Here's some of the threatened examples:
> data OrdFuncExist = OE (Ord a => Char -> a)
> data OrdListExist = OLE (Ord a => [a])
> emap :: OrdFuncExist -> [Char] -> OrdListExist
> emap (OE f) l = OLE (map f l)
Grand... (Apparently.) But now I try to define an actual OrdFuncExist:
> blah = OE fromEnum
Inferred type is less polymorphic than expected
Quantified type variable `a' is unified with `Int'
In an expression with expected type:
forall a1. (Ord a1) => Char -> a1
In the first argument of `OE', namely `fromEnum'
In the right-hand side of a pattern binding: OE fromEnum
Whaaaaat? I dinnae unnerstan', captain.
The other problem:
> emax :: OrdListExist -> OrdListExist
> emax (OLE l) = OLE [maximum l]
Now, I think I see why this doesn't work: but any ideas on how to fix?
Cheers,
Alex.
