Re: [Haskell-beginners] special polymorphic default of typeclass depending on other typeclasses?

It appear more like Show, you can add a constraint to the generic instance instance Show a => Foo a where bar x = show x Em 29 de jun de 2017 2:16 PM, "Silent Leaf" escreveu: hi, say i have the following typeclass: class Foo a where bar :: a -> String looks a lot like the Read typeclass, right? (at least i think it should?) well say it's a different meaning (in other terms i can't or do not want to use Read, but i'd like to implement a default version of bar for those instances that also implement Read. is there a way to do so? _______________________________________________ Beginners mailing list Beginners@haskell.org http://mail.haskell.org/cgi-bin/mailman/listinfo/beginners