[Haskell-cafe] Can't get my head round monad transformers

Peter Verswyvelen bugfact at gmail.com
Tue Sep 1 14:21:10 EDT 2009


Maybe the chapter on monad transformers in RWH can help?

http://book.realworldhaskell.org/read/monad-transformers.html



On Tue, Sep 1, 2009 at 7:34 PM, Colin
Adams<colinpauladams at googlemail.com> wrote:
> I'm trying to add a state monad onto the IO monad for use in a
> happstack application. I thought this should involve using StateT and
> Happstack.Server.SimpleHTTP.simpleHTTP', but I can't figure out how to
> plumb it all together. Any tips will be welcome.
>
> --
> Colin Adams
> Preston,
> Lancashire,
> ENGLAND
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