The latest version of ghc-typelits-natnormalise is 0.7.10-0.

ghc-typelits-natnormalise

Version 0.5.10 revision 1 uploaded by ChristiaanBaaij.

Package meta

Synopsis
GHC typechecker plugin for types of kind GHC.TypeLits.Nat
Description

A type checker plugin for GHC that can solve equalities of types of kind Nat, where these types are either:

  • Type-level naturals

  • Type variables

  • Applications of the arithmetic expressions (+,-,*,^).

It solves these equalities by normalising them to sort-of SOP (Sum-of-Products) form, and then perform a simple syntactic equality.

For example, this solver can prove the equality between:

(x + 2)^(y + 2)

and

4*x*(2 + x)^y + 4*(2 + x)^y + (2 + x)^y*x^2

Because the latter is actually the SOP normal form of the former.

To use the plugin, add the

OPTIONS_GHC -fplugin GHC.TypeLits.Normalise

Pragma to the header of your file.

Author
Christiaan Baaij
Bug reports
http://github.com/clash-lang/ghc-typelits-natnormalise/issues
Category
Type System
Copyright
Copyright © 2015-2016, University of Twente, 2017-2018, QBayLogic B.V.
Homepage
http://www.clash-lang.org/
Maintainer
christiaan.baaij@gmail.com
Package URL
n/a
Stability
n/a

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