From: Kenichi Handa <handa@m17n.org>
To: Chong Yidong <cyd@stupidchicken.com>
Cc: emacs-devel@gnu.org
Subject: Re: Unicode character read representation
Date: Tue, 24 Feb 2009 20:14:14 +0900 [thread overview]
Message-ID: <E1LbvEs-0004v7-F1@etlken> (raw)
In-Reply-To: <87hc2n28a4.fsf@cyd.mit.edu> (message from Chong Yidong on Sat, 21 Feb 2009 09:07:15 -0500)
In article <87hc2n28a4.fsf@cyd.mit.edu>, Chong Yidong <cyd@stupidchicken.com> writes:
> From objects.texi in the Lisp manual:
> `\U00NNNNNN' represents the character whose Unicode code point is
> `U+NNNNNN', if such a character is supported by Emacs. If the
> corresponding character is not supported, Emacs signals an error.
> Are there any Unicode code points not supported by Emacs,
No.
> or is this sentence obsolete?
Not completely obsolete, but should be modified somehow.
At first, #x0..#x3FFFFF are all valid Emacs character codes.
Some of U+NNNNNN are valid Unicode code points for
"noncharacter" (e.g. U+FFFE, U+FFFF), some are invalid
Unicode code points (U+120000..U+3FFFFF), some are invalid
both as Unicode code points and Emacs character codes
(U+400000 and over).
Currently Emacs signals an error only for U+400000 and over,
and I'm not sure how strictly we should interprete
\U.. notation.
---
Kenichi Handa
handa@m17n.org
next prev parent reply other threads:[~2009-02-24 11:14 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-21 14:07 Unicode character read representation Chong Yidong
2009-02-21 14:22 ` Harald Hanche-Olsen
2009-02-24 11:14 ` Kenichi Handa [this message]
2009-02-24 22:16 ` Stefan Monnier
2009-02-26 7:28 ` Kenichi Handa
2009-02-26 15:08 ` Stefan Monnier
2009-02-27 0:51 ` Kenichi Handa
2009-02-27 1:45 ` Chong Yidong
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