Alfonso Acosta wrote: > 2) Think of a change in the internal representation of signals which > made polymorphic processes possible. Polymorphic processes don't have > to > be necessarily definable by the user. They should be happy enough > with a few polymorphic primitives (mapSnd would be one of them).
I am not sure if this is applicable to your problem, but in GHC you can wrap polymorphic values in a newtype using higher-rank polymorphism, like in newtype WrapId = WrapId { unWrapId :: (forall a. a -> a) } deriving Typeable You can then use toDyn . WrapId to wrap 'id' into a Dynamic and unWrapId . flip fromDyn (error "wrong type") to unwrap it. Cheers Ben _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe