[Haskell-cafe] MonadGL - Partitioning effects without giving up type inference

[Derek Elkins]

On Thu, 2007-09-13 at 19:34 +0100, Jules Bean wrote:

> 
> Any comments? I'm sure this has been shown before but I don't
> remember where.

The Monad Transformer Library essentially does this, the types you get
are along the lines of:

foo :: (Monad m, MonadState s m, MonadReader r m) => m Int