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Generic for unlifted types #155

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kozross opened this issue Jul 10, 2022 · 1 comment
Open

Generic for unlifted types #155

kozross opened this issue Jul 10, 2022 · 1 comment

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@kozross
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kozross commented Jul 10, 2022

Currently, you cannot derive Generic for an unlifted type, specifically one defined using the new UnliftedDatatypes extension. Would it be possible to lift this restriction?
@kosmikus
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I don't know. In general, Generic is currently limited to types of kind Type / *. Generalising this a bit is in principle possible, and I've primarily never had the time to merge these generalisations.

However, for unlifted types, a different sort of generalisation is needed. I guess conceptually we would need unlifted versions of NS and NP to represent these. I'm currently not sure whether all this is worth it.

@MangoIV MangoIV mentioned this issue Mar 21, 2023
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@kosmikus @kozross