The category-extras package

[Tags:bsd3, library]

A vastly expanded collection of modules implementing various ideas from category theory. Notable bits include: comonads, adjunctions, and various recursion schemes ala Functional Programming with Bananas, Lenses, Envelopes and Barbed Wire.


Versions 0.1, 0.2, 0.44.1, 0.44.2, 0.44.4, 0.50.1, 0.50.3, 0.51.0, 0.51.2, 0.51.3, 0.52.0, 0.52.1, 0.52.3, 0.53.0, 0.53.1, 0.53.3, 0.53.4, 0.53.5,, 1.0, 1.0.1, 1.0.2
Dependencies array, base, ghc, mtl (>=1.1) [details]
License BSD3
Copyright Copyright (C) 2008 Edward A. Kmett, Copyright (C) 2004--2008 Dave Menendez, Copyright (C) 2007 Iavor Diatchki
Author Edward A. Kmett, Dave Menendez
Maintainer Edward A. Kmett <>
Stability experimental
Category Control, Monads, Comonads
Home page
Uploaded Tue Jun 17 02:54:16 UTC 2008 by EdwardKmett
Distributions NixOS:1.0.2
Downloads 5437 total (42 in the last 30 days)
0 []
Status Docs uploaded by user
Build status unknown [no reports yet]




arrowsubclassescategoryIndicates Control.Category is available and that the standard library has its arrows subclass Control.Category.CategoryEnabledAutomatic
typefamiliesSupport for Type Families is available to usEnabledAutomatic
optimizeEnable optimizationsDisabledAutomatic

Use -f <flag> to enable a flag, or -f -<flag> to disable that flag. More info


Maintainer's Corner

For package maintainers and hackage trustees