GNU bug report logs - #75978
31.0.50; Using fill-region doesn't produce commented lines in go-ts-mode

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: the_wurfkreuz <the_wurfkreuz <at> proton.me>
To: "bug-gnu-emacs <at> gnu.org" <bug-gnu-emacs <at> gnu.org>
Subject: 31.0.50;
 Using fill-region doesn't produce commented lines in go-ts-mode
Date: Fri, 31 Jan 2025 19:21:40 +0000

[Message part 1 (text/plain, inline)]

I noticed that, unlike in other built-in language modes, in go-ts-mode, using fill-region on a comment line doesn't automatically comment the new line.

Steps to reproduce:
1. emacs -Q
2. Paste this text so that it takes only a single line: "To make our function interact with Waitgroup, we need to send a reference to this group. Once we have its reference, the function can defer, calling Done(), to ensure that we signal correctly for our group every time the function is complete."
3. Run set-mark-command and select the whole line using
move-beginning-of-line.
4. Enable go-ts-mode (assuming that the grammar is already compiled).
5. Use comment-region on the selected text.
6. Then select the whole line again and execute fill-region.

The newly created lines aren't commented. If I do the same thing in

python-ts-mode

, the new lines are commented out.

In GNU Emacs 31.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version
3.24.43, cairo version 1.18.0) of 2025-01-20 built on ub-void
Repository revision: b568ff418ce7147c27d7f82fe4a8eef325b9de2c
Repository branch: master
System Description: Void Linux

Configured using:
'configure --with-native-compilation=aot --with-tree-sitter --with-gif
--with-png --with-jpeg --with-rsvg --with-tiff --with-imagemagick
--with-pgtk --with-mailutils'

Configured features:
CAIRO DBUS FREETYPE GLIB GMP GNUTLS GSETTINGS HARFBUZZ IMAGEMAGICK JPEG
LCMS2 LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY PDUMPER PGTK PNG RSVG
SECCOMP SOUND SQLITE3 THREADS TIFF TOOLKIT_SCROLL_BARS TREE_SITTER XIM
GTK3 ZLIB

Important settings:
value of $LC_COLLATE: C
value of $LANG: en_US.UTF-8
locale-coding-system: utf-8-unix

Major mode: ELisp/l

Minor modes in effect:
windmove-mode: t
savehist-mode: t
meow-global-mode: t
meow-mode: t
meow-normal-mode: t
meow-esc-mode: t
envrc-global-mode: t
envrc-mode: t
buffer-terminator-mode: t
global-git-commit-mode: t
magit-auto-revert-mode: t
marginalia-mode: t
vertico-mode: t
corfu-popupinfo-mode: t
corfu-history-mode: t
corfu-echo-mode: t
global-corfu-mode: t
corfu-mode: t
which-key-mode: t
undo-fu-session-global-mode: t
undo-fu-session-mode: t
global-treesit-auto-mode: t
global-auto-revert-mode: t
save-place-mode: t
electric-pair-mode: t
recentf-mode: t
global-display-line-numbers-mode: t
display-line-numbers-mode: t
override-global-mode: t
tooltip-mode: t
show-paren-mode: t
electric-indent-mode: t
mouse-wheel-mode: t
tab-bar-mode: t
file-name-shadow-mode: t
global-font-lock-mode: t
font-lock-mode: t
minibuffer-regexp-mode: t
line-number-mode: t
transient-mark-mode: t
auto-composition-mode: t
auto-encryption-mode: t
auto-compression-mode: t

Load-path shadows:
/home/wurfkreuz/.emacs.d/elpa/transient-20250108.1351/transient hides /home/wurfkreuz/.source/emacs/lisp/transient

Features:
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dynamic-setting system-font-setting font-render-setting cairo gtk pgtk
lcms2 multi-tty move-toolbar make-network-process tty-child-frames
native-compile emacs)

Memory information:
((conses 16 859029 224316) (symbols 48 53222 28) (strings 32 252943 9100)
(string-bytes 1 8350345) (vectors 16 97934) (vector-slots 8 1794516 154778)
(floats 8 759 336) (intervals 56 4355 1377) (buffers 992 35))

[Message part 2 (text/html, inline)]

Message #8 received at 75978 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: the_wurfkreuz <the_wurfkreuz <at> proton.me>, Randy Taylor <dev <at> rjt.dev>,
 Yuan Fu <casouri <at> gmail.com>
Cc: 75978 <at> debbugs.gnu.org
Subject: Re: bug#75978: 31.0.50;
 Using fill-region doesn't produce commented lines in go-ts-mode
Date: Sat, 08 Feb 2025 12:47:52 +0200

> Date: Fri, 31 Jan 2025 19:21:40 +0000
> From:  the_wurfkreuz via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs <at> gnu.org>
> 
> I noticed that, unlike in other built-in language modes, in go-ts-mode, using fill-region on a comment line
> doesn't automatically comment the new line.
> 
> Steps to reproduce:
> 1. emacs -Q
> 2. Paste this text so that it takes only a single line: "To make our function interact with Waitgroup, we need to
> send a reference to this group. Once we have its reference, the function can defer, calling Done(), to ensure
> that we signal correctly for our group every time the function is complete."
> 3. Run set-mark-command and select the whole line using
> move-beginning-of-line.
> 4. Enable go-ts-mode (assuming that the grammar is already compiled).
> 5. Use comment-region on the selected text.
> 6. Then select the whole line again and execute fill-region.
> The newly created lines aren't commented. If I do the same thing in 
> python-ts-mode, the new lines are commented out.

Randy and Yuan, any comments or suggestions?

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