[Haskell-cafe] Object-oriented programming, Haskell and existentials

[Lennart Augustsson]

What do you mean by need?  From a theoretical or practical perspective?
We don't need them from a theoretical perspective, but in practice I'd
rather use existentials than encodinging them in some tricky way.

On Wed, Oct 15, 2008 at 11:05 AM,  <oleg at okmij.org> wrote:
> The web page
> begs a question if there is ever any real need for existentials.
>