th-alpha: Alpha equivalence for TH Exp

[ bsd3, language, library ] [ Propose Tags ]

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.

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Versions [RSS] 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 && <5), containers, mmorph (>1 && <2), mtl (>=2 && <3), template-haskell, th-desugar (>=1.4 && <1.7), transformers [details]
License BSD-3-Clause
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 repo head: git clone https://github.com/jkarni/th-alpha
Uploaded by jkarni at 2016-07-01T13:57:23Z
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Reverse Dependencies 1 direct, 0 indirect [details]
Downloads 4612 total (20 in the last 30 days)
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Status Docs available [build log]
Last success reported on 2016-11-22 [all 1 reports]