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Data.Functor.Reverse

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

Description

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

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
Instances details
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
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
(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

© The University of Glasgow and others
Licensed under a BSD-style license (see top of the page).
https://downloads.haskell.org/~ghc/9.4.2/docs/libraries/transformers-0.5.6.2/Data-Functor-Reverse.html