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Re: "Missing" libraries/concepts found in other languages/ecosystems?
From: |
Chris Vine |
Subject: |
Re: "Missing" libraries/concepts found in other languages/ecosystems? |
Date: |
Tue, 14 Jul 2020 17:21:48 +0100 |
On Tue, 14 Jul 2020 12:32:46 +0200
Catonano <catonano@gmail.com> wrote:
> Il giorno dom 12 lug 2020 alle ore 21:33 Chris Vine <vine35792468@gmail.com>
> ha scritto:
> > On Sun, 12 Jul 2020 20:14:23 +0100
> > Chris Vine <vine35792468@gmail.com> wrote:
> > [snip]
> > > Secondly, if the handler returns and #:unwind? is set to #f then
> > > raise-continuable will return with the value returned by the handler.
> > > So this:
> > >
> > > (with-exception-handler
> > > (lambda (x) (+ x 3))
> > > (lambda () (+ (raise-continuable 10) 6)))
> >
> > Ah I see you are using (ice-9 exceptions). Better be consistent with this:
> >
> > (with-exception-handler
> > (lambda (x) (+ x 3))
> > (lambda () (+ (raise-exception 10 #:continuable? #t) 6))))
>
> I find this a little bit confusing, admittedly
>
> so is it
>
> #:unwind #f
>
> on with-exception-handler and
>
> #:continuable #t
>
> on raise exception ?
If you want a continuable exception then you don't unwind. If you
unwind there is no difference between a continuable exception and a
non-continuable one - you have unwound the stack and that's it.
If the exception is non-continuable (as most are), you must either
unwind, or you must in the exception handler re-raise the exception or
invoke your own continuation object.
- Re: "Missing" libraries/concepts found in other languages/ecosystems?, (continued)
- Re: "Missing" libraries/concepts found in other languages/ecosystems?, Chris Vine, 2020/07/13
- Re: "Missing" libraries/concepts found in other languages/ecosystems?, Catonano, 2020/07/12
- Re: "Missing" libraries/concepts found in other languages/ecosystems?, Catonano, 2020/07/12
- Re: "Missing" libraries/concepts found in other languages/ecosystems?, John Cowan, 2020/07/12
- Re: "Missing" libraries/concepts found in other languages/ecosystems?, Chris Vine, 2020/07/12
- Re: "Missing" libraries/concepts found in other languages/ecosystems?, Chris Vine, 2020/07/12
- Re: "Missing" libraries/concepts found in other languages/ecosystems?, Catonano, 2020/07/14
- Re: "Missing" libraries/concepts found in other languages/ecosystems?, Catonano, 2020/07/14
- Re: "Missing" libraries/concepts found in other languages/ecosystems?,
Chris Vine <=
- Re: "Missing" libraries/concepts found in other languages/ecosystems?, Zelphir Kaltstahl, 2020/07/12