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1. DerivErrCannotEtaReduceEnough :: Bool -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   No documentation available.

2. DerivErrDataConsNotAllInScope :: TyCon -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   No documentation available.

3. DerivErrDerivingViaWrongKind :: Kind -> Type -> Kind -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   No documentation available.

4. DerivErrDunnoHowToDeriveForType :: Type -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   GHC simply doesn't how to how derive the input Class for the given Type.

5. DerivErrEnumOrProduct :: DeriveInstanceErrReason -> DeriveInstanceErrReason -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   We couldn't derive an instance either because the type was not an enum type or because it did have more than one constructor.

6. DerivErrGNDUsedOnData :: DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   We cannot use GND on non-newtype types

7. DerivErrGenerics :: [DeriveGenericsErrReason] -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   We couldn't derive a Generic instance for the given type for a variety of reasons

8. DerivErrGenericsMustBeVanillaDataCon :: DataCon -> DeriveGenericsErrReason

   ghc	GHC.Tc.Errors.Types

   The data constructor must be a vanilla constructor.

9. DerivErrGenericsMustHaveSomeTypeParams :: TyCon -> DeriveGenericsErrReason

   ghc	GHC.Tc.Errors.Types

   The type must have some type parameters. check (d) from Note [Requirements for deriving Generic and Rep] in GHC.Tc.Deriv.Generics.

10. DerivErrGenericsMustNotHaveDatatypeContext :: TyCon -> DeriveGenericsErrReason

    ghc	GHC.Tc.Errors.Types

    The type must not have some datatype context.

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