Do POSIX classes work in regular expression searches?

Do POSIX classes work in regular expression searches?

[Mark S]

I've been trying to do some simple searches like:

  (query-replace-regexp "<span[:ascii:]*?</span>+" "test")


or even the simpler

  (query-replace-regexp "[:ascii:]*" "test")

and not getting anywhere. Emacs just looks for the characters ":acis" --  
not for the POSIX character set of all ASCII characters. Trying it with  
other sets also got me nowhere. These character classes are listed in the  
Emacs documentation -- is there a trick to getting them to work?

Thanks,
Mark

GNU Emacs 23.2.1 (i386-mingw-nt5.1.2600)
  of 2010-05-08 on G41R2F1

Re: Do POSIX classes work in regular expression searches?

[Perry Smith]

On Jul 22, 2011, at 8:12 PM, Mark S wrote:

> 
> I've been trying to do some simple searches like:
> 
> (query-replace-regexp "<span[:ascii:]*?</span>+" "test")
> 
> 
> or even the simpler
> 
> (query-replace-regexp "[:ascii:]*" "test")
> 
> and not getting anywhere. Emacs just looks for the characters ":acis" -- not for the POSIX character set of all ASCII characters. Trying it with other sets also got me nowhere. These character classes are listed in the Emacs documentation -- is there a trick to getting them to work?

Looks like you need two sets of brackets?

[[:ascii:]]*

Re: Do POSIX classes work in regular expression searches?

[Mark S]

Thanks Perry!

I suppose this was obvious to everyone, but I really didn't see it in the  
documentation -- or even an example of usage.

Thanks again!
Mark

On Jul 22, 4:24 pm, Perry Smith <pedz...@gmail.com> wrote:
> On Jul 22, 2011, at 8:12 PM, Mark S wrote:
>> I've been trying to do some simple searches like:
>> (query-replace-regexp "<span[:ascii:]*?</span>+" "test")
>> or even the simpler
>> (query-replace-regexp "[:ascii:]*" "test")
>> and not getting anywhere. Emacs just looks for the characters ":acis"  
> -- not for the POSIX character set of all ASCII characters. Trying it  
> with other sets also got me nowhere. These character classes are listed  
> in the Emacs documentation -- is there a trick to getting them to work?
>Looks like you need two sets of brackets?
>[[:ascii:]]*


m/mail/

Re: Do POSIX classes work in regular expression searches?

[Andreas Röhler]

Am 23.07.2011 05:19, schrieb Mark S:
>
> Thanks Perry!
>
> I suppose this was obvious to everyone, but I really didn't see it in
> the documentation -- or even an example of usage.
>
> Thanks again!
> Mark
>
> On Jul 22, 4:24 pm, Perry Smith <pedz...@gmail.com> wrote:
>> On Jul 22, 2011, at 8:12 PM, Mark S wrote:
>>> I've been trying to do some simple searches like:
>>> (query-replace-regexp "<span[:ascii:]*?</span>+" "test")
>>> or even the simpler
>>> (query-replace-regexp "[:ascii:]*" "test")
>>> and not getting anywhere. Emacs just looks for the characters ":acis"
>> -- not for the POSIX character set of all ASCII characters. Trying it
>> with other sets also got me nowhere. These character classes are
>> listed in the Emacs documentation -- is there a trick to getting them
>> to work?
>> Looks like you need two sets of brackets?
>> [[:ascii:]]*
>

you may understand the inner bracketed-form like an equivalent to "a-zA-Z"

you may write for example

[[:ascii:]ÄÖÜaöü]*

in order to cover german umlauts too