On 19/05/07, Andrew Coppin <[EMAIL PROTECTED]> wrote:
Um... why doesn't this work?my_fn x = do if x < 0 then do let y = 5 return () else do let y = 8 return () print y (Error: "y" is not in scope.)
let-blocks only scope over the do-block they're contained in. Here y is out of scope once you leave the inner do-block. The solution is to do something like the following: do let y = if x < 0 then 5 else 8 print y -- -David House, [EMAIL PROTECTED] _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
