name: ghc-typelits-natnormalise
version: 0.5
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.
homepage: http://www.clash-lang.org/
bug-reports: http://github.com/clash-lang/ghc-typelits-natnormalise/issues
license: BSD2
license-file: LICENSE
author: Christiaan Baaij
maintainer: christiaan.baaij@gmail.com
copyright: Copyright © 2015-2016 University of Twente
category: Type System
build-type: Simple
extra-source-files: README.md
CHANGELOG.md
cabal-version: >=1.10
source-repository head
type: git
location: https://github.com/clash-lang/ghc-typelits-natnormalise.git
flag deverror
description:
Enables `-Werror` for development mode and TravisCI
default: False
manual: True
library
exposed-modules: GHC.TypeLits.Normalise,
GHC.TypeLits.Normalise.SOP,
GHC.TypeLits.Normalise.Unify
build-depends: base >=4.9 && <5,
ghc >=8.0.1 && <8.2,
ghc-tcplugins-extra >=0.2,
integer-gmp >=1.0 && <1.1
hs-source-dirs: src
default-language: Haskell2010
other-extensions: CPP
LambdaCase
RecordWildCards
TupleSections
if flag(deverror)
ghc-options: -Wall -Werror
else
ghc-options: -Wall
test-suite test-ghc-typelits-natnormalise
type: exitcode-stdio-1.0
main-is: Tests.hs
Other-Modules: ErrorTests
build-depends: base >=4.8 && <5,
ghc-typelits-natnormalise >= 0.4,
tasty >= 0.10,
tasty-hunit >= 0.9
hs-source-dirs: tests
default-language: Haskell2010
other-extensions: DataKinds
GADTs
KindSignatures
NoImplicitPrelude
TypeFamilies
TypeOperators
ScopedTypeVariables
if flag(deverror)
ghc-options: -O0 -dcore-lint