O'Haskell OOP Polymorphic Functions
Wed, 31 Jan 2001 14:44:07 +1100
On 30-Jan-2001, Marcin 'Qrczak' Kowalczyk <email@example.com> wrote:
> Tue, 30 Jan 2001 00:13:41 -0800, Ashley Yakeley <firstname.lastname@example.org> pisze:
> > How do I define downcast?
> You can use a non-standard module Dynamic present in ghc, hbc and Hugs
> (I don't know if it's compatible with O'Haskell).
That lets you downcast to specific ground types, but it doesn't
let you downcast to a type class constrained type variable.
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