[Haskell-cafe] State monad is missing Applicative instance

[Henning Thielemann]

Peter Verswyvelen schrieb:
> ouch, I was confusing the mtl and transformers package...
> 
> so basically transformers is a better replacement for mtl? 
> 
> or does mtl offer things transformers does not?

transformers and monad-fd are cleanly separated, transformers is Haskell
98 and monad-fd uses functional dependencies.