algebraic-classes: Conversions between algebraic classes and F-algebras.

[ bsd3, data, generics, library, math ] [ Propose Tags ]
Versions 0, 0.1, 0.2, 0.2.1, 0.3, 0.3.1, 0.3.2, 0.4, 0.5, 0.5.1, 0.5.2, 0.6, 0.7, 0.7.1, 0.8, 0.9, 0.9.1
Change log CHANGELOG
Dependencies base (>=4.10 && <4.12), syb (==0.7.*), template‑haskell (>=2.12 && <2.14) [details]
License BSD-3-Clause
Author Sjoerd Visscher
Category Data, Generics, Math
Home page
Bug tracker
Source repo head: git clone git://
Uploaded by SjoerdVisscher at Sun Mar 11 21:11:41 UTC 2018
Distributions NixOS:0.9.1
Downloads 5239 total (97 in the last 30 days)
Rating (no votes yet) [estimated by rule of succession]
Your Rating
  • λ
  • λ
  • λ
Status Docs available [build log]
Last success reported on 2018-03-11 [all 1 reports]
Hackage Matrix CI

Algebraic classes are type classes where all the methods return a value of the same type, which is also the class parameter. Examples from base are Num and Monoid.

F-algebras are functions f a -> a, where the functor f is called the signature, and the type a the carrier.

This package relates these 2 concepts, and can create conversions between the two using Template Haskell. More specifically, it can generate:

This is useful because type classes are more commonly used in Haskell than F-algebras, but F-algebras are easier to work with, because they are just functions.




Maintainer's Corner

For package maintainers and hackage trustees