Type classes confusion

Hi, I'm trying to use type classes and suspect I've got confused somewhere down the line, because I've got to an error message that I don't understand and can't remove. I have a class that works like a hash table, mapping from String to some type. I have two instances, one that is case

Re: Type classes confusion

Ah. I just need to drop the context from the data type declaration. Sorry, Andrew andrew cooke said: Hi, I'm trying to use type classes and suspect I've got confused somewhere down the line, because I've got to an error message that I don't understand and can't remove. I have a class