Comments (2)
How would you write the type signature?
implicit def effTraverse[R : TraverseFx]: Traverse[Eff[R, ?]] = new Traverse[Eff[R, ?]] {
def traverse[G[_]: Applicative, A, B](fa: Eff[R, A])(f: A => G[B]): G[Eff[R, B]] = ???
}
/**
* can we get the Traverse instances for individual effects like that?
*/
trait TraverseFx[R <: Fx] {
type H[_] <: Fx
type T <: Fx
def traverse: Traverse[H]
def traverseFx: TraverseFx[T]
}
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I'm closing this for now, please re-open if there is some interest again.
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