stefan Kangas
2020-05-05 21:37 ` Drew Adams
2020-05-07 2:40 ` Richard Stallman
2020-05-09 3:48 ` Richard Stallman
2020-05-07 2:41 ` Richard Stallman
2020-05-07 3:17 ` Drew Adams
2020-05-08 2:51 ` Richard Stallman
2020-05-07 10:31 ` Stefan Kangas
2020-05-07 2:41 ` Richard Stallman
2020-05-07 3:18 ` Drew Adams
2020-05-07 10:32 ` Stefan Kangas
2020-05-08 2:49 ` Richard Stallman
2020-05-08 6:47 ` Eli Zaretskii
2020-05-08 10:10 ` Stefan Kangas
2020-05-08 10:31 ` Eli Zaretskii
2020-05-08 18:17 ` Stefan Kangas
2020-05-08 18:47 ` Eli Zaretskii
2020-05-08 20:09 ` Stefan Kangas
2020-05-08 10:04 ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-05-09 3:56 ` Richard Stallman
2020-05-08 16:49 ` Drew Adams
2020-05-09 3:53 ` Richard Stallman
2020-05-09 3:54 ` Richard Stallman
2020-05-07 2:41 ` Richard Stallman
2020-05-04 3:10 ` Richard Stallman
2020-05-04 9:13 ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-05-05 2:56 ` Richard Stallman
2020-05-05 10:02 ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-05-05 17:12 ` Mattias Engdegård
2020-05-05 17:40 ` Eli Zaretskii
2020-05-05 17:50 ` jan via Bug reports for GNU Emacs, the Swiss army knife of text editors
2020-05-05 18:09 ` Stefan Kangas
2020-05-05 18:23 ` Eli Zaretskii
2020-05-07 2:42 ` Richard Stallman [this message]
2022-04-29 12:22 ` Lars Ingebrigtsen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
List information: https://www.gnu.org/software/emacs/
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=E1jWWUg-0002Bh-OO@fencepost.gnu.org \
--to=rms@gnu.org \
--cc=41006@debbugs.gnu.org \
--cc=mattiase@acm.org \
--cc=rtm443x@googlemail.com \
--cc=stefan@marxist.se \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this public inbox
https://git.savannah.gnu.org/cgit/emacs.git
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).