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Re: How to use describe-key with multi-key sequences?

From: Michael Slass
Subject: Re: How to use describe-key with multi-key sequences?
Date: Thu, 14 Nov 2002 18:50:27 GMT
User-agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.2

bill <> writes:

>How can one describe-key with "compound commands" such as "C-u f" in
>mail-mode?  If I try C-h k C-u f, I get the description of C-u, not
>the description of C-u f...
>Thanks in advance!

C-u runs universal-prefix-arg.  What you want to do is to get the
description of the function run by the key "f", and read that to see
how the behavior is modified by a prefix arg.  For example to see what
happens with C-u M-; ...   

C-h k M-;

| M-; runs the command comment-dwim
|    which is an interactive compiled Lisp function in `newcomment'.
| (comment-dwim ARG)
| Call the comment command you want (Do What I Mean).
| If the region is active and `transient-mark-mode' is on, call
|   `comment-region' (unless it only consists of comments, in which
|   case it calls `uncomment-region').
| Else, if the current line is empty, insert a comment and indent it.
| Else if a prefix ARG is specified, call `comment-kill'.
| Else, call `comment-indent'.

This tells me that M-; runs comment-dwim (do what i mean).  The second
line up from the bottom says that with a prefix arg (meaning that I
hit C-u first), it will run comment-kill instead.

Mike Slass

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