Re: O'Haskell OOP Polymorphic Functions

[Ashley Yakeley]

At 2001-01-30 02:37, Fergus Henderson wrote:

>class BaseClass s where
>       downcast_to_derived :: s -> Maybe Derived

Exactly what I was trying to avoid, since now every base class needs to 
know about every derived class. This isn't really a practical way to 
build an extensible type hierarchy.

-- 
Ashley Yakeley, Seattle WA


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