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
 do
    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.

Properties

Versions 0.1.0.0, 0.1.0.1, 0.1.0.2, 0.2.0.0, 0.2.0.1, 0.2.0.2, 0.2.1.0
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 <jkarni@gmail.com>
Category Language
Home page https://github.com/jkarni/th-alpha
Bug tracker https://github.com/jkarni/th-alpha/issues
Source repository head: git clone https://github.com/jkarni/th-alpha
Uploaded Fri Jul 1 13:57:23 UTC 2016 by jkarni
Distributions NixOS:0.2.1.0
Downloads 1061 total (12 in the last 30 days)
Votes
0 []
Status Docs available [build log]
Last success reported on 2016-11-22 [all 1 reports]
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