Hi Brad, > > Experience has taught me to _never_ put class contexts on data > > definitions. Now you can't write something as simple as "Empty" - you > > have to give it a class context. This is just plain annoying. > > With the class context in the BST definition, ghc gives no complaints when > I evaluate "Empty":
In some circumstances, you need to give a type sig. For example using Hugs: Main> Empty ERROR - Cannot find "show" function for: *** Expression : Empty *** Of type : BST a I guess GHC has enough defaulting to display this anyway. You'll also have the dreaded-evil-horrid monomorhpism restriction if you type. empty = Empty Thanks Neil _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
