The representable-functors package

[ Tags: bsd3, data-structures, deprecated, functors, library, monads ] [ Propose Tags ]
Deprecated. in favor of adjunctions

Representable functors

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Versions 0.1.0,,, 0.2.0, 0.3.0,,,, 0.4.0, 0.4.1, 0.4.2, 0.4.3, 0.4.4, 0.5.0, 1.8.0, 2.0,,,,, 2.0.1, 2.0.2, 2.1, 2.1.2, 2.2, 2.2.1,, 2.4,,, 2.5, 3.0,,,, 3.0.1, 3.1,,
Change log CHANGELOG.markdown
Dependencies array (>= && <0.5), base (==4.*), comonad (==3.*), comonad-transformers (>=3), comonads-fd (>=3), containers (>=0.3 && <0.6), contravariant (>=, distributive (>=0.2.2), free (>=3), keys (>=3), mtl (>= && <2.2), semigroupoids (>=3), semigroups (>=, transformers (>=0.2 && <0.4) [details]
License BSD3
Copyright Copyright (C) 2011-2013 Edward A. Kmett
Author Edward A. Kmett
Maintainer Edward A. Kmett <>
Category Monads, Functors, Data Structures
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Source repo head: git clone git://
Uploaded Tue Mar 26 07:45:44 UTC 2013 by EdwardKmett
Updated Thu Jan 8 08:47:46 UTC 2015 by HerbertValerioRiedel to revision 1   [What is this?]
Distributions Debian:, NixOS:
Downloads 13969 total (203 in the last 30 days)
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Note: This package has metadata revisions in the cabal description newer than included in the tarball. To unpack the package including the revisions, use 'cabal get'.

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Readme for representable-functors-3.1

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This package provides representable functors for haskell. In category theory a representable functor (more pedantically a corepresentable functor) is one such that f a is isomorphic to x -> a. We choose the name Representable here because we are talking about haskell Functor instances, and they are all covariant, so this is the more natural notion of representability for Haskell.

Contact Information

Contributions and bug reports are welcome!

Please feel free to contact me through github or on the #haskell IRC channel on

-Edward Kmett