Data.Functor.Constant

transformers-0.6.1.1: 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 | Haskell2010

Data.Functor.Constant

Description

The constant functor.

Synopsis

- newtype Constant a (b :: k) = Constant {
  - getConstant :: a
  }

# Documentation

newtype Constant a (b :: k) Source #

Constant functor.

Constructors

Constant |
Fields getConstant :: a

#### Instances

Instances details

Generic1 (Constant a :: k -> Type) Source # |
Instance details Defined in Data.Functor.Constant Associated Types
type Rep1 (Constant a :: k -> Type) |
Instance details Defined in Data.Functor.Constant type Rep1 (Constant a :: k -> Type) = D1 ('MetaData "Constant" "Data.Functor.Constant" "transformers-0.6.1.1-2ce2" 'True) (C1 ('MetaCons "Constant" 'PrefixI 'True) (S1 ('MetaSel ('Just "getConstant") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))
Methods from1 :: forall (a0 :: k). Constant a a0 -> Rep1 (Constant a :: k -> Type) a0 # to1 :: forall (a0 :: k). Rep1 (Constant a :: k -> Type) a0 -> Constant a a0 #
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 #
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 #
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 #
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 #
Contravariant (Constant a :: Type -> Type) Source # |
Instance details Defined in Data.Functor.Constant Methods contramap :: (a' -> a0) -> Constant a a0 -> Constant a a' Source # (>$) :: b -> Constant a b -> Constant a a0 Source #
Monoid a => Applicative (Constant a :: Type -> Type) Source # |
Instance details Defined in Data.Functor.Constant Methods pure :: a0 -> Constant a a0 # (<*>) :: Constant a (a0 -> b) -> Constant a a0 -> Constant a b # liftA2 :: (a0 -> b -> c) -> Constant a a0 -> Constant a b -> Constant a c # (*>) :: Constant a a0 -> Constant a b -> Constant a b # (<*) :: Constant a a0 -> Constant a b -> Constant a a0 #
Functor (Constant a :: Type -> Type) Source # |
Instance details Defined in Data.Functor.Constant Methods fmap :: (a0 -> b) -> Constant a a0 -> Constant a b # (<$) :: a0 -> Constant a b -> Constant a a0 #
Foldable (Constant a :: Type -> Type) Source # |
Instance details Defined in Data.Functor.Constant Methods fold :: Monoid m => Constant a m -> m # foldMap :: Monoid m => (a0 -> m) -> Constant a a0 -> m # foldMap' :: Monoid m => (a0 -> m) -> Constant a a0 -> m # foldr :: (a0 -> b -> b) -> b -> Constant a a0 -> b # foldr' :: (a0 -> b -> b) -> b -> Constant a a0 -> b # foldl :: (b -> a0 -> b) -> b -> Constant a a0 -> b # foldl' :: (b -> a0 -> b) -> b -> Constant a a0 -> b # foldr1 :: (a0 -> a0 -> a0) -> Constant a a0 -> a0 # foldl1 :: (a0 -> a0 -> a0) -> Constant a a0 -> a0 # toList :: Constant a a0 -> [a0] # null :: Constant a a0 -> Bool # length :: Constant a a0 -> Int # elem :: Eq a0 => a0 -> Constant a a0 -> Bool # maximum :: Ord a0 => Constant a a0 -> a0 # minimum :: Ord a0 => Constant a a0 -> a0 # sum :: Num a0 => Constant a a0 -> a0 # product :: Num a0 => Constant a a0 -> a0 #
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) # sequenceA :: Applicative f => Constant a (f a0) -> f (Constant a a0) # mapM :: Monad m => (a0 -> m b) -> Constant a a0 -> m (Constant a b) # sequence :: Monad m => Constant a (m a0) -> m (Constant a a0) #
Monoid a => Monoid (Constant a b) Source # |
Instance details Defined in Data.Functor.Constant Methods mempty :: Constant a b # mappend :: Constant a b -> Constant a b -> Constant a b # mconcat :: [Constant a b] -> Constant a b #
Semigroup a => Semigroup (Constant a b) Source # |
Instance details Defined in Data.Functor.Constant Methods (<>) :: Constant a b -> Constant a b -> Constant a b # sconcat :: NonEmpty (Constant a b) -> Constant a b # stimes :: Integral b0 => b0 -> Constant a b -> Constant a b #
(Typeable b, Typeable k, Data a) => Data (Constant a b) Source # |
Instance details Defined in Data.Functor.Constant Methods gfoldl :: (forall d b0. Data d => c (d -> b0) -> d -> c b0) -> (forall g. g -> c g) -> Constant a b -> c (Constant a b) # gunfold :: (forall b0 r. Data b0 => c (b0 -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (Constant a b) # toConstr :: Constant a b -> Constr # dataTypeOf :: Constant a b -> DataType # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (Constant a b)) # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (Constant a b)) # gmapT :: (forall b0. Data b0 => b0 -> b0) -> Constant a b -> Constant a b # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> Constant a b -> r # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> Constant a b -> r # gmapQ :: (forall d. Data d => d -> u) -> Constant a b -> [u] # gmapQi :: Int -> (forall d. Data d => d -> u) -> Constant a b -> u # gmapM :: Monad m => (forall d. Data d => d -> m d) -> Constant a b -> m (Constant a b) # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> Constant a b -> m (Constant a b) # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> Constant a b -> m (Constant a b) #
Generic (Constant a b) Source # |
Instance details Defined in Data.Functor.Constant Associated Types
type Rep (Constant a b) |
Instance details Defined in Data.Functor.Constant type Rep (Constant a b) = D1 ('MetaData "Constant" "Data.Functor.Constant" "transformers-0.6.1.1-2ce2" 'True) (C1 ('MetaCons "Constant" 'PrefixI 'True) (S1 ('MetaSel ('Just "getConstant") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))
Methods from :: Constant a b -> Rep (Constant a b) x # to :: Rep (Constant a b) x -> Constant a b #
Read a => Read (Constant a b) Source # |
Instance details Defined in Data.Functor.Constant Methods readsPrec :: Int -> ReadS (Constant a b) # readList :: ReadS [Constant a b] # readPrec :: ReadPrec (Constant a b) # readListPrec :: ReadPrec [Constant a b] #
Show a => Show (Constant a b) Source # |
Instance details Defined in Data.Functor.Constant Methods showsPrec :: Int -> Constant a b -> ShowS # show :: Constant a b -> String # showList :: [Constant a b] -> ShowS #
Eq a => Eq (Constant a b) Source # |
Instance details Defined in Data.Functor.Constant Methods (==) :: Constant a b -> Constant a b -> Bool # (/=) :: Constant a b -> Constant a b -> Bool #
Ord a => Ord (Constant a b) Source # |
Instance details Defined in Data.Functor.Constant Methods compare :: Constant a b -> Constant a b -> Ordering # (<) :: Constant a b -> Constant a b -> Bool # (<=) :: Constant a b -> Constant a b -> Bool # (>) :: Constant a b -> Constant a b -> Bool # (>=) :: Constant a b -> Constant a b -> Bool # max :: Constant a b -> Constant a b -> Constant a b # min :: Constant a b -> Constant a b -> Constant a b #
type Rep1 (Constant a :: k -> Type) Source # |
Instance details Defined in Data.Functor.Constant type Rep1 (Constant a :: k -> Type) = D1 ('MetaData "Constant" "Data.Functor.Constant" "transformers-0.6.1.1-2ce2" 'True) (C1 ('MetaCons "Constant" 'PrefixI 'True) (S1 ('MetaSel ('Just "getConstant") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))
type Rep (Constant a b) Source # |
Instance details Defined in Data.Functor.Constant type Rep (Constant a b) = D1 ('MetaData "Constant" "Data.Functor.Constant" "transformers-0.6.1.1-2ce2" 'True) (C1 ('MetaCons "Constant" 'PrefixI 'True) (S1 ('MetaSel ('Just "getConstant") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 a)))