From: Paul Eggert <eggert@cs.ucla.edu>
To: Eli Zaretskii <eliz@gnu.org>, emacs-devel@gnu.org
Subject: Re: Buffer-local variables affect general-purpose functions
Date: Wed, 26 Mar 2014 12:32:05 -0700 [thread overview]
Message-ID: <53332B35.8050109@cs.ucla.edu> (raw)
In-Reply-To: <831txozsqa.fsf@gnu.org>
Eli Zaretskii wrote:
> do we want to do something about that?
Yes, and we should start by removing the backwards-compatibility hacks
in question. Whether the current buffer is unibyte should not affect
the behavior of general-purpose functions on characters.
Elisp code that blindly extracts bytes from unibyte buffers or strings,
and treats these bytes as characters, is broken anyway. It needs to be
fixed to convert bytes to characters (using 'unibyte-char-to-multibyte',
say) before it gives them to general-purpose character functions like
'downcase' and 'char-equal'.
Years ago, when these backwards-compatibility hacks were put in, it made
sense to have them, because unibyte non-ASCII locales were widespread
and converting code to multibyte was a hassle. But nowadays the vast
majority of non-ASCII usage is multibyte and these hacks cause more
trouble than they're worth -- not just core dumps such as Bug#17011, but
subtle behavioral problems not easily diagnosed. It's time for the
hacks to go.
next prev parent reply other threads:[~2014-03-26 19:32 UTC|newest]
Thread overview: 103+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-26 19:04 Buffer-local variables affect general-purpose functions Eli Zaretskii
2014-03-26 19:32 ` Paul Eggert [this message]
2014-03-26 20:03 ` Eli Zaretskii
2014-03-26 21:50 ` Paul Eggert
2014-03-27 17:42 ` Eli Zaretskii
2014-03-27 18:55 ` Paul Eggert
2014-03-27 14:17 ` Stefan Monnier
2014-03-27 17:17 ` Eli Zaretskii
2014-03-27 21:04 ` Stefan Monnier
2014-03-28 7:11 ` Eli Zaretskii
2014-03-28 7:46 ` Paul Eggert
2014-03-28 8:18 ` Unibyte characters, strings and buffers Eli Zaretskii
2014-03-28 18:42 ` Paul Eggert
2014-03-28 18:52 ` Eli Zaretskii
2014-03-28 19:21 ` Paul Eggert
2014-03-29 6:40 ` Eli Zaretskii
2014-03-29 18:57 ` Paul Eggert
2014-03-29 19:46 ` Eli Zaretskii
2014-03-28 20:23 ` Stefan Monnier
2014-03-29 19:34 ` Stefan Monnier
2014-03-28 14:12 ` Buffer-local variables affect general-purpose functions Stefan Monnier
2014-03-28 3:38 ` Stephen J. Turnbull
2014-03-28 8:51 ` Unibyte characters, strings, and buffers Eli Zaretskii
2014-03-28 10:28 ` Stephen J. Turnbull
2014-03-28 10:58 ` David Kastrup
2014-03-28 11:22 ` Andreas Schwab
2014-03-28 11:34 ` David Kastrup
2014-03-28 11:42 ` Stephen J. Turnbull
2014-03-28 17:29 ` Eli Zaretskii
2014-03-28 17:50 ` David Kastrup
2014-03-28 18:31 ` Eli Zaretskii
2014-03-28 19:25 ` David Kastrup
2014-03-29 6:43 ` Eli Zaretskii
2014-03-29 7:23 ` David Kastrup
2014-03-29 8:24 ` Eli Zaretskii
2014-03-29 8:40 ` David Kastrup
2014-03-29 9:25 ` Eli Zaretskii
2014-03-28 20:27 ` Stefan Monnier
2014-03-29 9:23 ` Stephen J. Turnbull
2014-03-29 9:52 ` Andreas Schwab
2014-03-29 10:48 ` Eli Zaretskii
2014-03-29 11:00 ` Andreas Schwab
2014-03-29 11:18 ` Eli Zaretskii
2014-03-29 11:30 ` Andreas Schwab
[not found] ` <83ha6hduzz.fsf@gnu.org>
2014-03-29 14:30 ` Andreas Schwab
2014-03-29 14:47 ` Eli Zaretskii
2014-03-29 10:42 ` David Kastrup
2014-03-29 11:07 ` Eli Zaretskii
2014-03-29 11:30 ` David Kastrup
2014-03-29 12:58 ` Eli Zaretskii
2014-03-29 13:15 ` David Kastrup
2014-03-29 10:44 ` Eli Zaretskii
2014-03-29 11:06 ` Andreas Schwab
2014-03-29 11:12 ` Eli Zaretskii
2014-03-29 16:11 ` Stephen J. Turnbull
2014-03-29 15:37 ` Stephen J. Turnbull
2014-03-29 15:55 ` David Kastrup
2014-03-29 16:28 ` Stephen J. Turnbull
2014-03-29 17:00 ` David Kastrup
2014-03-30 2:05 ` Stephen J. Turnbull
2014-03-30 9:01 ` David Kastrup
2014-03-30 12:13 ` Stephen J. Turnbull
2014-03-30 14:25 ` Andreas Schwab
2014-03-30 15:05 ` David Kastrup
2014-03-30 15:39 ` Andreas Schwab
2014-03-29 17:08 ` Andreas Schwab
2014-03-30 0:24 ` Richard Stallman
2014-03-30 3:32 ` Stefan Monnier
2014-03-30 15:13 ` Richard Stallman
2014-03-29 15:58 ` Andreas Schwab
2014-03-29 16:35 ` Stephen J. Turnbull
2014-03-29 17:06 ` Andreas Schwab
2014-03-29 17:01 ` Nathan Trapuzzano
2014-03-29 17:08 ` Nathan Trapuzzano
2014-03-29 17:18 ` David Kastrup
2014-03-29 17:33 ` Nathan Trapuzzano
2014-03-30 0:24 ` Richard Stallman
2014-03-30 8:38 ` Andreas Schwab
2014-03-30 15:12 ` Richard Stallman
2014-03-29 17:16 ` David Kastrup
2014-03-28 18:45 ` Daniel Colascione
2014-03-28 19:35 ` Glenn Morris
2014-03-29 11:17 ` Stephen J. Turnbull
2014-03-29 11:22 ` Eli Zaretskii
2014-03-29 16:03 ` Stephen J. Turnbull
2014-03-31 15:22 ` Eli Zaretskii
2014-04-01 3:36 ` Stephen J. Turnbull
2014-04-01 7:42 ` David Kastrup
2014-04-01 9:38 ` Stephen J. Turnbull
2014-04-01 15:19 ` Eli Zaretskii
2014-04-01 15:16 ` Eli Zaretskii
2014-04-02 4:20 ` Stephen J. Turnbull
2014-04-02 17:06 ` Eli Zaretskii
2014-04-03 10:59 ` David Kastrup
2014-04-03 16:07 ` Eli Zaretskii
2014-04-03 16:26 ` David Kastrup
2014-04-03 19:11 ` Eli Zaretskii
2014-04-03 20:03 ` David Kastrup
2014-04-04 0:48 ` Stephen J. Turnbull
2014-04-04 8:08 ` Eli Zaretskii
2014-04-04 7:58 ` Eli Zaretskii
2014-04-04 11:40 ` Richard Stallman
2014-04-03 13:04 ` Stephen J. Turnbull
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