> So why not use one?
>
>
>
> Simon
>
>
If I do
instance (Data p) => Data (Experiment p)
then GHC does not know that the type instances for
type instance XEOverLit (GhcPass 'Parsed ) = PlaceHolder
type instance XEOverLit (GhcPass 'Renamed ) = PlaceHolder
type instance XEOverLit (GhcPass 'Typechecked) = PlaceHolder
apply.
Or do I misunderstand your advice?
Alan
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