category-extras-0.53.6: Various modules and constructs inspired by category theory Contents Index

Control.Comonad.HigherOrder Portability non-portable (rank-2 polymorphism) Stability experimental Maintainer Edward Kmett <ekmett@gmail.com>

Description

extending Neil Ghani and Patrician Johann's HFunctor to higher order comonads

Documentation

class HFunctor f where

Methods ffmap :: Functor g => (a -> b) -> f g a -> f g b hfmap :: (g :~> h) -> f g :~> f h Instances HFunctor CoYoneda HFunctor Yoneda Bifunctor p Hask Hask Hask => HFunctor (Ap p) Functor f => HFunctor (CompF f) Functor f => HFunctor (ACompF f) Functor g => HFunctor (Lan g) HFunctor (Ran g) (HFunctor f, HFunctor g) => HFunctor (CompH f g)

class HFunctor w => HCopointed w where

Methods hextract :: Functor f => w f a -> f a Instances HCopointed CoYoneda HCopointed Yoneda

class HCopointed w => HComonad w where

Methods hextend :: (Functor f, Functor g) => (w f :~> g) -> w f :~> w g Instances HComonad CoYoneda HComonad Yoneda

hduplicate :: (HComonad w, Functor (w g), Functor g) => w g :~> w (w g)

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