[Haskell-cafe] Instances for continuation-based FRP

[Conal Elliott]

Hi Jared,

Oh -- does Elm have a denotational semantics? I haven't heard of one. I
just now skimmed the informal description of the Signal
type<http://elm-lang.org/docs/Signal/Signal.elm>,
and from the reference to "updates" in the description of "merge", it sound
like whatever semantics it might have, it couldn't be function-of-time. I'm
intrigued with your interpretation. I wonder what it could mean for an
event to be a derivative, especially partial one, and for arbitrary types.

-- Conal


On Wed, Apr 24, 2013 at 1:48 PM, earl obscure <theanswertoproblems at gmail.com
> wrote:

> Hi Conal,
>
>
> Caveat pre-emptor I'm new to haskell, frp, etc.... ..  anyway how I was
> interpreting Elm's Eventbased strict FRP, was that each event was the
> partial derivative of the continuous time variable,  and then since it was
> being strict, it would evaluate the tangent line or state of the system at
> that point, only update when necessary.
>
>
> Now related to Continuations, this is something I've been thinking about
> as well,but haven't gotten very far; apparently cont monad, and comonad are
> closely related.  I was hoping to use the comonad rules, extend/duplicate
> to encode different continuations paths, and then extract when, a
> continuation path is chosen.  Was hoping maybe the analog would be PDE's,
> or something more general than my interpretation of Elm's FRP.
>
> These are just random thoughts that I wanted to get out. Thanks.
>
> Jared Nicholson.
>
>
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