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Re: Horizontal Tab and Line Feed are non-ASCII according to the ASCII ca

From: Kenichi Handa
Subject: Re: Horizontal Tab and Line Feed are non-ASCII according to the ASCII category
Date: Tue, 13 Feb 2007 10:22:34 +0900
User-agent: SEMI/1.14.3 (Ushinoya) FLIM/1.14.2 (Yagi-Nishiguchi) APEL/10.2 Emacs/22.0.93 (i686-pc-linux-gnu) MULE/5.0 (SAKAKI)

In article <address@hidden>, "Chris Moore" <address@hidden> writes:

> On 2/12/07, Eli Zaretskii <address@hidden> wrote:
> > I hope we don't plan on changing _anything_ in this regard before the
> > release, no matter what we find in the specs.  The cited fragment from
> > characters.el has been there since before Emacs moved into CVS in 1997!

> How is the age of the bug relevant?  Searching for ASCII characters
> with \ca matches different characters than searching for ASCII class
> characters with [:ascii:].  Surely that's a bug that needs fixing,
> rather than a feature to be added later isn't it?

> We're not required to follow the spec, but it's not good to use 2
> different definitions of ASCII.

When I defined the category `a' for ASCII, the intention was
to specify characters of "ISO646 IRV:1983[4/0]" which is an
ISO character set based on ASCII, and that contains only
graphic characters.  So, how about treating this matter as
a documentation bug, and fix it to:
  "ISO646 IRV:1983[4/0] (ASCII graphic characters)"
instead of modifying the code?

Kenichi Handa

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