[Haskell-cafe] data and classes question

2008-01-29 Thread Chaim Friedman
Hello, I had a question about type classes and data types. I want to create one class that has a function which depends upon a parameter from another class. I would assume that this can be done, but I can't seem to write code that does it. Can anybody tell me what is wrong? Here is an example

Re: [Haskell-cafe] data and classes question

2008-01-29 Thread Bulat Ziganshin
Hello Chaim, Tuesday, January 29, 2008, 7:26:25 PM, you wrote: your approach is completely wrong (OOP-inspired, but haskell isn't OOP language). type class is common interface to different types. just for example: data BinState = On | Off data BinChange = OnToOff | OffToOn class MinValue a