From: Noam Postavsky <npostavs@gmail.com>
To: Ryan Thompson <rct@thompsonclan.org>
Cc: 31727@debbugs.gnu.org
Subject: bug#31727: 25.3; format-spec clobbers match data
Date: Tue, 5 Jun 2018 13:39:34 -0400 [thread overview]
Message-ID: <CAM-tV-8LN0XAXR=rt70BmX4FfK4wnnDJg=okpOvs8afhff7fnQ@mail.gmail.com> (raw)
In-Reply-To: <CAHCt_aa308mhEq1jdSaVo7iEL0hWeo9azQfqSbn_wC5Lua9gaA@mail.gmail.com>
On 5 June 2018 at 13:30, Ryan Thompson <rct@thompsonclan.org> wrote:
>
> The following code throws an error:
>
> (progn
> (string-match "h.*o" "hello")
> (format-spec "This sets the %s" (format-spec-make ?s "match data"))
> (match-string 0 "hello"))
>
> This is because the implementation of "format-spec" uses regular
> expressions internally, and does not save the match data and restore it
> afterward.
(elisp) Match Data:
Notice that all functions are allowed to overwrite the match data
unless they’re explicitly documented not to do so.
next prev parent reply other threads:[~2018-06-05 17:39 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-06-05 17:30 bug#31727: 25.3; format-spec clobbers match data Ryan Thompson
2018-06-05 17:39 ` Noam Postavsky [this message]
2018-06-05 17:49 ` Ryan Thompson
2018-06-05 22:30 ` Noam Postavsky
2018-06-06 21:30 ` Richard Stallman
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='CAM-tV-8LN0XAXR=rt70BmX4FfK4wnnDJg=okpOvs8afhff7fnQ@mail.gmail.com' \
--to=npostavs@gmail.com \
--cc=31727@debbugs.gnu.org \
--cc=rct@thompsonclan.org \
/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.