transformers-0.5.6.2: Concrete functor and monad transformers
Copyright (c) Ross Paterson 2010
License BSD-style (see the file LICENSE)
Maintainer R.Paterson@city.ac.uk
Stability experimental
Portability portable
Safe Haskell Safe
Language Haskell98

Data.Functor.Constant

Description

The constant functor.

Synopsis

Documentation

newtype Constant a b Source #

Constant functor.

Constructors

Constant

Fields

Instances

Instances details
Bitraversable ( Constant :: Type -> Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

bitraverse :: Applicative f => (a -> f c) -> (b -> f d) -> Constant a b -> f ( Constant c d) Source #

Bifoldable ( Constant :: Type -> Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

bifold :: Monoid m => Constant m m -> m Source #

bifoldMap :: Monoid m => (a -> m) -> (b -> m) -> Constant a b -> m Source #

bifoldr :: (a -> c -> c) -> (b -> c -> c) -> c -> Constant a b -> c Source #

bifoldl :: (c -> a -> c) -> (c -> b -> c) -> c -> Constant a b -> c Source #

Bifunctor ( Constant :: Type -> Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

bimap :: (a -> b) -> (c -> d) -> Constant a c -> Constant b d Source #

first :: (a -> b) -> Constant a c -> Constant b c Source #

second :: (b -> c) -> Constant a b -> Constant a c Source #

Eq2 ( Constant :: Type -> Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

liftEq2 :: (a -> b -> Bool ) -> (c -> d -> Bool ) -> Constant a c -> Constant b d -> Bool Source #

Ord2 ( Constant :: Type -> Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

liftCompare2 :: (a -> b -> Ordering ) -> (c -> d -> Ordering ) -> Constant a c -> Constant b d -> Ordering Source #

Read2 ( Constant :: Type -> Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

liftReadsPrec2 :: ( Int -> ReadS a) -> ReadS [a] -> ( Int -> ReadS b) -> ReadS [b] -> Int -> ReadS ( Constant a b) Source #

liftReadList2 :: ( Int -> ReadS a) -> ReadS [a] -> ( Int -> ReadS b) -> ReadS [b] -> ReadS [ Constant a b] Source #

liftReadPrec2 :: ReadPrec a -> ReadPrec [a] -> ReadPrec b -> ReadPrec [b] -> ReadPrec ( Constant a b) Source #

liftReadListPrec2 :: ReadPrec a -> ReadPrec [a] -> ReadPrec b -> ReadPrec [b] -> ReadPrec [ Constant a b] Source #

Show2 ( Constant :: Type -> Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

liftShowsPrec2 :: ( Int -> a -> ShowS ) -> ([a] -> ShowS ) -> ( Int -> b -> ShowS ) -> ([b] -> ShowS ) -> Int -> Constant a b -> ShowS Source #

liftShowList2 :: ( Int -> a -> ShowS ) -> ([a] -> ShowS ) -> ( Int -> b -> ShowS ) -> ([b] -> ShowS ) -> [ Constant a b] -> ShowS Source #

Functor ( Constant a :: Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

fmap :: (a0 -> b) -> Constant a a0 -> Constant a b Source #

(<$) :: a0 -> Constant a b -> Constant a a0 Source #

Monoid a => Applicative ( Constant a :: Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

pure :: a0 -> Constant a a0 Source #

(<*>) :: Constant a (a0 -> b) -> Constant a a0 -> Constant a b Source #

liftA2 :: (a0 -> b -> c) -> Constant a a0 -> Constant a b -> Constant a c Source #

(*>) :: Constant a a0 -> Constant a b -> Constant a b Source #

(<*) :: Constant a a0 -> Constant a b -> Constant a a0 Source #

Foldable ( Constant a :: Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

fold :: Monoid m => Constant a m -> m Source #

foldMap :: Monoid m => (a0 -> m) -> Constant a a0 -> m Source #

foldMap' :: Monoid m => (a0 -> m) -> Constant a a0 -> m Source #

foldr :: (a0 -> b -> b) -> b -> Constant a a0 -> b Source #

foldr' :: (a0 -> b -> b) -> b -> Constant a a0 -> b Source #

foldl :: (b -> a0 -> b) -> b -> Constant a a0 -> b Source #

foldl' :: (b -> a0 -> b) -> b -> Constant a a0 -> b Source #

foldr1 :: (a0 -> a0 -> a0) -> Constant a a0 -> a0 Source #

foldl1 :: (a0 -> a0 -> a0) -> Constant a a0 -> a0 Source #

toList :: Constant a a0 -> [a0] Source #

null :: Constant a a0 -> Bool Source #

length :: Constant a a0 -> Int Source #

elem :: Eq a0 => a0 -> Constant a a0 -> Bool Source #

maximum :: Ord a0 => Constant a a0 -> a0 Source #

minimum :: Ord a0 => Constant a a0 -> a0 Source #

sum :: Num a0 => Constant a a0 -> a0 Source #

product :: Num a0 => Constant a a0 -> a0 Source #

Traversable ( Constant a :: Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

traverse :: Applicative f => (a0 -> f b) -> Constant a a0 -> f ( Constant a b) Source #

sequenceA :: Applicative f => Constant a (f a0) -> f ( Constant a a0) Source #

mapM :: Monad m => (a0 -> m b) -> Constant a a0 -> m ( Constant a b) Source #

sequence :: Monad m => Constant a (m a0) -> m ( Constant a a0) Source #

Contravariant ( Constant a :: Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

contramap :: (a0 -> b) -> Constant a b -> Constant a a0 Source #

(>$) :: b -> Constant a b -> Constant a a0 Source #

Eq a => Eq1 ( Constant a :: Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

liftEq :: (a0 -> b -> Bool ) -> Constant a a0 -> Constant a b -> Bool Source #

Ord a => Ord1 ( Constant a :: Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

liftCompare :: (a0 -> b -> Ordering ) -> Constant a a0 -> Constant a b -> Ordering Source #

Read a => Read1 ( Constant a :: Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

liftReadsPrec :: ( Int -> ReadS a0) -> ReadS [a0] -> Int -> ReadS ( Constant a a0) Source #

liftReadList :: ( Int -> ReadS a0) -> ReadS [a0] -> ReadS [ Constant a a0] Source #

liftReadPrec :: ReadPrec a0 -> ReadPrec [a0] -> ReadPrec ( Constant a a0) Source #

liftReadListPrec :: ReadPrec a0 -> ReadPrec [a0] -> ReadPrec [ Constant a a0] Source #

Show a => Show1 ( Constant a :: Type -> Type ) Source #
Instance details

Defined in Data.Functor.Constant

Methods

liftShowsPrec :: ( Int -> a0 -> ShowS ) -> ([a0] -> ShowS ) -> Int -> Constant a a0 -> ShowS Source #

liftShowList :: ( Int -> a0 -> ShowS ) -> ([a0] -> ShowS ) -> [ Constant a a0] -> ShowS Source #

Eq a => Eq ( Constant a b) Source #
Instance details

Defined in Data.Functor.Constant

Methods

(==) :: Constant a b -> Constant a b -> Bool Source #

(/=) :: Constant a b -> Constant a b -> Bool Source #

Ord a => Ord ( Constant a b) Source #
Instance details

Defined in Data.Functor.Constant

Methods

compare :: Constant a b -> Constant a b -> Ordering Source #

(<) :: Constant a b -> Constant a b -> Bool Source #

(<=) :: Constant a b -> Constant a b -> Bool Source #

(>) :: Constant a b -> Constant a b -> Bool Source #

(>=) :: Constant a b -> Constant a b -> Bool Source #

max :: Constant a b -> Constant a b -> Constant a b Source #

min :: Constant a b -> Constant a b -> Constant a b Source #

Read a => Read ( Constant a b) Source #
Instance details

Defined in Data.Functor.Constant

Methods

readsPrec :: Int -> ReadS ( Constant a b) Source #

readList :: ReadS [ Constant a b] Source #

readPrec :: ReadPrec ( Constant a b) Source #

readListPrec :: ReadPrec [ Constant a b] Source #

Show a => Show ( Constant a b) Source #
Instance details

Defined in Data.Functor.Constant

Methods

showsPrec :: Int -> Constant a b -> ShowS Source #

show :: Constant a b -> String Source #

showList :: [ Constant a b] -> ShowS Source #

Semigroup a => Semigroup ( Constant a b) Source #
Instance details

Defined in Data.Functor.Constant

Methods

(<>) :: Constant a b -> Constant a b -> Constant a b Source #

sconcat :: NonEmpty ( Constant a b) -> Constant a b Source #

stimes :: Integral b0 => b0 -> Constant a b -> Constant a b Source #

Monoid a => Monoid ( Constant a b) Source #
Instance details

Defined in Data.Functor.Constant

Methods

mempty :: Constant a b Source #

mappend :: Constant a b -> Constant a b -> Constant a b Source #

mconcat :: [ Constant a b] -> Constant a b Source #