bug#68958: [PATCH] Support bookmarking Xref results buffers

[Juri Linkov]

>> I once tried to use 'revert-buffer-function' to restore
>> xref buffers from the desktop, but abandoned the idea.
>> Not because xref.el doesn't set 'revert-buffer-function'.
>> But because it would take too much time to restore
>> the desktop while it will rerun all saved xref buffers.
>> OTOH, saving an xref bookmark makes more sense.
>> And probably your patch will help to implement
>> 'revert-buffer-function' for xref as well.
>
> I don't think bookmark would save the whole buffer contents. Would it?
> Otherwise, re-running the search(es) seems inevitable.

Indeed, saving the buffer contents of transient buffers
either to the bookmark or to the desktop makes no sense.
So re-running the command is inevitable.

But then I can't imagine how would it be possible
to move point to its saved location when initially
a restored buffer is empty before re-running the command.