Re: Redo/Undo (was: etags: M-. jump to the tag(called func), ...)

[B. Smith]

On Sep 18, 2005, at 03:05, Ilya Zakharevich wrote:

> And judging from your reply, still no 'redo' functionality, right?

Redo, as in the opposite of Undo, yes? (i.e. not as in repeat-complex- 
command.)

There is redo functionality it just doesn't present itself as a  
separate action. If you interrupt a series of undo operations with an  
editing operation, you'll find that the behavior of undo changes: it  
first undoes the interrupting edit, then undoes the undo operations  
(i.e. "redo"). Once it's reached the end of the undo history, it  
reverts to "normal" undo behavior.  Give it a try.  It's easier to  
observe than explain.

I've gotten so used to it that I don't even notice it when I'm using  
emacs anymore, though I confess I don't have as clear a mental model  
of what's going on as I'd like --  at least not clear enough to be  
able to draw a little ascii-art diagram.  Might be a nice addition to  
emacs info. Perhaps someone can explain the idea behind this behavior  
to me in such a way that I can draw a picture.


// Ben