Re: [Haskell-cafe] derivable type classes

Thanks for the pointers again - you are of great help every time! On 23 March 2010 17:44, Josef Svenningsson wrote:

On Tue, Mar 23, 2010 at 11:52 AM, Ozgur Akgun wrote:

...

Can a user define a derivable type class of her own? If yes, how?

GHC has a feature which lets you define classes such that making an instance of them is as easy as deriving. It's called Generic classes. See GHC's documentation for the details:

http://www.haskell.org/ghc/docs/latest/html/users_guide/generic-classes.html

Hth,

Josef

-- Ozgur Akgun