Control.Category

Documentation

class Category cat where

A class for categories. id and (.) must form a monoid.

Methods

id ∷ cat a a

the identity morphism

(.) ∷ cat b c → cat a b → cat a c infixr 9

morphism composition

Instances

Category ★ (→)

Monad m ⇒ Category ★ (Kleisli m)

Category k (Coercion k)

Category k ((:~:) k)

(<<<) ∷ Category cat ⇒ cat b c → cat a b → cat a c infixr 1

Right-to-left composition

(>>>) ∷ Category cat ⇒ cat a b → cat b c → cat a c infixr 1

Left-to-right composition