The th-alpha package

[Tags:bsd3, library, test]

Compare TH expressions (or clauses, patterns, etc.) for alpha equivalence. That is, compare for equality modulo the renaming of bound variables.

 areExpAEq [| \x -> x |] [| \y -> y |]
 -- True
    let x = mkName "x"
    let y = mkName "y"
    runQ $ (LamE [VarP x] (VarE x)) @= (LamE [VarP y] (VarE y))
 -- True

This can be useful when for instance testing libraries that use Template Haskell - usually correctness is only defined up to alpha equivalence.


Dependencies base (==4.*), containers, mmorph (>1 && <2), mtl (==2.*), template-haskell, th-desugar (>=1.4 && <1.7), transformers [details]
License BSD3
Copyright Julian K. Arni
Author Julian K. Arni
Maintainer Julian K. Arni <>
Category Language
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Source repository head: git clone
Uploaded Fri Jul 1 13:57:23 UTC 2016 by jkarni
Distributions NixOS:
Downloads 1061 total (12 in the last 30 days)
0 []
Status Docs available [build log]
Last success reported on 2016-11-22 [all 1 reports]
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