From: Alan Wehmann <wehmann@fnal.gov>
Subject: Re: match-string debugging problem
Date: Sun, 13 Mar 2005 15:52:24 -0600 [thread overview]
Message-ID: <v0xvf7vz013.fsf@fsui03.fnal.gov> (raw)
In-Reply-To: mailman.3303.1110470311.32256.help-gnu-emacs@gnu.org
Stephen Berman <Stephen.Berman@gmx.net> writes:
> There seems to be something about match-string that I don't
> understand. Here is an example of the kind of code I'm working with:
>
> (defvar mystring1 "+++++ ")
> (defvar mystring2 " ~~~~~")
> (defun mystring-list ()
> (interactive)
> (with-current-buffer (get-buffer-create "*test*")
> (switch-to-buffer "*test*")
> (dotimes (num 5)
> (insert mystring1 "test" (int-to-string (1+ num)) mystring2 "\n"))
> (goto-char (point-min))
> (let ((mystring-list ()))
> (while (re-search-forward
> (concat "^" (regexp-quote mystring1) "\\(.+\\)"
> (regexp-quote mystring2) "$")
> (point-max) t)
> (setq mystring-list (append (list (match-string 1)) mystring-list)))
> (insert "\n")
> (setq mystring-list (reverse mystring-list))
> (dolist (elt mystring-list)
> (insert elt " ")))))
>
> After evalling this code and typing `M-x mystring-list', buffer *test*
> consists of these lines:
>
> +++++ test1 ~~~~~
> +++++ test2 ~~~~~
> +++++ test3 ~~~~~
> +++++ test4 ~~~~~
> +++++ test5 ~~~~~
> test1 test2 test3 test4 test5
>
> The last line indicates that match-string correctly matches the
> strings that build mystring-list. But when I step through the code
> with edebug, match-string always returns nil and a wrong-type-argument
> error is raised at the insert (since nil is not char-or-string-p).
> (Edebug isn't the problem: evalling first the regexp search code in
> *test* and then (match-string 1) also returns nil.) Because of this
> I'm having a hard time debugging other code that uses match-string.
> Can someone explain what's going on?
>
> Steve Berman
>
>
>
I tried your example, with
GNU Emacs 21.2.2 (sparc-sun-solaris2.8, X toolkit) of 2005-02-10 on
gax
and also with
XEmacs 21.4 (patch 15) "Security Through Obscurity" [Lucid]
(sparc-sun-solaris2.8, Mule) of Fri Feb 11 2005 on gax
When I put a breakpoint in Edebug after
(match-string 1)
I get the strings I expect to see. Also, a breakpoint after 'elt' in
(insert elt " ")
behaves as I would expect & not as you describe.
--
Alan Wehmann
wehmann(removespam)@fnal.gov
next prev parent reply other threads:[~2005-03-13 21:52 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <mailman.3303.1110470311.32256.help-gnu-emacs@gnu.org>
2005-03-10 17:06 ` match-string debugging problem Pascal Bourguignon
2005-03-10 22:27 ` Stephen Berman
[not found] ` <mailman.3372.1110495427.32256.help-gnu-emacs@gnu.org>
2005-03-10 23:40 ` Pascal Bourguignon
2005-03-11 22:18 ` Stephen Berman
2005-03-13 21:52 ` Alan Wehmann [this message]
2005-03-14 19:32 ` Stephen Berman
2005-03-10 15:18 Stephen Berman
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=v0xvf7vz013.fsf@fsui03.fnal.gov \
--to=wehmann@fnal.gov \
/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.