18.03.2011, 14:22, "Roel van Dijk" <[email protected]>;:
> Remember that constructors are functions, except that you can't > pattern match against them. .. > The downside is that you can't pattern-match against these functions. The thing is that I need pattern matching, just functions won't do. Anyway, a new question arose. If I have already declared a type, can I add new constructors to it from other modules? Maybe there are some GHC extensions to solve both these problems. _______________________________________________ Haskell-Cafe mailing list [email protected] http://www.haskell.org/mailman/listinfo/haskell-cafe
