[Haskell-cafe] how do I avoid excessive constructor application?

[S. Alexander Jacobson]

I'd like to do this sort of thing with types other than Either.
Is there a generic safe coerce function?

-Alex-


On Wed, 2 Mar 2005, Stefan Holdermans wrote:

> Lemmih,
>
>> And you can "fix" it with some unsafeCoerce# magic. (:
>
> Actually, as I pointed out, the required coercion in perfectly safe, though 
> not implicit:
>
> coerceRight :: Either a b -> Either c b
> coerceRight (Right b) = Right b
>
> Regards,
>
> Stefan
>

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