Control.Comonad.Traced.MemoTrie

The trace comonad transformer (aka the cowriter or exponential comonad transformer).

Traced comonad

type Traced m = TracedT m Identity

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

runTraced :: HasTrie m => Traced m a -> m -> a

Traced comonad transformer

newtype TracedT m w a

Constructors

TracedT (w (m :->: a))

Instances

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

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

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

(Semigroup m, Monoid m, HasTrie m) => ComonadHoist (TracedT m)

(Semigroup m, Monoid m, HasTrie m) => ComonadTrans (TracedT m)

(Functor w, HasTrie m) => Functor (TracedT m w)

(Typeable s, Typeable1 w) => Typeable1 (TracedT s w)

(Applicative w, HasTrie m) => Applicative (TracedT m w)

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

(Extend w, Semigroup m, HasTrie m) => Extend (TracedT m w)

(Apply w, HasTrie m) => Apply (TracedT m w)

Operations

trace :: ComonadTraced m w => forall a. m -> w a -> a

listen :: (Functor w, HasTrie m) => TracedT m w a -> TracedT m w (a, m)

listens :: (Functor w, HasTrie m) => (m -> b) -> TracedT m w a -> TracedT m w (a, b)

censor :: (Functor w, HasTrie m) => (m -> m) -> TracedT m w a -> TracedT m w a