Hoogle Search

Within LTS Haskell 24.28 (ghc-9.10.3)

Note that Stackage only displays results for the latest LTS and Nightly snapshot. Learn more.

Exact lookup

1. mapExceptT :: (m (Either e a) -> n (Either e' b)) -> ExceptT e m a -> ExceptT e' n b

   dunai	Control.Monad.Trans.MSF.Except

   Map the unwrapped computation using the given function.

   • runExceptT (mapExceptT f m) = f
     (runExceptT m)

2. mapMSF :: forall (m :: Type -> Type) a b . Monad m => MSF m a b -> MSF m [a] [b]

   dunai	Control.Monad.Trans.MSF.List

   Apply an MSF to every input.

3. mapMaybeT :: (m (Maybe a) -> n (Maybe b)) -> MaybeT m a -> MaybeT n b

   dunai	Control.Monad.Trans.MSF.Maybe

   Transform the computation inside a MaybeT.

   • runMaybeT (mapMaybeT f m) = f (runMaybeT
     m)

4. mapRWS :: ((a, s, w) -> (b, s, w')) -> RWS r w s a -> RWS r w' s b

   dunai	Control.Monad.Trans.MSF.RWS

   Map the return value, final state and output of a computation using the given function.

   • runRWS (mapRWS f m) r s = f (runRWS m r
     s)

5. mapRWST :: (m (a, s, w) -> n (b, s, w')) -> RWST r w s m a -> RWST r w' s n b

   dunai	Control.Monad.Trans.MSF.RWS

   Map the inner computation using the given function.

   • runRWST (mapRWST f m) r s = f (runRWST m
     r s)

6. mapReader :: (a -> b) -> Reader r a -> Reader r b

   dunai	Control.Monad.Trans.MSF.Reader

   Transform the value returned by a Reader.

   • runReader (mapReader f m) = f .
     runReader m

7. mapReaderT :: (m a -> n b) -> ReaderT r m a -> ReaderT r n b

   dunai	Control.Monad.Trans.MSF.Reader

   Transform the computation inside a ReaderT.

   • runReaderT (mapReaderT f m) = f .
     runReaderT m

8. mapState :: ((a, s) -> (b, s)) -> State s a -> State s b

   dunai	Control.Monad.Trans.MSF.State

   Map both the return value and final state of a computation using the given function.

   • runState (mapState f m) = f . runState
     m

9. mapStateT :: (m (a, s) -> n (b, s)) -> StateT s m a -> StateT s n b

   dunai	Control.Monad.Trans.MSF.State

   Map both the return value and final state of a computation using the given function.

   • runStateT (mapStateT f m) = f .
     runStateT m

10. mapWriter :: ((a, w) -> (b, w')) -> Writer w a -> Writer w' b

    dunai	Control.Monad.Trans.MSF.Writer

    Map both the return value and output of a computation using the given function.

    • runWriter (mapWriter f m) = f (runWriter
      m)

Page 289 of many | Previous | Next