Re: [Haskell-cafe] HList and Type signatures / synonyms

Gunther, I've got a little experience with HList - read below. 2009/9/6 Günther Schmidt :

Hi,

I keep accumulating values and right now use plain tuples for that. I end up with a 12 element tuple and things are a bit messy.

I'd like to use extensible Records from HList instead, thing is I'd like to keep putting type signatures in my code. As it turns out that seems to be where it gets messy with HList.

There is a template haskell function called "makeLabel" that can generate the boilerplate for you. If you are comfortable not seeing all the type definitions, it might do the trick.

PS: Does anyone know why there are Label-n modules in HList, and which one to use?

I don't but Label4 works for me. Justin