monad-ran-0.0.5: Implementations of common monads and monad transformers as right-kan extensions Source code Contents Index

Control.Monad.Ran.Writer

Documentation

newtype Writer w a Source

Constructors Writer getWriter :: forall o. (a -> w -> o) -> o Instances Monoid w => MonadWriter w (Writer w) Monoid w => Monad (Writer w) Functor (Writer w) Monoid w => Applicative (Writer w)

runWriter :: Writer w a -> (a, w) Source

data Writer' w a Source

Instances Monoid w => MonadWriter w (Writer' w) Monoid w => Monad (Writer' w) Monoid w => Functor (Writer' w) Monoid w => Applicative (Writer' w)

runWriter' :: Monoid w => Writer' w a -> (a, w) Source

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