Data.Functor.WithIndex

Indexed Functors

class Functor f => FunctorWithIndex i f | f -> i where

A Functor with an additional index.

Instances must satisfy a modified form of the Functor laws:

imap f . imap g ≡ imap (\i -> f i . g i)
imap (\_ a -> a) ≡ id

Minimal complete definition

Nothing

Methods

imap :: (i -> a -> b) -> f a -> f b

Map with access to the index.

default imap :: TraversableWithIndex i f => (i -> a -> b) -> f a -> f b

Instances

FunctorWithIndex () Identity

Defined in WithIndex

Methods

imap :: (() -> a -> b) -> Identity a -> Identity b

FunctorWithIndex () Par1

Defined in WithIndex

Methods

imap :: (() -> a -> b) -> Par1 a -> Par1 b

FunctorWithIndex () Maybe

Defined in WithIndex

Methods

imap :: (() -> a -> b) -> Maybe a -> Maybe b

FunctorWithIndex Int ZipList

Same instance as for [].

Defined in WithIndex

Methods

imap :: (Int -> a -> b) -> ZipList a -> ZipList b

FunctorWithIndex Int IntMap

Defined in WithIndex

Methods

imap :: (Int -> a -> b) -> IntMap a -> IntMap b

FunctorWithIndex Int Seq

The position in the Seq is available as the index.

Defined in WithIndex

Methods

imap :: (Int -> a -> b) -> Seq a -> Seq b

FunctorWithIndex Int NonEmpty

Defined in WithIndex

Methods

imap :: (Int -> a -> b) -> NonEmpty a -> NonEmpty b

FunctorWithIndex Int []

The position in the list is available as the index.

Defined in WithIndex

Methods

imap :: (Int -> a -> b) -> [a] -> [b]

FunctorWithIndex Void (Proxy :: Type -> Type)

Defined in WithIndex

Methods

imap :: (Void -> a -> b) -> Proxy a -> Proxy b

FunctorWithIndex Void (U1 :: Type -> Type)

Defined in WithIndex

Methods

imap :: (Void -> a -> b) -> U1 a -> U1 b

FunctorWithIndex Void (V1 :: Type -> Type)

Defined in WithIndex

Methods

imap :: (Void -> a -> b) -> V1 a -> V1 b

Ix i => FunctorWithIndex i (Array i)

Defined in WithIndex

Methods

imap :: (i -> a -> b) -> Array i a -> Array i b

FunctorWithIndex k (Map k)

Defined in WithIndex

Methods

imap :: (k -> a -> b) -> Map k a -> Map k b

FunctorWithIndex k ((,) k)

Defined in WithIndex

Methods

imap :: (k -> a -> b) -> (k, a) -> (k, b)

FunctorWithIndex Void (Const e :: Type -> Type)

Defined in WithIndex

Methods

imap :: (Void -> a -> b) -> Const e a -> Const e b

FunctorWithIndex Void (Constant e :: Type -> Type)

Defined in WithIndex

Methods

imap :: (Void -> a -> b) -> Constant e a -> Constant e b

FunctorWithIndex i f => FunctorWithIndex i (Rec1 f)

Defined in WithIndex

Methods

imap :: (i -> a -> b) -> Rec1 f a -> Rec1 f b

FunctorWithIndex i f => FunctorWithIndex i (Backwards f)

Defined in WithIndex

Methods

imap :: (i -> a -> b) -> Backwards f a -> Backwards f b

FunctorWithIndex i m => FunctorWithIndex i (IdentityT m)

Defined in WithIndex

Methods

imap :: (i -> a -> b) -> IdentityT m a -> IdentityT m b

FunctorWithIndex i f => FunctorWithIndex i (Reverse f)

Defined in WithIndex

Methods

imap :: (i -> a -> b) -> Reverse f a -> Reverse f b

FunctorWithIndex Void (K1 i c :: Type -> Type)

Defined in WithIndex

Methods

imap :: (Void -> a -> b) -> K1 i c a -> K1 i c b

FunctorWithIndex r ((->) r)

Defined in WithIndex

Methods

imap :: (r -> a -> b) -> (r -> a) -> r -> b

FunctorWithIndex [Int] Tree

Defined in WithIndex

Methods

imap :: ([Int] -> a -> b) -> Tree a -> Tree b

FunctorWithIndex i m => FunctorWithIndex (e, i) (ReaderT e m)

Defined in WithIndex

Methods

imap :: ((e, i) -> a -> b) -> ReaderT e m a -> ReaderT e m b

(FunctorWithIndex i f, FunctorWithIndex j g) => FunctorWithIndex (Either i j) (Product f g)

Defined in WithIndex

Methods

imap :: (Either i j -> a -> b) -> Product f g a -> Product f g b

(FunctorWithIndex i f, FunctorWithIndex j g) => FunctorWithIndex (Either i j) (Sum f g)

Defined in WithIndex

Methods

imap :: (Either i j -> a -> b) -> Sum f g a -> Sum f g b

(FunctorWithIndex i f, FunctorWithIndex j g) => FunctorWithIndex (Either i j) (f :*: g)

Defined in WithIndex

Methods

imap :: (Either i j -> a -> b) -> (f :*: g) a -> (f :*: g) b

(FunctorWithIndex i f, FunctorWithIndex j g) => FunctorWithIndex (Either i j) (f :+: g)

Defined in WithIndex

Methods

imap :: (Either i j -> a -> b) -> (f :+: g) a -> (f :+: g) b

(FunctorWithIndex i f, FunctorWithIndex j g) => FunctorWithIndex (i, j) (Compose f g)

Defined in WithIndex

Methods

imap :: ((i, j) -> a -> b) -> Compose f g a -> Compose f g b

(FunctorWithIndex i f, FunctorWithIndex j g) => FunctorWithIndex (i, j) (f :.: g)

Defined in WithIndex

Methods

imap :: ((i, j) -> a -> b) -> (f :.: g) a -> (f :.: g) b