Data.Functor.Reverse

Making functors whose elements are notionally in the reverse order from the original functor.

Documentation

newtype Reverse f a

The same functor, but with Foldable and Traversable instances that process the elements in the reverse order.

Constructors

Reverse

Fields

• getReverse :: f a

Instances

Monad m => Monad (Reverse m)

Derived instance.

Defined in Data.Functor.Reverse

Methods

(>>=) :: Reverse m a -> (a -> Reverse m b) -> Reverse m b

(>>) :: Reverse m a -> Reverse m b -> Reverse m b

return :: a -> Reverse m a

fail :: String -> Reverse m a

Functor f => Functor (Reverse f)

Derived instance.

Defined in Data.Functor.Reverse

Methods

fmap :: (a -> b) -> Reverse f a -> Reverse f b

(<$) :: a -> Reverse f b -> Reverse f a

MonadFail m => MonadFail (Reverse m)

Defined in Data.Functor.Reverse

Methods

fail :: String -> Reverse m a

Applicative f => Applicative (Reverse f)

Derived instance.

Defined in Data.Functor.Reverse

Methods

pure :: a -> Reverse f a

(<*>) :: Reverse f (a -> b) -> Reverse f a -> Reverse f b

liftA2 :: (a -> b -> c) -> Reverse f a -> Reverse f b -> Reverse f c

(*>) :: Reverse f a -> Reverse f b -> Reverse f b

(<*) :: Reverse f a -> Reverse f b -> Reverse f a

Foldable f => Foldable (Reverse f)

Fold from right to left.

Defined in Data.Functor.Reverse

Methods

fold :: Monoid m => Reverse f m -> m

foldMap :: Monoid m => (a -> m) -> Reverse f a -> m

foldr :: (a -> b -> b) -> b -> Reverse f a -> b

foldr' :: (a -> b -> b) -> b -> Reverse f a -> b

foldl :: (b -> a -> b) -> b -> Reverse f a -> b

foldl' :: (b -> a -> b) -> b -> Reverse f a -> b

foldr1 :: (a -> a -> a) -> Reverse f a -> a

foldl1 :: (a -> a -> a) -> Reverse f a -> a

toList :: Reverse f a -> [a]

null :: Reverse f a -> Bool

length :: Reverse f a -> Int

elem :: Eq a => a -> Reverse f a -> Bool

maximum :: Ord a => Reverse f a -> a

minimum :: Ord a => Reverse f a -> a

sum :: Num a => Reverse f a -> a

product :: Num a => Reverse f a -> a

Traversable f => Traversable (Reverse f)

Traverse from right to left.

Defined in Data.Functor.Reverse

Methods

traverse :: Applicative f0 => (a -> f0 b) -> Reverse f a -> f0 (Reverse f b)

sequenceA :: Applicative f0 => Reverse f (f0 a) -> f0 (Reverse f a)

mapM :: Monad m => (a -> m b) -> Reverse f a -> m (Reverse f b)

sequence :: Monad m => Reverse f (m a) -> m (Reverse f a)

Contravariant f => Contravariant (Reverse f)

Derived instance.

Defined in Data.Functor.Reverse

Methods

contramap :: (a -> b) -> Reverse f b -> Reverse f a

(>$) :: b -> Reverse f b -> Reverse f a

Eq1 f => Eq1 (Reverse f)

Defined in Data.Functor.Reverse

Methods

liftEq :: (a -> b -> Bool) -> Reverse f a -> Reverse f b -> Bool

Ord1 f => Ord1 (Reverse f)

Defined in Data.Functor.Reverse

Methods

liftCompare :: (a -> b -> Ordering) -> Reverse f a -> Reverse f b -> Ordering

Read1 f => Read1 (Reverse f)

Defined in Data.Functor.Reverse

Methods

liftReadsPrec :: (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (Reverse f a)

liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [Reverse f a]

liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (Reverse f a)

liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [Reverse f a]

Show1 f => Show1 (Reverse f)

Defined in Data.Functor.Reverse

Methods

liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> Reverse f a -> ShowS

liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [Reverse f a] -> ShowS

Alternative f => Alternative (Reverse f)

Derived instance.

Defined in Data.Functor.Reverse

Methods

empty :: Reverse f a

(<|>) :: Reverse f a -> Reverse f a -> Reverse f a

some :: Reverse f a -> Reverse f [a]

many :: Reverse f a -> Reverse f [a]

MonadPlus m => MonadPlus (Reverse m)

Derived instance.

Defined in Data.Functor.Reverse

Methods

mzero :: Reverse m a

mplus :: Reverse m a -> Reverse m a -> Reverse m a

(Eq1 f, Eq a) => Eq (Reverse f a)

Defined in Data.Functor.Reverse

Methods

(==) :: Reverse f a -> Reverse f a -> Bool

(/=) :: Reverse f a -> Reverse f a -> Bool

(Ord1 f, Ord a) => Ord (Reverse f a)

Defined in Data.Functor.Reverse

Methods

compare :: Reverse f a -> Reverse f a -> Ordering

(<) :: Reverse f a -> Reverse f a -> Bool

(<=) :: Reverse f a -> Reverse f a -> Bool

(>) :: Reverse f a -> Reverse f a -> Bool

(>=) :: Reverse f a -> Reverse f a -> Bool

max :: Reverse f a -> Reverse f a -> Reverse f a

min :: Reverse f a -> Reverse f a -> Reverse f a

(Read1 f, Read a) => Read (Reverse f a)

Defined in Data.Functor.Reverse

Methods

readsPrec :: Int -> ReadS (Reverse f a)

readList :: ReadS [Reverse f a]

readPrec :: ReadPrec (Reverse f a)

readListPrec :: ReadPrec [Reverse f a]

(Show1 f, Show a) => Show (Reverse f a)

Defined in Data.Functor.Reverse

Methods

showsPrec :: Int -> Reverse f a -> ShowS

show :: Reverse f a -> String

showList :: [Reverse f a] -> ShowS