libghc-ghc-typelits-natnormalise-dev - 0.7.7-1 main

A type checker plugin for GHC that can solve equalities and inequalities
of types of kind @Nat@, where these types are either:
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* Type-level naturals
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* Type variables
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* Applications of the arithmetic expressions (+,-,*,^).
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It solves these equalities by normalising them to sort-of SOP
(Sum-of-Products) form, and then perform a simple syntactic equality.
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For example, this solver can prove the equality between:
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(x + 2)^(y + 2)
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and
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4*x*(2 + x)^y + 4*(2 + x)^y + (2 + x)^y*x^2
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Because the latter is actually the SOP normal form of the former.
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To use the plugin, add the
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OPTIONS_GHC -fplugin GHC.TypeLits.Normalise
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Pragma to the header of your file.
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This package provides a library for the Haskell programming language.
See http://www.haskell.org/ for more information on Haskell.