Control.Comonad.Traced

ComonadTraced class

class Comonad w => ComonadTraced m w | w -> m where

Methods

trace :: m -> w a -> a

Instances

ComonadTraced m w => ComonadTraced m (IdentityT w)

Monoid m => ComonadTraced m ((->) m)

ComonadTraced m w => ComonadTraced m (StoreT s w)

ComonadTraced m w => ComonadTraced m (EnvT e w)

(Comonad w, Monoid m) => ComonadTraced m (TracedT m w)

traces :: ComonadTraced m w => (a -> m) -> w a -> a

The Traced comonad

type Traced m = TracedT m Identity

traced :: (m -> a) -> Traced m a

runTraced :: Traced m a -> m -> a

The TracedT comonad transformer

newtype TracedT m w a

Constructors

TracedT

Fields

runTracedT :: w (m -> a)

Instances

(ComonadEnv e w, Monoid m) => ComonadEnv e (TracedT m w)

(ComonadStore s w, Monoid m) => ComonadStore s (TracedT m w)

(Comonad w, Monoid m) => ComonadTraced m (TracedT m w)

Monoid m => ComonadTrans (TracedT m)

ComonadHoist (TracedT m)

Functor w => Functor (TracedT m w)

Applicative w => Applicative (TracedT m w)

Distributive w => Distributive (TracedT m w)

(ComonadApply w, Monoid m) => ComonadApply (TracedT m w)

(Comonad w, Monoid m) => Comonad (TracedT m w)

Re-exported modules

module Control.Comonad

module Control.Comonad.Trans.Class

module Data.Monoid