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From: Tomas Hlavaty <tom@logand.com>
To: Thomas Koch <thomas@koch.ro>,
	"emacs-devel@gnu.org" <emacs-devel@gnu.org>
Subject: Re: continuation passing in Emacs vs. JUST-THIS-ONE
Date: Sat, 25 Mar 2023 22:05:41 +0100	[thread overview]
Message-ID: <875yao1qze.fsf@logand.com> (raw)
In-Reply-To: <627090382.312345.1678539189382@office.mailbox.org>

On Sat 11 Mar 2023 at 14:53, Thomas Koch <thomas@koch.ro> wrote:
> TL;DR: (Why) is there no standard way for continuation passing
> style[1] ("event driven") programming in Emacs?

Asynchronous processes take callbacks as arguments.

> [1] https://debbugs.gnu.org/61350
> [2] https://debbugs.gnu.org/12145

The problem seems to be that an event was missed and emacs gets stuck
waiting in a loop.  It is essential in event driven edge trigered push
model not to miss events.

Moreover, it is a bad idea to loop or wait in filter callback.

> Because there is no such library in Emacs, people either write their
> own code for continuations (eglot?) or do too much work in a process
> filter function (speechd-el in 2004 which led to JUST-THIS-ONE).

Yeah, it looks like people tend to do too much stuff in filter
callbacks.  It is better to keep those simple and do any complex work
outside the callback.  The code could be written not to do too much work
in a process filter function even without such library.



  parent reply	other threads:[~2023-03-25 21:05 UTC|newest]

Thread overview: 53+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-03-11 12:53 continuation passing in Emacs vs. JUST-THIS-ONE Thomas Koch
2023-03-12  1:45 ` Jim Porter
2023-03-12  6:33   ` tomas
2023-03-14  6:39   ` Karthik Chikmagalur
2023-03-14 18:58     ` Jim Porter
2023-03-15 17:48       ` Stefan Monnier
2023-03-17  0:17         ` Tomas Hlavaty
2023-03-17  3:08           ` Stefan Monnier
2023-03-17  5:37             ` Jim Porter
2023-03-25 18:42             ` Tomas Hlavaty
2023-03-26 19:35               ` Tomas Hlavaty
2023-03-28  7:23                 ` Tomas Hlavaty
2023-03-29 19:00                 ` Stefan Monnier
2023-04-03  0:39                   ` Tomas Hlavaty
2023-04-03  1:44                     ` Emanuel Berg
2023-04-03  2:09                     ` Stefan Monnier
2023-04-03  4:03                       ` Po Lu
2023-04-03  4:51                         ` Jim Porter
2023-04-10 21:47                       ` Tomas Hlavaty
2023-04-11  2:53                         ` Stefan Monnier
2023-04-11 19:59                           ` Tomas Hlavaty
2023-04-11 20:22                             ` Stefan Monnier
2023-04-11 23:07                               ` Tomas Hlavaty
2023-04-12  6:13                                 ` Eli Zaretskii
2023-04-17 20:51                                   ` Tomas Hlavaty
2023-04-18  2:25                                     ` Eli Zaretskii
2023-04-18  5:01                                       ` Tomas Hlavaty
2023-04-18 10:35                                       ` Konstantin Kharlamov
2023-04-18 15:31                                         ` [External] : " Drew Adams
2023-03-29 18:47               ` Stefan Monnier
2023-04-17  3:46                 ` Lynn Winebarger
2023-04-17 19:50                   ` Stefan Monnier
2023-04-18  2:56                     ` Lynn Winebarger
2023-04-18  3:48                       ` Stefan Monnier
2023-04-22  2:48                         ` Lynn Winebarger
2023-04-18  6:19                     ` Jim Porter
2023-04-18  9:52                       ` Po Lu
2023-04-18 12:38                         ` Lynn Winebarger
2023-04-18 13:14                         ` Stefan Monnier
2023-04-19  0:28                           ` Basil L. Contovounesios
2023-04-19  2:59                             ` Stefan Monnier
2023-04-19 13:25                               ` [External] : " Drew Adams
2023-04-19 13:34                                 ` Robert Pluim
2023-04-19 14:19                                   ` Stefan Monnier
2023-04-21  1:33                                     ` Richard Stallman
2023-04-19  1:11                           ` Po Lu
2023-04-17 21:00                   ` Tomas Hlavaty
2023-03-14  3:58 ` Richard Stallman
2023-03-14  6:28   ` Jim Porter
2023-03-16 21:35 ` miha
2023-03-16 22:14   ` Jim Porter
2023-03-25 21:05 ` Tomas Hlavaty [this message]
2023-03-26 23:50 ` Tomas Hlavaty

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