From: Stefan Monnier <monnier@iro.umontreal.ca>
To: Kenichi Handa <handa@m17n.org>
Cc: emacs-devel@gnu.org
Subject: Re: (aset UNIBYTE-STRING MULTIBYTE-CHAR)
Date: Thu, 14 Feb 2008 23:27:50 -0500 [thread overview]
Message-ID: <jwv7ih6g8f1.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <E1JPpXZ-0006Ii-JY@etlken.m17n.org> (Kenichi Handa's message of "Fri, 15 Feb 2008 10:39:01 +0900")
> Even if the code is very bad, it worked in Emacs 22.
> If it doesn't work in Emacs 23, it's a regression.
If it makes them improve their code, it's an ... improvement.
> The problem here is that (make-string 1 ?a) is a unibyte
> string, but "a" generated by buffer-substring on a multibyte
> buffer is a multibyte string. The result of concatinating
> them is also multibyte. So, the multibyteness of strings is
> difficult of expect.
Indeed. To work around this problem, my locally hacked Emacs
distinguishes between unibyte strings (byte-length < 0), multibyte
strings (byte-length > char-length), and "anybyte" strings (byte-length
= char-length).
> If we are going to inhibit aset on multibyte strings,
We can just inhibit aset if it requires changes the string's byte-length
or multibyte-ness.
> I think we should inhibit aset on any strings to avoid
> a further confusion.
And that's indeed what my locally hacked Emacs does.
>> When weighed against the *very* rare cases where aset is used (let
>> alone the even more rare cases where aset is actually useful and
>> convenient), the choice is trivial (for me anyway).
> Then, shouldn't we start the experiment of inhibitting aset
> on strings just now?
But I do not think we're ready for that. Maybe 10 years from now...
Stefan
next prev parent reply other threads:[~2008-02-15 4:27 UTC|newest]
Thread overview: 43+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-02-13 2:36 (aset UNIBYTE-STRING MULTIBYTE-CHAR) Kenichi Handa
2008-02-13 2:49 ` Stefan Monnier
2008-02-13 3:48 ` Kenichi Handa
2008-02-13 15:33 ` Stefan Monnier
2008-02-13 18:06 ` Stephen J. Turnbull
2008-02-13 19:33 ` Stefan Monnier
2008-02-13 22:49 ` Miles Bader
2008-02-14 1:11 ` Stephen J. Turnbull
2008-02-14 1:17 ` Miles Bader
2008-02-14 1:40 ` Stefan Monnier
2008-02-14 1:49 ` Miles Bader
2008-02-14 18:10 ` Richard Stallman
2008-02-14 22:40 ` David Kastrup
2008-02-15 1:08 ` Stephen J. Turnbull
2008-02-15 1:17 ` Miles Bader
2008-02-15 7:27 ` David Kastrup
2008-02-15 12:58 ` Richard Stallman
2008-02-14 23:37 ` Leo
2008-02-15 12:59 ` Richard Stallman
2008-02-14 4:20 ` Stephen J. Turnbull
2008-02-14 4:42 ` Richard Stallman
2008-02-15 1:39 ` Kenichi Handa
2008-02-15 4:27 ` Stefan Monnier [this message]
2008-02-15 8:42 ` Eli Zaretskii
2008-02-15 8:53 ` Miles Bader
2008-02-16 12:55 ` Eli Zaretskii
2008-02-16 5:53 ` Richard Stallman
2008-02-16 14:33 ` Stefan Monnier
2008-02-17 20:29 ` Richard Stallman
2008-02-18 1:15 ` Stefan Monnier
2008-02-18 4:00 ` Kenichi Handa
2008-02-18 17:31 ` Richard Stallman
2008-02-13 22:01 ` Richard Stallman
2008-02-13 23:13 ` Miles Bader
-- strict thread matches above, loose matches on Subject: below --
2008-04-15 7:11 Kenichi Handa
2008-04-15 15:52 ` Stefan Monnier
2008-04-17 1:13 ` Kenichi Handa
2008-05-07 19:31 Harald Hanche-Olsen
2008-05-14 6:54 ` Harald Hanche-Olsen
2008-05-14 12:22 ` Stefan Monnier
2008-05-14 12:50 ` Harald Hanche-Olsen
2008-05-15 1:18 ` Stefan Monnier
2008-05-15 6:11 ` Harald Hanche-Olsen
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