Re: Extensible data types?

[Jose Romildo Malaquias]

On Mon, Sep 25, 2000 at 02:42:20PM +0200, John H�rnkvist wrote:
> If you use Hugs -- and possibly GHC -- you might be able to use the  
> "Either" constructor for subtyping. I first saw this pattern in  
> "Modular Monadic Interpreters" (or something like that) by Jones,  
> Liang and Hudak.
> [...]

Thanks for the sugestions. For now I will try the solution posted by
Peter Achten, but yours will be in my bag for futre consideration,
when I should decide the design.

Regards,

Romildo
-- 
Prof. Jos� Romildo Malaquias <[EMAIL PROTECTED]>
Departamento de Computa��o
Universidade Federal de Ouro Preto
Brasil