GHC.Internal.Functor.ZipList

ghc-internal-9.1001.0: Basic libraries

Safe Haskell | None
Language | Haskell2010

GHC.Internal.Functor.ZipList

Synopsis

- newtype ZipList a = ZipList {
  - getZipList :: [a]
  }

# Documentation

newtype ZipList a Source #

Lists, but with an `Applicative` functor based on zipping.

#### Examples

Expand

In contrast to the `Applicative` for `List`:

    >>> (+) <$> [1, 2, 3] <*> [4, 5, 6]
    [5,6,7,6,7,8,7,8,9]

The Applicative instance of ZipList applies the operation by pairing up the elements, analogous to `zipWith`N

    >>> (+) <$> ZipList [1, 2, 3] <*> ZipList [4, 5, 6]
    ZipList {getZipList = [5,7,9]}

    >>> (,,,) <$> ZipList [1, 2] <*> ZipList [3, 4] <*> ZipList [5, 6] <*> ZipList [7, 8]
    ZipList {getZipList = [(1,3,5,7),(2,4,6,8)]}

    >>> ZipList [(+1), (^2), (/ 2)] <*> ZipList [5, 5, 5]
    ZipList {getZipList = [6.0,25.0,2.5]}

Constructors

ZipList |
Fields getZipList :: [a]

#### Instances

Instances details

Alternative ZipList Source # | @since base-4.11.0.0
Instance details Defined in GHC.Internal.Functor.ZipList Methods empty :: ZipList a Source # (<|>) :: ZipList a -> ZipList a -> ZipList a Source # some :: ZipList a -> ZipList [a] Source # many :: ZipList a -> ZipList [a] Source #
Applicative ZipList Source # |
    f <$> ZipList xs1 <*> ... <*> ZipList xsN
        = ZipList (zipWithN f xs1 ... xsN)
where `zipWithN` refers to the `zipWith` function of the appropriate arity (`zipWith`, `zipWith3`, `zipWith4`, ...). For example:
    (\a b c -> stimes c [a, b]) <$> ZipList "abcd" <*> ZipList "567" <*> ZipList [1..]
        = ZipList (zipWith3 (\a b c -> stimes c [a, b]) "abcd" "567" [1..])
        = ZipList {getZipList = ["a5","b6b6","c7c7c7"]}
@since base-2.01
Instance details Defined in GHC.Internal.Functor.ZipList Methods pure :: a -> ZipList a Source # (<*>) :: ZipList (a -> b) -> ZipList a -> ZipList b Source # liftA2 :: (a -> b -> c) -> ZipList a -> ZipList b -> ZipList c Source # (*>) :: ZipList a -> ZipList b -> ZipList b Source # (<*) :: ZipList a -> ZipList b -> ZipList a Source #
Functor ZipList Source # | @since base-2.01
Instance details Defined in GHC.Internal.Functor.ZipList Methods fmap :: (a -> b) -> ZipList a -> ZipList b Source # (<$) :: a -> ZipList b -> ZipList a Source #
Foldable ZipList Source # | @since base-4.9.0.0
Instance details Defined in GHC.Internal.Functor.ZipList Methods fold :: Monoid m => ZipList m -> m Source # foldMap :: Monoid m => (a -> m) -> ZipList a -> m Source # foldMap' :: Monoid m => (a -> m) -> ZipList a -> m Source # foldr :: (a -> b -> b) -> b -> ZipList a -> b Source # foldr' :: (a -> b -> b) -> b -> ZipList a -> b Source # foldl :: (b -> a -> b) -> b -> ZipList a -> b Source # foldl' :: (b -> a -> b) -> b -> ZipList a -> b Source # foldr1 :: (a -> a -> a) -> ZipList a -> a Source # foldl1 :: (a -> a -> a) -> ZipList a -> a Source # toList :: ZipList a -> [a] Source # null :: ZipList a -> Bool Source # length :: ZipList a -> Int Source # elem :: Eq a => a -> ZipList a -> Bool Source # maximum :: Ord a => ZipList a -> a Source # minimum :: Ord a => ZipList a -> a Source # sum :: Num a => ZipList a -> a Source # product :: Num a => ZipList a -> a Source #
Traversable ZipList Source # | @since base-4.9.0.0
Instance details Defined in GHC.Internal.Functor.ZipList Methods traverse :: Applicative f => (a -> f b) -> ZipList a -> f (ZipList b) Source # sequenceA :: Applicative f => ZipList (f a) -> f (ZipList a) Source # mapM :: Monad m => (a -> m b) -> ZipList a -> m (ZipList b) Source # sequence :: Monad m => ZipList (m a) -> m (ZipList a) Source #
Generic1 ZipList Source # |
Instance details Defined in GHC.Internal.Functor.ZipList Associated Types
type Rep1 ZipList | @since base-4.7.0.0
Instance details Defined in GHC.Internal.Functor.ZipList type Rep1 ZipList = D1 ('MetaData "ZipList" "GHC.Internal.Functor.ZipList" "ghc-internal" 'True) (C1 ('MetaCons "ZipList" 'PrefixI 'True) (S1 ('MetaSel ('Just "getZipList") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec1 [])))
Methods from1 :: ZipList a -> Rep1 ZipList a Source # to1 :: Rep1 ZipList a -> ZipList a Source #
Data a => Data (ZipList a) Source # | @since base-4.14.0.0
Instance details Defined in GHC.Internal.Functor.ZipList Methods gfoldl :: (forall d b. Data d => c (d -> b) -> d -> c b) -> (forall g. g -> c g) -> ZipList a -> c (ZipList a) Source # gunfold :: (forall b r. Data b => c (b -> r) -> c r) -> (forall r. r -> c r) -> Constr -> c (ZipList a) Source # toConstr :: ZipList a -> Constr Source # dataTypeOf :: ZipList a -> DataType Source # dataCast1 :: Typeable t => (forall d. Data d => c (t d)) -> Maybe (c (ZipList a)) Source # dataCast2 :: Typeable t => (forall d e. (Data d, Data e) => c (t d e)) -> Maybe (c (ZipList a)) Source # gmapT :: (forall b. Data b => b -> b) -> ZipList a -> ZipList a Source # gmapQl :: (r -> r' -> r) -> r -> (forall d. Data d => d -> r') -> ZipList a -> r Source # gmapQr :: forall r r'. (r' -> r -> r) -> r -> (forall d. Data d => d -> r') -> ZipList a -> r Source # gmapQ :: (forall d. Data d => d -> u) -> ZipList a -> [u] Source # gmapQi :: Int -> (forall d. Data d => d -> u) -> ZipList a -> u Source # gmapM :: Monad m => (forall d. Data d => d -> m d) -> ZipList a -> m (ZipList a) Source # gmapMp :: MonadPlus m => (forall d. Data d => d -> m d) -> ZipList a -> m (ZipList a) Source # gmapMo :: MonadPlus m => (forall d. Data d => d -> m d) -> ZipList a -> m (ZipList a) Source #
Generic (ZipList a) Source # |
Instance details Defined in GHC.Internal.Functor.ZipList Associated Types
type Rep (ZipList a) | @since base-4.7.0.0
Instance details Defined in GHC.Internal.Functor.ZipList type Rep (ZipList a) = D1 ('MetaData "ZipList" "GHC.Internal.Functor.ZipList" "ghc-internal" 'True) (C1 ('MetaCons "ZipList" 'PrefixI 'True) (S1 ('MetaSel ('Just "getZipList") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [a])))
Methods from :: ZipList a -> Rep (ZipList a) x Source # to :: Rep (ZipList a) x -> ZipList a Source #
IsList (ZipList a) Source # | @since base-4.15.0.0
Instance details Defined in GHC.Internal.IsList Associated Types
type Item (ZipList a) |
Instance details Defined in GHC.Internal.IsList type Item (ZipList a) = a
Methods fromList :: [Item (ZipList a)] -> ZipList a Source # fromListN :: Int -> [Item (ZipList a)] -> ZipList a Source # toList :: ZipList a -> [Item (ZipList a)] Source #
Read a => Read (ZipList a) Source # | @since base-4.7.0.0
Instance details Defined in GHC.Internal.Functor.ZipList Methods readsPrec :: Int -> ReadS (ZipList a) Source # readList :: ReadS [ZipList a] Source # readPrec :: ReadPrec (ZipList a) Source # readListPrec :: ReadPrec [ZipList a] Source #
Show a => Show (ZipList a) Source # | @since base-4.7.0.0
Instance details Defined in GHC.Internal.Functor.ZipList Methods showsPrec :: Int -> ZipList a -> ShowS Source # show :: ZipList a -> String Source # showList :: [ZipList a] -> ShowS Source #
Eq a => Eq (ZipList a) Source # | @since base-4.7.0.0
Instance details Defined in GHC.Internal.Functor.ZipList Methods (==) :: ZipList a -> ZipList a -> Bool Source # (/=) :: ZipList a -> ZipList a -> Bool Source #
Ord a => Ord (ZipList a) Source # | @since base-4.7.0.0
Instance details Defined in GHC.Internal.Functor.ZipList Methods compare :: ZipList a -> ZipList a -> Ordering Source # (<) :: ZipList a -> ZipList a -> Bool Source # (<=) :: ZipList a -> ZipList a -> Bool Source # (>) :: ZipList a -> ZipList a -> Bool Source # (>=) :: ZipList a -> ZipList a -> Bool Source # max :: ZipList a -> ZipList a -> ZipList a Source # min :: ZipList a -> ZipList a -> ZipList a Source #
type Rep1 ZipList Source # | @since base-4.7.0.0
Instance details Defined in GHC.Internal.Functor.ZipList type Rep1 ZipList = D1 ('MetaData "ZipList" "GHC.Internal.Functor.ZipList" "ghc-internal" 'True) (C1 ('MetaCons "ZipList" 'PrefixI 'True) (S1 ('MetaSel ('Just "getZipList") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec1 [])))
type Rep (ZipList a) Source # | @since base-4.7.0.0
Instance details Defined in GHC.Internal.Functor.ZipList type Rep (ZipList a) = D1 ('MetaData "ZipList" "GHC.Internal.Functor.ZipList" "ghc-internal" 'True) (C1 ('MetaCons "ZipList" 'PrefixI 'True) (S1 ('MetaSel ('Just "getZipList") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [a])))
type Item (ZipList a) Source # |
Instance details Defined in GHC.Internal.IsList type Item (ZipList a) = a