Try to make sure things are lined up properly, like the Empty and Left, and why are some gtreeMember indented? On 2009-11-04, at 7:04 AM, Ryan Temple wrote:
I'm making a general purpose N-ary tree and im coming up with "unexpected '=' on line 17" as an error. I have spent a fair while trying to work out why this isn't accepting the case that an Empty gtree returns false for any member search. i realise this is probably a very trivial error but any help would be appreciated:
module GTrees where
data Gtree = Empty | Leaf String | Node String [Gtree] deriving (Show)
--Tests if a given string is a member of the tree
gtreeMember :: (Ord a) => a -> Gtree a -> Bool gtreeMember y Empty = False -- line 17 gtreeMember y (Leaf x) = (x==y) gtreeMember y (Node x tree) |x==y = True |otherwise gtreeMember tree
This is the code up to the point of the error with the error line highlighted _______________________________________________ Beginners mailing list Beginners@haskell.org http://www.haskell.org/mailman/listinfo/beginners