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From: ludo@gnu.org (Ludovic Courtès)
To: guile-user@gnu.org
Subject: Re: Trigger action at exit?
Date: Sun, 02 Mar 2008 18:25:36 +0100	[thread overview]
Message-ID: <87ve459gxb.fsf@gnu.org> (raw)
In-Reply-To: 68dbb6fe0802291430g42240937u1241348a85021e73@mail.gmail.com

Hi,

"John Trammell" <johntrammell@gmail.com> writes:

> After a little searching I've stumbled across "add-hook! exit-hook
> ...", but for the life of me I can't seem to get it to do what I want.
>  Here's a taste of what I'm looking for:
>
>    (define foo (lambda () (display "foo") (newline)))
>    (add-hook! exit-hook foo)
>    (run-hook exit-hook)
>
> I'd like something like this, that doesn't need the explicit
> "run-hook" at the end.  Ideas?

`exit-hook' is only run by the REPL, so it's not useful in programs.

One possibility is to catch the `quit' exception:

  guile> (catch 'quit
           (lambda ()
             ;; the function that may `exit'
             (exit 1))
           (lambda (key . args)
             ;; the handler
             (format #t "quit: ~a~%" args)))
  quit: (1)

Thanks,
Ludovic.





  reply	other threads:[~2008-03-02 17:25 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-02-29 22:30 Trigger action at exit? John Trammell
2008-03-02 17:25 ` Ludovic Courtès [this message]
2008-03-03 20:44   ` Neil Jerram
2008-03-03 21:53     ` Ludovic Courtès
2008-03-03 22:17       ` Neil Jerram
2008-03-04 10:25         ` Ludovic Courtès
2008-03-04 17:03           ` John Trammell
2008-03-05 21:14           ` Neil Jerram
2008-03-03 21:22   ` John Trammell
2008-03-03 21:40     ` Ludovic Courtès
2008-03-03 22:27       ` John Trammell
2008-03-05 21:27         ` Neil Jerram

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