From: Heime <heimeborgia@protonmail.com>
To: Michael Heerdegen <michael_heerdegen@web.de>
Cc: Emacs mailing list <help-gnu-emacs@gnu.org>
Subject: Re: Shy groups and * ...eh, what?
Date: Sat, 22 Oct 2022 06:11:21 +0000 [thread overview]
Message-ID: <pxpQb0lZjJDsCyp3SgSBbfiA2n5yiNi-YHi_jc5FBPJO39wlijA81ShQ20hvSxM7_D-0XioMasb1sJShant8bgT1tmZ3Mnek4dyVCgiW954=@protonmail.com> (raw)
In-Reply-To: <87edv0mqns.fsf@web.de>
------- Original Message -------
On Saturday, October 22nd, 2022 at 4:24 AM, Michael Heerdegen <michael_heerdegen@web.de> wrote:
> Hello,
>
> I wanted to be sure I correctly understood that if you give multiple RX
> arguments to the `rx'` ' operator, they are implicitly interpreted as a
> sequence (AFAIU, that's the case. An implicit `or' would also make
> sense, that's why I wondered).
You are correct, they should be interpreted as a sequence.
> Anyway, here is what I tried:
>
> (string-match-p
> (rx bos ( "a" "b") eos)
> "a")
> ==> 0
>
>
> (string-match-p
> (rx bos (* "a" "b") eos)
> "b")
> ==> nil
>
>
> Eh - what? With evaluated `rx' forms this is (string-match-p "\\\\`\\(?:ab\\)*\\'"
> "a")
> ==> 0
>
>
> (string-match-p
> "\\`\\(?:ab\\)*\\'"
> "b")
> ==> nil
>
>
> Makes no sense to me. When I change the wrapping shy groups to normal
> groups the result makes more sense to me:
>
> (string-match-p
> "\\`\\(ab\\)*\\'"
> "a")
> ==> nil
>
>
> (string-match-p
> "\\`\\(ab\\)*\\'"
> "b")
> ==> nil
>
>
> Do I miss something or is it just a bug?
>
>
> TIA,
>
> Michael.
next prev parent reply other threads:[~2022-10-22 6:11 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-10-22 4:24 Shy groups and * ...eh, what? Michael Heerdegen
2022-10-22 6:11 ` Heime [this message]
2022-10-22 6:39 ` tomas
2022-10-23 2:47 ` Michael Heerdegen
2022-10-24 4:45 ` tomas
2022-10-24 21:01 ` Emanuel Berg
2022-10-25 3:12 ` Michael Heerdegen
2022-10-25 3:44 ` Emanuel Berg
2022-10-25 4:43 ` tomas
2022-10-22 6:49 ` Heime
2022-10-22 7:37 ` Michael Heerdegen
2022-10-22 8:34 ` tomas
2022-10-22 8:41 ` Michael Heerdegen
2022-10-22 11:12 ` Bruno Barbier
2022-10-23 2:45 ` Michael Heerdegen
2022-10-24 4:27 ` Emanuel Berg
2022-10-22 19:54 ` [External] : " Drew Adams
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
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to='pxpQb0lZjJDsCyp3SgSBbfiA2n5yiNi-YHi_jc5FBPJO39wlijA81ShQ20hvSxM7_D-0XioMasb1sJShant8bgT1tmZ3Mnek4dyVCgiW954=@protonmail.com' \
--to=heimeborgia@protonmail.com \
--cc=help-gnu-emacs@gnu.org \
--cc=michael_heerdegen@web.de \
/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 external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.