transformers-0.5.2.0: Concrete functor and monad transformers

Copyright(c) Russell O'Connor 2009
LicenseBSD-style (see the file LICENSE)
Maintainer[email protected]
Stabilityexperimental
Portabilityportable
Safe HaskellSafe
LanguageHaskell98

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

Instances

Functor f => Functor (Reverse * f) #

Derived instance.

Methods

fmap :: (a -> b) -> Reverse * f a -> Reverse * f b Source #

(<$) :: a -> Reverse * f b -> Reverse * f a Source #

Applicative f => Applicative (Reverse * f) #

Derived instance.

Methods

pure :: a -> Reverse * f a Source #

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

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

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

Foldable f => Foldable (Reverse * f) #

Fold from right to left.

Methods

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

Traversable f => Traversable (Reverse * f) #

Traverse from right to left.

Methods

traverse :: Applicative f => (a -> f b) -> Reverse * f a -> f (Reverse * f b) Source #

sequenceA :: Applicative f => Reverse * f (f a) -> f (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 #

Eq1 f => Eq1 (Reverse * f) # 

Methods

liftEq :: (a -> b -> Bool) -> Reverse * f a -> Reverse * f b -> Bool Source #

Ord1 f => Ord1 (Reverse * f) # 

Methods

liftCompare :: (a -> b -> Ordering) -> Reverse * f a -> Reverse * f b -> Ordering Source #

Read1 f => Read1 (Reverse * f) # 

Methods

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

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

Show1 f => Show1 (Reverse * f) # 

Methods

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

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

Alternative f => Alternative (Reverse * f) #

Derived instance.

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 #

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

Methods

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

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

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

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

Methods

showsPrec :: Int -> Reverse * f a -> ShowS Source #

show :: Reverse * f a -> String Source #

showList :: [Reverse * f a] -> ShowS Source #