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bug#11982: 24.1.50; (Contains ERT Test) show-paren-mode doesn't work in
From: |
Rolando Pereira |
Subject: |
bug#11982: 24.1.50; (Contains ERT Test) show-paren-mode doesn't work in C comments if there's a quote between the parenthesis (affects c-mode and modes derived from it) |
Date: |
Wed, 18 Jul 2012 21:16:17 +0100 |
In c-mode if you type the following comment with M-x show-paren-mode
activated, the closing parenthesis is highlighted correctly:
// Lorem ipsum (dolor sit amet)
However, if the ' character appears inside the parenthesis, then
show-paren-mode won't match them.
For example, when typing the following comment, show-paren-mode highlights
the closing parenthesis using show-paren-mismatch:
// Comments are good (aren't they?)
I tried to make an ERT test that would check if the parenthesis was
highlighted correctly, but I couldn't get the overlay that
show-paren-mode uses.
However I found out that forward-sexp also doesn't work when the '
character appears between parenthesis, which makes me think the problem
may be somewhere in the syntax-table used by c-mode.
Here's the ERT test:
(ert-deftest cc-mode-should-forward-sexp-with-quotes-inside ()
"Check if `forward-sexp' works in c-mode when the cursor is
inside a comment and there's a ' character inside the
parenthesis"
(with-temp-buffer
(c-mode)
(insert "// Comments are good (aren't they?)")
(goto-char (point-min))
(search-forward "(")
(backward-char 1)
(forward-sexp)
(ert-should (= (point) 36))))
Also, the reason I think that the problem only affects c-mode and modes that
derive from it is because this problem doesn't show up in
emacs-lisp-mode or lisp-mode.
Here's how to see the problem when starting emacs with the -Q flag:
1. Create the temporary buffer "temp-buffer" with C-x b temp-buffer RET
2. Activate c-mode with M-x c-mode
3. Activate show-paren-mode with M-x show-paren-mode
4. Write "// Comments are good (aren't they?)"
5. When typing the closing parenthesis, notice that it's highlighted
with the face show-paren-mismatch
Another test that can be used that doesn't use show-paren-mode but still
shows wrong behaviour is the following:
1. Create the temporary buffer as before
2. Activate c-mode as before
2. Write "// Comments are good (aren't they?)"
3. When typing the closing parenthesis, notice that the minibuffer shows
the message "No matching parenthesis found".
In GNU Emacs 24.1.50.1 (i686-pc-linux-gnu, GTK+ Version 2.20.1)
of 2012-07-15 on rolando-desktop
Bzr revision: 109096 dmantipov@yandex.ru-20120715111709-pa3d1hni2gmjdux0
Windowing system distributor `The X.Org Foundation', version 11.0.10706000
Important settings:
value of $LANG: pt_PT.utf8
locale-coding-system: utf-8-unix
default enable-multibyte-characters: t
Major mode: Lisp Interaction
Minor modes in effect:
tooltip-mode: t
mouse-wheel-mode: t
tool-bar-mode: t
menu-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
blink-cursor-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t
line-number-mode: t
transient-mark-mode: t
Recent input:
M-x r e p o r <tab> <return>
Recent messages:
For information about GNU Emacs and the GNU system, type C-h C-a.
Starting new Ispell process [/usr/bin/aspell::default] ...
Checking spelling of PARENTHESIS...
byte-code: Window #<window 4 on *Minibuf-1*> too small for splitting
Load-path shadows:
None found.
Features:
(shadow sort gnus-util mail-extr ispell emacsbug message format-spec
rfc822 mml easymenu mml-sec mm-decode mm-bodies mm-encode mail-parse
rfc2231 mailabbrev gmm-utils mailheader sendmail rfc2047 rfc2045
ietf-drums mm-util mail-prsvr mail-utils time-date tooltip ediff-hook
vc-hooks lisp-float-type mwheel x-win x-dnd tool-bar dnd fontset image
regexp-opt fringe tabulated-list newcomment lisp-mode register page
menu-bar rfn-eshadow timer select scroll-bar mouse jit-lock font-lock
syntax facemenu font-core frame cham georgian utf-8-lang misc-lang
vietnamese tibetan thai tai-viet lao korean japanese hebrew greek
romanian slovak czech european ethiopic indian cyrillic chinese
case-table epa-hook jka-cmpr-hook help simple abbrev minibuffer loaddefs
button faces cus-face files text-properties overlay sha1 md5 base64
format env code-pages mule custom widget hashtable-print-readable
backquote make-network-process dbusbind dynamic-setting
system-font-setting font-render-setting move-toolbar gtk x-toolkit x
multi-tty emacs)
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- bug#11982: 24.1.50; (Contains ERT Test) show-paren-mode doesn't work in C comments if there's a quote between the parenthesis (affects c-mode and modes derived from it),
Rolando Pereira <=