Re: [Haskell] Forcing Type Class Equality

2006-06-29 Thread Gerrit van den Geest
Hi John, NB the essence what I am trying to do is to define a proxy class Foo for class Ba1 I would have thought that something as simple as the following would have worked ?? class Ba1 a where dosomething :: a -> IO () ba1 :: Ba1 a => a -> IO () ba1 x = dosomething x instance Ba1 Int w

RE: [Haskell] Forcing Type Class Equality

2006-06-28 Thread john lask
NB the essence what I am trying to do is to define a proxy class Foo for class Ba1 I would have thought that something as simple as the following would have worked ?? class Ba1 a where dosomething :: a -> IO () ba1 :: Ba1 a => a -> IO () ba1 x = dosomething x instance Ba1 Int where doso

[Haskell] Forcing Type Class Equality

2006-06-28 Thread john lask
** this is literate haskell hoping someone can help me. What I am trying to do is class Ba1 a ba1 :: Ba1 a => a -> IO () ba1 x = print "helllo" what I wish to do is declare another function class Foo a proxy :: Foo a => a -> IO () so that I can do something like proxy x = ba1 x