Re: [Haskell-beginners] Is there a simpler way? Building a monad on `IO' Monad

Hi Daniel,

If it is not mutated at all (which seems not entirely unlikely with a pair (stdin,stdout) of Handles), you should use

ReaderT (Handle,Handle) IO

instead of

StateT (Handle,Handle) IO

Thank you so much! Your careful exposition of the avenues available to me in the previous email was amazing, and is most, most appreciated! I had a feeling what I was doing was probably a common occurrence, but haven't seen enough real-world Haskell code to know what to call it yet!

Cheers, Daniel

Thanks again; Arlen