mtl-2.2.2: Monad classes, using functional dependencies

Copyright(c) Andy Gill 2001
(c) Oregon Graduate Institute of Science and Technology 2001
LicenseBSD-style (see the file LICENSE)
Maintainerlibraries@haskell.org
Stabilityexperimental
Portabilityportable
Safe HaskellSafe
LanguageHaskell2010

Control.Monad.List

Description

The List monad.

Synopsis

Documentation

newtype ListT (m :: Type -> Type) a Source #

Parameterizable list monad, with an inner monad.

Note: this does not yield a monad unless the argument monad is commutative.

Constructors

ListT 

Fields

Instances
MonadTrans ListT 
Instance details

Defined in Control.Monad.Trans.List

Methods

lift :: Monad m => m a -> ListT m a Source #

MonadError e m => MonadError e (ListT m) Source # 
Instance details

Defined in Control.Monad.Error.Class

Methods

throwError :: e -> ListT m a Source #

catchError :: ListT m a -> (e -> ListT m a) -> ListT m a Source #

MonadReader r m => MonadReader r (ListT m) Source # 
Instance details

Defined in Control.Monad.Reader.Class

Methods

ask :: ListT m r Source #

local :: (r -> r) -> ListT m a -> ListT m a Source #

reader :: (r -> a) -> ListT m a Source #

MonadState s m => MonadState s (ListT m) Source # 
Instance details

Defined in Control.Monad.State.Class

Methods

get :: ListT m s Source #

put :: s -> ListT m () Source #

state :: (s -> (a, s)) -> ListT m a Source #

Monad m => Monad (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

(>>=) :: ListT m a -> (a -> ListT m b) -> ListT m b Source #

(>>) :: ListT m a -> ListT m b -> ListT m b Source #

return :: a -> ListT m a Source #

fail :: String -> ListT m a Source #

Functor m => Functor (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

fmap :: (a -> b) -> ListT m a -> ListT m b Source #

(<$) :: a -> ListT m b -> ListT m a Source #

MonadFix m => MonadFix (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

mfix :: (a -> ListT m a) -> ListT m a Source #

Monad m => MonadFail (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

fail :: String -> ListT m a Source #

Applicative m => Applicative (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

pure :: a -> ListT m a Source #

(<*>) :: ListT m (a -> b) -> ListT m a -> ListT m b Source #

liftA2 :: (a -> b -> c) -> ListT m a -> ListT m b -> ListT m c Source #

(*>) :: ListT m a -> ListT m b -> ListT m b Source #

(<*) :: ListT m a -> ListT m b -> ListT m a Source #

Foldable f => Foldable (ListT f) 
Instance details

Defined in Control.Monad.Trans.List

Methods

fold :: Monoid m => ListT f m -> m Source #

foldMap :: Monoid m => (a -> m) -> ListT f a -> m Source #

foldr :: (a -> b -> b) -> b -> ListT f a -> b Source #

foldr' :: (a -> b -> b) -> b -> ListT f a -> b Source #

foldl :: (b -> a -> b) -> b -> ListT f a -> b Source #

foldl' :: (b -> a -> b) -> b -> ListT f a -> b Source #

foldr1 :: (a -> a -> a) -> ListT f a -> a Source #

foldl1 :: (a -> a -> a) -> ListT f a -> a Source #

toList :: ListT f a -> [a] Source #

null :: ListT f a -> Bool Source #

length :: ListT f a -> Int Source #

elem :: Eq a => a -> ListT f a -> Bool Source #

maximum :: Ord a => ListT f a -> a Source #

minimum :: Ord a => ListT f a -> a Source #

sum :: Num a => ListT f a -> a Source #

product :: Num a => ListT f a -> a Source #

Traversable f => Traversable (ListT f) 
Instance details

Defined in Control.Monad.Trans.List

Methods

traverse :: Applicative f0 => (a -> f0 b) -> ListT f a -> f0 (ListT f b) Source #

sequenceA :: Applicative f0 => ListT f (f0 a) -> f0 (ListT f a) Source #

mapM :: Monad m => (a -> m b) -> ListT f a -> m (ListT f b) Source #

sequence :: Monad m => ListT f (m a) -> m (ListT f a) Source #

Contravariant m => Contravariant (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

contramap :: (a -> b) -> ListT m b -> ListT m a Source #

(>$) :: b -> ListT m b -> ListT m a Source #

Eq1 m => Eq1 (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

liftEq :: (a -> b -> Bool) -> ListT m a -> ListT m b -> Bool Source #

Ord1 m => Ord1 (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

liftCompare :: (a -> b -> Ordering) -> ListT m a -> ListT m b -> Ordering Source #

Read1 m => Read1 (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

liftReadsPrec :: (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (ListT m a) Source #

liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [ListT m a] Source #

liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (ListT m a) Source #

liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [ListT m a] Source #

Show1 m => Show1 (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> ListT m a -> ShowS Source #

liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [ListT m a] -> ShowS Source #

MonadZip m => MonadZip (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

mzip :: ListT m a -> ListT m b -> ListT m (a, b) Source #

mzipWith :: (a -> b -> c) -> ListT m a -> ListT m b -> ListT m c Source #

munzip :: ListT m (a, b) -> (ListT m a, ListT m b) Source #

MonadIO m => MonadIO (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

liftIO :: IO a -> ListT m a Source #

Applicative m => Alternative (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

empty :: ListT m a Source #

(<|>) :: ListT m a -> ListT m a -> ListT m a Source #

some :: ListT m a -> ListT m [a] Source #

many :: ListT m a -> ListT m [a] Source #

Monad m => MonadPlus (ListT m) 
Instance details

Defined in Control.Monad.Trans.List

Methods

mzero :: ListT m a Source #

mplus :: ListT m a -> ListT m a -> ListT m a Source #

MonadCont m => MonadCont (ListT m) Source # 
Instance details

Defined in Control.Monad.Cont.Class

Methods

callCC :: ((a -> ListT m b) -> ListT m a) -> ListT m a Source #

(Eq1 m, Eq a) => Eq (ListT m a) 
Instance details

Defined in Control.Monad.Trans.List

Methods

(==) :: ListT m a -> ListT m a -> Bool Source #

(/=) :: ListT m a -> ListT m a -> Bool Source #

(Ord1 m, Ord a) => Ord (ListT m a) 
Instance details

Defined in Control.Monad.Trans.List

Methods

compare :: ListT m a -> ListT m a -> Ordering Source #

(<) :: ListT m a -> ListT m a -> Bool Source #

(<=) :: ListT m a -> ListT m a -> Bool Source #

(>) :: ListT m a -> ListT m a -> Bool Source #

(>=) :: ListT m a -> ListT m a -> Bool Source #

max :: ListT m a -> ListT m a -> ListT m a Source #

min :: ListT m a -> ListT m a -> ListT m a Source #

(Read1 m, Read a) => Read (ListT m a) 
Instance details

Defined in Control.Monad.Trans.List

(Show1 m, Show a) => Show (ListT m a) 
Instance details

Defined in Control.Monad.Trans.List

Methods

showsPrec :: Int -> ListT m a -> ShowS Source #

show :: ListT m a -> String Source #

showList :: [ListT m a] -> ShowS Source #

mapListT :: (m [a] -> n [b]) -> ListT m a -> ListT n b Source #

Map between ListT computations.