[Haskell-cafe] Basic type classing question.

J. Garrett Morris trevion at gmail.com
Wed Sep 21 01:52:33 EDT 2005

On 9/20/05, Karl Grapone <kgrapone at gmail.com> wrote:
> What I want to be able to do is add and remove fields while the system
> is running, I suppose via hs-plugins, and I should be prevented from,
> for example, accidentally taking an employees first name and using it
> as a departments address.

I know the HList paper - http://homepages.cwi.nl/~ralf/HList/ -
demonstrates type-safe extensible records.  However, the type classery
behind it may not be totally obvious at first depending on how new to
Haskell you are.


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