What's the deal with character classes in regexps?

What's the deal with character classes in regexps?

[David Kastrup]

If I do
C-u C-s [:ascii:]

I get matches for :, a, s, c and i.

That does not jibe with

(info "(elisp) Char Classes")

which is explicitly mentioned in

(info "(elisp) Regexp Special")

How come we have this feature _documented_ in full detail, but not
implemented?

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum

Re: What's the deal with character classes in regexps?

[Sven Joachim]

David Kastrup <dak@gnu.org> writes:

> If I do
> C-u C-s [:ascii:]
>
> I get matches for :, a, s, c and i.

You need to search for [[:ascii:]] instead.

What's the deal with character classes in regexps?

[Stephen J. Turnbull]

David Kastrup writes:

 > If I do
 > C-u C-s [:ascii:]

AIUI the delimiters for such symbols are [: and :].  To specify a
character class containing exactly the ASCII repertoire, use [[:ascii:]].

Re: What's the deal with character classes in regexps?

[David Hansen]

On Sat, 11 Aug 2007 10:56:50 +0200 David Kastrup wrote:

> If I do
> C-u C-s [:ascii:]
>
> I get matches for :, a, s, c and i.

Try [[:ascii:]] instead.

David

Re: What's the deal with character classes in regexps?

[David Kastrup]

"Stephen J. Turnbull" <stephen@xemacs.org> writes:

> David Kastrup writes:
>
>  > If I do
>  > C-u C-s [:ascii:]
>
> AIUI the delimiters for such symbols are [: and :].  To specify a
> character class containing exactly the ASCII repertoire, use [[:ascii:]].

Ah, ok.

Sorry for the noise.

-- 
David Kastrup, Kriemhildstr. 15, 44793 Bochum

Re: What's the deal with character classes in regexps?

[Werner LEMBERG]

> >  > If I do
> >  > C-u C-s [:ascii:]
> >
> > AIUI the delimiters for such symbols are [: and :].  To specify a
> > character class containing exactly the ASCII repertoire, use
> > [[:ascii:]].
> 
> Ah, ok.
> 
> Sorry for the noise.

It seems that special syntax deserves an example in the manual...


    Werner