@Jerzy here's (perhaps an unneeded) clarification just in case it helps:
Matthias said initially in a set theoretic type system continuations could
be considered as having the empty set as their return _type_ (not value) --
or in other words, their return type would be the empty type, or bottom
(wh
> On Aug 30, 2016, at 3:22 AM, Jerzy Karczmarczuk
> wrote:
>
> Could anybody justify this convention?
Here the empty set represents the set of all possible result values. That’s a
meta-set or a set about things in the language.
> An empty set is a legitimate piece of data.
If you wanted
The reason the first one doesn't work is that the type checker has
figured out that the variable is mutable and HASN"T figured out that
there are no other threads around that could mutate it. In the second
case, it knows there are no other threads around to mutate it because
even if there were othe
> On Aug 30, 2016, at 2:08 AM, Sourav Datta wrote:
>
> I tried this approach with Racket 6.5 and still get the type checker error
> when trying to call the continuation after it has been set.
>
> #lang typed/racket
>
> (define-type EmptySet (U))
>
> (: d-or-s (U False (-> Number EmptySet)))
Le 30/08/2016 à 02:26, Hendrik Boom a écrit :
On Mon, Aug 29, 2016 at 04:33:15PM -0400, Matthias Felleisen wrote:
Continuations don’t return. In a set-oriented type system this means their
result type is the empty set:
I tried, but failed, to get this convention into Algol 68 for
functinos tha
I tried this approach with Racket 6.5 and still get the type checker error when
trying to call the continuation after it has been set.
#lang typed/racket
(define-type EmptySet (U))
(: d-or-s (U False (-> Number EmptySet)))
(define d-or-s #f)
(: double-or-same (-> Number Number))
(define (d
On Mon, Aug 29, 2016 at 04:33:15PM -0400, Matthias Felleisen wrote:
>
> Continuations don’t return. In a set-oriented type system this means their
> result type is the empty set:
I tried, but failed, to get this convention into Algol 68 for
functinos that don't return.
-- hendrik
--
You rec
Continuations don’t return. In a set-oriented type system this means their
result type is the empty set:
#lang typed/racket
(define-type EmptySet (U))
(: d-or-s (U False (-> Number EmptySet)))
(define d-or-s #f)
(: double-or-same (-> Number Number))
(define (double-or-same x)
(call/cc (lamb
Hey everyone,
I am a beginner in Racket and recently learned the basic concepts of
continuations. I like Racket's support of multiple types of continuations as
opposed one type in Scheme. Recently I also started learning about typed
Racket. My problem is, I am not sure how I can annotate a cont
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