[Haskell-beginners] Heterogeneous Lists

[Magnus Therning]

On Tue, May 28, 2013 at 9:36 AM, harry <voldermort at hotmail.com> wrote:
> Every OO language which supports generics allows a declaration such as
> List<Show> alist, where Show is an interface. Any type implementing Show can
> be put in alist, and any Show operation can be performed on the alist's
> members. No casts, wrappers, or other special types and plumbing are needed.
>
> Why isn't it possible to do this directly in Haskell?

Just to make sure... I guess you've already read
http://www.haskell.org/haskellwiki/Heterogenous_collections right?

/M

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Magnus Therning                      OpenPGP: 0xAB4DFBA4
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