[Haskell-cafe] manage effects in a DSL

[Jacques Carette]

The simplest way would be to add a phantom type parameter to Exp, i.e.
data Exp e a where

The 'e' variable would be used to track (and propagate) effects. It is 
then up to you to design your 'effect system' as you wish.

Jacques

On 2014-01-28 6:03 AM, Corentin Dupont wrote:
> -> In short, my question is: how can I semantically separate 
> instructions with effect from the others? i.e. how can I mark down and 
> track those effects?

> This is the DSL:
>
> > data Exp a where
> >   ReadAccount  :: Exp Int
> >   WriteAccount :: Exp Int -> Exp ()
> >   SetVictory   :: Exp Bool -> Exp ()
> >   OnTimer      :: Exp () -> Exp ()
> >   Return       :: a -> Exp a
> >   Bind         :: Exp a -> (a -> Exp b) -> Exp b
>

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