Re: icomplete-mode deactivates region

[Ralf Angeli]

* Stefan Monnier (2005-03-21) writes:

>> icomplete-mode somehow deactivates an activated region when
>> transient-mark-mode is active.  In order to see this behavior, start
>> Emacs with `emacs -Q' and copy the following function into the
>> *scratch* buffer.
>
>> (defun foo ()
>>   (interactive)
>>   (icomplete-mode 1)
>>   (transient-mark-mode 1)
>>   (set-mark (point))
>>   (beginning-of-line 0))
>
> I must say I don't understand the above code.
> Does AUCTeX's code do something like the above?  If not, could you try to
> give a description closer to what AUCTeX does?

AUCTeX searches for the end of a LaTeX environment, sets mark there,
then searches for the start of the environment and leaves point there.

That means the interesting bits in the example above are these:

(set-mark (point))
(beginning-of-line 0))

... set the mark and move point.  (Using `push-mark' instead of
`set-mark' doesn't seem to make a difference.)

-- 
Ralf