n-ary-functor: An n-ary version of Functor

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A single typeclass for Functor, Bifunctor, Trifunctor, etc.

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Versions,, 1.0
Change log CHANGELOG.md
Dependencies base (>=4.9 && <4.11) [details]
License LicenseRef-PublicDomain
Author Samuel Gélineau
Maintainer gelisam+github@gmail.com
Category Data
Home page https://github.com/gelisam/n-ary-functor
Uploaded by gelisam at 2018-01-06T22:26:34Z




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N-ary Functors

Functor and Bifunctor are both in base, but what about Trifunctor? Quadrifunctor? There must be a better solution than creating an infinite tower of typeclasses. Here's the API I managed to implement:

> nmap <#> (+1) <#> (+2) $ (0, 0)

> nmap <#> (+1) <#> (+2) <#> (+3) $ (0, 0, 0)

> nmap <#> (+1) <#> (+2) <#> (+3) <#> (+4) $ (0, 0, 0, 0)

For more details, see the documentation and the blog post.