Using GHC.TypeLits and singletons
eir at cis.upenn.edu
Mon Oct 29 16:50:08 CET 2012
You do recall correctly; they are supposed to work together. We discovered that they didn't a few weeks ago. Iavor has updated his implementation of TypeLits in HEAD. I still have to update singletons, which I will now do. Expect this update later today. In the meantime, make sure you have a version of libraries/base pulled in the last 13 days, as you will need the updated TypeLits.
On Oct 29, 2012, at 5:46 AM, José Pedro Magalhães <jpm at cs.uu.nl> wrote:
> Hi Iavor and Richard (CC ghc-users),
> If I recall correctly, Richard designed his singletons package in such a way that it would interact nicely
> with Iavor's type-level literals. Now I find myself in a situation where I need to use both type-level literals
> and singletons (basically because I'm reflecting at the value level both naturals, strings, and more
> complicated datatypes). But I see that the declarations of entities such as Sing, SingI, etc., are
> duplicated in the singletons package (seeing that they are already in GHC 7.6 within GHC.TypeLits).
> My question is: how can I use these two together?
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