/Haskell 7


Copyright (c) Ashley Yakeley 2007
License BSD-style (see the LICENSE file in the distribution)
Maintainer [email protected]
Stability experimental
Portability portable
Safe Haskell Trustworthy
Language Haskell2010


class Category cat where Source

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


id :: cat a a Source

the identity morphism

(.) :: cat b c -> cat a b -> cat a c infixr 9 Source

morphism composition


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 Source

Right-to-left composition

(>>>) :: Category cat => cat a b -> cat b c -> cat a c infixr 1 Source

Left-to-right composition

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Licensed under a BSD-style license (see top of the page).