Data.Comp.Multi.HTraversable

This module defines higher-order traversable functors.

Documentation

class HFoldable t => HTraversable t where

Methods

hmapM :: Monad m => NatM m a b -> NatM m (t a) (t b)

Map each element of a structure to a monadic action, evaluate these actions from left to right, and collect the results.

Alternative type in terms of natural transformations using functor composition :.::

hmapM :: Monad m => (a :-> m :.: b) -> t a :-> m :.: (t b)

htraverse :: Applicative f => NatM f a b -> NatM f (t a) (t b)

Instances

HTraversable f => HTraversable (Cxt h f)

HTraversable f => HTraversable ((:&:) * f a)

(HTraversable f, HTraversable g) => HTraversable ((:+:) * f g)