[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: (other-window) with negative argument
From: |
Stephen Berman |
Subject: |
Re: (other-window) with negative argument |
Date: |
Fri, 21 Dec 2018 18:39:28 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.0.50 (gnu/linux) |
On Fri, 21 Dec 2018 17:55:23 +0100 dieter@duenenhof-wilhelm.de (H. Dieter
Wilhelm) wrote:
> Hello ()
>
> I can't get a function to work with a negative argument of
> (other-window). When I'm using (other-window -1) in the *scratch*
> buffer it is working as expected, as soon as I put it into a function
> like the following
>
> (defun previous-window ()
> (other-window -1))
>
> or
>
> (defun previous-window ()
> "blabla"
> (interactive)
> (other-window -1))
>
> and activate the function any call to (other-window -1) is opening the
> debugger!
>
> What am I doing wrong?
Redefining a function, previous-window, which is a primitive Emacs
function defined in C. When other-window has a negative argument, it
calls the built-in previous-window with three arguments, which are
optional in the built-in version, and since your redefinition takes no
arguments, this raises the error. If you name your function
e.g. my-previous-window, it will work as you expect.
Steve Berman