[Haskell-cafe] The State Monad

J. Garrett Morris J.Garrett.Morris at Dartmouth.EDU
Thu Oct 7 19:03:48 EDT 2004

--- John Goerzen wrote:
tick :: Int -> State Int Int
tick newval = do put newval
                 return newval

Or this:

tick :: State Int Int
tick = do n <- get
          return n

That is even more incomprehensible to me -- why would removing a line
before the return cause a type error?
--- end of quote ---

I can run both of those without a problem - could you post more of your code?  It's probably somewhere else.  /gXm

More information about the Haskell-Cafe mailing list