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RE: C-x a C-x C-h
From: |
Drew Adams |
Subject: |
RE: C-x a C-x C-h |
Date: |
Wed, 26 Aug 2009 15:35:30 -0700 |
> >> When I hit `C-x a C-x' in the latest Emacs, it awaits
> further input,
> >> as if it was a prefix key sequence. However, `C-x a C-x
> C-h' reveals
> >> that there are no commands bound to anything beginning with that
> >> prefix. Why?
> >
> > Good question. I wonder too. Same thing in Emacs 22, 21, and 20.
> > And C-x C-x C-x C-x C-x ... just keeps on keepin on.
>
> That doesn't happen here, it only gets to `C-x a C-x C-x', after which
> any further keypresses will say the sequence undefined.
I wasn't quite right.
On Emacs 20 and 21, you can just keep repeating C-x forever, with no apparent
effect.
On Emac 22 and 23, it seems that C-x a C-x C-x C-x calls
`exchange-point-and-mark', and every other `C-x' after that calls it again. So
here too I can keep repeating C-x C-x..., but each such pair invokes
`exchange-point-and-mark'.
Re: C-x a C-x C-h, Andreas Schwab, 2009/08/26