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	Haskell2010

Data.Functor.Reverse

Description

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

Synopsis

newtype Reverse f a = Reverse {
- getReverse :: f a
}

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

Instances details

Generic1 (Reverse f :: k -> Type) Source #
Instance details Defined in Data.Functor.Reverse Associated Types type Rep1 (Reverse f) :: k -> Type Source # Methods from1 :: forall (a :: k0). Reverse f a -> Rep1 (Reverse f) a Source # to1 :: forall (a :: k0). Rep1 (Reverse f) a -> Reverse f a Source #
MonadFail m => MonadFail (Reverse m) Source #
Instance details Defined in Data.Functor.Reverse Methods fail :: String -> Reverse m a Source #
Foldable f => Foldable (Reverse f) Source #	Fold from right to left.
Instance details Defined in Data.Functor.Reverse Methods fold :: Monoid m => Reverse f m -> m Source # foldMap :: Monoid m => (a -> m) -> Reverse f a -> m Source # foldMap' :: Monoid m => (a -> m) -> Reverse f a -> m Source # foldr :: (a -> b -> b) -> b -> Reverse f a -> b Source # foldr' :: (a -> b -> b) -> b -> Reverse f a -> b Source # foldl :: (b -> a -> b) -> b -> Reverse f a -> b Source # foldl' :: (b -> a -> b) -> b -> Reverse f a -> b Source # foldr1 :: (a -> a -> a) -> Reverse f a -> a Source # foldl1 :: (a -> a -> a) -> Reverse f a -> a Source # toList :: Reverse f a -> [a] Source # null :: Reverse f a -> Bool Source # length :: Reverse f a -> Int Source # elem :: Eq a => a -> Reverse f a -> Bool Source # maximum :: Ord a => Reverse f a -> a Source # minimum :: Ord a => Reverse f a -> a Source # sum :: Num a => Reverse f a -> a Source # product :: Num a => Reverse f a -> a Source #
Foldable1 f => Foldable1 (Reverse f) Source #	Fold from right to left.
Instance details Defined in Data.Functor.Reverse Methods fold1 :: Semigroup m => Reverse f m -> m Source # foldMap1 :: Semigroup m => (a -> m) -> Reverse f a -> m Source # foldMap1' :: Semigroup m => (a -> m) -> Reverse f a -> m Source # toNonEmpty :: Reverse f a -> NonEmpty a Source # maximum :: Ord a => Reverse f a -> a Source # minimum :: Ord a => Reverse f a -> a Source # head :: Reverse f a -> a Source # last :: Reverse f a -> a Source # foldrMap1 :: (a -> b) -> (a -> b -> b) -> Reverse f a -> b Source # foldlMap1' :: (a -> b) -> (b -> a -> b) -> Reverse f a -> b Source # foldlMap1 :: (a -> b) -> (b -> a -> b) -> Reverse f a -> b Source # foldrMap1' :: (a -> b) -> (a -> b -> b) -> Reverse f a -> b Source #
Eq1 f => Eq1 (Reverse f) Source #
Instance details Defined in Data.Functor.Reverse Methods liftEq :: (a -> b -> Bool) -> Reverse f a -> Reverse f b -> Bool Source #
Ord1 f => Ord1 (Reverse f) Source #
Instance details Defined in Data.Functor.Reverse Methods liftCompare :: (a -> b -> Ordering) -> Reverse f a -> Reverse f b -> Ordering Source #
Read1 f => Read1 (Reverse f) Source #
Instance details Defined in Data.Functor.Reverse Methods liftReadsPrec :: (Int -> ReadS a) -> ReadS [a] -> Int -> ReadS (Reverse f a) Source # liftReadList :: (Int -> ReadS a) -> ReadS [a] -> ReadS [Reverse f a] Source # liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (Reverse f a) Source # liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [Reverse f a] Source #
Show1 f => Show1 (Reverse f) Source #
Instance details Defined in Data.Functor.Reverse Methods liftShowsPrec :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> Int -> Reverse f a -> ShowS Source # liftShowList :: (Int -> a -> ShowS) -> ([a] -> ShowS) -> [Reverse f a] -> ShowS Source #
Contravariant f => Contravariant (Reverse f) Source #	Derived instance.
Instance details Defined in Data.Functor.Reverse Methods contramap :: (a' -> a) -> Reverse f a -> Reverse f a' Source # (>$) :: b -> Reverse f b -> Reverse f a Source #
Traversable f => Traversable (Reverse f) Source #	Traverse from right to left.
Instance details Defined in Data.Functor.Reverse Methods traverse :: Applicative f0 => (a -> f0 b) -> Reverse f a -> f0 (Reverse f b) Source # sequenceA :: Applicative f0 => Reverse f (f0 a) -> f0 (Reverse f a) Source # mapM :: Monad m => (a -> m b) -> Reverse f a -> m (Reverse f b) Source # sequence :: Monad m => Reverse f (m a) -> m (Reverse f a) Source #
Alternative f => Alternative (Reverse f) Source #	Derived instance.
Instance details Defined in Data.Functor.Reverse Methods empty :: Reverse f a Source # (<\|>) :: Reverse f a -> Reverse f a -> Reverse f a Source # some :: Reverse f a -> Reverse f [a] Source # many :: Reverse f a -> Reverse f [a] Source #
Applicative f => Applicative (Reverse f) Source #	Derived instance.
Instance details Defined in Data.Functor.Reverse Methods pure :: a -> Reverse f a Source # (<>) :: Reverse f (a -> b) -> Reverse f a -> Reverse f b Source # liftA2 :: (a -> b -> c) -> Reverse f a -> Reverse f b -> Reverse f c Source # (>) :: Reverse f a -> Reverse f b -> Reverse f b Source # (<*) :: Reverse f a -> Reverse f b -> Reverse f a Source #
Functor f => Functor (Reverse f) Source #	Derived instance.
Instance details Defined in Data.Functor.Reverse Methods fmap :: (a -> b) -> Reverse f a -> Reverse f b Source # (<$) :: a -> Reverse f b -> Reverse f a Source #
Monad m => Monad (Reverse m) Source #	Derived instance.
Instance details Defined in Data.Functor.Reverse Methods (>>=) :: Reverse m a -> (a -> Reverse m b) -> Reverse m b Source # (>>) :: Reverse m a -> Reverse m b -> Reverse m b Source # return :: a -> Reverse m a Source #
MonadPlus m => MonadPlus (Reverse m) Source #	Derived instance.
Instance details Defined in Data.Functor.Reverse Methods mzero :: Reverse m a Source # mplus :: Reverse m a -> Reverse m a -> Reverse m a Source #
Generic (Reverse f a) Source #
Instance details Defined in Data.Functor.Reverse Associated Types type Rep (Reverse f a) :: Type -> Type Source # Methods from :: Reverse f a -> Rep (Reverse f a) x Source # to :: Rep (Reverse f a) x -> Reverse f a Source #
(Read1 f, Read a) => Read (Reverse f a) Source #
Instance details Defined in Data.Functor.Reverse Methods readsPrec :: Int -> ReadS (Reverse f a) Source # readList :: ReadS [Reverse f a] Source # readPrec :: ReadPrec (Reverse f a) Source # readListPrec :: ReadPrec [Reverse f a] Source #
(Show1 f, Show a) => Show (Reverse f a) Source #
Instance details Defined in Data.Functor.Reverse Methods showsPrec :: Int -> Reverse f a -> ShowS Source # show :: Reverse f a -> String Source # showList :: [Reverse f a] -> ShowS Source #
(Eq1 f, Eq a) => Eq (Reverse f a) Source #
Instance details 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) Source #
Instance details 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 #
type Rep1 (Reverse f :: k -> Type) Source #
Instance details Defined in Data.Functor.Reverse type Rep1 (Reverse f :: k -> Type) = D1 ('MetaData "Reverse" "Data.Functor.Reverse" "transformers-0.6.1.0" 'True) (C1 ('MetaCons "Reverse" 'PrefixI 'True) (S1 ('MetaSel ('Just "getReverse") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec1 f)))
type Rep (Reverse f a) Source #
Instance details Defined in Data.Functor.Reverse type Rep (Reverse f a) = D1 ('MetaData "Reverse" "Data.Functor.Reverse" "transformers-0.6.1.0" 'True) (C1 ('MetaCons "Reverse" 'PrefixI 'True) (S1 ('MetaSel ('Just "getReverse") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (f a))))