Data.Bifunctor.Assoc

Documentation

class Bifunctor p => Assoc p where

"Semigroup-y" Bifunctors.

assoc . unassoc = id
unassoc . assoc = id
assoc . bimap (bimap f g) h = bimap f (bimap g h) . assoc

This library doesn't provide Monoidal class, with left and right unitors. Are they useful in practice?

Methods

assoc :: p (p a b) c -> p a (p b c)

unassoc :: p a (p b c) -> p (p a b) c

Instances

Assoc Either

Defined in Data.Bifunctor.Assoc

Methods

assoc :: Either (Either a b) c -> Either a (Either b c)

unassoc :: Either a (Either b c) -> Either (Either a b) c

Assoc (,)

Defined in Data.Bifunctor.Assoc

Methods

assoc :: ((a, b), c) -> (a, (b, c))

unassoc :: (a, (b, c)) -> ((a, b), c)

Assoc p => Assoc (Flip p)

Defined in Data.Bifunctor.Assoc

Methods

assoc :: Flip p (Flip p a b) c -> Flip p a (Flip p b c)

unassoc :: Flip p a (Flip p b c) -> Flip p (Flip p a b) c