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Re: switch-to-buffer: for interactive use only

From: Štěpán Němec
Subject: Re: switch-to-buffer: for interactive use only
Date: Thu, 07 Jul 2011 11:19:53 +0200
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/24.0.50 (gnu/linux)

Chong Yidong <address@hidden> writes:

> Stefan Monnier <address@hidden> writes:
>>> Was it really necessary to mark switch-to-buffer "for interactive use
>>> only"? It's a pretty basic command that was used in ~ 800 places in the
>>> Emacs 23.3 sources.
>> Most of those calls were bugs waiting to catch you in Emacs<23 ("you"
>> being typically a user like myself who uses dedicated windows and/or
>> minibuffer-only frames).
> How would you change this?
> (defun unbury-buffer ()
>   "Switch to the last buffer in the buffer list."
>   (interactive)
>   (switch-to-buffer (last-buffer)))

FWIW, I don't have an opinion on whether marking `switch-to-buffer'
interactive-only makes sense or not, but I don't think the above is a
valid argument either way -- the fact that a function is marked
interactive only (and a compiler warning is produced) does IMO not mean
there are no valid uses from Lisp code -- there are cases where the
interactive behaviour is precisely what you want, and the function above
is one such example. It's similar to using commands like `next-line' or
`beginning-of-buffer' from another command that e.g. functions as a
dispatcher among multiple commands or only slightly modifies the
interactive behaviour (e.g. by fixing one of the arguments, as is the
case with your function).


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