Copyright	(c) Russell O'Connor 2009
License	BSD-style (see the file LICENSE)
Maintainer	R.Paterson@city.ac.uk
Stability	experimental
Portability	portable
Safe Haskell	Safe
Language	Haskell98

Data.Functor.Reverse

Description

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

Synopsis

Documentation

newtype Reverse f a Source #

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

Constructors

Reverse
Fields getReverse :: f a

Instances

Functor f => Functor (Reverse * f) Source #	Derived instance.
Methods fmap :: (a -> b) -> Reverse * f a -> Reverse * f b # (<$) :: a -> Reverse * f b -> Reverse * f a #
Applicative f => Applicative (Reverse * f) Source #	Derived instance.
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) Source #	Fold from right to left.
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) Source #	Traverse from right to left.
Methods traverse :: Applicative f => (a -> f b) -> Reverse * f a -> f (Reverse * f b) # sequenceA :: Applicative f => Reverse * f (f a) -> f (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) #
Eq1 f => Eq1 (Reverse * f) Source #
Methods liftEq :: (a -> b -> Bool) -> Reverse * f a -> Reverse * f b -> Bool #
Ord1 f => Ord1 (Reverse * f) Source #
Methods liftCompare :: (a -> b -> Ordering) -> Reverse * f a -> Reverse * f b -> Ordering #
Read1 f => Read1 (Reverse * f) Source #
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) Source #
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) Source #	Derived instance.
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] #
(Eq1 f, Eq a) => Eq (Reverse * f a) Source #
Methods (==) :: Reverse * f a -> Reverse * f a -> Bool # (/=) :: Reverse * f a -> Reverse * f a -> Bool #
(Ord1 f, Ord a) => Ord (Reverse * f a) Source #
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) Source #
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) Source #
Methods showsPrec :: Int -> Reverse * f a -> ShowS # show :: Reverse * f a -> String # showList :: [Reverse * f a] -> ShowS #