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1. DerivErrMustBeEnumType :: TyCon -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

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

2. DerivErrMustHaveExactlyOneConstructor :: TyCon -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   The given TyCon must have precisely one constructor.

3. DerivErrMustHaveSomeParameters :: TyCon -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   The given data type must have some parameters.

4. DerivErrMustNotHaveClassContext :: TyCon -> ThetaType -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   The given data type must not have a class context.

5. DerivErrNewtypeNonDeriveableClass :: DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   No documentation available.

6. DerivErrNoConstructors :: TyCon -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   The given (representation of the) TyCon has no data constructors.

7. DerivErrNoEtaReduce :: Type -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   The instance type | We cannot derive instances in boot files

8. DerivErrNoFamilyInstance :: TyCon -> [Type] -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   No documentation available.

9. DerivErrNotAClass :: PredType -> DeriveInstanceErrReason

   ghc	GHC.Tc.Errors.Types

   The given PredType is not a class.

10. DerivErrNotDeriveable :: DeriveAnyClassEnabled -> DeriveInstanceErrReason

    ghc	GHC.Tc.Errors.Types

    No documentation available.

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