From: "Stephen J. Turnbull" <stephen@xemacs.org>
To: Alan Mackenzie <acm@muc.de>
Cc: Aidan Kehoe <kehoea@parhasard.net>,
emacs-devel@gnu.org, Andreas Schwab <schwab@linux-m68k.org>,
Stefan Monnier <monnier@iro.umontreal.ca>,
Jason Rumney <jasonr@gnu.org>
Subject: Re: Fwd: Re: Inadequate documentation of silly characters on screen.
Date: Fri, 20 Nov 2009 11:43:42 +0900 [thread overview]
Message-ID: <87y6m17w69.fsf@uwakimon.sk.tsukuba.ac.jp> (raw)
In-Reply-To: <20091119172934.GD1314@muc.de>
Alan Mackenzie writes:
> In XEmacs, characters and integers are distinct types. That causes
> extra work having to convert between them, both mentally and in writing
> code.
Why do you have to convert? The only time you need to worry about the
integer values of characters is (1) when implementing a coding system
and (2) when dealing with control characters which do not have
consistent names or graphic representations (mostly the C1 set, but
there are areas in C0 as well -- quick, what's the name of \034?)
When do you need to do either?
> It is not that the GNU Emacs way is wrong, it just has a bug at the
> moment.
I agree that equating the character type to the integer type is not
"wrong". It's a tradeoff which we make differently from Emacs: Emacs
prefers code that is shorter and easier to write, XEmacs prefers code
that may be longer (ie, uses explicit conversions where necessary) but
is easier to debug because it signals errors earlier (ie, when a
function receives an object of the wrong type rather than when a user
observes incorrect display).
However, I think that allowing a given array of bytes to change type
from unibyte to multibyte and back is just insane. Either the types
should be different and immutable (as in Python) or there should be
only one representation (multibyte) as in XEmacs.
next prev parent reply other threads:[~2009-11-20 2:43 UTC|newest]
Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-11-18 19:12 [acm@muc.de: Re: Inadequate documentation of silly characters on screen.] Alan Mackenzie
2009-11-19 1:27 ` Fwd: Re: Inadequate documentation of silly characters on screen Stefan Monnier
2009-11-19 8:20 ` Alan Mackenzie
2009-11-19 8:50 ` Miles Bader
2009-11-19 10:16 ` Fwd: " Andreas Schwab
2009-11-19 12:21 ` Alan Mackenzie
2009-11-19 13:21 ` Jason Rumney
2009-11-19 13:35 ` Stefan Monnier
2009-11-19 14:18 ` Alan Mackenzie
2009-11-19 14:58 ` Jason Rumney
2009-11-19 15:42 ` Alan Mackenzie
2009-11-19 19:39 ` Eli Zaretskii
2009-11-19 15:30 ` Stefan Monnier
2009-11-19 15:58 ` Alan Mackenzie
2009-11-19 16:06 ` Andreas Schwab
2009-11-19 16:47 ` Aidan Kehoe
2009-11-19 17:29 ` Alan Mackenzie
2009-11-19 18:21 ` Aidan Kehoe
2009-11-20 2:43 ` Stephen J. Turnbull [this message]
2009-11-19 19:45 ` Eli Zaretskii
2009-11-19 20:07 ` Eli Zaretskii
2009-11-19 19:55 ` Stefan Monnier
2009-11-20 3:13 ` Stephen J. Turnbull
2009-11-19 16:55 ` David Kastrup
2009-11-19 18:08 ` Alan Mackenzie
2009-11-19 19:25 ` Davis Herring
2009-11-19 21:25 ` Alan Mackenzie
2009-11-19 22:31 ` David Kastrup
2009-11-21 22:52 ` Richard Stallman
2009-11-23 2:08 ` Displaying bytes (was: Inadequate documentation of silly characters on screen.) Stefan Monnier
2009-11-23 20:38 ` Richard Stallman
2009-11-23 21:34 ` Per Starbäck
2009-11-24 22:47 ` Richard Stallman
2009-11-25 1:33 ` Kenichi Handa
2009-11-25 2:29 ` Displaying bytes (was: Inadequate documentation of silly Stefan Monnier
2009-11-25 2:50 ` Lennart Borgman
2009-11-25 6:25 ` Stephen J. Turnbull
2009-11-25 5:40 ` Displaying bytes (was: Inadequate documentation of silly characters on screen.) Ulrich Mueller
2009-11-26 22:59 ` Displaying bytes Reiner Steib
2009-11-27 0:16 ` Ulrich Mueller
2009-11-27 1:41 ` Stefan Monnier
2009-11-27 4:14 ` Stephen J. Turnbull
2009-11-25 5:59 ` Displaying bytes (was: Inadequate documentation of silly characters on screen.) Stephen J. Turnbull
2009-11-25 8:16 ` Kenichi Handa
2009-11-29 16:01 ` Richard Stallman
2009-11-29 16:31 ` Displaying bytes (was: Inadequate documentation of silly Stefan Monnier
2009-11-29 22:01 ` Juri Linkov
2009-11-30 6:05 ` tomas
2009-11-30 12:09 ` Andreas Schwab
2009-11-30 12:39 ` tomas
2009-11-29 22:19 ` Displaying bytes (was: Inadequate documentation of silly characters on screen.) Kim F. Storm
2009-11-30 1:42 ` Stephen J. Turnbull
2009-11-24 1:28 ` Displaying bytes Stefan Monnier
2009-11-24 22:47 ` Richard Stallman
2009-11-25 2:18 ` Stefan Monnier
2009-11-26 6:24 ` Richard Stallman
2009-11-26 8:59 ` David Kastrup
2009-11-26 14:57 ` Stefan Monnier
2009-11-26 16:28 ` Lennart Borgman
2009-11-27 6:36 ` Richard Stallman
2009-11-24 22:47 ` Richard Stallman
2009-11-20 8:48 ` Fwd: Re: Inadequate documentation of silly characters on screen Eli Zaretskii
2009-11-19 19:52 ` Eli Zaretskii
2009-11-19 20:53 ` Alan Mackenzie
2009-11-19 22:16 ` David Kastrup
2009-11-20 8:55 ` Eli Zaretskii
2009-11-19 20:05 ` Stefan Monnier
2009-11-19 21:27 ` Alan Mackenzie
2009-11-19 19:43 ` Eli Zaretskii
2009-11-19 21:57 ` Alan Mackenzie
2009-11-19 23:10 ` Stefan Monnier
2009-11-19 20:02 ` Stefan Monnier
2009-11-19 14:08 ` Stefan Monnier
2009-11-19 14:50 ` Jason Rumney
2009-11-19 15:27 ` Stefan Monnier
2009-11-19 23:12 ` Miles Bader
2009-11-20 2:16 ` Stefan Monnier
2009-11-20 3:37 ` Stephen J. Turnbull
2009-11-20 4:30 ` Stefan Monnier
2009-11-20 7:18 ` Stephen J. Turnbull
2009-11-20 14:16 ` Stefan Monnier
2009-11-21 4:13 ` Stephen J. Turnbull
2009-11-21 5:24 ` Stefan Monnier
2009-11-21 6:42 ` Stephen J. Turnbull
2009-11-21 6:49 ` Stefan Monnier
2009-11-21 7:27 ` Stephen J. Turnbull
2009-11-23 1:58 ` Stefan Monnier
2009-11-21 12:33 ` David Kastrup
2009-11-21 13:55 ` Stephen J. Turnbull
2009-11-21 14:36 ` David Kastrup
2009-11-21 17:53 ` Stephen J. Turnbull
2009-11-21 23:30 ` David Kastrup
2009-11-22 1:27 ` Sebastian Rose
2009-11-22 8:06 ` David Kastrup
2009-11-22 23:52 ` Sebastian Rose
2009-11-19 17:08 ` Fwd: " Alan Mackenzie
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=87y6m17w69.fsf@uwakimon.sk.tsukuba.ac.jp \
--to=stephen@xemacs.org \
--cc=acm@muc.de \
--cc=emacs-devel@gnu.org \
--cc=jasonr@gnu.org \
--cc=kehoea@parhasard.net \
--cc=monnier@iro.umontreal.ca \
--cc=schwab@linux-m68k.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
Code repositories for project(s) associated with this external index
https://git.savannah.gnu.org/cgit/emacs.git
https://git.savannah.gnu.org/cgit/emacs/org-mode.git
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.