The constraints package

[Tags:bsd3, library]

Constraint manipulation

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Versions 0.1, 0.2, 0.3,, 0.3.1, 0.3.2, 0.3.3, 0.3.4,,, 0.3.5, 0.4, 0.4.1,,,, 0.6, 0.8
Dependencies base (>=4.4 && <5), ghc-prim, newtype (==0.2.*) [details]
License BSD3
Copyright Copyright (C) 2011 Edward A. Kmett
Author Edward A. Kmett
Maintainer Edward A. Kmett <>
Stability experimental
Category Constraints
Home page
Bug tracker
Source repository head: git clone git://
Uploaded Fri Oct 11 17:51:42 UTC 2013 by EdwardKmett
Distributions Arch:0.8, Debian:0.6, FreeBSD:, LTSHaskell:0.8, NixOS:0.8, Stackage:0.8, Tumbleweed:0.8
Downloads 18668 total (41 in the last 30 days)
1 []
Status Docs not available [build log]
All reported builds failed as of 2015-12-12 [all 5 reports]


  • Data
    • Data.Constraint
      • Data.Constraint.Forall
      • Data.Constraint.Unsafe


Maintainer's Corner

For package maintainers and hackage trustees

Readme for constraints

Readme for constraints-0.3.4


This package provides data types and classes for manipulating the 'ConstraintKinds' exposed by GHC in 7.4.

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