[Haskell-cafe] Does this typeclass have a name?
tom-lists-haskell-cafe-2013 at jaguarpaw.co.uk
Mon Apr 21 08:00:20 UTC 2014
On Mon, Apr 21, 2014 at 07:09:13AM +0200, Bardur Arantsson wrote:
> class Foo a e where
> foo :: e -> a -> a
> bar :: a
> You have a sequence of "events" e_i and a starting value
> "bar" and can use the "foo" function to apply all events
> to that starting value
Do you *really* want a typeclass for this, rather than a value?
More information about the Haskell-Cafe