GNU bug report logs - #25432
U+3001 IDEOGRAPHIC COMMA is punctuation

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

From: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
To: bug-gnu-emacs <at> gnu.org
Subject: U+3001 IDEOGRAPHIC COMMA is punctuation
Date: Fri, 13 Jan 2017 08:05:12 +0800

M-/ (translated from <escape> /) runs the command dabbrev-expand

But when I do ESC / here,

阿G信> 想向您請教，新北市消防局 北海頻率、Talkgroup、顏色碼、slot

至於 Talkg<ESC />

I get
Scanning for dabbrevs...done
user-error: No dynamic expansion for ‘Talkg’ found

That's because "、" is not being treated like a (type of a) comma as it
should.

Same problem with
，bla
。bla
b<ESC />
below them should give bla.
I bet there's more broken too.

Message #8 received at 25432 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
Cc: 25432 <at> debbugs.gnu.org
Subject: Re: bug#25432: U+3001 IDEOGRAPHIC COMMA is punctuation
Date: Fri, 13 Jan 2017 10:32:01 +0200

> From: 積丹尼 Dan Jacobson
> 	<jidanni <at> jidanni.org>
> Date: Fri, 13 Jan 2017 08:05:12 +0800
> 
> M-/ (translated from <escape> /) runs the command dabbrev-expand
> 
> But when I do ESC / here,
> 
> 阿G信> 想向您請教，新北市消防局 北海頻率、Talkgroup、顏色碼、slot
> 
> 至於 Talkg<ESC />
> 
> I get
> Scanning for dabbrevs...done
> user-error: No dynamic expansion for ‘Talkg’ found
> 
> That's because "、" is not being treated like a (type of a) comma as it
> should.

No, that's because by default M-/ searches for symbol-constituent
characters, and 、 can be part of a symbol.  If you don't like that,
customize dabbrev-abbrev-char-regexp to just "\\sw".

IOW, this is a feature: Emacs is primarily a programmer's editor, so
its defaults are supposed to be tuned for that.

Message #11 received at 25432 <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefan <at> marxist.se>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 25432 <at> debbugs.gnu.org,
 積丹尼 Dan Jacobson <jidanni <at> jidanni.org>
Subject: Re: bug#25432: U+3001 IDEOGRAPHIC COMMA is punctuation
Date: Sun, 29 Sep 2019 05:37:32 +0200

tags 25432 + wontfix
close 25432
quit

Eli Zaretskii <eliz <at> gnu.org> writes:

>> From: 積丹尼 Dan Jacobson
>>     <jidanni <at> jidanni.org>
>> Date: Fri, 13 Jan 2017 08:05:12 +0800
>>
>> M-/ (translated from <escape> /) runs the command dabbrev-expand
>>
>> But when I do ESC / here,
>>
>> 阿G信> 想向您請教，新北市消防局 北海頻率、Talkgroup、顏色碼、slot
>>
>> 至於 Talkg<ESC />
>>
>> I get
>> Scanning for dabbrevs...done
>> user-error: No dynamic expansion for ‘Talkg’ found
>>
>> That's because "、" is not being treated like a (type of a) comma as it
>> should.
>
> No, that's because by default M-/ searches for symbol-constituent
> characters, and 、 can be part of a symbol.  If you don't like that,
> customize dabbrev-abbrev-char-regexp to just "\\sw".
>
> IOW, this is a feature: Emacs is primarily a programmer's editor, so
> its defaults are supposed to be tuned for that.

According to the above explanation, this is the desired behaviour.  I'm
consequently closing this as wontfix.

Best regards,
Stefan Kangas

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