bug#24542: closed (25.1.50; The symbol `@' and sexp scanning)

[GNU bug Tracking System]

Your message dated Fri, 12 Apr 2024 13:29:16 -0400
with message-id <jwv1q7a32y1.fsf-monnier+emacs@gnu.org>
and subject line Re: bug#24542: 25.1.50; The symbol `@' and sexp scanning
has caused the debbugs.gnu.org bug report #24542,
regarding 25.1.50; The symbol `@' and sexp scanning
to be marked as done.

(If you believe you have received this mail in error, please contact
help-debbugs@gnu.org.)


-- 
24542: https://debbugs.gnu.org/cgi/bugreport.cgi?bug=24542
GNU Bug Tracking System
Contact help-debbugs@gnu.org with problems
> --- Begin Message ---
>
>
>
> Subject: 
>
> 25.1.50; The symbol `@' and sexp scanning
>
>
>
>
> Date: 
>
> Sun, 25 Sep 2016 19:42:17 +0200
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13) Emacs/25.1.50 (gnu/linux)
>
>
>
>
> Hi,
>
> the following breaks my "el-search" package when searching in
> "skeleton.el".  It assumes that calling `scan-sexps' works at the start
> of any sexp.
>
> Recipe: in emacs -Q,
>
> insert
>
>     (eq element '@)
>
> in an elisp mode buffer (e.g. scratch).  Put point at the quote or the
> "@".  Eval
>
>     (goto-char (scan-sexps (point) 1))
>
> and you get an error like:
>
>
> Debugger entered--Lisp error: (scan-error "Containing expression ends 
> prematurely" 15 16)
>   scan-sexps(13 1)
>   (goto-char (scan-sexps (point) 1))
>   eval((goto-char (scan-sexps (point) 1)) nil)
>   eval-expression((goto-char (scan-sexps (point) 1)) nil)
>   funcall-interactively(eval-expression (goto-char (scan-sexps (point) 1)) nil)
>   call-interactively(eval-expression nil nil)
>   command-execute(eval-expression)
>
>
> I think `scan-sexps' should not error.  FWIW, if I add one more sexp to
> the list after "'@" (different from "'@"), there is no error.
>
>
> TIA,
>
> Michael.
>
>
>
>
> In GNU Emacs 25.1.50.2 (x86_64-pc-linux-gnu, GTK+ Version 3.21.5)
>  of 2016-09-23 built on drachen
> Repository revision: 14c36d76df035faa127580d706a0564f4e496991
> Windowing system distributor 'The X.Org Foundation', version 11.0.11804000
> System Description:     Debian GNU/Linux testing (stretch)
>
> Configured features:
> XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GSETTINGS NOTIFY
> LIBXML2 FREETYPE XFT ZLIB TOOLKIT_SCROLL_BARS GTK3 X11
>
> Important settings:
>   value of $LC_ALL: de_DE.utf8
>   value of $LC_COLLATE: C
>   value of $LC_TIME: C
>   value of $LANG: de_DE.utf8
>   locale-coding-system: utf-8-unix
>
> Major mode: Emacs-Lisp
>
>
>
>
> --- End Message ---
> --- Begin Message ---
>
>
>
> Subject: 
>
> Re: bug#24542: 25.1.50; The symbol `@' and sexp scanning
>
>
>
>
> Date: 
>
> Fri, 12 Apr 2024 13:29:16 -0400
>
>
>
>
> User-agent: 
>
> Gnus/5.13 (Gnus v5.13)
>
>
>
>
> >>  (defvar emacs-lisp-mode-syntax-table
> >>    (let ((table (make-syntax-table lisp-data-mode-syntax-table)))
> >> -    ;; These are redundant, now.
> >> -    ;;(modify-syntax-entry ?\[ "(]  " table)
> >> -    ;;(modify-syntax-entry ?\] ")[  " table)
> >> +    ;; `syntax-propertize'. takes care of `,@'.
> >> +    (modify-syntax-entry ?@ "_" table)
> >>      table)
> >>    "Syntax table used in `emacs-lisp-mode'.")
> >
> > This seems to give good results for me - so far at least.
>
> Thanks, pushed to `master`, closing.
>
>
>         Stefan
>
>
>
> --- End Message ---