* bug#40865: 26.3; Electric pair mode and syntax class $
@ 2020-04-26 10:18 Augusto Stoffel
2020-05-12 21:58 ` João Távora
0 siblings, 1 reply; 2+ messages in thread
From: Augusto Stoffel @ 2020-04-26 10:18 UTC (permalink / raw)
To: 40865
Electric pair mode does not treat string quote characters and paired
delimiters (syntax class "$") in the same way, but it should probably
do so.
For instance, in TeX mode with electric pair mode active, typing a
dollar sign in the situation
$a<point here>$
shold result in
$a$<point here>
but instead results in
$a$<point here>$$
The issue seems to be related with the function
`electric-pair-skip-if-helps-balance'.
In GNU Emacs 26.3 (build 1, x86_64-redhat-linux-gnu, GTK+ Version
3.24.13)
of 2019-12-10 built on buildhw-07.phx2.fedoraproject.org
Windowing system distributor 'Fedora Project', version 11.0.12006000
Recent messages:
Quit [2 times]
Making completion list... [2 times]
next-line: End of buffer
Quit
(New file)
Making completion list...
Auto-saving...done
delete-backward-char: Beginning of buffer
Configured using:
'configure --build=x86_64-redhat-linux-gnu
--host=x86_64-redhat-linux-gnu --program-prefix=
--disable-dependency-tracking --prefix=/usr --exec-prefix=/usr
--bindir=/usr/bin --sbindir=/usr/sbin --sysconfdir=/etc
--datadir=/usr/share --includedir=/usr/include --libdir=/usr/lib64
--libexecdir=/usr/libexec --localstatedir=/var
--sharedstatedir=/var/lib --mandir=/usr/share/man
--infodir=/usr/share/info --with-dbus --with-gif --with-jpeg --with-
png
--with-rsvg --with-tiff --with-xft --with-xpm --with-x-toolkit=gtk3
--with-gpm=no --with-xwidgets --with-modules
build_alias=x86_64-redhat-linux-gnu host_alias=x86_64-redhat-linux-gnu
'CFLAGS=-DMAIL_USE_LOCKF -O2 -g -pipe -Wall -Werror=format-security
-Wp,-D_FORTIFY_SOURCE=2 -Wp,-D_GLIBCXX_ASSERTIONS -fexceptions
-fstack-protector-strong -grecord-gcc-switches
-specs=/usr/lib/rpm/redhat/redhat-hardened-cc1
-specs=/usr/lib/rpm/redhat/redhat-annobin-cc1 -m64 -mtune=generic
-fasynchronous-unwind-tables -fstack-clash-protection -fcf-protection'
LDFLAGS=-Wl,-z,relro
PKG_CONFIG_PATH=:/usr/lib64/pkgconfig:/usr/share/pkgconfig'
Configured features:
XPM JPEG TIFF GIF PNG RSVG IMAGEMAGICK SOUND DBUS GSETTINGS GLIB NOTIFY
ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
TOOLKIT_SCROLL_BARS GTK3 X11 XDBE XIM MODULES THREADS XWIDGETS LCMS2
Important settings:
value of $LC_MONETARY: en_IE.UTF-8
value of $LC_NUMERIC: en_IE.UTF-8
value of $LC_TIME: en_IE.UTF-8
value of $LANG: en_US.UTF-8
value of $XMODIFIERS: @im=ibus
locale-coding-system: utf-8-unix
Major mode: Emacs-Lisp
Minor modes in effect:
shell-dirtrack-mode: t
electric-pair-mode: t
tooltip-mode: t
global-eldoc-mode: t
eldoc-mode: t
electric-indent-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
Load-path shadows:
None found.
Features:
(shadow sort mail-extr emacsbug message rmc puny seq byte-opt gv
bytecomp byte-compile cconv dired dired-loaddefs format-spec rfc822 mml
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radix-tree help-mode easymenu cl-loaddefs cl-lib cus-start cus-load
tex-mode compile shell pcomplete comint ansi-color ring elec-pair
time-date mule-util tooltip eldoc electric uniquify ediff-hook vc-hooks
lisp-float-type mwheel term/x-win x-win term/common-win x-dnd tool-bar
dnd fontset image regexp-opt fringe tabulated-list replace newcomment
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cl-preloaded nadvice loaddefs button faces cus-face macroexp files
text-properties overlay sha1 md5 base64 format env code-pages mule
custom widget hashtable-print-readable backquote threads dbusbind
inotify lcms2 dynamic-setting system-font-setting font-render-setting
xwidget-internal move-toolbar gtk x-toolkit x multi-tty
make-network-process emacs)
Memory information:
((conses 16 119197 10577)
(symbols 48 34191 1)
(miscs 40 85 126)
(strings 32 90141 1712)
(string-bytes 1 2065674)
(vectors 16 16375)
(vector-slots 8 917191 21162)
(floats 8 65 235)
(intervals 56 429 0)
(buffers 992 14))
^ permalink raw reply [flat|nested] 2+ messages in thread
* bug#40865: 26.3; Electric pair mode and syntax class $
2020-04-26 10:18 bug#40865: 26.3; Electric pair mode and syntax class $ Augusto Stoffel
@ 2020-05-12 21:58 ` João Távora
0 siblings, 0 replies; 2+ messages in thread
From: João Távora @ 2020-05-12 21:58 UTC (permalink / raw)
To: Augusto Stoffel; +Cc: 40865
Augusto Stoffel <arstoffel@gmail.com> writes:
Hi Augusto, thank you for the report.
> Electric pair mode does not treat string quote characters and paired
> delimiters (syntax class "$") in the same way, but it should probably
> do so.
Paired delimiters don't formally define any kind of syntactic region
between them, contrary to string delimiters.
Therefore, electric-pair-mode can't easily know if a decision to skip or
auto-pair would be benefitting the balance of the syntax buffer.
Therefore, it decides to be dumb and always autopair, never autoskip.
If I had chosen the alternative, having your point just before a '$foo$'
would make autoskip put it inside the group, instead of creating a new
'$$$foo$', which is probably what you wanted in that particular
situation.
Maybe, even though flawed, that is more defensible as a default
behaviour than the current one. At least it doesn't seem to break any
tests.
The "correct" way to fix this is to make latex-mode treat paired
delimiters like it does string delimiteres. But that probably has other
negative implications that I'm not aware of.
I have the vague recollection that this came up when I was developing
electric-pair-mode, particularly in latex-mode, some 6 years ago, but I
can't remember anymore.
Anyway, if you do prefer the alternative I gave earlier you can do this:
(add-hook 'latex-mode-hook
(lambda ()
(add-function :before-until
(local 'electric-pair-skip-self)
(lambda (char) (eq char ?$))
'((name . latex-skip-paired-delimiters)))))
João
PS: On a related note, note that AUCTex mode (a different mode to edit
TeX files) has a special binding for the dollar sign, TeX-insert-dollar,
which doesn't follow _any_ of electric-pair-mode.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2020-04-26 10:18 bug#40865: 26.3; Electric pair mode and syntax class $ Augusto Stoffel
2020-05-12 21:58 ` João Távora
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