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Simon Peyton Jones authored
For deriving Functor, Foldable, Traversable with empty data cons I just generate a null equation f _ = error "urk" There are probably more lurking (eg Enum) but this will do for now.
6efa3901
For deriving Functor, Foldable, Traversable with empty data cons I just generate a null equation f _ = error "urk" There are probably more lurking (eg Enum) but this will do for now.