elisp 23.2 doc on regex on multibyte char still correct?

elisp 23.2 doc on regex on multibyte char still correct?

[Xah Lee]

in elisp doc for emacs 23.2, section on regex, it
it has a section that talks about multibyte chars.

is that info still correct?

________________________________________


This is edition 3.0 of the GNU Emacs Lisp Reference Manual,
corresponding to Emacs version 23.2.

(elisp) Regexp Special

     The beginning and end of a range of multibyte characters must be
in
     the same character set (*note Character Sets::).  Thus,
     `"[\x8e0-\x97c]"' is invalid because character 0x8e0 (`a' with
     grave accent) is in the Emacs character set for Latin-1 but the
     character 0x97c (`u' with diaeresis) is in the Emacs character
set
     for Latin-2.  (We use Lisp string syntax to write that example,
     and a few others in the next few paragraphs, in order to include
     hex escape sequences in them.)

     If a range starts with a unibyte character C and ends with a
     multibyte character C2, the range is divided into two parts: one
     is `C..?\377', the other is `C1..C2', where C1 is the first
     character of the charset to which C2 belongs.

     You cannot always match all non-ASCII characters with the regular
     expression `"[\200-\377]"'.  This works when searching a unibyte
     buffer or string (*note Text Representations::), but not in a
     multibyte buffer or string, because many non-ASCII characters
have
     codes above octal 0377.  However, the regular expression
     `"[^\000-\177]"' does match all non-ASCII characters (see below
     regarding `^'), in both multibyte and unibyte representations,
     because only the ASCII characters are excluded.

     A character alternative can also specify named character classes
     (*note Char Classes::).  This is a POSIX feature whose syntax is
     `[:CLASS:]'.  Using a character class is equivalent to mentioning
     each of the characters in that class; but the latter is not
     feasible in practice, since some classes include thousands of
     different characters.

________________________________________

 Xah ∑ http://xahlee.org/ ☄

Re: elisp 23.2 doc on regex on multibyte char still correct?

[Eli Zaretskii]

> From: Xah Lee <xahlee@gmail.com>
> Date: Mon, 3 Jan 2011 01:12:47 -0800 (PST)
> 
> 
> in elisp doc for emacs 23.2, section on regex, it
> it has a section that talks about multibyte chars.
> 
> is that info still correct?

No.  Please submit a bug report.

Re: elisp 23.2 doc on regex on multibyte char still correct?

[Xah Lee]

On Jan 3, 10:17 am, Eli Zaretskii <e...@gnu.org> wrote:
> > From: Xah Lee <xah...@gmail.com>
> > Date: Mon, 3 Jan 2011 01:12:47 -0800 (PST)
>
> > in elisp doc for emacs 23.2, section on regex, it
> > it has a section that talks about multibyte chars.
>
> > is that info still correct?
>
> No.  Please submit a bug report.

Hi Eli,
thanks for confirmation. I filed a bug report now.

 Xah Lee