Re: Recentish C-s M-y change

[Gregory Heytings]

> > Would it not be possible to use C-u to have both behaviors?  With the 
> > following code C-s C-y M-y... and C-s M-y M-y... work as before, and 
> > C-s C-u C-y and C-s C-u M-y use the new feature.
>
> Looks overly complex

What is "overly complex"?  The "u" and "y" keys are next to each other on 
most keyboards.

There are not many possible solutions if we want to make that new feature, 
which I think is a useful one, accessible without changing the keymap too 
much.  C-y, M-y and C-M-y are already bound.  Using TAB as you suggested 
does not seem to be a good solution, newcomers would have to learn that 
searching for TAB requires a C-q.

Another solution would be to use C-S-y or M-S-y.

But I do believe that C-u is better, the universal argument is commonly 
used to select between different behaviors in Emacs, and is in particular 
already used to start a regexp isearch and a regular isearch.

> and currently "sub-commands" (bound to keys in isearch-mode-map) do not 
> use universal arg AFAICT.

That's not correct.  C-s C-u C-q C-i searches for four consecutive tabs, 
for example; C-s C-u 6 C-w starts isearch with the next six words.