Re: O'Haskell OOP Polymorphic Functions

31 Jan 2001


      On 30-Jan-2001, Marcin 'Qrczak' Kowalczyk  wrote:
...
Tue, 30 Jan 2001 00:13:41 -0800, Ashley Yakeley  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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