Re: [Haskell-cafe] Polymorphic (typeclass) values in a list?

On 10/22/07, Tim Docker wrote:

[...] You may then like to add a type class to turn things into renderables:

class IsRenderable where toRenderable :: a -> Renderable

instance IsRendeable Point where ... instance IsRenderable Line where ... [...]

Cool. I should get more familiar with basic Haskell98 before I decide on using GHC extensions... Thanks, TJ