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  • Adam Gundry's avatar
    b84b91f5
    Representation-polymorphic HasField (fixes #22156) · b84b91f5
    Adam Gundry authored and Marge Bot's avatar Marge Bot committed 
    This generalises the HasField class to support representation polymorphism,
so that instead of

    type HasField :: forall {k} . k -> Type -> Type -> Constraint

we have

    type HasField :: forall {k} {r_rep} {a_rep} . k -> TYPE r_rep -> TYPE a_rep -> Constraint
    b84b91f5
    History
    Representation-polymorphic HasField (fixes #22156)
    Adam Gundry authored and Marge Bot's avatar Marge Bot committed 
    This generalises the HasField class to support representation polymorphism,
so that instead of

    type HasField :: forall {k} . k -> Type -> Type -> Constraint

we have

    type HasField :: forall {k} {r_rep} {a_rep} . k -> TYPE r_rep -> TYPE a_rep -> Constraint
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