bug#23632: 25.1.50; Gratuitous undo boundary in latex-insert-block

["Phillip Lord" <phillip.lord@russet.org.uk>]

On Sat, June 4, 2016 5:49 pm, Stefan Monnier wrote:
>> Yes. This is assuming that commands *both* change recursion depth *and*
>>  change a buffer.
>
> Yes, it's like a fairly rare occurrence, where a command does both:
> - modify some buffer(s)
> - exit a recursive edit
> So maybe we can live without paying attention to it.
>
>
>>>> -- once when we capture the undoable changes (which happens
>>>> often) and once on at the end of each command.
>>> Right.  I see no need for any changes there.
>>>
>> Really? I have to know the recursion depth at this point
>>
>
> No, let-bind the var to nil around each recursive edit should take care
> of "everything" so you don't need to change anything else (including, non
> need to pay any attention to the recursion depth).
>
>> To be clear, though, to do this I need to augment recursive-edit in C?
>> I
>> need the let binding to last the life of the recursive edit?
>
> That's right.  A call to `specbind' at the right spot might even be all
> it takes.

Okay, I will take a good look -- I've not done this before, but can try.

I guess "recursive-edit" is the only way to enter a recursive edit?