GNU bug report logs - #24405
24.5; Possibly ``forward-word`` doesn't respect ``word-combining-categories`` for word boundaries on changing between latin/phonetic scripts.

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From: help-debbugs <at> gnu.org (GNU bug Tracking System)
To: Oleksandr Gavenko <gavenkoa <at> gmail.com>
Subject: bug#24405: closed (Re: bug#24405: 24.5; Possibly ``forward-word``
 doesn't respect ``word-combining-categories`` for word boundaries on
 changing between latin/phonetic scripts.)
Date: Sun, 29 Sep 2019 04:35:02 +0000

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Your bug report

#24405: 24.5; Possibly ``forward-word`` doesn't respect ``word-combining-categories`` for word boundaries on changing between latin/phonetic scripts.

which was filed against the emacs package, has been closed.

The explanation is attached below, along with your original report.
If you require more details, please reply to 24405 <at> debbugs.gnu.org.

-- 
24405: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=24405
GNU Bug Tracking System
Contact help-debbugs <at> gnu.org with problems

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From: Stefan Kangas <stefan <at> marxist.se>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 24405-done <at> debbugs.gnu.org, Oleksandr Gavenko <gavenkoa <at> gmail.com>
Subject: Re: bug#24405: 24.5; Possibly ``forward-word`` doesn't respect
 ``word-combining-categories`` for word boundaries on changing between
 latin/phonetic scripts.
Date: Sun, 29 Sep 2019 06:33:45 +0200

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

> tags 24405 + notabug
> thanks
[...]
> This is the intended behavior, yes.  The word-combining-categories
> feature is designed to support specific rare situations with mixing
> the Far Eastern scripts (e.g., use of Kanji characters in Japanese
> text), not for arbitrary games with Latin and European scripts.

This was already tagged notabug, and I can see nothing more to do here.
I'm therefore closing this now.

Best regards,
Stefan Kangas

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From: Oleksandr Gavenko <gavenkoa <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 24.5; Possibly ``forward-word`` doesn't respect
 ``word-combining-categories`` for word boundaries on changing between
 latin/phonetic scripts.
Date: Sat, 10 Sep 2016 11:33:45 +0300

Evaluate following form by C-x C-e:

  (let ((word-combining-categories '((?l . ?y) (?y . ?l) (?l . ?l)))
        (word-separating-categories nil))
    (forward-word))

  HelloПривLLжɪəʊheləʊaiɪa

My pointer stopped between ʊh.

I have:

  (aref char-script-table ?ʊ) phonetic
  (aref char-script-table ?h) latin
  (aref char-script-table ?ж) cyrillic

  (category-set-mnemonics (char-category-set ?ʊ)) ".Ljl"
  (category-set-mnemonics (char-category-set ?h)) ".Lalr"

  (category-docstring ?y) "Cyrillic"
  (category-docstring ?l) "Latin"

I expect that point moved to last character before new line.

Seems that:

  (?l . ?y) (?y . ?l)

has effect because pointer moved across Cyrillic/Latin and Cyrillic/Phonetic
scripts but refused to move through Latin/Phonetic scripts.

If it is intended behavior how will I make Emacs to move across Latin/Phonetic
scripts?

See also:

  http://emacs.stackexchange.com/questions/21131/does-word-syntax-take-script-into-account

In GNU Emacs 24.5.1 (x86_64-pc-linux-gnu, GTK+ Version 3.18.6)
 of 2016-01-22 on binet, modified by Debian
Windowing system distributor `The X.Org Foundation', version 11.0.11803000
System Description:	Debian GNU/Linux testing (stretch)

-- 
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