Safe Haskell	Safe
Language	Haskell2010

Data.Bifunctor.Assoc

Synopsis

class Bifunctor p => Assoc (p :: Type -> Type -> Type) where
- assoc :: p (p a b) c -> p a (p b c)
- unassoc :: p a (p b c) -> p (p a b) c

Documentation

class Bifunctor p => Assoc (p :: Type -> Type -> Type) where Source #

"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) Source #

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

Instances details

Assoc Either Source #
Instance details Defined in Data.Bifunctor.Assoc Methods assoc :: Either (Either a b) c -> Either a (Either b c) Source # unassoc :: Either a (Either b c) -> Either (Either a b) c Source #
Assoc (,) Source #
Instance details Defined in Data.Bifunctor.Assoc Methods assoc :: ((a, b), c) -> (a, (b, c)) Source # unassoc :: (a, (b, c)) -> ((a, b), c) Source #
Assoc (Const :: Type -> Type -> Type) Source #
Instance details Defined in Data.Bifunctor.Assoc Methods assoc :: Const (Const a b) c -> Const a (Const b c) Source # unassoc :: Const a (Const b c) -> Const (Const a b) c Source #