Re: Tree-sitter introduction documentation

[Yuan Fu]

> On Jan 1, 2023, at 4:40 PM, Stefan Monnier <monnier@iro.umontreal.ca> wrote:
> 
>>>>> I think we should default to asynchonous operations as much as possible.
>>>> If you are talking about the whole command, maybe. Does call-process
>>>> automatically yield when ran in a make-thread?
>>> No, it doesn't.  And it's threads that yield, not Emacs primitives.  A
>>> thread will yield when it calls some API that invokes pselect.
>> Thanks. I guess what I’m asking is that if I run the command in make-thread,
>> will the thread yield when it’s waiting for the subprocess? I tried it and
>> it still blocks Emacs so I guess the answer is no. But maybe I’m doing
>> it wrong.
> 
> No, indeed by "asynchronous" I wasn't thinking of using threads, but
> rather using `start-process` and then putting the "rest" into its
> sentinel.
> 
> It's rather cumbersome to do, admittedly.
> I have a work-in-progress library of "promises/futures" for Emacs which
> should (eventually) make it easier, but that's not an option for the
> `emacs-29` branch :-(

Oh cool. This would have made some of my packages easier to write :-) I wish 
there’s also something like emacs-async: spawn a separate interpreter process, 
do some computations and return the result.

Yuan