Choosing implementation depending on class instances using rewriting rules

Niklas Broberg niklas.broberg at
Wed Jun 3 07:17:14 EDT 2009

Hi Milan,

> Is there a way to write such a rewriting rule or there is no way of acquiring
> the Ord dictionary in rewrite rule? Or does anyone know any other way
> of implementing such a nub without explicitly listing all Ord instances?

Have a look at



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