Re: [Haskell-cafe] MonadPeelIO instance for monad transformers on top of "forall"

On 5 February 2011 04:19, Anders Kaseorg wrote:

Just to demonstrate that I didn’t use the triviality of ReaderT (), here’s a less trivial example with ReaderT and StateT:

This is superb, thank you! I would never have come up with that :-) It still seems to fail somehow on my real example, but I'm confident I can get it working now. Many thanks! Max