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1. DerivErrGenericsMustNotHaveDatatypeContext :: TyCon -> DeriveGenericsErrReason

   ghc-lib-parser	GHC.Tc.Errors.Types

   The type must not have some datatype context.

2. DerivErrGenericsMustNotHaveExistentials :: DataCon -> DeriveGenericsErrReason

   ghc-lib-parser	GHC.Tc.Errors.Types

   The data constructor must not have existential arguments.

3. DerivErrGenericsMustNotHaveExoticArgs :: DataCon -> DeriveGenericsErrReason

   ghc-lib-parser	GHC.Tc.Errors.Types

   The data constructor must not have exotic unlifted or polymorphic arguments.

4. DerivErrGenericsWrongArgKind :: DataCon -> DeriveGenericsErrReason

   ghc-lib-parser	GHC.Tc.Errors.Types

   The derivation applies a type to an argument involving the last parameter but the applied type is not of kind * -> *.

5. DerivErrHasAssociatedDatatypes :: HasAssociatedDataFamInsts -> AssociatedTyLastVarInKind -> AssociatedTyNotParamOverLastTyVar -> DeriveInstanceErrReason

   ghc-lib-parser	GHC.Tc.Errors.Types

   No documentation available.

6. DerivErrLangExtRequired :: Extension -> DeriveInstanceErrReason

   ghc-lib-parser	GHC.Tc.Errors.Types

   No documentation available.

7. DerivErrLastArgMustBeApp :: DeriveInstanceErrReason

   ghc-lib-parser	GHC.Tc.Errors.Types

   Last arg must be newtype or data application

8. DerivErrMustBeEnumType :: TyCon -> DeriveInstanceErrReason

   ghc-lib-parser	GHC.Tc.Errors.Types

   The given TyCon must be an enumeration. See Note [Enumeration types] in GHC.Core.TyCon

9. DerivErrMustHaveExactlyOneConstructor :: TyCon -> DeriveInstanceErrReason

   ghc-lib-parser	GHC.Tc.Errors.Types

   The given TyCon must have precisely one constructor.

10. DerivErrMustHaveSomeParameters :: TyCon -> DeriveInstanceErrReason

    ghc-lib-parser	GHC.Tc.Errors.Types

    The given data type must have some parameters.

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