--- /dev/null
+class Functor f where\r
+ map :: (a -> b) -> f a -> f b\r
+ \r
+data Foo a = Foo a\r
+\r
+class Functor Foo where\r
+ map f (Foo x) = Foo (f x)\r
+--\r
+6:1-7:30: Class Functor has already been defined in this module.
\ No newline at end of file