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From: David Kastrup <dak@gnu.org>
To: emacs-devel@gnu.org
Subject: Re: Guile in Emacs
Date: Wed, 10 Mar 2010 14:58:33 +0100	[thread overview]
Message-ID: <874okoqnw6.fsf@lola.goethe.zz> (raw)
In-Reply-To: 319D8F55-2225-449E-B9A6-0C41AF4B7EC4@raeburn.org

Ken Raeburn <raeburn@raeburn.org> writes:

> On Mar 9, 2010, at 11:22, Ted Zlatanov wrote:
>> Make sure you check out the emacs-mt work too at
>> http://gitorious.org/emacs-mt as that's (AFAIK) the closest to getting
>> into Emacs.  Giuseppe Scrivano has done great work.
>
> Ah, yes, I thought I might be forgetting someone.  (Sorry!)
> So many to keep track of... that's a *good* thing! :-)
>
>> Have you considered continuations support?  I didn't see mention of them
>> in the docs.
>
> Not even remotely, no. :-) I'm not particularly familiar with
> continuations in Scheme, let alone how you'd map that into elisp, or
> if the Lisp world has a similar construct....

Basically the idea (Chicken even implements it like that) is that you
never clean up your return stack, but treat it like a garbage-collected
heap.

Procedures are called implicitly with a pointer to the return stack.
When a procedure returns, it basically "calls" this pointer.  Now
call/cc does the same, but passes this pointer also _explicitly_ to the
procedure in question, which may store it someplace.  If at some later
point of time somebody calls this from wherever it may have been stored,
Scheme in effect returns "again" (if it did previously return) or for
the first time, abandoning the control flow it happened to be in at that
time (unless you stored its continuation somewhere else, of course).

-- 
David Kastrup





  reply	other threads:[~2010-03-10 13:58 UTC|newest]

Thread overview: 127+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <4B8147A9.7030504@gmail.com>
     [not found] ` <87ljemdzxo.fsf@stupidchicken.com>
2010-02-23  5:31   ` Next pretest, and branching plans Jason Rumney
2010-02-23 18:29     ` Eli Zaretskii
2010-02-23 21:12       ` Jason Rumney
2010-02-24  6:04     ` Richard Stallman
2010-02-24 13:34       ` Sean Sieger
2010-02-24 15:05         ` Davis Herring
2010-02-24 15:18           ` Sean Sieger
2010-02-24 14:05       ` Chong Yidong
2010-02-25 14:26         ` Richard Stallman
2010-02-26 18:03           ` manuals [was Re: Next pretest, and branching plans] Glenn Morris
2010-02-27  2:32             ` Richard Stallman
2010-02-27 16:52         ` Next pretest, and branching plans Johan Bockgård
2010-03-03  3:52           ` Glenn Morris
2010-03-05  0:31             ` Johan Bockgård
2010-03-05 19:50               ` integer overflow [was Re: Next pretest, and branching plans] Glenn Morris
2010-03-05 22:35                 ` integer overflow Stefan Monnier
2010-03-06  2:55                   ` Glenn Morris
2010-03-06  3:11                     ` Chong Yidong
2010-03-06  7:03                       ` Helmut Eller
2010-03-06 15:45                         ` Stefan Monnier
2010-03-06 16:23                           ` Davis Herring
2010-03-06 16:33                           ` Drew Adams
2010-03-07  7:52                             ` Richard Stallman
2010-03-07 16:06                               ` David Kastrup
2010-03-07 17:18                                 ` Stephen J. Turnbull
2010-03-07 17:42                                   ` David Kastrup
2010-03-08  4:49                                     ` Jay Belanger
2010-03-08  8:04                                 ` Richard Stallman
2010-03-08 14:41                                   ` Guile in Emacs (was: integer overflow) Ted Zlatanov
2010-03-08 17:32                                     ` Guile in Emacs Ted Zlatanov
2010-03-08 18:42                                     ` Guile in Emacs (was: integer overflow) Chad Brown
2010-03-09  7:07                                       ` Ken Raeburn
2010-03-09 16:22                                         ` Guile in Emacs Ted Zlatanov
2010-03-10  8:07                                           ` Ken Raeburn
2010-03-10 13:58                                             ` David Kastrup [this message]
2010-03-09  3:19                                     ` Guile in Emacs (was: integer overflow) Richard Stallman
2010-04-11 23:33                                       ` Thomas Lord
2010-04-12 12:30                                         ` Richard Stallman
2010-04-12 20:05                                           ` Thomas Lord
2010-04-13 12:44                                             ` Guile in Emacs Bruce Stephens
2010-04-13 15:51                                               ` Thomas Lord
2010-04-13 16:07                                                 ` Stefan Monnier
2010-04-13 18:56                                                   ` Thomas Lord
2010-04-13 19:22                                                     ` Christian Lynbech
2010-04-14 10:14                                                   ` Bruce Stephens
2010-04-14 14:10                                                   ` joakim
2010-04-13 19:13                                                 ` Christian Lynbech
2010-04-14  1:47                                                   ` Thomas Lord
2010-04-14  3:33                                                     ` Christian Lynbech
2010-04-14 23:33                                                       ` Richard Stallman
2010-04-14  5:02                                                   ` Richard Stallman
2010-04-14  6:45                                                     ` christian.lynbech
2010-04-14 19:07                                                       ` Thomas Lord
2010-04-14 19:34                                                         ` Bruce Stephens
2010-04-14 20:09                                                         ` Jose A. Ortega Ruiz
2010-04-15  7:34                                                         ` christian.lynbech
2010-04-14 23:33                                                       ` Richard Stallman
2010-04-15  3:52                                                         ` Drew Adams
2010-04-15  6:01                                                           ` David Kastrup
2010-04-15  6:54                                                             ` Drew Adams
2010-04-15 11:59                                                               ` Jeff Clough
2010-04-15 12:49                                                                 ` christian.lynbech
2010-04-15 13:54                                                                   ` Jeff Clough
2010-04-15 14:03                                                                     ` Lennart Borgman
2010-04-15 16:13                                                                     ` Drew Adams
2010-04-16 13:48                                                                       ` Jeff Clough
2010-04-16 14:03                                                                         ` christian.lynbech
2010-04-16 14:25                                                                           ` Jeff Clough
2010-04-16 14:25                                                                         ` Drew Adams
2010-04-16 14:39                                                                           ` David Kastrup
2010-04-16 14:40                                                                           ` Jeff Clough
2010-04-16  8:27                                                                     ` christian.lynbech
2010-04-17  4:41                                                                       ` Richard Stallman
2010-04-19  7:52                                                                         ` christian.lynbech
2010-04-16 22:29                                                                     ` Emacs Info manuals (was: Guile in Emacs) Juri Linkov
2010-04-15 16:11                                                                 ` Guile in Emacs Drew Adams
2010-04-15  7:21                                                             ` christian.lynbech
2010-04-15  7:36                                                               ` David Kastrup
2010-04-15  8:34                                                                 ` christian.lynbech
2010-04-15  9:06                                                                   ` David Kastrup
2010-04-15  9:45                                                                     ` Helmut Eller
2010-04-15 10:39                                                                     ` christian.lynbech
2010-04-15 18:47                                                           ` Richard Stallman
2010-04-15 22:42                                                             ` Harald Hanche-Olsen
2010-04-15 22:50                                                               ` Harald Hanche-Olsen
2010-04-17  4:40                                                                 ` Richard Stallman
2010-04-15 23:02                                                             ` Helmut Eller
2010-04-17  4:40                                                               ` Richard Stallman
2010-04-17  6:46                                                                 ` Helmut Eller
2010-04-17 19:55                                                                   ` Richard Stallman
2010-04-14 13:30                                                     ` John Wiegley
2010-04-14 14:18                                                       ` Helmut Eller
2010-04-14 15:40                                                       ` Tom Tromey
2010-04-14  7:51                                                   ` David Kastrup
2010-04-14  8:42                                                     ` christian.lynbech
2010-04-14  9:55                                                     ` immanuel litzroth
2010-04-14 10:28                                                       ` christian.lynbech
2010-04-14 11:25                                                         ` Stephen J. Turnbull
2010-04-14 12:26                                                           ` christian.lynbech
2010-04-14 16:49                                                             ` Ken Raeburn
2010-04-14 18:29                                                               ` Tom Tromey
2010-04-14 20:02                                                                 ` Ken Raeburn
2010-04-14 11:23                                                       ` Jeff Clough
2010-04-14 13:11                                                         ` Stephen J. Turnbull
2010-04-14 13:11                                                       ` Stephen Eilert
2010-04-14 13:49                                                         ` Helmut Eller
2010-04-14 15:47                                                     ` Tom Tromey
2010-04-14 16:41                                                       ` Drew Adams
2010-04-14 20:10                                                         ` David De La Harpe Golden
2010-04-15 10:38                                                       ` Leo
2010-03-06 19:04                           ` integer overflow Helmut Eller
2010-03-06 21:26                             ` Stefan Monnier
2010-03-07  7:51                           ` Richard Stallman
2010-03-07 19:05                       ` Johan Bockgård
2010-03-06 20:35                   ` Chong Yidong
2010-03-13  3:10     ` Next pretest, and branching plans Christoph
2010-03-13  7:42       ` Eli Zaretskii
2010-03-13 14:54         ` Christoph
2010-03-13 18:30       ` Stefan Monnier
2010-03-13 19:06         ` Eli Zaretskii
2010-03-14  2:38         ` Jason Rumney
2010-03-14  2:50           ` Christoph
2010-03-14  3:07             ` Jason Rumney
2010-03-14 17:55             ` Eli Zaretskii
2010-03-17  0:29               ` Christoph
2010-03-17  4:14                 ` Eli Zaretskii
2010-03-17 12:44                   ` Jason Rumney

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