question to pop-to-buffer

question to pop-to-buffer

[Klaus Berndl]

Hi,

the docstring of `pop-to-buffer':

pop-to-buffer is a built-in function.
(pop-to-buffer BUFFER &optional OTHER-WINDOW NORECORD)

...
This uses the function `display-buffer' as a subroutine; see the documentation
of `display-buffer' for additional customization information.
...

my question: Does pop-to-buffer use the lisp-version of display-buffer or the
C-version? I have adviced display-buffer but when i call pop-to-buffer then
this advice seems not to be called...Therefore my question above.

Thanks in advance!
Klaus


-- 
Klaus Berndl			mailto: klaus.berndl@sdm.de
sd&m AG				http://www.sdm.de
software design & management	
Thomas-Dehler-Str. 27, 81737 München, Germany
Tel +49 89 63812-392, Fax -220

Re: question to pop-to-buffer

[Eli Zaretskii]

> From: Klaus Berndl <klaus.berndl@sdm.de>
> Newsgroups: gnu.emacs.help
> Date: 28 Aug 2003 11:24:06 +0200
> 
> my question: Does pop-to-buffer use the lisp-version of display-buffer or the
> C-version?

display-buffer is itself a built-in function, which means there's
only a C version of it.

> I have adviced display-buffer but when i call pop-to-buffer then
> this advice seems not to be called...

You cannot advice built-in functions.

Re: question to pop-to-buffer

[Kevin Rodgers]

Eli Zaretskii wrote:

>>From: Klaus Berndl <klaus.berndl@sdm.de>
>>Newsgroups: gnu.emacs.help
>>Date: 28 Aug 2003 11:24:06 +0200
>>
>>my question: Does pop-to-buffer use the lisp-version of display-buffer or the
>>C-version?
> 
> display-buffer is itself a built-in function, which means there's
> only a C version of it.


More precisely: there's only a C implementation of it.  But there is a Lisp
binding as well.


>>I have adviced display-buffer but when i call pop-to-buffer then
>>this advice seems not to be called...
> 
> You cannot advice built-in functions.

Actually, you can, but it will only have an effect if the function is called

via its Lisp binding.  Since built-in functions almost always call other
built-in functions via their C binding, advising display-buffer will not
affect its behavior when it's called by pop-to-buffer.

-- 
Kevin Rodgers

Re: question to pop-to-buffer

[Klaus Berndl]

On Thu, 28 Aug 2003, Kevin Rodgers wrote:

>  Eli Zaretskii wrote:
>  
> >>From: Klaus Berndl <klaus.berndl@sdm.de>
> >>Newsgroups: gnu.emacs.help
> >>Date: 28 Aug 2003 11:24:06 +0200
> >>
> >>my question: Does pop-to-buffer use the lisp-version of display-buffer or
> >>the C-version?
> > display-buffer is itself a built-in function, which means there's
> > only a C version of it.
>  
>  
>  More precisely: there's only a C implementation of it.  But there is a Lisp
>  binding as well.
>  
>  
> >>I have adviced display-buffer but when i call pop-to-buffer then
> >>this advice seems not to be called...
> > You cannot advice built-in functions.
>  
>  Actually, you can, but it will only have an effect if the function is
>  called
>  
>  via its Lisp binding.  Since built-in functions almost always call other
>  built-in functions via their C binding, advising display-buffer will not
>  affect its behavior when it's called by pop-to-buffer.


Thanks, Kevin, this was exactly the answer i expect. I have already assumed
that but i wanted to get sure.

Klaus

-- 
Klaus Berndl			mailto: klaus.berndl@sdm.de
sd&m AG				http://www.sdm.de
software design & management	
Thomas-Dehler-Str. 27, 81737 München, Germany
Tel +49 89 63812-392, Fax -220