[Haskell-cafe] a problem defining a monad instance

Brent Yorgey byorgey at seas.upenn.edu
Fri Nov 6 17:09:41 EST 2009

On Fri, Nov 06, 2009 at 07:08:10PM +0100, Petr Pudlak wrote:
>    Hi all, 
> (This is a literate Haskell post.)
> I've encountered a small problem when trying to define a specialized
> monad instance. Maybe someone will able to help me or to tell me that
> it's impossible :-).

See the rmonad package on Hackage, which solves exactly this problem:



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