The eq package

[Tags: bsd3, library]

Leibnizian equality

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Versions0.1.0, 0.1.1, 0.1.2, 0.1.3, 0.2.0, 0.3.0, 0.3.1, 0.3.2, 0.3.3,, 0.3.4,,,, 0.3.5, 0.3.6, 0.3.7,, 3.0, 3.1, 3.1.1, 4.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4
Change logCHANGELOG.markdown
Dependenciesbase (==4.*), semigroupoids (==4.*) [details]
CopyrightCopyright (C) 2011-2013 Edward A. Kmett
AuthorEdward A. Kmett
MaintainerEdward A. Kmett <>
CategoryType System
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Source repositoryhead: git clone git://
UploadedSun Oct 13 22:20:56 UTC 2013 by EdwardKmett
DistributionsLTSHaskell:4.0.4, NixOS:4.0.4, Stackage:4.0.4
Downloads3878 total (193 in last 30 days)
0 []
StatusDocs available [build log]
Successful builds reported [all 1 reports]




Maintainers' corner

For package maintainers and hackage trustees

Readme for eq-4.0


Build Status

This package provides a data type that witnesses equality between two types using Leibnizian equality.

It includes a refinement to the notion of Leibnizian equality by Oleg Kiselyov that permits it to refine equality using the injectively of type constructors via type families.

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