cmptype: Compare types of any kinds
Please see the README on GitHub at https://github.com/isovector/type-sets/tree/master/cmptype#readme
[Skip to Readme]
Downloads
- cmptype-0.1.0.0.tar.gz [browse] (Cabal source package)
- Package description (as included in the package)
Maintainer's Corner
For package maintainers and hackage trustees
Candidates
- No Candidates
| Versions [RSS] | 0.1.0.0, 0.1.0.1, 0.2.0.0 |
|---|---|
| Change log | ChangeLog.md |
| Dependencies | base (>=4.7 && <5), ghc (>=8.6.3 && <8.8), magic-tyfams (>=0.1.0.0 && <0.2) [details] |
| License | BSD-3-Clause |
| Copyright | 2019 Sandy Maguire |
| Author | Sandy Maguire |
| Maintainer | sandy@sandymaguire.me |
| Category | Type |
| Home page | https://github.com/https://github.com/isovector/type-sets/tree/master/cmptype#readme |
| Bug tracker | https://github.com/https://github.com/isovector/type-sets/tree/master/cmptype/issues |
| Source repo | head: git clone https://github.com/https://github.com/isovector/type-sets/tree/master/cmptype |
| Uploaded | by isovector at 2019-08-06T18:18:37Z |
| Distributions | |
| Reverse Dependencies | 1 direct, 0 indirect [details] |
| Downloads | 1270 total (10 in the last 30 days) |
| Rating | (no votes yet) [estimated by Bayesian average] |
| Your Rating | |
| Status | Docs uploaded by user Build status unknown [no reports yet] |
Readme for cmptype-0.1.0.0
[back to package description]cmptype
Dedication
Comparison is an act of violence against the self.
--Iyanla Vanzant
Overview
cmptype provides a magical type family that lets you compare types:
type family CmpType (a :: k) (b :: k) :: Ordering
When you turn on the -fplugin=Type.Compare.Plugin flag, it will let you
compare arbitrary types. Why would you want such a thing? Probably because you
want to write a type-level container that isn't a fucking list!
Acknowledgments
Big thanks to Boris Rozinov for the initial idea, and for making as much coffee as I could drink while I wrote it. Also thanks to Christiaan Baaij and Matt Pickering for their indispensable help convincing GHC to do the right thing here.