W3cubDocs

/Haskell 8

Control.Applicative.Backwards

Copyright (c) Russell O'Connor 2009
License BSD-style (see the file LICENSE)
Maintainer [email protected]
Stability experimental
Portability portable
Safe Haskell Safe
Language Haskell98

Description

Making functors with an Applicative instance that performs actions in the reverse order.

newtype Backwards f a Source

The same functor, but with an Applicative instance that performs actions in the reverse order.

Constructors

Backwards

Fields

Instances
Instances details
Functor f => Functor (Backwards f)

Derived instance.
Instance details

Defined in Control.Applicative.Backwards

Methods

fmap :: (a -> b) -> Backwards f a -> Backwards f b Source

(<$) :: a -> Backwards f b -> Backwards f a Source

Applicative f => Applicative (Backwards f)

Apply f-actions in the reverse order.
Instance details

Defined in Control.Applicative.Backwards

Methods

pure :: a -> Backwards f a Source

(<*>) :: Backwards f (a -> b) -> Backwards f a -> Backwards f b Source

liftA2 :: (a -> b -> c) -> Backwards f a -> Backwards f b -> Backwards f c Source

(*>) :: Backwards f a -> Backwards f b -> Backwards f b Source

(<*) :: Backwards f a -> Backwards f b -> Backwards f a Source

Foldable f => Foldable (Backwards f)

Derived instance.
Instance details

Defined in Control.Applicative.Backwards

Methods

fold :: Monoid m => Backwards f m -> m Source

foldMap :: Monoid m => (a -> m) -> Backwards f a -> m Source

foldMap' :: Monoid m => (a -> m) -> Backwards f a -> m Source

foldr :: (a -> b -> b) -> b -> Backwards f a -> b Source

foldr' :: (a -> b -> b) -> b -> Backwards f a -> b Source

foldl :: (b -> a -> b) -> b -> Backwards f a -> b Source

foldl' :: (b -> a -> b) -> b -> Backwards f a -> b Source

foldr1 :: (a -> a -> a) -> Backwards f a -> a Source

foldl1 :: (a -> a -> a) -> Backwards f a -> a Source

toList :: Backwards f a -> [a] Source

null :: Backwards f a -> Bool Source

length :: Backwards f a -> Int Source

elem :: Eq a => a -> Backwards f a -> Bool Source

maximum :: Ord a => Backwards f a -> a Source

minimum :: Ord a => Backwards f a -> a Source

sum :: Num a => Backwards f a -> a Source

product :: Num a => Backwards f a -> a Source

Traversable f => Traversable (Backwards f)

Derived instance.
Instance details

Defined in Control.Applicative.Backwards

Methods

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

sequenceA :: Applicative f0 => Backwards f (f0 a) -> f0 (Backwards f a) Source

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

sequence :: Monad m => Backwards f (m a) -> m (Backwards f a) Source

Contravariant f => Contravariant (Backwards f)

Derived instance.
Instance details

Defined in Control.Applicative.Backwards

Methods

contramap :: (a -> b) -> Backwards f b -> Backwards f a Source

(>$) :: b -> Backwards f b -> Backwards f a Source

Eq1 f => Eq1 (Backwards f)
Instance details

Defined in Control.Applicative.Backwards

Methods

liftEq :: (a -> b -> Bool) -> Backwards f a -> Backwards f b -> Bool Source

Ord1 f => Ord1 (Backwards f)
Instance details

Defined in Control.Applicative.Backwards

Methods

liftCompare :: (a -> b -> Ordering) -> Backwards f a -> Backwards f b -> Ordering Source

Read1 f => Read1 (Backwards f)
Instance details

Defined in Control.Applicative.Backwards

Methods

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

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

liftReadPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec (Backwards f a) Source

liftReadListPrec :: ReadPrec a -> ReadPrec [a] -> ReadPrec [Backwards f a] Source

Show1 f => Show1 (Backwards f)
Instance details

Defined in Control.Applicative.Backwards

Methods

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

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

Alternative f => Alternative (Backwards f)

Try alternatives in the same order as f.
Instance details

Defined in Control.Applicative.Backwards

Methods

empty :: Backwards f a Source

(<|>) :: Backwards f a -> Backwards f a -> Backwards f a Source

some :: Backwards f a -> Backwards f [a] Source

many :: Backwards f a -> Backwards f [a] Source

(Eq1 f, Eq a) => Eq (Backwards f a)
Instance details

Defined in Control.Applicative.Backwards

Methods

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

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

(Ord1 f, Ord a) => Ord (Backwards f a)
Instance details

Defined in Control.Applicative.Backwards

Methods

compare :: Backwards f a -> Backwards f a -> Ordering

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

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

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

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

max :: Backwards f a -> Backwards f a -> Backwards f a

min :: Backwards f a -> Backwards f a -> Backwards f a

(Read1 f, Read a) => Read (Backwards f a)
Instance details

Defined in Control.Applicative.Backwards

Methods

readsPrec :: Int -> ReadS (Backwards f a) Source

readList :: ReadS [Backwards f a] Source

readPrec :: ReadPrec (Backwards f a) Source

readListPrec :: ReadPrec [Backwards f a] Source

(Show1 f, Show a) => Show (Backwards f a)
Instance details

Defined in Control.Applicative.Backwards

Methods

showsPrec :: Int -> Backwards f a -> ShowS Source

show :: Backwards f a -> String Source

showList :: [Backwards f a] -> ShowS Source

© The University of Glasgow and others
Licensed under a BSD-style license (see top of the page).
https://downloads.haskell.org/~ghc/8.8.3/docs/html/libraries/transformers-0.5.6.2/Control-Applicative-Backwards.html