Safe Haskell | None |
---|---|
Language | GHC2021 |
GHC.Tc.Errors.Types
Synopsis
- data TcRnMessage where
- TcRnUnknownMessage :: UnknownDiagnostic (DiagnosticOpts TcRnMessage) -> TcRnMessage
- TcRnInterfaceError :: !IfaceMessage -> TcRnMessage
- TcRnMessageWithInfo :: !UnitState -> !TcRnMessageDetailed -> TcRnMessage
- TcRnWithHsDocContext :: !HsDocContext -> !TcRnMessage -> TcRnMessage
- TcRnSolverReport :: SolverReportWithCtxt -> DiagnosticReason -> TcRnMessage
- TcRnSolverDepthError :: !Type -> !SubGoalDepth -> TcRnMessage
- TcRnRedundantConstraints :: [Id] -> (SkolemInfoAnon, Bool) -> TcRnMessage
- TcRnInaccessibleCode :: Implication -> SolverReportWithCtxt -> TcRnMessage
- TcRnInaccessibleCoAxBranch :: TyCon -> CoAxBranch -> TcRnMessage
- TcRnTypeDoesNotHaveFixedRuntimeRep :: !Type -> !FixedRuntimeRepProvenance -> !ErrInfo -> TcRnMessage
- TcRnImplicitLift :: Name -> !ErrInfo -> TcRnMessage
- TcRnUnusedPatternBinds :: HsBind GhcRn -> TcRnMessage
- TcRnUnusedQuantifiedTypeVar :: HsDocContext -> HsTyVarBndrExistentialFlag -> TcRnMessage
- TcRnDodgyImports :: !DodgyImportsReason -> TcRnMessage
- TcRnDodgyExports :: GlobalRdrElt -> TcRnMessage
- TcRnMissingImportList :: IE GhcPs -> TcRnMessage
- TcRnUnsafeDueToPlugin :: TcRnMessage
- TcRnModMissingRealSrcSpan :: Module -> TcRnMessage
- TcRnIdNotExportedFromModuleSig :: Name -> Module -> TcRnMessage
- TcRnIdNotExportedFromLocalSig :: Name -> TcRnMessage
- TcRnShadowedName :: OccName -> ShadowedNameProvenance -> TcRnMessage
- TcRnInvalidWarningCategory :: !WarningCategory -> TcRnMessage
- TcRnDuplicateWarningDecls :: !(LocatedN RdrName) -> !RdrName -> TcRnMessage
- TcRnSimplifierTooManyIterations :: Cts -> !IntWithInf -> WantedConstraints -> TcRnMessage
- TcRnIllegalPatSynDecl :: !(LIdP GhcPs) -> TcRnMessage
- TcRnLinearPatSyn :: !Type -> TcRnMessage
- TcRnEmptyRecordUpdate :: TcRnMessage
- TcRnIllegalFieldPunning :: !(Located RdrName) -> TcRnMessage
- TcRnIllegalWildcardsInRecord :: !RecordFieldPart -> TcRnMessage
- TcRnIllegalWildcardInType :: Maybe Name -> !BadAnonWildcardContext -> TcRnMessage
- TcRnIllegalNamedWildcardInTypeArgument :: RdrName -> TcRnMessage
- TcRnIllegalImplicitTyVarInTypeArgument :: RdrName -> TcRnMessage
- TcRnDuplicateFieldName :: !RecordFieldPart -> NonEmpty RdrName -> TcRnMessage
- TcRnIllegalViewPattern :: !(Pat GhcPs) -> TcRnMessage
- TcRnCharLiteralOutOfRange :: !Char -> TcRnMessage
- TcRnNegativeNumTypeLiteral :: HsTyLit GhcPs -> TcRnMessage
- TcRnIllegalWildcardsInConstructor :: !Name -> TcRnMessage
- TcRnIgnoringAnnotations :: [LAnnDecl GhcRn] -> TcRnMessage
- TcRnAnnotationInSafeHaskell :: TcRnMessage
- TcRnInvalidTypeApplication :: Type -> LHsWcType GhcRn -> TcRnMessage
- TcRnTagToEnumMissingValArg :: TcRnMessage
- TcRnTagToEnumUnspecifiedResTy :: Type -> TcRnMessage
- TcRnTagToEnumResTyNotAnEnum :: Type -> TcRnMessage
- TcRnTagToEnumResTyTypeData :: Type -> TcRnMessage
- TcRnArrowIfThenElsePredDependsOnResultTy :: TcRnMessage
- TcRnIllegalHsBootOrSigDecl :: !HsBootOrSig -> !BadBootDecls -> TcRnMessage
- TcRnBootMismatch :: !HsBootOrSig -> !BootMismatch -> TcRnMessage
- TcRnRecursivePatternSynonym :: LHsBinds GhcRn -> TcRnMessage
- TcRnPartialTypeSigTyVarMismatch :: Name -> Name -> Name -> LHsSigWcType GhcRn -> TcRnMessage
- TcRnPartialTypeSigBadQuantifier :: Name -> Name -> Maybe Type -> LHsSigWcType GhcRn -> TcRnMessage
- TcRnMissingSignature :: MissingSignature -> Exported -> TcRnMessage
- TcRnPolymorphicBinderMissingSig :: Name -> Type -> TcRnMessage
- TcRnOverloadedSig :: TcIdSig -> TcRnMessage
- TcRnTupleConstraintInst :: !Class -> TcRnMessage
- TcRnUserTypeError :: !Type -> TcRnMessage
- TcRnConstraintInKind :: !Type -> TcRnMessage
- TcRnUnboxedTupleOrSumTypeFuncArg :: UnboxedTupleOrSum -> !Type -> TcRnMessage
- TcRnLinearFuncInKind :: !Type -> TcRnMessage
- TcRnForAllEscapeError :: !Type -> !Kind -> TcRnMessage
- TcRnVDQInTermType :: !(Maybe Type) -> TcRnMessage
- TcRnBadQuantPredHead :: !Type -> TcRnMessage
- TcRnIllegalTupleConstraint :: !Type -> TcRnMessage
- TcRnNonTypeVarArgInConstraint :: !Type -> TcRnMessage
- TcRnIllegalImplicitParam :: !Type -> TcRnMessage
- TcRnIllegalConstraintSynonymOfKind :: !Type -> TcRnMessage
- TcRnOversaturatedVisibleKindArg :: !Type -> TcRnMessage
- TcRnForAllRankErr :: !Rank -> !Type -> TcRnMessage
- TcRnSimplifiableConstraint :: !PredType -> !InstanceWhat -> TcRnMessage
- TcRnArityMismatch :: !TyThing -> !Arity -> !Arity -> TcRnMessage
- TcRnIllegalInstance :: IllegalInstanceReason -> TcRnMessage
- TcRnMonomorphicBindings :: [Name] -> TcRnMessage
- TcRnOrphanInstance :: Either ClsInst FamInst -> TcRnMessage
- TcRnFunDepConflict :: !UnitState -> NonEmpty ClsInst -> TcRnMessage
- TcRnDupInstanceDecls :: !UnitState -> NonEmpty ClsInst -> TcRnMessage
- TcRnConflictingFamInstDecls :: NonEmpty FamInst -> TcRnMessage
- TcRnFamInstNotInjective :: InjectivityErrReason -> TyCon -> NonEmpty CoAxBranch -> TcRnMessage
- TcRnBangOnUnliftedType :: !Type -> TcRnMessage
- TcRnLazyBangOnUnliftedType :: !Type -> TcRnMessage
- TcRnMultipleDefaultDeclarations :: [LDefaultDecl GhcRn] -> TcRnMessage
- TcRnBadDefaultType :: Type -> [Class] -> TcRnMessage
- TcRnPatSynBundledWithNonDataCon :: TcRnMessage
- TcRnPatSynBundledWithWrongType :: Type -> Type -> TcRnMessage
- TcRnDupeModuleExport :: ModuleName -> TcRnMessage
- TcRnExportedModNotImported :: ModuleName -> TcRnMessage
- TcRnNullExportedModule :: ModuleName -> TcRnMessage
- TcRnMissingExportList :: ModuleName -> TcRnMessage
- TcRnExportHiddenComponents :: IE GhcPs -> TcRnMessage
- TcRnDuplicateExport :: GlobalRdrElt -> IE GhcPs -> IE GhcPs -> TcRnMessage
- TcRnExportedParentChildMismatch :: Name -> TyThing -> Name -> [Name] -> TcRnMessage
- TcRnConflictingExports :: OccName -> GlobalRdrElt -> IE GhcPs -> GlobalRdrElt -> IE GhcPs -> TcRnMessage
- TcRnDuplicateFieldExport :: (GlobalRdrElt, IE GhcPs) -> NonEmpty (GlobalRdrElt, IE GhcPs) -> TcRnMessage
- TcRnAmbiguousRecordUpdate :: HsExpr GhcRn -> TyCon -> TcRnMessage
- TcRnMissingFields :: ConLike -> [(FieldLabelString, TcType)] -> TcRnMessage
- TcRnFieldUpdateInvalidType :: [(FieldLabelString, TcType)] -> TcRnMessage
- TcRnMissingStrictFields :: ConLike -> [(FieldLabelString, TcType)] -> TcRnMessage
- TcRnAmbiguousFieldInUpdate :: (GlobalRdrElt, GlobalRdrElt, [GlobalRdrElt]) -> TcRnMessage
- TcRnBadRecordUpdate :: [RdrName] -> BadRecordUpdateReason -> TcRnMessage
- TcRnStaticFormNotClosed :: Name -> NotClosedReason -> TcRnMessage
- TcRnUselessTypeable :: TcRnMessage
- TcRnDerivingDefaults :: !Class -> TcRnMessage
- TcRnNonUnaryTypeclassConstraint :: !(LHsSigType GhcRn) -> TcRnMessage
- TcRnPartialTypeSignatures :: !SuggestPartialTypeSignatures -> !ThetaType -> TcRnMessage
- TcRnCannotDeriveInstance :: !Class -> [Type] -> !(Maybe (DerivStrategy GhcTc)) -> !UsingGeneralizedNewtypeDeriving -> !DeriveInstanceErrReason -> TcRnMessage
- TcRnLazyGADTPattern :: TcRnMessage
- TcRnArrowProcGADTPattern :: TcRnMessage
- TcRnCapturedTermName :: RdrName -> Either [GlobalRdrElt] Name -> TcRnMessage
- TcRnTypeEqualityOutOfScope :: TcRnMessage
- TcRnTypeEqualityRequiresOperators :: TcRnMessage
- TcRnIllegalTypeOperator :: !SDoc -> !RdrName -> TcRnMessage
- TcRnIllegalTypeOperatorDecl :: !RdrName -> TcRnMessage
- TcRnGADTMonoLocalBinds :: TcRnMessage
- TcRnNotInScope :: NotInScopeError -> RdrName -> [ImportError] -> [GhcHint] -> TcRnMessage
- TcRnTermNameInType :: RdrName -> [GhcHint] -> TcRnMessage
- TcRnUntickedPromotedThing :: UntickedPromotedThing -> TcRnMessage
- TcRnIllegalBuiltinSyntax :: SDoc -> RdrName -> TcRnMessage
- TcRnWarnDefaulting :: [Ct] -> Maybe TyVar -> Type -> TcRnMessage
- TcRnIncorrectNameSpace :: Name -> Bool -> TcRnMessage
- TcRnForeignImportPrimExtNotSet :: ForeignImport GhcRn -> TcRnMessage
- TcRnForeignImportPrimSafeAnn :: ForeignImport GhcRn -> TcRnMessage
- TcRnForeignFunctionImportAsValue :: ForeignImport GhcRn -> TcRnMessage
- TcRnFunPtrImportWithoutAmpersand :: ForeignImport GhcRn -> TcRnMessage
- TcRnIllegalForeignDeclBackend :: Either (ForeignExport GhcRn) (ForeignImport GhcRn) -> Backend -> ExpectedBackends -> TcRnMessage
- TcRnUnsupportedCallConv :: Either (ForeignExport GhcRn) (ForeignImport GhcRn) -> UnsupportedCallConvention -> TcRnMessage
- TcRnIllegalForeignType :: !(Maybe ArgOrResult) -> !IllegalForeignTypeReason -> TcRnMessage
- TcRnInvalidCIdentifier :: !CLabelString -> TcRnMessage
- TcRnExpectedValueId :: !TcTyThing -> TcRnMessage
- TcRnRecSelectorEscapedTyVar :: !OccName -> TcRnMessage
- TcRnPatSynNotBidirectional :: !Name -> TcRnMessage
- TcRnIllegalDerivingItem :: !(LHsSigType GhcRn) -> TcRnMessage
- TcRnUnexpectedAnnotation :: !(HsType GhcRn) -> !HsSrcBang -> TcRnMessage
- TcRnIllegalRecordSyntax :: Either (HsType GhcPs) (HsType GhcRn) -> TcRnMessage
- TcRnInvalidVisibleKindArgument :: !(LHsType GhcRn) -> !Type -> TcRnMessage
- TcRnTooManyBinders :: !Kind -> ![LHsTyVarBndr (HsBndrVis GhcRn) GhcRn] -> TcRnMessage
- TcRnDifferentNamesForTyVar :: !Name -> !Name -> TcRnMessage
- TcRnDisconnectedTyVar :: !Name -> TcRnMessage
- TcRnInvalidReturnKind :: !DataSort -> !AllowedDataResKind -> !Kind -> !(Maybe SuggestUnliftedTypes) -> TcRnMessage
- TcRnUnexpectedKindVar :: RdrName -> TcRnMessage
- TcRnIllegalKind :: HsTypeOrSigType GhcPs -> Bool -> TcRnMessage
- TcRnClassKindNotConstraint :: !Kind -> TcRnMessage
- TcRnUnpromotableThing :: !Name -> !PromotionErr -> TcRnMessage
- TcRnIllegalTermLevelUse :: !Name -> !TermLevelUseErr -> TcRnMessage
- TcRnMatchesHaveDiffNumArgs :: !HsMatchContextRn -> !MatchArgBadMatches -> TcRnMessage
- TcRnUnexpectedPatSigType :: HsPatSigType GhcPs -> TcRnMessage
- TcRnIllegalKindSignature :: HsType GhcPs -> TcRnMessage
- TcRnDataKindsError :: TypeOrKind -> Either (HsType GhcPs) Type -> TcRnMessage
- TcRnCannotBindScopedTyVarInPatSig :: !(NonEmpty (Name, TcTyVar)) -> TcRnMessage
- TcRnCannotBindTyVarsInPatBind :: !(NonEmpty (Name, TcTyVar)) -> TcRnMessage
- TcRnTooManyTyArgsInConPattern :: !ConLike -> !Int -> !Int -> TcRnMessage
- TcRnMultipleInlinePragmas :: !Id -> !(LocatedA InlinePragma) -> !(NonEmpty (LocatedA InlinePragma)) -> TcRnMessage
- TcRnUnexpectedPragmas :: !Id -> !(NonEmpty (LSig GhcRn)) -> TcRnMessage
- TcRnNonOverloadedSpecialisePragma :: !(LIdP GhcRn) -> TcRnMessage
- TcRnSpecialiseNotVisible :: !Name -> TcRnMessage
- TcRnPragmaWarning :: {..} -> TcRnMessage
- TcRnDifferentExportWarnings :: !Name -> NonEmpty SrcSpan -> TcRnMessage
- TcRnIncompleteExportWarnings :: !Name -> NonEmpty SrcSpan -> TcRnMessage
- TcRnIllegalHsigDefaultMethods :: !Name -> NonEmpty (LHsBind GhcRn) -> TcRnMessage
- TcRnHsigFixityMismatch :: !TyThing -> !Fixity -> !Fixity -> TcRnMessage
- TcRnHsigShapeMismatch :: !HsigShapeMismatchReason -> TcRnMessage
- TcRnHsigMissingModuleExport :: !OccName -> !UnitState -> !Module -> TcRnMessage
- TcRnBadGenericMethod :: !Name -> !Name -> TcRnMessage
- TcRnWarningMinimalDefIncomplete :: ClassMinimalDef -> TcRnMessage
- TcRnIllegalQuasiQuotes :: TcRnMessage
- TcRnTHError :: THError -> TcRnMessage
- TcRnDefaultMethodForPragmaLacksBinding :: Id -> Sig GhcRn -> TcRnMessage
- TcRnIgnoreSpecialisePragmaOnDefMethod :: !Name -> TcRnMessage
- TcRnBadMethodErr :: {..} -> TcRnMessage
- TcRnIllegalNewtype :: DataCon -> Bool -> IllegalNewtypeReason -> TcRnMessage
- TcRnIllegalTypeData :: TcRnMessage
- TcRnTypeDataForbids :: !TypeDataForbids -> TcRnMessage
- TcRnUnsatisfiedMinimalDef :: ClassMinimalDef -> TcRnMessage
- TcRnMisplacedInstSig :: Name -> LHsSigType GhcRn -> TcRnMessage
- TcRnNoRebindableSyntaxRecordDot :: TcRnMessage
- TcRnNoFieldPunsRecordDot :: TcRnMessage
- TcRnIllegalStaticExpression :: HsExpr GhcPs -> TcRnMessage
- TcRnListComprehensionDuplicateBinding :: Name -> TcRnMessage
- TcRnEmptyStmtsGroup :: EmptyStatementGroupErrReason -> TcRnMessage
- TcRnLastStmtNotExpr :: HsStmtContextRn -> UnexpectedStatement -> TcRnMessage
- TcRnUnexpectedStatementInContext :: HsStmtContextRn -> UnexpectedStatement -> Maybe Extension -> TcRnMessage
- TcRnIllegalTupleSection :: TcRnMessage
- TcRnIllegalImplicitParameterBindings :: Either (HsLocalBindsLR GhcPs GhcPs) (HsLocalBindsLR GhcRn GhcPs) -> TcRnMessage
- TcRnSectionWithoutParentheses :: HsExpr GhcPs -> TcRnMessage
- TcRnBindingOfExistingName :: RdrName -> TcRnMessage
- TcRnMultipleFixityDecls :: SrcSpan -> RdrName -> TcRnMessage
- TcRnIllegalPatternSynonymDecl :: TcRnMessage
- TcRnIllegalClassBinding :: DeclSort -> HsBindLR GhcPs GhcPs -> TcRnMessage
- TcRnOrphanCompletePragma :: TcRnMessage
- TcRnEmptyCase :: HsMatchContextRn -> TcRnMessage
- TcRnNonStdGuards :: NonStandardGuards -> TcRnMessage
- TcRnDuplicateSigDecl :: NonEmpty (LocatedN RdrName, Sig GhcPs) -> TcRnMessage
- TcRnMisplacedSigDecl :: Sig GhcRn -> TcRnMessage
- TcRnUnexpectedDefaultSig :: Sig GhcPs -> TcRnMessage
- TcRnDuplicateMinimalSig :: LSig GhcPs -> LSig GhcPs -> [LSig GhcPs] -> TcRnMessage
- TcRnIllegalInvisTyVarBndr :: !(LHsTyVarBndr (HsBndrVis GhcRn) GhcRn) -> TcRnMessage
- TcRnInvalidInvisTyVarBndr :: !Name -> !(LHsTyVarBndr (HsBndrVis GhcRn) GhcRn) -> TcRnMessage
- TcRnInvisBndrWithoutSig :: !Name -> !(LHsTyVarBndr (HsBndrVis GhcRn) GhcRn) -> TcRnMessage
- TcRnDeprecatedInvisTyArgInConPat :: TcRnMessage
- TcRnUnexpectedStandaloneDerivingDecl :: TcRnMessage
- TcRnUnusedVariableInRuleDecl :: FastString -> Name -> TcRnMessage
- TcRnUnexpectedStandaloneKindSig :: TcRnMessage
- TcRnIllegalRuleLhs :: RuleLhsErrReason -> FastString -> LHsExpr GhcRn -> HsExpr GhcRn -> TcRnMessage
- TcRnDuplicateRoleAnnot :: NonEmpty (LRoleAnnotDecl GhcPs) -> TcRnMessage
- TcRnDuplicateKindSig :: NonEmpty (LStandaloneKindSig GhcPs) -> TcRnMessage
- TcRnIllegalDerivStrategy :: DerivStrategy GhcPs -> TcRnMessage
- TcRnIllegalMultipleDerivClauses :: TcRnMessage
- TcRnNoDerivStratSpecified :: Bool -> TcRnMessage
- TcRnStupidThetaInGadt :: HsDocContext -> TcRnMessage
- TcRnShadowedTyVarNameInFamResult :: IdP GhcPs -> TcRnMessage
- TcRnIncorrectTyVarOnLhsOfInjCond :: IdP GhcRn -> LIdP GhcPs -> TcRnMessage
- TcRnUnknownTyVarsOnRhsOfInjCond :: [Name] -> TcRnMessage
- TcRnLookupInstance :: !Class -> ![Type] -> !LookupInstanceErrReason -> TcRnMessage
- TcRnBadlyStaged :: !StageCheckReason -> !Int -> !Int -> TcRnMessage
- TcRnStageRestriction :: !StageCheckReason -> TcRnMessage
- TcRnBadlyStagedType :: !Name -> !Int -> !Int -> TcRnMessage
- TcRnTyThingUsedWrong :: !WrongThingSort -> !TcTyThing -> !Name -> TcRnMessage
- TcRnCannotDefaultKindVar :: !TyVar -> !Kind -> TcRnMessage
- TcRnUninferrableTyVar :: ![TyCoVar] -> !UninferrableTyVarCtx -> TcRnMessage
- TcRnSkolemEscape :: ![TcTyVar] -> !TcTyVar -> !Type -> TcRnMessage
- TcRnPatSynEscapedCoercion :: !Id -> !(NonEmpty CoVar) -> TcRnMessage
- TcRnPatSynExistentialInResult :: !Name -> !TcSigmaType -> ![TyVar] -> TcRnMessage
- TcRnPatSynArityMismatch :: !Name -> !Arity -> !Arity -> TcRnMessage
- TcRnPatSynInvalidRhs :: !Name -> !(LPat GhcRn) -> ![LIdP GhcRn] -> !PatSynInvalidRhsReason -> TcRnMessage
- TcRnZonkerMessage :: ZonkerMessage -> TcRnMessage
- TcRnTyFamDepsDisabled :: TcRnMessage
- TcRnAbstractClosedTyFamDecl :: TcRnMessage
- TcRnPartialFieldSelector :: !FieldLabel -> TcRnMessage
- TcRnHasFieldResolvedIncomplete :: !Name -> TcRnMessage
- TcRnBadFieldAnnotation :: !Int -> !DataCon -> !BadFieldAnnotationReason -> TcRnMessage
- TcRnSuperclassCycle :: !SuperclassCycle -> TcRnMessage
- TcRnDefaultSigMismatch :: !Id -> !Type -> TcRnMessage
- TcRnTyFamsDisabled :: !TyFamsDisabledReason -> TcRnMessage
- TcRnBadTyConTelescope :: !TyCon -> TcRnMessage
- TcRnTyFamResultDisabled :: !Name -> !(LHsTyVarBndr () GhcRn) -> TcRnMessage
- TcRnRoleValidationFailed :: !Role -> !RoleValidationFailedReason -> TcRnMessage
- TcRnCommonFieldResultTypeMismatch :: !DataCon -> !DataCon -> !FieldLabelString -> TcRnMessage
- TcRnCommonFieldTypeMismatch :: !DataCon -> !DataCon -> !FieldLabelString -> TcRnMessage
- TcRnClassExtensionDisabled :: !Class -> !DisabledClassExtension -> TcRnMessage
- TcRnDataConParentTypeMismatch :: !DataCon -> !Type -> TcRnMessage
- TcRnGADTsDisabled :: !Name -> TcRnMessage
- TcRnExistentialQuantificationDisabled :: !DataCon -> TcRnMessage
- TcRnGADTDataContext :: !Name -> TcRnMessage
- TcRnMultipleConForNewtype :: !Name -> !Int -> TcRnMessage
- TcRnKindSignaturesDisabled :: !(Either (HsType GhcPs) (Name, HsType GhcRn)) -> TcRnMessage
- TcRnEmptyDataDeclsDisabled :: !Name -> TcRnMessage
- TcRnRoleMismatch :: !Name -> !Role -> !Role -> TcRnMessage
- TcRnRoleCountMismatch :: !Int -> !(LRoleAnnotDecl GhcRn) -> TcRnMessage
- TcRnIllegalRoleAnnotation :: !(RoleAnnotDecl GhcRn) -> TcRnMessage
- TcRnRoleAnnotationsDisabled :: !TyCon -> TcRnMessage
- TcRnIncoherentRoles :: !TyCon -> TcRnMessage
- TcRnPrecedenceParsingError :: (OpName, Fixity) -> (OpName, Fixity) -> TcRnMessage
- TcRnSectionPrecedenceError :: (OpName, Fixity) -> (OpName, Fixity) -> HsExpr GhcPs -> TcRnMessage
- TcRnTypeSynonymCycle :: !TySynCycleTyCons -> TcRnMessage
- TcRnSelfImport :: !ModuleName -> TcRnMessage
- TcRnNoExplicitImportList :: !ModuleName -> TcRnMessage
- TcRnSafeImportsDisabled :: !ModuleName -> TcRnMessage
- TcRnDeprecatedModule :: !ModuleName -> !(WarningTxt GhcRn) -> TcRnMessage
- TcRnCompatUnqualifiedImport :: !(ImportDecl GhcPs) -> TcRnMessage
- TcRnRedundantSourceImport :: !ModuleName -> TcRnMessage
- TcRnImportLookup :: !ImportLookupReason -> TcRnMessage
- TcRnUnusedImport :: !(ImportDecl GhcRn) -> !UnusedImportReason -> TcRnMessage
- TcRnDuplicateDecls :: !OccName -> !(NonEmpty Name) -> TcRnMessage
- TcRnPackageImportsDisabled :: TcRnMessage
- TcRnIllegalDataCon :: !RdrName -> TcRnMessage
- TcRnNestedForallsContexts :: !NestedForallsContextsIn -> TcRnMessage
- TcRnRedundantRecordWildcard :: TcRnMessage
- TcRnUnusedRecordWildcard :: ![Name] -> TcRnMessage
- TcRnUnusedName :: !OccName -> !UnusedNameProv -> TcRnMessage
- TcRnQualifiedBinder :: !RdrName -> TcRnMessage
- TcRnTypeApplicationsDisabled :: !TypeApplication -> TcRnMessage
- TcRnInvalidRecordField :: !Name -> !FieldLabelString -> TcRnMessage
- TcRnTupleTooLarge :: !Int -> TcRnMessage
- TcRnCTupleTooLarge :: !Int -> TcRnMessage
- TcRnIllegalInferredTyVars :: !(NonEmpty (HsTyVarBndr Specificity GhcPs)) -> TcRnMessage
- TcRnAmbiguousName :: !GlobalRdrEnv -> !RdrName -> !(NonEmpty GlobalRdrElt) -> TcRnMessage
- TcRnBindingNameConflict :: !RdrName -> !(NonEmpty SrcSpan) -> TcRnMessage
- TcRnNonCanonicalDefinition :: !NonCanonicalDefinition -> !(LHsSigType GhcRn) -> TcRnMessage
- TcRnImplicitImportOfPrelude :: TcRnMessage
- TcRnMissingMain :: !Bool -> !Module -> !OccName -> TcRnMessage
- TcRnGhciUnliftedBind :: !Id -> TcRnMessage
- TcRnGhciMonadLookupFail :: String -> Maybe [GlobalRdrElt] -> TcRnMessage
- TcRnMissingRoleAnnotation :: Name -> [Role] -> TcRnMessage
- TcRnPatersonCondFailure :: PatersonCondFailure -> PatersonCondFailureContext -> Type -> Type -> TcRnMessage
- TcRnImplicitRhsQuantification :: LocatedN RdrName -> TcRnMessage
- TcRnIllformedTypePattern :: !(Pat GhcRn) -> TcRnMessage
- TcRnIllegalTypePattern :: TcRnMessage
- TcRnIllformedTypeArgument :: !(LHsExpr GhcRn) -> TcRnMessage
- TcRnIllegalTypeExpr :: TcRnMessage
- TcRnInvalidDefaultedTyVar :: ![Ct] -> [(TcTyVar, Type)] -> NonEmpty TcTyVar -> TcRnMessage
- TcRnNamespacedWarningPragmaWithoutFlag :: WarnDecl GhcPs -> TcRnMessage
- TcRnInvisPatWithNoForAll :: HsTyPat GhcRn -> TcRnMessage
- TcRnIllegalInvisibleTypePattern :: HsTyPat GhcPs -> TcRnMessage
- TcRnNamespacedFixitySigWithoutFlag :: FixitySig GhcPs -> TcRnMessage
- TcRnDefaultedExceptionContext :: CtLoc -> TcRnMessage
- TcRnOutOfArityTyVar :: Name -> Name -> TcRnMessage
- TcRnMisplacedInvisPat :: HsTyPat GhcPs -> TcRnMessage
- data TcRnMessageOpts = TcRnMessageOpts {}
- mkTcRnUnknownMessage :: (Diagnostic a, Typeable a, DiagnosticOpts a ~ NoDiagnosticOpts) => a -> TcRnMessage
- data TcRnMessageDetailed = TcRnMessageDetailed !ErrInfo !TcRnMessage
- data TypeDataForbids
- data ErrInfo = ErrInfo {}
- data FixedRuntimeRepProvenance
- pprFixedRuntimeRepProvenance :: FixedRuntimeRepProvenance -> SDoc
- data ShadowedNameProvenance
- data RecordFieldPart
- data IllegalNewtypeReason
- data BadRecordUpdateReason
- data InjectivityErrReason
- data HasKinds
- hasKinds :: Bool -> HasKinds
- data SuggestUndecidableInstances
- suggestUndecidableInstances :: Bool -> SuggestUndecidableInstances
- data SuggestUnliftedTypes
- data DataSort
- ppDataSort :: DataSort -> SDoc
- data AllowedDataResKind
- data NotClosedReason
- data SuggestPartialTypeSignatures
- suggestPartialTypeSignatures :: Bool -> SuggestPartialTypeSignatures
- data DeriveInstanceErrReason
- = DerivErrNotWellKinded !TyCon !Kind !Int
- | DerivErrSafeHaskellGenericInst
- | DerivErrDerivingViaWrongKind !Kind !Type !Kind
- | DerivErrNoEtaReduce !Type
- | DerivErrBootFileFound
- | DerivErrDataConsNotAllInScope !TyCon
- | DerivErrGNDUsedOnData
- | DerivErrNullaryClasses
- | DerivErrLastArgMustBeApp
- | DerivErrNoFamilyInstance !TyCon [Type]
- | DerivErrNotStockDeriveable !DeriveAnyClassEnabled
- | DerivErrHasAssociatedDatatypes !HasAssociatedDataFamInsts !AssociatedTyLastVarInKind !AssociatedTyNotParamOverLastTyVar
- | DerivErrNewtypeNonDeriveableClass
- | DerivErrCannotEtaReduceEnough !Bool
- | DerivErrOnlyAnyClassDeriveable !TyCon !DeriveAnyClassEnabled
- | DerivErrNotDeriveable !DeriveAnyClassEnabled
- | DerivErrNotAClass !PredType
- | DerivErrNoConstructors !TyCon
- | DerivErrLangExtRequired !Extension
- | DerivErrDunnoHowToDeriveForType !Type
- | DerivErrMustBeEnumType !TyCon
- | DerivErrMustHaveExactlyOneConstructor !TyCon
- | DerivErrMustHaveSomeParameters !TyCon
- | DerivErrMustNotHaveClassContext !TyCon !ThetaType
- | DerivErrBadConstructor !(Maybe HasWildcard) [DeriveInstanceBadConstructor]
- | DerivErrGenerics [DeriveGenericsErrReason]
- | DerivErrEnumOrProduct !DeriveInstanceErrReason !DeriveInstanceErrReason
- data UsingGeneralizedNewtypeDeriving
- usingGeneralizedNewtypeDeriving :: Bool -> UsingGeneralizedNewtypeDeriving
- data DeriveAnyClassEnabled
- deriveAnyClassEnabled :: Bool -> DeriveAnyClassEnabled
- data DeriveInstanceBadConstructor
- data HasWildcard
- hasWildcard :: Bool -> HasWildcard
- data BadAnonWildcardContext
- data SoleExtraConstraintWildcardAllowed
- data DeriveGenericsErrReason
- data HasAssociatedDataFamInsts
- hasAssociatedDataFamInsts :: Bool -> HasAssociatedDataFamInsts
- data AssociatedTyLastVarInKind
- associatedTyLastVarInKind :: Maybe TyCon -> AssociatedTyLastVarInKind
- data AssociatedTyNotParamOverLastTyVar
- associatedTyNotParamOverLastTyVar :: Maybe TyCon -> AssociatedTyNotParamOverLastTyVar
- data MissingSignature
- data Exported
- data HsDocContext
- = TypeSigCtx SDoc
- | StandaloneKindSigCtx SDoc
- | PatCtx
- | SpecInstSigCtx
- | DefaultDeclCtx
- | ForeignDeclCtx (LocatedN RdrName)
- | DerivDeclCtx
- | RuleCtx FastString
- | TyDataCtx (LocatedN RdrName)
- | TySynCtx (LocatedN RdrName)
- | TyFamilyCtx (LocatedN RdrName)
- | FamPatCtx (LocatedN RdrName)
- | ConDeclCtx [LocatedN Name]
- | ClassDeclCtx (LocatedN RdrName)
- | ExprWithTySigCtx
- | TypBrCtx
- | HsTypeCtx
- | HsTypePatCtx
- | GHCiCtx
- | SpliceTypeCtx (LHsType GhcPs)
- | ClassInstanceCtx
- | GenericCtx SDoc
- data FixedRuntimeRepErrorInfo = FRR_Info {}
- data ErrorItem = EI {}
- errorItemOrigin :: ErrorItem -> CtOrigin
- errorItemEqRel :: ErrorItem -> EqRel
- errorItemPred :: ErrorItem -> PredType
- errorItemCtLoc :: ErrorItem -> CtLoc
- data SolverReport = SolverReport {}
- data SolverReportSupplementary
- data SolverReportWithCtxt = SolverReportWithCtxt {}
- data SolverReportErrCtxt = CEC {}
- getUserGivens :: SolverReportErrCtxt -> [UserGiven]
- discardProvCtxtGivens :: CtOrigin -> [UserGiven] -> [UserGiven]
- data TcSolverReportMsg
- = BadTelescope TyVarBndrs [TyCoVar]
- | UserTypeError ErrorMsgType
- | UnsatisfiableError ErrorMsgType
- | ReportHoleError Hole HoleError
- | CannotUnifyVariable { }
- | Mismatch { }
- | FixedRuntimeRepError [FixedRuntimeRepErrorInfo]
- | BlockedEquality ErrorItem
- | ExpectingMoreArguments Int TypedThing
- | UnboundImplicitParams (NonEmpty ErrorItem)
- | AmbiguityPreventsSolvingCt ErrorItem ([TyVar], [TyVar])
- | CannotResolveInstance { }
- | OverlappingInstances { }
- | UnsafeOverlap { }
- data CannotUnifyVariableReason
- data MismatchMsg
- = BasicMismatch { }
- | KindMismatch { }
- | TypeEqMismatch { }
- | CouldNotDeduce { }
- data MismatchEA
- mkPlainMismatchMsg :: MismatchMsg -> TcSolverReportMsg
- mkBasicMismatchMsg :: MismatchEA -> ErrorItem -> Type -> Type -> MismatchMsg
- data WhenMatching = WhenMatching TcType TcType CtOrigin (Maybe TypeOrKind)
- data ExpectedActualInfo
- data TyVarInfo = TyVarInfo {}
- data SameOccInfo = SameOcc {}
- data AmbiguityInfo
- = Ambiguity {
- lead_with_ambig_msg :: Bool
- ambig_tyvars :: ([TyVar], [TyVar])
- | NonInjectiveTyFam TyCon
- = Ambiguity {
- data CND_Extra = CND_Extra TypeOrKind Type Type
- data FitsMbSuppressed = Fits {
- fits :: [HoleFit]
- fitsSuppressed :: Bool
- data ValidHoleFits = ValidHoleFits {}
- noValidHoleFits :: ValidHoleFits
- data HoleFitDispConfig = HFDC {
- showWrap :: Bool
- showWrapVars :: Bool
- showType :: Bool
- showProv :: Bool
- showMatches :: Bool
- data RelevantBindings = RelevantBindings {
- relevantBindingNamesAndTys :: [(Name, Type)]
- ranOutOfFuel :: Bool
- pprRelevantBindings :: RelevantBindings -> SDoc
- data PromotionErr
- pprPECategory :: PromotionErr -> SDoc
- peCategory :: PromotionErr -> String
- data TermLevelUseErr
- teCategory :: TermLevelUseErr -> String
- data NotInScopeError
- mkTcRnNotInScope :: RdrName -> NotInScopeError -> TcRnMessage
- data ImportError
- data HoleError
- = OutOfScopeHole [ImportError] [GhcHint]
- | HoleError HoleSort [TcTyVar] [(SkolemInfoAnon, [TcTyVar])]
- data CoercibleMsg
- data PotentialInstances = PotentialInstances {}
- data UnsupportedCallConvention
- type ExpectedBackends = [Backend]
- data ArgOrResult
- data MatchArgsContext
- data MatchArgBadMatches where
- MatchArgMatches :: forall body. {..} -> MatchArgBadMatches
- data PragmaWarningInfo
- data EmptyStatementGroupErrReason
- data UnexpectedStatement where
- UnexpectedStatement :: forall body. Outputable (StmtLR GhcPs GhcPs body) => StmtLR GhcPs GhcPs body -> UnexpectedStatement
- data DeclSort
- data NonStandardGuards where
- NonStandardGuards :: forall body. (Outputable body, Anno (Stmt GhcRn body) ~ SrcSpanAnnA) => [LStmtLR GhcRn GhcRn body] -> NonStandardGuards
- data RuleLhsErrReason
- data HsigShapeMismatchReason
- data WrongThingSort
- data StageCheckReason
- data UninferrableTyVarCtx
- data PatSynInvalidRhsReason
- data BadFieldAnnotationReason where
- data SuperclassCycle = MkSuperclassCycle {}
- data SuperclassCycleDetail
- data RoleValidationFailedReason
- data DisabledClassExtension where
- data TyFamsDisabledReason
- data TypeApplication
- data HsTypeOrSigType p
- data HsTyVarBndrExistentialFlag = OutputableBndrFlag flag 'Renamed => HsTyVarBndrExistentialFlag (HsTyVarBndr flag GhcRn)
- type TySynCycleTyCons = [Either TyCon (LTyClDecl GhcRn)]
- data BadImportKind
- data DodgyImportsReason
- data ImportLookupReason where
- data UnusedImportReason where
- data UnusedImportName where
- data NestedForallsContextsIn
- data UnusedNameProv
- data NonCanonicalDefinition
- data NonCanonical_Monoid
- data NonCanonical_Monad
- data BadBootDecls
- = BootBindsPs !(NonEmpty (LHsBindLR GhcRn GhcPs))
- | BootBindsRn !(NonEmpty (LHsBindLR GhcRn GhcRn))
- | BootInstanceSigs !(NonEmpty (LSig GhcRn))
- | BootFamInst !TyCon
- | BootSpliceDecls !(NonEmpty (LocatedA (HsUntypedSplice GhcPs)))
- | BootForeignDecls !(NonEmpty (LForeignDecl GhcRn))
- | BootDefaultDecls !(NonEmpty (LDefaultDecl GhcRn))
- | BootRuleDecls !(NonEmpty (LRuleDecls GhcRn))
- data MissingBootThing
- missingBootThing :: HsBootOrSig -> Name -> MissingBootThing -> TcRnMessage
- data BootMismatch
- data BootMismatchWhat
- data BootTyConMismatch
- = TyConKindMismatch
- | TyConRoleMismatch !Bool
- | TyConSynonymMismatch !Kind !Kind
- | TyConFlavourMismatch !FamTyConFlav !FamTyConFlav
- | TyConAxiomMismatch !(BootListMismatches CoAxBranch BootAxiomBranchMismatch)
- | TyConInjectivityMismatch
- | TyConMismatchedData !AlgTyConRhs !AlgTyConRhs !BootDataMismatch
- | TyConMismatchedClasses !Class !Class !BootClassMismatch
- | TyConsVeryDifferent
- | SynAbstractData !SynAbstractDataError
- data BootAxiomBranchMismatch
- data BootClassMismatch
- data BootMethodMismatch
- data BootATMismatch
- data BootDataMismatch
- data BootDataConMismatch
- data SynAbstractDataError
- data BootListMismatch item err
- = MismatchedLength
- | MismatchedThing !Int !item !item !err
- type BootListMismatches item err = NonEmpty (BootListMismatch item err)
- data IllegalInstanceReason
- data IllegalClassInstanceReason
- data IllegalInstanceHeadReason
- data IllegalHasFieldInstance
- data CoverageProblem = CoverageProblem {}
- data FailedCoverageCondition
- = FailedICC {
- alsoFailedLICC :: !Bool
- | FailedLICC
- = FailedICC {
- data IllegalFamilyInstanceReason
- = NotAFamilyTyCon !TypeOrData !TyCon
- | NotAnOpenFamilyTyCon !TyCon
- | FamilyCategoryMismatch !TyCon
- | FamilyArityMismatch !TyCon !Arity
- | TyFamNameMismatch !Name !Name
- | FamInstRHSOutOfScopeTyVars !(Maybe (TyCon, [Type], TyVarSet)) !(NonEmpty Name)
- | FamInstLHSUnusedBoundTyVars !(NonEmpty InvalidFamInstQTv)
- | InvalidAssoc !InvalidAssoc
- data InvalidFamInstQTv = InvalidFamInstQTv {}
- data InvalidFamInstQTvReason
- data InvalidAssoc
- data InvalidAssocInstance
- data InvalidAssocDefault
- data AssocDefaultBadArgs
- data THError
- = THSyntaxError !THSyntaxError
- | THNameError !THNameError
- | THReifyError !THReifyError
- | TypedTHError !TypedTHError
- | THSpliceFailed !SpliceFailReason
- | AddTopDeclsError !AddTopDeclsError
- | IllegalStaticFormInSplice !(HsExpr GhcPs)
- | FailedToLookupThInstName !Type !LookupTHInstNameErrReason
- | AddInvalidCorePlugin !String
- | AddDocToNonLocalDefn !DocLoc
- | ReportCustomQuasiError !Bool !String
- data THSyntaxError
- data THNameError
- data THReifyError
- data TypedTHError
- data SpliceFailReason
- data RunSpliceFailReason = ConversionFail !ThingBeingConverted !ConversionFailReason
- data AddTopDeclsError
- data ConversionFailReason
- = IllegalOccName !NameSpace !String
- | SumAltArityExceeded !SumAlt !SumArity
- | IllegalSumAlt !SumAlt
- | IllegalSumArity !SumArity
- | MalformedType !TypeOrKind !Type
- | IllegalLastStatement !HsDoFlavour !(LStmt GhcPs (LHsExpr GhcPs))
- | KindSigsOnlyAllowedOnGADTs
- | IllegalDeclaration !THDeclDescriptor !IllegalDecls
- | CannotMixGADTConsWith98Cons
- | EmptyStmtListInDoBlock
- | NonVarInInfixExpr
- | MultiWayIfWithoutAlts
- | CasesExprWithoutAlts
- | ImplicitParamsWithOtherBinds
- | InvalidCCallImpent !String
- | RecGadtNoCons
- | GadtNoCons
- | InvalidTypeInstanceHeader !Type
- | InvalidTyFamInstLHS !Type
- | InvalidImplicitParamBinding
- | DefaultDataInstDecl ![LDataFamInstDecl GhcPs]
- | FunBindLacksEquations !Name
- data UnrepresentableTypeDescr
- data LookupTHInstNameErrReason
- data SplicePhase
- data THDeclDescriptor
- data ThingBeingConverted
- data IllegalDecls
- = IllegalDecls !(NonEmpty (LHsDecl GhcPs))
- | IllegalFamDecls !(NonEmpty (LFamilyDecl GhcPs))
- data ZonkerMessage where
- data IllegalForeignTypeReason
- data TypeCannotBeMarshaledReason
Main types
data TcRnMessage where Source #
An error which might arise during typechecking/renaming.
Constructors
TcRnUnknownMessage :: UnknownDiagnostic (DiagnosticOpts TcRnMessage) -> TcRnMessage | Simply wraps an unknown |
TcRnInterfaceError :: !IfaceMessage -> TcRnMessage | Wrap an |
TcRnMessageWithInfo | TcRnMessageWithInfo is a constructor which is used when extra information is needed
to be provided in order to qualify a diagnostic and where it was originated (and why).
It carries an extra |
Fields
| |
TcRnWithHsDocContext :: !HsDocContext -> !TcRnMessage -> TcRnMessage | TcRnWithHsDocContext annotates an error message with the context in which it originated. |
TcRnSolverReport :: SolverReportWithCtxt -> DiagnosticReason -> TcRnMessage | TcRnSolverReport is the constructor used to report unsolved constraints after constraint solving, as well as other errors such as hole fit errors. See the documentation of |
TcRnSolverDepthError :: !Type -> !SubGoalDepth -> TcRnMessage | TcRnSolverDepthError is an error that occurs when the constraint solver exceeds the maximum recursion depth. Example: class C a where { meth :: a } instance Cls [a] => Cls a where { meth = head . meth } t :: () t = meth Test cases: T7788 T8550 T9554 T15316A T17267{∅,a,b,c,e} T17458 ContextStack1 T22924b TcCoercibleFail |
TcRnRedundantConstraints | TcRnRedundantConstraints is a warning that is emitted when a binding has a user-written type signature which contains superfluous constraints. Example: f :: (Eq a, Ord a) => a -> a -> a f x y = (x < y) || x == y -- `Eq a` is superfluous: the `Ord a` constraint suffices. Test cases: T9939, T10632, T18036a, T20602, PluralS, T19296. |
Fields
| |
TcRnInaccessibleCode | TcRnInaccessibleCode is a warning that is emitted when the RHS of a pattern match is inaccessible, because the constraint solver has detected a contradiction. Example: data B a where { MkTrue :: B True; MkFalse :: B False } foo :: B False -> Bool foo MkFalse = False foo MkTrue = True -- Inaccessible: requires True ~ False Test cases: T7293, T7294, T15558, T17646, T18572, T18610, tcfail167. |
Fields
| |
TcRnInaccessibleCoAxBranch | TcRnInaccessibleCoAxBranch is a warning that is emitted when a closed type family has a branch which is inaccessible due to a more general, prior branch. Example: type family F a where F a = Int F Bool = Bool Test cases: T9085, T14066a, T9085, T6018, tc265, |
Fields
| |
TcRnTypeDoesNotHaveFixedRuntimeRep :: !Type -> !FixedRuntimeRepProvenance -> !ErrInfo -> TcRnMessage | A type which was expected to have a fixed runtime representation does not have a fixed runtime representation. Example: data D (a :: TYPE r) = MkD a Test cases: T11724, T18534, RepPolyPatSynArg, RepPolyPatSynUnliftedNewtype, RepPolyPatSynRes, T20423 |
TcRnImplicitLift :: Name -> !ErrInfo -> TcRnMessage | TcRnImplicitLift is a warning (controlled with -Wimplicit-lift) that occurs when
a Template Haskell quote implicitly uses Example: warning1 :: Lift t => t -> Q Exp warning1 x = [| x |] Test cases: th/T17804 |
TcRnUnusedPatternBinds :: HsBind GhcRn -> TcRnMessage | TcRnUnusedPatternBinds is a warning (controlled with -Wunused-pattern-binds) that occurs if a pattern binding binds no variables at all, unless it is a lone wild-card pattern, or a banged pattern. Example: Just _ = rhs3 -- Warning: unused pattern binding (_, _) = rhs4 -- Warning: unused pattern binding _ = rhs3 -- No warning: lone wild-card pattern !() = rhs4 -- No warning: banged pattern; behaves like seq Test cases: rename/{T13646,T17c,T17e,T7085} |
TcRnUnusedQuantifiedTypeVar | TcRnUnusedQuantifiedTypeVar is a warning that occurs if there are unused quantified type variables. Examples: f :: forall a. Int -> Char Test cases: renameshould_compileExplicitForAllRules1 renameshould_compileT5331 |
Fields
| |
TcRnDodgyImports :: !DodgyImportsReason -> TcRnMessage | TcRnDodgyImports is a group of warnings (controlled with -Wdodgy-imports). See |
TcRnDodgyExports :: GlobalRdrElt -> TcRnMessage | TcRnDodgyExports is a warning (controlled by -Wdodgy-exports) that occurs when
an export of the form 'T(..)' for a type constructor Example: module Foo ( T(..) -- Warning: T is a type synonym , A(..) -- Warning: A is a type family , C(..) -- Warning: C is a data family ) where type T = Int type family A :: * -> * data family C :: * -> * Test cases: warningsshould_compileDodgyExports01 |
TcRnMissingImportList :: IE GhcPs -> TcRnMessage | TcRnMissingImportList is a warning (controlled by -Wmissing-import-lists) that occurs when an import declaration does not explicitly list all the names brought into scope. Test cases: renameshould_compileT4489 |
TcRnUnsafeDueToPlugin :: TcRnMessage | When a module marked trustworthy or unsafe (using -XTrustworthy or -XUnsafe) is compiled with a plugin, the TcRnUnsafeDueToPlugin warning (controlled by -Wunsafe) is used as the reason the module was inferred to be unsafe. This warning is not raised if the -fplugin-trustworthy flag is passed. Test cases: plugins/T19926 |
TcRnModMissingRealSrcSpan :: Module -> TcRnMessage | TcRnModMissingRealSrcSpan is an error that occurs when compiling a module that lacks
an associated Test cases: None |
TcRnIdNotExportedFromModuleSig :: Name -> Module -> TcRnMessage | TcRnIdNotExportedFromModuleSig is an error pertaining to backpack that occurs when an identifier required by a signature is not exported by the module or signature that is being used as a substitution for that signature. Example(s): None Test cases: backpackshould_failbkpfail36 |
TcRnIdNotExportedFromLocalSig :: Name -> TcRnMessage | TcRnIdNotExportedFromLocalSig is an error pertaining to backpack that occurs when an identifier which is necessary for implementing a module signature is not exported from that signature. Example(s): None Test cases: backpackshould_failbkpfail30 backpackshould_failbkpfail31 backpackshould_failbkpfail34 |
TcRnShadowedName :: OccName -> ShadowedNameProvenance -> TcRnMessage | TcRnShadowedName is a warning (controlled by -Wname-shadowing) that occurs whenever an inner-scope value has the same name as an outer-scope value, i.e. the inner value shadows the outer one. This can catch typographical errors that turn into hard-to-find bugs. The warning is suppressed for names beginning with an underscore. Examples(s):
f = ... let f = id in ... f ... -- NOT OK, Test cases: typecheckshould_compileT10971a renameshould_compilern039 renameshould_compilern064 renameshould_compileT1972 renameshould_failT2723 renameshould_compileT3262 driver/werror renameshould_failT22478d typecheckshould_failTyAppPat_ScopedTyVarConflict |
TcRnInvalidWarningCategory :: !WarningCategory -> TcRnMessage | TcRnInvalidWarningCategory is an error that occurs when a warning is declared with a category name that is not the special category "deprecations", and either does not begin with the prefix "x-" indicating a user-defined category, or contains characters not valid in category names. See Note [Warning categories] in GHC.Unit.Module.Warnings Examples(s): module M {-# WARNING in "invalid" Oops #-} where {-# WARNING in "x- spaces not allowed" foo Oops #-} Test cases: warningsshould_failWarningCategoryInvalid |
TcRnDuplicateWarningDecls :: !(LocatedN RdrName) -> !RdrName -> TcRnMessage | TcRnDuplicateWarningDecls is an error that occurs whenever a warning is declared twice. Examples(s): {-# DEPRECATED foo "Don't use me" #-} {-# DEPRECATED foo "Don't use me" #-} foo :: Int foo = 2 Test cases: renameshould_failrnfail058 |
TcRnSimplifierTooManyIterations | TcRnSimplifierTooManyIterations is an error that occurs whenever the constraint solver in the simplifier hits the iterations' limit. Examples(s): None. Test cases: None. |
Fields
| |
TcRnIllegalPatSynDecl :: !(LIdP GhcPs) -> TcRnMessage | TcRnIllegalPatSynDecl is an error that occurs whenever there is an illegal pattern synonym declaration. Examples(s): varWithLocalPatSyn x = case x of P -> () where pattern P = () -- not valid, it can't be local, it must be defined at top-level. Test cases: patsynshould_faillocal |
TcRnLinearPatSyn :: !Type -> TcRnMessage | TcRnLinearPatSyn is an error that occurs whenever a pattern synonym signature uses a field that is not unrestricted. Example(s): None Test cases: linearshould_failLinearPatSyn2 |
TcRnEmptyRecordUpdate :: TcRnMessage | TcRnEmptyRecordUpdate is an error that occurs whenever a record is updated without specifying any field. Examples(s): $(deriveJSON defaultOptions{} ''Bad) -- not ok, no fields selected for update of defaultOptions Test cases: th/T12788 |
TcRnIllegalFieldPunning :: !(Located RdrName) -> TcRnMessage | TcRnIllegalFieldPunning is an error that occurs whenever
field punning is used without the Examples(s): data Foo = Foo { a :: Int } foo :: Foo -> Int foo Foo{a} = a -- Not ok, punning used without extension. Test cases: parsershould_failRecordDotSyntaxFail12 |
TcRnIllegalWildcardsInRecord :: !RecordFieldPart -> TcRnMessage | TcRnIllegalWildcardsInRecord is an error that occurs whenever wildcards (..) are used in a record without the relevant extension being enabled. Examples(s): data Foo = Foo { a :: Int } foo :: Foo -> Int foo Foo{..} = a -- Not ok, wildcards used without extension. Test cases: parsershould_failRecordWildCardsFail |
TcRnIllegalWildcardInType | TcRnIllegalWildcardInType is an error that occurs when a wildcard appears in a type in a location in which wildcards aren't allowed. Examples: Type synonyms: type T = _ Class declarations and instances: class C _ instance C _ Standalone kind signatures: type D :: _ data D Test cases: ExtraConstraintsWildcardInTypeSplice2 ExtraConstraintsWildcardInTypeSpliceUsed ExtraConstraintsWildcardNotLast ExtraConstraintsWildcardTwice NestedExtraConstraintsWildcard NestedNamedExtraConstraintsWildcard PartialClassMethodSignature PartialClassMethodSignature2 T12039 T13324_fail1 UnnamedConstraintWildcard1 UnnamedConstraintWildcard2 WildcardInADT1 WildcardInADT2 WildcardInADT3 WildcardInADTContext1 WildcardInDefault WildcardInDefaultSignature WildcardInDeriving WildcardInForeignExport WildcardInForeignImport WildcardInGADT1 WildcardInGADT2 WildcardInInstanceHead WildcardInInstanceSig WildcardInNewtype WildcardInPatSynSig WildcardInStandaloneDeriving WildcardInTypeFamilyInstanceRHS WildcardInTypeSynonymRHS saks_fail003 T15433a |
Fields
| |
TcRnIllegalNamedWildcardInTypeArgument :: RdrName -> TcRnMessage | TcRnIllegalNamedWildcardInTypeArgument is an error that occurs when a named wildcard is used in a required type argument. Example: vfun :: forall (a :: k) -> () x = vfun _nwc -- ^^^^ -- named wildcards not allowed in type arguments Test cases: T23738_fail_wild |
TcRnIllegalImplicitTyVarInTypeArgument :: RdrName -> TcRnMessage | |
TcRnDuplicateFieldName :: !RecordFieldPart -> NonEmpty RdrName -> TcRnMessage | TcRnDuplicateFieldName is an error that occurs whenever there are duplicate field names in a single record. Examples(s): data R = MkR { x :: Int, x :: Bool } f r = r { x = 3, x = 4 } Test cases: T21959. |
TcRnIllegalViewPattern :: !(Pat GhcPs) -> TcRnMessage | TcRnIllegalViewPattern is an error that occurs whenever the ViewPatterns syntax is used but the ViewPatterns language extension is not enabled. Examples(s): data Foo = Foo { a :: Int } foo :: Foo -> Int
foo (a -> l) = l -- not OK, the Test cases: parsershould_failViewPatternsFail |
TcRnCharLiteralOutOfRange :: !Char -> TcRnMessage | TcRnCharLiteralOutOfRange is an error that occurs whenever a character is out of range. Examples(s): None Test cases: None |
TcRnNegativeNumTypeLiteral :: HsTyLit GhcPs -> TcRnMessage | TcRnNegativeNumTypeLiteral is an error that occurs whenever a type-level number literal is negative. type Neg = -1 Test cases: th/T8412 typecheckshould_failT8306 |
TcRnIllegalWildcardsInConstructor :: !Name -> TcRnMessage | TcRnIllegalWildcardsInConstructor is an error that occurs whenever the record wildcards '..' are used inside a constructor without labeled fields. Examples(s): None Test cases: renameshould_failT9815.hs renameshould_failT9815b.hs renameshould_failT9815ghci.hs renameshould_failT9815bghci.hs |
TcRnIgnoringAnnotations :: [LAnnDecl GhcRn] -> TcRnMessage | TcRnIgnoringAnnotations is a warning that occurs when the source code contains annotation pragmas but the platform in use does not support an external interpreter such as GHCi and therefore the annotations are ignored. Example(s): None Test cases: None |
TcRnAnnotationInSafeHaskell :: TcRnMessage | TcRnAnnotationInSafeHaskell is an error that occurs if annotation pragmas are used in conjunction with Safe Haskell. Example(s): None Test cases: annotationsshould_failT10826 |
TcRnInvalidTypeApplication :: Type -> LHsWcType GhcRn -> TcRnMessage | TcRnInvalidTypeApplication is an error that occurs when a visible type application is used with an expression that does not accept "specified" type arguments. Example(s): foo :: forall {a}. a -> a foo x = x bar :: () bar = let x = foo @Int 42 in () Test cases: overloadedrecfldsshould_failoverloadedlabelsfail03 typecheckshould_failExplicitSpecificity1 typecheckshould_failExplicitSpecificity10 typecheckshould_failExplicitSpecificity2 typecheckshould_failT17173 typecheckshould_failVtaFail |
TcRnTagToEnumMissingValArg :: TcRnMessage | TcRnTagToEnumMissingValArg is an error that occurs when the 'tagToEnum#' function is not applied to a single value argument. Example(s): tagToEnum# 1 2 Test cases: None |
TcRnTagToEnumUnspecifiedResTy :: Type -> TcRnMessage | TcRnTagToEnumUnspecifiedResTy is an error that occurs when the 'tagToEnum#' function is not given a concrete result type. Example(s): foo :: forall a. a foo = tagToEnum# 0# Test cases: typecheckshould_failtcfail164 |
TcRnTagToEnumResTyNotAnEnum :: Type -> TcRnMessage | TcRnTagToEnumResTyNotAnEnum is an error that occurs when the 'tagToEnum#' function is given a result type that is not an enumeration type. Example(s): foo :: Int -- not an enumeration TyCon foo = tagToEnum# 0# Test cases: typecheckshould_failtcfail164 |
TcRnTagToEnumResTyTypeData :: Type -> TcRnMessage | TcRnTagToEnumResTyTypeData is an error that occurs when the 'tagToEnum#'
function is given a result type that is headed by a Example(s): type data Letter = A | B | C foo :: Letter foo = tagToEnum# 0# Test cases: type-datashould_failTDTagToEnum.hs |
TcRnArrowIfThenElsePredDependsOnResultTy :: TcRnMessage | TcRnArrowIfThenElsePredDependsOnResultTy is an error that occurs when the predicate type of an ifThenElse expression in arrow notation depends on the type of the result. Example(s): None Test cases: None |
TcRnIllegalHsBootOrSigDecl :: !HsBootOrSig -> !BadBootDecls -> TcRnMessage | TcRnIllegalHsBootOrSigDecl is an error that occurs when an hs-boot file contains declarations that are not allowed, such as bindings. Examples:
Test cases:
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TcRnBootMismatch :: !HsBootOrSig -> !BootMismatch -> TcRnMessage | TcRnBootMismatch is a family of errors that occur when there is a mismatch between the hs-boot and hs files. Examples:
data D = MkD Int Test cases:
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TcRnRecursivePatternSynonym :: LHsBinds GhcRn -> TcRnMessage | TcRnRecursivePatternSynonym is an error that occurs when a pattern synonym is defined in terms of itself, either directly or indirectly. Example(s): pattern A = B pattern B = A Test cases: patsynshould_failT16900 |
TcRnPartialTypeSigTyVarMismatch | TcRnPartialTypeSigTyVarMismatch is an error that occurs when a partial type signature attempts to unify two different types. Example(s): f :: a -> b -> _ f x y = [x, y] Test cases: partial-sigsshould_failT14449 |
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TcRnPartialTypeSigBadQuantifier | TcRnPartialTypeSigBadQuantifier is an error that occurs when a type variable being quantified over in the partial type signature of a function gets unified with a type that is free in that function's context. Example(s): foo :: Num a => a -> a foo xxx = g xxx where g :: forall b. Num b => _ -> b g y = xxx + y Test cases: partial-sigshould_failT14479 |
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TcRnMissingSignature :: MissingSignature -> Exported -> TcRnMessage | TcRnMissingSignature is a warning that occurs when a top-level binding or a pattern synonym does not have a type signature. Controlled by the flags: -Wmissing-signatures -Wmissing-exported-signatures -Wmissing-pattern-synonym-signatures -Wmissing-exported-pattern-synonym-signatures -Wmissing-kind-signatures -Wmissing-poly-kind-signatures Test cases: T11077 (top-level bindings) T12484 (pattern synonyms) T19564 (kind signatures) |
TcRnPolymorphicBinderMissingSig :: Name -> Type -> TcRnMessage | TcRnPolymorphicBinderMissingSig is a warning controlled by -Wmissing-local-signatures that occurs when a local polymorphic binding lacks a type signature. Example(s): id a = a Test cases: warningsshould_compileT12574 |
TcRnOverloadedSig :: TcIdSig -> TcRnMessage | TcRnOverloadedSig is an error that occurs when a binding group conflicts with the monomorphism restriction. Example(s): data T a = T a mono = ... where x :: Applicative f => f a T x = ... Test cases: typecheckshould_compileT11339 |
TcRnTupleConstraintInst :: !Class -> TcRnMessage | TcRnTupleConstraintInst is an error that occurs whenever an instance for a tuple constraint is specified. Examples(s): class C m a class D m a f :: (forall a. Eq a => (C m a, D m a)) => m a f = undefined Test cases: quantified-constraints/T15334 |
TcRnUserTypeError :: !Type -> TcRnMessage | TcRnUserTypeError is an error that occurs due to a user's custom type error,
which can be triggered by adding a Examples(s): f :: TypeError (Text "This is a type error") f = undefined Test cases: typecheckshould_failCustomTypeErrors02 typecheckshould_failCustomTypeErrors03 |
TcRnConstraintInKind :: !Type -> TcRnMessage | TcRnConstraintInKind is an error that occurs whenever a constraint is specified in a kind. Examples(s): data Q :: Eq a => Type where {} Test cases: dependentshould_failT13895 polykinds/T16263 saksshould_failsaks_fail004 typecheckshould_failT16059a typecheckshould_failT18714 |
TcRnUnboxedTupleOrSumTypeFuncArg | TcRnUnboxedTupleTypeFuncArg is an error that occurs whenever an unboxed tuple or unboxed sum type is specified as a function argument, when the appropriate extension (`-XUnboxedTuples` or `-XUnboxedSums`) isn't enabled. Examples(s): -- T15073.hs import T15073a newtype Foo a = MkFoo a deriving P
Test cases: derivingshould_failT15073.hs derivingshould_failT15073a.hs typecheckshould_failT16059d |
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TcRnLinearFuncInKind :: !Type -> TcRnMessage | TcRnLinearFuncInKind is an error that occurs whenever a linear function is specified in a kind. Examples(s): data A :: * %1 -> * Test cases: linearshould_failLinearKind linearshould_failLinearKind2 linearshould_failLinearKind3 |
TcRnForAllEscapeError :: !Type -> !Kind -> TcRnMessage | TcRnForAllEscapeError is an error that occurs whenever a quantified type's kind mentions quantified type variable. Examples(s): type T :: TYPE (BoxedRep l) data T = MkT Test cases: unlifted-datatypesshould_failUnlDataNullaryPoly |
TcRnVDQInTermType :: !(Maybe Type) -> TcRnMessage | TcRnVDQInTermType is an error that occurs whenever a visible dependent quantification is specified in the type of a term. Examples(s): a = (undefined :: forall k -> k -> Type) @Int Test cases: dependentshould_failT15859 dependentshould_failT16326_Fail1 dependentshould_failT16326_Fail2 dependentshould_failT16326_Fail3 dependentshould_failT16326_Fail4 dependentshould_failT16326_Fail5 dependentshould_failT16326_Fail6 dependentshould_failT16326_Fail7 dependentshould_failT16326_Fail8 dependentshould_failT16326_Fail9 dependentshould_failT16326_Fail10 dependentshould_failT16326_Fail11 dependentshould_failT16326_Fail12 dependentshould_failT17687 dependentshould_failT18271 |
TcRnBadQuantPredHead :: !Type -> TcRnMessage | TcRnBadQuantPredHead is an error that occurs whenever a quantified predicate lacks a class or type variable head. Examples(s): class (forall a. A t a => A t [a]) => B t where type A t a :: Constraint Test cases: quantified-constraints/T16474 |
TcRnIllegalTupleConstraint :: !Type -> TcRnMessage | TcRnIllegalTupleConstraint is an error that occurs whenever an illegal tuple constraint is specified. Examples(s): g :: ((Show a, Num a), Eq a) => a -> a g = undefined Test cases: typecheckshould_failtcfail209a |
TcRnNonTypeVarArgInConstraint :: !Type -> TcRnMessage | TcRnNonTypeVarArgInConstraint is an error that occurs whenever a non type-variable argument is specified in a constraint. Examples(s): data T instance Eq Int => Eq T Test cases: ghciscriptsT13202 ghciscriptsT13202a polykinds/T12055a typecheckshould_failT10351 typecheckshould_failT19187 typecheckshould_failT6022 typecheckshould_failT8883 |
TcRnIllegalImplicitParam :: !Type -> TcRnMessage | TcRnIllegalImplicitParam is an error that occurs whenever an illegal implicit parameter is specified. Examples(s): type Bla = ?x::Int data T = T instance Bla => Eq T Test cases: polykinds/T11466 typecheckshould_failT8912 typecheckshould_failtcfail041 typecheckshould_failtcfail211 typecheckshould_failtcrun045 |
TcRnIllegalConstraintSynonymOfKind :: !Type -> TcRnMessage | TcRnIllegalConstraintSynonymOfKind is an error that occurs whenever an illegal constraint synonym of kind is specified. Examples(s): type Showish = Show f :: (Showish a) => a -> a f = undefined Test cases: typecheckshould_failtcfail209 |
TcRnOversaturatedVisibleKindArg :: !Type -> TcRnMessage | TcRnOversaturatedVisibleKindArg is an error that occurs whenever an illegal oversaturated visible kind argument is specified. Examples(s): type family F2 :: forall (a :: Type). Type where F2 @a = Maybe a Test cases: typecheckshould_failT15793 typecheckshould_failT16255 |
TcRnForAllRankErr :: !Rank -> !Type -> TcRnMessage | TcRnForAllRankErr is an error that occurs whenever an illegal ranked type is specified. Examples(s): foo :: (a,b) -> (a~b => t) -> (a,b) foo p x = p Test cases: - ghcishould_runT15806 - indexed-typesshould_failSimpleFail15 - typecheckshould_failT11355 - typecheckshould_failT12083a - typecheckshould_failT12083b - typecheckshould_failT16059c - typecheckshould_failT16059e - typecheckshould_failT17213 - typecheckshould_failT18939_Fail - typecheckshould_failT2538 - typecheckshould_failT5957 - typecheckshould_failT7019 - typecheckshould_failT7019a - typecheckshould_failT7809 - typecheckshould_failT9196 - typecheckshould_failtcfail127 - typecheckshould_failtcfail184 - typecheckshould_failtcfail196 - typecheckshould_failtcfail197 |
TcRnSimplifiableConstraint :: !PredType -> !InstanceWhat -> TcRnMessage | TcRnSimplifiableConstraint is a warning triggered by the occurrence of a simplifiable constraint in a context, when MonoLocalBinds is not enabled. Examples(s): simplifiableEq :: Eq (a, a) => a -> a -> Bool simplifiableEq = undefined Test cases: - indexed-typesshould_compileT15322 - partial-sigsshould_compileSomethingShowable - typecheckshould_compileT13526 |
TcRnArityMismatch | TcRnArityMismatch is an error that occurs when a type constructor is supplied with fewer arguments than required. Examples(s): f Left = undefined Test cases: - backpackshould_failbkpfail25.bkp - ghcishould_failT16013 - ghcishould_failT16287 - indexed-typesshould_failBadSock - indexed-typesshould_failT9433 - module/mod60 - ndexed-typesshould_failT2157 - parsershould_failParserNoBinaryLiterals2 - parsershould_failParserNoBinaryLiterals3 - patsynshould_failT12819 - polykinds/T10516 - typecheckshould_failT12124 - typecheckshould_failT15954 - typecheckshould_failT16874 - typecheckshould_failtcfail100 - typecheckshould_failtcfail101 - typecheckshould_failtcfail107 - typecheckshould_failtcfail129 - typecheckshould_failtcfail187 |
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TcRnIllegalInstance :: IllegalInstanceReason -> TcRnMessage | TcRnIllegalClassInstance is a collection of diagnostics that arise from an invalid class or family instance declaration. |
TcRnMonomorphicBindings :: [Name] -> TcRnMessage | TcRnMonomorphicBindings is a warning (controlled by -Wmonomorphism-restriction) that arises when the monomorphism restriction applies to the given bindings. Examples(s): {-# OPTIONS_GHC -Wmonomorphism-restriction #-} bar = 10 foo :: Int foo = bar main :: IO () main = print foo The example above emits the warning (for Test cases: typecheckshould_compileT13785 |
TcRnOrphanInstance :: Either ClsInst FamInst -> TcRnMessage | TcRnOrphanInstance is a warning (controlled by -Worphans) that arises when a typeclass instance or family instance is an "orphan", i.e. if it appears in a module in which neither the class/family nor the type being instanced are declared in the same module. Examples(s): None Test cases: warningsshould_compileT9178 typecheckshould_compileT4912 |
TcRnFunDepConflict :: !UnitState -> NonEmpty ClsInst -> TcRnMessage | TcRnFunDepConflict is an error that occurs when there are functional dependencies conflicts between instance declarations. Examples(s): None Test cases: typecheckshould_failT2307 typecheckshould_failtcfail096 typecheckshould_failtcfail202 |
TcRnDupInstanceDecls :: !UnitState -> NonEmpty ClsInst -> TcRnMessage | TcRnDupInstanceDecls is an error that occurs when there are duplicate instance declarations. Examples(s): class Foo a where foo :: a -> Int instance Foo Int where foo = id instance Foo Int where foo = const 42 Test cases: cabalT12733T12733 typecheckshould_failtcfail035 typecheckshould_failtcfail023 backpackshould_failbkpfail18 typecheckshould_failTcNullaryTCFail typecheckshould_failtcfail036 typecheckshould_failtcfail073 module/mod51 module/mod52 module/mod44 |
TcRnConflictingFamInstDecls :: NonEmpty FamInst -> TcRnMessage | TcRnConflictingFamInstDecls is an error that occurs when there are conflicting family instance declarations. Examples(s): None. Test cases: indexed-typesshould_failExplicitForAllFams4b indexed-typesshould_failNoGood indexed-typesshould_failOver indexed-typesshould_failOverDirectThisMod indexed-typesshould_failOverIndirectThisMod indexed-typesshould_failSimpleFail11a indexed-typesshould_failSimpleFail11b indexed-typesshould_failSimpleFail11c indexed-typesshould_failSimpleFail11d indexed-typesshould_failSimpleFail2a indexed-typesshould_failSimpleFail2b indexed-typesshould_failT13092/T13092 indexed-typesshould_failT13092c/T13092c indexed-typesshould_failT14179 indexed-typesshould_failT2334A indexed-typesshould_failT2677 indexed-typesshould_failT3330b indexed-typesshould_failT4246 indexed-typesshould_failT7102a indexed-typesshould_failT9371 polykinds/T7524 typecheckshould_failUnliftedNewtypesOverlap |
TcRnFamInstNotInjective | TcRnFamInstNotInjective is a collection of errors that arise from a type family equation violating the injectivity annotation. See |
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TcRnBangOnUnliftedType :: !Type -> TcRnMessage | TcRnBangOnUnliftedType is a warning (controlled by -Wredundant-strictness-flags) that occurs when a strictness annotation is applied to an unlifted type. Example(s): data T = MkT !Int# -- Strictness flag has no effect on unlifted types Test cases: typecheckshould_compileT20187a typecheckshould_compileT20187b |
TcRnLazyBangOnUnliftedType :: !Type -> TcRnMessage | TcRnLazyBangOnUnliftedType is a warning (controlled by -Wredundant-strictness-flags) that occurs when a lazy annotation is applied to an unlifted type. Example(s): data T = MkT ~Int# -- Lazy flag has no effect on unlifted types Test cases: typecheckshould_compileT21951a typecheckshould_compileT21951b |
TcRnMultipleDefaultDeclarations :: [LDefaultDecl GhcRn] -> TcRnMessage | TcRnMultipleDefaultDeclarations is an error that occurs when a module has more than one default declaration. Example: default (Integer, Int) default (Double, Float) -- 2nd default declaration not allowed Text cases: module/mod58 |
TcRnBadDefaultType :: Type -> [Class] -> TcRnMessage | TcRnBadDefaultType is an error that occurs when a type used in a default declaration does not have an instance for any of the applicable classes. Example(s): data Foo default (Foo) Test cases: typecheckshould_failT11974b |
TcRnPatSynBundledWithNonDataCon :: TcRnMessage | TcRnPatSynBundledWithNonDataCon is an error that occurs when a module's export list bundles a pattern synonym with a type that is not a proper `data` or `newtype` construction. Example(s): module Foo (MyClass(.., P)) where pattern P = Nothing class MyClass a where foo :: a -> Int Test cases: patsynshould_failexport-class |
TcRnPatSynBundledWithWrongType :: Type -> Type -> TcRnMessage | TcRnPatSynBundledWithWrongType is an error that occurs when the export list of a module has a pattern synonym bundled with a type that does not match the type of the pattern synonym. Example(s): module Foo (R(P,x)) where data Q = Q Int data R = R pattern P{x} = Q x Text cases: patsynshould_failexport-ps-rec-sel patsynshould_failexport-type-synonym patsynshould_failexport-type |
TcRnDupeModuleExport :: ModuleName -> TcRnMessage | TcRnDupeModuleExport is a warning controlled by Example(s): module Foo (module Bar, module Bar) import Bar Text cases: None |
TcRnExportedModNotImported :: ModuleName -> TcRnMessage | TcRnExportedModNotImported is an error that occurs when an export list contains a module that is not imported. Example(s): None Text cases: module/mod135 module/mod8 renameshould_failrnfail028 backpackshould_failbkpfail48 |
TcRnNullExportedModule :: ModuleName -> TcRnMessage | TcRnNullExportedModule is a warning controlled by -Wdodgy-exports that occurs when an export list contains a module that has no exports. Example(s): module Foo (module Bar) where import Bar () Test cases: None |
TcRnMissingExportList :: ModuleName -> TcRnMessage | TcRnMissingExportList is a warning controlled by -Wmissing-export-lists that occurs when a module does not have an explicit export list. Example(s): None Test cases: typecheckshould_failMissingExportList03 |
TcRnExportHiddenComponents :: IE GhcPs -> TcRnMessage | TcRnExportHiddenComponents is an error that occurs when an export contains constructor or class methods that are not visible. Example(s): None Test cases: None |
TcRnDuplicateExport :: GlobalRdrElt -> IE GhcPs -> IE GhcPs -> TcRnMessage | TcRnDuplicateExport is a warning (controlled by -Wduplicate-exports) that occurs when an identifier appears in an export list more than once. Example(s): None Test cases: module/MultiExport module/mod128 module/mod14 module/mod5 overloadedrecfldsshould_failDuplicateExports patsynshould_compileT11959 |
TcRnExportedParentChildMismatch | TcRnExportedParentChildMismatch is an error that occurs when an export is bundled with a parent that it does not belong to Example(s): module Foo (T(a)) where data T a = True Test cases: module/T11970 module/T11970B module/mod17 module/mod3 overloadedrecfldsshould_failNoParent |
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TcRnConflictingExports | TcRnConflictingExports is an error that occurs when different identifiers that have the same name are being exported by a module. Example(s): module Foo (Bar.f, module Baz) where import qualified Bar (f) import Baz (f) Test cases: module/mod131 module/mod142 module/mod143 module/mod144 module/mod145 module/mod146 module/mod150 module/mod155 overloadedrecfldsshould_failT14953 overloadedrecfldsshould_failoverloadedrecfldsfail10 renameshould_failrnfail029 renameshould_failrnfail040 typecheckshould_failT16453E2 typecheckshould_failtcfail025 typecheckshould_failtcfail026 |
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TcRnDuplicateFieldExport :: (GlobalRdrElt, IE GhcPs) -> NonEmpty (GlobalRdrElt, IE GhcPs) -> TcRnMessage | TcRnDuplicateFieldExport is an error that occurs when a module exports multiple record fields with the same name, without enabling DuplicateRecordFields. Example: module M1 where data D1 = MkD1 { foo :: Int } module M2 where data D2 = MkD2 { foo :: Int } module M ( D1(..), D2(..) ) where import module M1 import module M2 Test case: overloadedrecfldsshould_failoverloadedrecfldsfail10 |
TcRnAmbiguousRecordUpdate | TcRnAmbiguousRecordUpdate is a warning, controlled by -Wambiguous-fields, which occurs when a user relies on the type-directed disambiguation mechanism to disambiguate a record update. This will not be supported by -XDuplicateRecordFields in future releases. Example(s): data Person = MkPerson { personId :: Int, name :: String } data Address = MkAddress { personId :: Int, address :: String } bad1 x = x { personId = 4 } :: Person -- ambiguous bad2 (x :: Person) = x { personId = 4 } -- ambiguous good x = (x :: Person) { personId = 4 } -- not ambiguous Test cases: overloadedrecfldsshould_failoverloadedrecfldsfail06 |
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TcRnMissingFields :: ConLike -> [(FieldLabelString, TcType)] -> TcRnMessage | TcRnMissingFields is a warning controlled by -Wmissing-fields occurring when the intialisation of a record is missing one or more (lazy) fields. Example(s):
data Rec = Rec { a :: Int, b :: String, c :: Bool }
x = Rec { a = 1, b = "two" } -- missing field Test cases: deSugarshould_compileT13870 deSugarshould_compileds041 patsynshould_compileT11283 renameshould_compileT5334 renameshould_compileT12229 renameshould_compileT5892a warningsshould_failWerrorFail2 |
TcRnFieldUpdateInvalidType :: [(FieldLabelString, TcType)] -> TcRnMessage | TcRnFieldUpdateInvalidType is an error occurring when an updated field's type mentions something that is outside the universally quantified variables of the data constructor, such as an existentially quantified type. Example(s): data X = forall a. MkX { f :: a } x = (MkX ()) { f = False } Test cases: patsynshould_failrecords-exquant typecheckshould_failT3323 |
TcRnMissingStrictFields :: ConLike -> [(FieldLabelString, TcType)] -> TcRnMessage | TcRnMissingStrictFields is an error occurring when a record field marked as strict is omitted when constructing said record. Example(s): data R = R { strictField :: !Bool, nonStrict :: Int } x = R { nonStrict = 1 } Test cases: typecheckshould_failT18869 typecheckshould_failtcfail085 typecheckshould_failtcfail112 |
TcRnAmbiguousFieldInUpdate :: (GlobalRdrElt, GlobalRdrElt, [GlobalRdrElt]) -> TcRnMessage | TcRnAmbiguousFieldInUpdate is an error that occurs when a field in a record update clashes with another field or top-level function of the same name, and the user hasn't enabled -XDisambiguateRecordFields. Example: {-# LANGUAGE NoFieldSelectors #-} {-# LANGUAGE NoDisambiguateRecordFields #-} module M where data A = MkA { fld :: Int } fld :: Bool fld = False f r = r { fld = 3 } |
TcRnBadRecordUpdate | TcRnBadRecordUpdate is an error when a regular (non-overloaded) record update cannot be pinned down to any one parent. The problem with the record update is stored in the Example(s): data R1 = R1 { x :: Int } data R2 = R2 { x :: Int } update r = r { x = 1 } -- ambiguous data R1 = R1 { x :: Int, y :: Int } data R2 = R2 { y :: Int, z :: Int } update r = r { x = 1, y = 2, z = 3 } -- no parent has all the fields Test cases: overloadedrecfldsshould_failoverloadedrecfldsfail01 overloadedrecfldsshould_failoverloadedrecfldsfail01 overloadedrecfldsshould_failoverloadedrecfldsfail14 |
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TcRnStaticFormNotClosed :: Name -> NotClosedReason -> TcRnMessage | TcRnStaticFormNotClosed is an error pertaining to terms that are marked static using the -XStaticPointers extension but which are not closed terms. Example(s): f x = static x Test cases: renameshould_failRnStaticPointersFail01 renameshould_failRnStaticPointersFail03 |
TcRnUselessTypeable :: TcRnMessage | TcRnUselessTypeable is a warning (controlled by -Wderiving-typeable) that
occurs when trying to derive an instance of the Example(s): None. Test cases: warningsshould_compileDerivingTypeable |
TcRnDerivingDefaults :: !Class -> TcRnMessage | TcRnDerivingDefaults is a warning (controlled by -Wderiving-defaults) that
occurs when both Example(s): None. Test cases: typecheckshould_compileT15839a derivingshould_compileT16179 |
TcRnNonUnaryTypeclassConstraint :: !(LHsSigType GhcRn) -> TcRnMessage | TcRnNonUnaryTypeclassConstraint is an error that occurs when GHC encounters a non-unary constraint when trying to derive a typeclass. Example(s): class A deriving instance A data B deriving A -- We cannot derive A, is not unary (i.e. 'class A a'). Test cases: derivingshould_failT7959 derivingshould_faildrvfail005 derivingshould_faildrvfail009 derivingshould_faildrvfail006 |
TcRnPartialTypeSignatures :: !SuggestPartialTypeSignatures -> !ThetaType -> TcRnMessage | TcRnPartialTypeSignatures is a warning (controlled by -Wpartial-type-signatures) that occurs when a wildcard '_' is found in place of a type in a signature or a type class derivation Example(s): foo :: _ -> Int foo = ... deriving instance _ => Eq (Foo a) Test cases: dependentshould_compileT11241 dependentshould_compileT15076 dependentshould_compileT14880-2 typecheckshould_compileT17024 typecheckshould_compileT10072 partial-sigsshould_failTidyClash2 partial-sigsshould_failDefaulting1MROff partial-sigsshould_failWildcardsInPatternAndExprSig partial-sigsshould_failT10615 partial-sigsshould_failT14584a partial-sigsshould_failTidyClash partial-sigsshould_failT11122 partial-sigsshould_failT14584 partial-sigsshould_failT10045 partial-sigsshould_failPartialTypeSignaturesDisabled partial-sigsshould_failT10999 partial-sigsshould_failExtraConstraintsWildcardInExpressionSignature partial-sigsshould_failExtraConstraintsWildcardInPatternSplice partial-sigsshould_failWildcardInstantiations partial-sigsshould_runT15415 partial-sigsshould_compileT10463 partial-sigsshould_compileT15039a partial-sigsshould_compileT16728b partial-sigsshould_compileT15039c partial-sigsshould_compileT10438 partial-sigsshould_compileSplicesUsed partial-sigsshould_compileT18008 partial-sigsshould_compileExprSigLocal partial-sigsshould_compileT11339a partial-sigsshould_compileT11670 partial-sigsshould_compileWarningWildcardInstantiations partial-sigsshould_compileT16728 partial-sigsshould_compileT12033 partial-sigsshould_compileT15039b partial-sigsshould_compileT10403 partial-sigsshould_compileT11192 partial-sigsshould_compileT16728a partial-sigsshould_compileTypedSplice partial-sigsshould_compileT15039d partial-sigsshould_compileT11016 partial-sigsshould_compileT13324_compile2 linearshould_failLinearPartialSig polykinds/T14265 polykinds/T14172 |
TcRnCannotDeriveInstance | TcRnCannotDeriveInstance is an error that occurs every time a typeclass instance
can't be derived. The Example(s): None. Test cases: genericsT10604T10604_no_PolyKinds derivingshould_faildrvfail009 derivingshould_faildrvfail-functor2 derivingshould_failT10598_fail3 derivingshould_failderiving-via-fail2 derivingshould_failderiving-via-fail derivingshould_failT16181 |
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TcRnLazyGADTPattern :: TcRnMessage | TcRnLazyGADTPattern is an error that occurs when a user writes a nested GADT pattern match inside a lazy (~) pattern. Test case: gadt/lazypat |
TcRnArrowProcGADTPattern :: TcRnMessage | TcRnArrowProcGADTPattern is an error that occurs when a user writes a GADT pattern inside arrow proc notation. Test case: arrowsshould_failarrowfail004. |
TcRnCapturedTermName :: RdrName -> Either [GlobalRdrElt] Name -> TcRnMessage | TcRnCapturedTermName is a warning (controlled by -Wterm-variable-capture) that occurs when an implicitly quantified type variable's name is already used for a term. Example: a = 10 f :: a -> a Test cases: T22513a T22513b T22513c T22513d T22513e T22513f T22513g T22513h T22513i |
TcRnTypeEqualityOutOfScope :: TcRnMessage | TcRnTypeEqualityOutOfScope is a warning (controlled by -Wtype-equality-out-of-scope) that occurs when the type equality (a ~ b) is not in scope. Test case: warningsshould_compileT18862b |
TcRnTypeEqualityRequiresOperators :: TcRnMessage | TcRnTypeEqualityRequiresOperators is a warning (controlled by -Wtype-equality-requires-operators) that occurs when the type equality (a ~ b) is used without the TypeOperators extension. Example: {-# LANGUAGE NoTypeOperators #-} f :: (a ~ b) => a -> b Test case: T18862a |
TcRnIllegalTypeOperator :: !SDoc -> !RdrName -> TcRnMessage | TcRnIllegalTypeOperator is an error that occurs when a type operator is used without the TypeOperators extension. Example: {-# LANGUAGE NoTypeOperators #-} f :: Vec a n -> Vec a m -> Vec a (n + m) Test case: T12811 |
TcRnIllegalTypeOperatorDecl :: !RdrName -> TcRnMessage | TcRnIllegalTypeOperatorDecl is an error that occurs when a type or class operator is declared without the TypeOperators extension. See Note [Type and class operator definitions] Example: {-# LANGUAGE Haskell2010 #-} {-# LANGUAGE MultiParamTypeClasses #-} module T3265 where data a :+: b = Left a | Right b class a :*: b where {} Test cases: T3265, tcfail173 |
TcRnGADTMonoLocalBinds :: TcRnMessage | TcRnGADTMonoLocalBinds is a warning controlled by -Wgadt-mono-local-binds that occurs when pattern matching on a GADT when -XMonoLocalBinds is off. Example(s): None Test cases: T20485, T20485a |
TcRnNotInScope | The TcRnNotInScope constructor is used for various not-in-scope errors.
See |
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TcRnTermNameInType :: RdrName -> [GhcHint] -> TcRnMessage | TcRnTermNameInType is an error that occurs when a term-level identifier is used in a type. Example: import qualified Prelude bad :: Prelude.fst (Bool, Float) bad = False Test cases: T21605{c,d} |
TcRnUntickedPromotedThing :: UntickedPromotedThing -> TcRnMessage | TcRnUntickedPromotedThing is a warning (controlled with -Wunticked-promoted-constructors) that is triggered by an unticked occurrence of a promoted data constructor. Examples: data A = MkA type family F (a :: A) where { F MkA = Bool } type B = [ Int, Bool ] Test cases: T9778, T19984. |
TcRnIllegalBuiltinSyntax | TcRnIllegalBuiltinSyntax is an error that occurs when built-in syntax appears in an unexpected location, e.g. as a data constructor or in a fixity declaration. Examples: infixl 5 : data P = (,) Test cases: rnfail042, T14907b, T15124, T15233. |
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TcRnWarnDefaulting | TcRnWarnDefaulting is a warning (controlled by -Wtype-defaults) that is triggered whenever a Wanted typeclass constraint is solving through the defaulting of a type variable. Example: one = show 1 -- We get Wanteds Show a0, Num a0, and default a0 to Integer. Test cases: none (which are really specific to defaulting), but see e.g. tcfail204. |
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TcRnIncorrectNameSpace | TcRnIncorrectNameSpace is an error that occurs when a Example: list2 = $( conE ''(:) Test cases: T20884. |
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TcRnForeignImportPrimExtNotSet :: ForeignImport GhcRn -> TcRnMessage | TcRnForeignImportPrimExtNotSet is an error occurring when a foreign import
is declared using the Example(s): foreign import prim "foo" foo :: ByteArray# -> (# Int#, Int# #) Test cases: ffishould_failT20116 |
TcRnForeignImportPrimSafeAnn :: ForeignImport GhcRn -> TcRnMessage | TcRnForeignImportPrimSafeAnn is an error declaring that the safe/unsafe
annotation should not be used with Example(s): foreign import prim unsafe "my_primop_cmm" :: ... Test cases: None |
TcRnForeignFunctionImportAsValue :: ForeignImport GhcRn -> TcRnMessage | TcRnForeignFunctionImportAsValue is an error explaining that foreign Example(s): foreign import capi "math.h value sqrt" f :: CInt -> CInt Test cases: ffishould_failcapi_value_function |
TcRnFunPtrImportWithoutAmpersand :: ForeignImport GhcRn -> TcRnMessage | TcRnFunPtrImportWithoutAmpersand is a warning controlled by Example(s): foreign import ccall "f" f :: FunPtr (Int -> IO ()) Test cases: ffishould_compileT1357 |
TcRnIllegalForeignDeclBackend :: Either (ForeignExport GhcRn) (ForeignImport GhcRn) -> Backend -> ExpectedBackends -> TcRnMessage | TcRnIllegalForeignDeclBackend is an error occurring when a foreign import declaration is not compatible with the code generation backend being used. Example(s): None Test cases: None |
TcRnUnsupportedCallConv :: Either (ForeignExport GhcRn) (ForeignImport GhcRn) -> UnsupportedCallConvention -> TcRnMessage | TcRnUnsupportedCallConv informs the user that the calling convention specified
for a foreign export declaration is not compatible with the target platform.
It is a warning controlled by Example(s): None Test cases: None |
TcRnIllegalForeignType :: !(Maybe ArgOrResult) -> !IllegalForeignTypeReason -> TcRnMessage | TcRnIllegalForeignType is an error for when a type appears in a foreign function signature that is not compatible with the FFI. Example(s): None Test cases: ffishould_failT3066 ffishould_failccfail004 ffishould_failT10461 ffishould_failT7506 ffishould_failT5664 safeHaskellghcip6 safeHaskellsafeLanguageSafeLang08 ffishould_failT16702 linearshould_failLinearFFI ffishould_failT7243 |
TcRnInvalidCIdentifier :: !CLabelString -> TcRnMessage | TcRnInvalidCIdentifier indicates a C identifier that is not valid. Example(s): foreign import prim safe "not valid" cmm_test2 :: Int# -> Int# Test cases: th/T10638 |
TcRnExpectedValueId :: !TcTyThing -> TcRnMessage | TcRnExpectedValueId is an error occurring when something that is not a value identifier is used where one is expected. Example(s): none Test cases: none |
TcRnRecSelectorEscapedTyVar :: !OccName -> TcRnMessage | TcRnRecSelectorEscapedTyVar is an error indicating that a record field selector containing an existential type variable is used as a function rather than in a pattern match. Example(s): data Rec = forall a. Rec { field :: a } field (Rec True) Test cases: patsynshould_failrecords-exquant typecheckshould_failT3176 |
TcRnPatSynNotBidirectional :: !Name -> TcRnMessage | TcRnPatSynNotBidirectional is an error for when a non-bidirectional pattern synonym is used as a constructor. Example(s): pattern Five :: Int pattern Five <- 5 five = Five Test cases: patsynshould_failrecords-no-uni-update patsynshould_failrecords-no-uni-update2 |
TcRnIllegalDerivingItem :: !(LHsSigType GhcRn) -> TcRnMessage | TcRnIllegalDerivingItem is an error for when something other than a type class appears in a deriving statement. Example(s): data X = X deriving Int Test cases: derivingshould_failT5922 |
TcRnUnexpectedAnnotation :: !(HsType GhcRn) -> !HsSrcBang -> TcRnMessage | TcRnUnexpectedAnnotation indicates the erroroneous use of an annotation such as strictness, laziness, or unpacking. Example(s): data T = T { t :: Maybe {-# UNPACK #-} Int } data C = C { f :: !IntMap Int } Test cases: parsershould_failunpack_inside_type typecheckshould_failT7210 renameshould_failT22478b |
TcRnIllegalRecordSyntax :: Either (HsType GhcPs) (HsType GhcRn) -> TcRnMessage | TcRnIllegalRecordSyntax is an error indicating an illegal use of record syntax. Example(s): data T = T Int { field :: Int } Test cases: renameshould_failT7943 renameshould_failT9077 renameshould_failT22478b |
TcRnInvalidVisibleKindArgument | TcRnInvalidVisibleKindArgument is an error for a kind application on a target type that cannot accept it. Example(s):
bad :: Int Test cases: indexed-typesshould_failT16356_Fail3 typecheckshould_failExplicitSpecificity7 typecheckshould_failT12045b typecheckshould_failT12045c typecheckshould_failT15592a typecheckshould_failT15816 |
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TcRnTooManyBinders :: !Kind -> ![LHsTyVarBndr (HsBndrVis GhcRn) GhcRn] -> TcRnMessage | TcRnTooManyBinders is an error for a type constructor that is declared with more arguments then its kind specifies. Example(s): type T :: Type -> (Type -> Type) -> Type data T a (b :: Type -> Type) x1 (x2 :: Type -> Type) Test cases: saksshould_failsaks_fail008 |
TcRnDifferentNamesForTyVar :: !Name -> !Name -> TcRnMessage | TcRnDifferentNamesForTyVar is an error that indicates different names being used for the same type variable. Example(s): data SameKind :: k -> k -> * data Q (a :: k1) (b :: k2) c = MkQ (SameKind a b) Test cases: polykinds/T11203 polykinds/T11821a saksshould_failT20916 typecheckshould_failT17566b typecheckshould_failT17566c |
TcRnDisconnectedTyVar :: !Name -> TcRnMessage | TcRnDisconnectedTyVar is an error for a data declaration that has a kind signature, where the implicitly-bound type type variables can't be matched up unambiguously with the ones from the signature. See Note [Disconnected type variables] in GHC.Tc.Gen.HsType. Test cases: T24083 |
TcRnInvalidReturnKind | TcRnInvalidReturnKind is an error for a data declaration that has a kind signature with an invalid result kind. Example(s): data family Foo :: Constraint Test cases: typecheckshould_failT14048b typecheckshould_failUnliftedNewtypesConstraintFamily typecheckshould_failT12729 typecheckshould_failT15883 typecheckshould_failT16829a typecheckshould_failT16829b typecheckshould_failUnliftedNewtypesNotEnabled typecheckshould_failtcfail079 |
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TcRnUnexpectedKindVar :: RdrName -> TcRnMessage | TcRnUnexpectedKindVar is an error that occurs when the user tries to use kind variables without -XPolyKinds. Example: f :: forall k a. Proxy (a :: k) Test cases: polykinds/BadKindVar polykinds/T14710 saksshould_failT16722 |
TcRnIllegalKind | TcRnIllegalKind is used for a various illegal kinds errors including Example: type T :: forall k. Type -- without emabled -XPolyKinds Test cases: polykinds/T16762b |
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TcRnClassKindNotConstraint :: !Kind -> TcRnMessage | TcRnClassKindNotConstraint is an error for a type class that has a kind that is not equivalent to Constraint. Example(s): type C :: Type -> Type class C a Test cases: saksshould_failT16826 |
TcRnUnpromotableThing :: !Name -> !PromotionErr -> TcRnMessage | TcRnUnpromotableThing is an error that occurs when the user attempts to use the promoted version of something which is not promotable. Example(s): data T :: T -> * data X a where MkX :: Show a => a -> X a foo :: Proxy ('MkX 'True) foo = Proxy Test cases: dependentshould_failPromotedClass dependentshould_failT14845_fail1 dependentshould_failT14845_fail2 dependentshould_failT15215 dependentshould_failT13780c dependentshould_failT15245 polykinds/T5716 polykinds/T5716a polykinds/T6129 polykinds/T7433 patsynshould_failT11265 patsynshould_failT9161-1 patsynshould_failT9161-2 dependentshould_failSelfDep polykinds/PolyKinds06 polykinds/PolyKinds07 polykinds/T13625 polykinds/T15116 polykinds/T15116a saksshould_failT16727a saksshould_failT16727b renameshould_failT12686 renameshould_failT16635a renameshould_failT16635b renameshould_failT16635c |
TcRnIllegalTermLevelUse :: !Name -> !TermLevelUseErr -> TcRnMessage | TcRnIllegalTermLevelUse is an error that occurs when the user attempts to use a type-level entity at the term-level. Examples: f x = Int -- illegal use of a type constructor g (Proxy :: Proxy a) = a -- illegal use of a type variable Note that the namespace cannot be used to determine if a name refers to a type-level entity: {-# LANGUAGE RequiredTypeArguments #-} bad :: forall (a :: k) -> k bad t = t The name Test cases: T18740a, T18740b, T23739_fail_ret, T23739_fail_case |
TcRnMatchesHaveDiffNumArgs | TcRnMatchesHaveDiffNumArgs is an error occurring when something has matches that have different numbers of arguments Example(s): foo x = True foo x y = False Test cases: renameshould_failrnfail045 typecheckshould_failT20768_fail |
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TcRnUnexpectedPatSigType :: HsPatSigType GhcPs -> TcRnMessage | TcRnUnexpectedPatSigType is an error occurring when there is a type signature in a pattern without -XScopedTypeVariables extension Examples: f (a :: Bool) = ... Test case: renameshould_failT11663 |
TcRnIllegalKindSignature :: HsType GhcPs -> TcRnMessage | TcRnIllegalKindSignature is an error occurring when there is a kind signature without -XKindSignatures extension Examples: data Foo (a :: Nat) = .... Test case: parsershould_failreadFail036 |
TcRnDataKindsError :: TypeOrKind -> Either (HsType GhcPs) Type -> TcRnMessage | TcRnDataKindsError is an error occurring when there is an illegal type or kind, probably required -XDataKinds and is used without the enabled extension. This error can occur in both the renamer and the typechecker. The field
of type Examples: type Foo = [Nat, Char] type Bar = [Int, String] Test cases: linearshould_failT18888 parsershould_failreadFail001 polykinds/T7151 polykinds/T7433 renameshould_failT13568 renameshould_failT22478e th/TH_Promoted1Tuple typecheckshould_compiletcfail094 typecheckshould_compileT22141a typecheckshould_compileT22141b typecheckshould_compileT22141c typecheckshould_compileT22141d typecheckshould_compileT22141e typecheckshould_compileT22141f typecheckshould_compileT22141g typecheckshould_failT20873c typecheckshould_failT20873d |
TcRnCannotBindScopedTyVarInPatSig :: !(NonEmpty (Name, TcTyVar)) -> TcRnMessage | TcRnCannotBindScopedTyVarInPatSig is an error stating that scoped type variables cannot be used in pattern bindings. Example(s): let (x :: a) = 5 Test cases: typecheckshould_compiletc141 |
TcRnCannotBindTyVarsInPatBind :: !(NonEmpty (Name, TcTyVar)) -> TcRnMessage | TcRnCannotBindTyVarsInPatBind is an error for when type variables are introduced in a pattern binding Example(s): Just @a x = Just True Test cases: typecheckshould_failTyAppPat_PatternBinding typecheckshould_failTyAppPat_PatternBindingExistential |
TcRnTooManyTyArgsInConPattern | TcRnTooManyTyArgsInConPattern is an error occurring when a constructor pattern has more than the expected number of type arguments Example(s):
f (Just Test cases: typecheckshould_failTyAppPat_TooMany typecheckshould_failT20443b |
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TcRnMultipleInlinePragmas | TcRnMultipleInlinePragmas is a warning signifying that multiple inline pragmas reference the same definition. Example(s): {-# INLINE foo #-} {-# INLINE foo #-} foo :: Bool -> Bool foo = id Test cases: none |
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TcRnUnexpectedPragmas :: !Id -> !(NonEmpty (LSig GhcRn)) -> TcRnMessage | TcRnUnexpectedPragmas is a warning that occurs when unexpected pragmas appear in the source. Example(s): Test cases: none |
TcRnNonOverloadedSpecialisePragma :: !(LIdP GhcRn) -> TcRnMessage | TcRnNonOverloadedSpecialisePragma is a warning for a specialise pragma being placed on a definition that is not overloaded. Example(s): {-# SPECIALISE foo :: Bool -> Bool #-} foo :: Bool -> Bool foo = id Test cases: simplCoreshould_compileT8537 typecheckshould_compileT10504 |
TcRnSpecialiseNotVisible :: !Name -> TcRnMessage | TcRnSpecialiseNotVisible is a warning that occurs when the subject of a SPECIALISE pragma has a definition that is not visible from the current module. Example(s): none Test cases: none |
TcRnPragmaWarning | TcRnPragmaWarning is a warning that can happen when usage of something is warned or deprecated by pragma. Test cases: DeprU T5281 T5867 rn050 rn066 (here is a warning, not deprecation) T3303 ExportWarnings1 ExportWarnings2 ExportWarnings3 ExportWarnings4 ExportWarnings5 ExportWarnings6 InstanceWarnings |
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TcRnDifferentExportWarnings | TcRnDifferentExportWarnings is an error that occurs when the warning messages for exports of a name differ between several export items. Test case: DifferentExportWarnings |
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TcRnIncompleteExportWarnings | TcRnIncompleteExportWarnings is a warning (controlled by -Wincomplete-export-warnings) that occurs when some of the exports of a name do not have an export warning and some do Test case: ExportWarnings6 |
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TcRnIllegalHsigDefaultMethods | TcRnIllegalHsigDefaultMethods is an error that occurs when a binding for a class default method is provided in a Backpack signature file. Test case: bkpfail40 |
TcRnHsigFixityMismatch | TcRnHsigFixityMismatch is an error indicating that the fixity decl in a Backpack signature file differs from the one in the source file for the same operator. Test cases: bkpfail37, bkpfail38 |
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TcRnHsigShapeMismatch :: !HsigShapeMismatchReason -> TcRnMessage | TcRnHsigShapeMismatch is a group of errors related to mismatches between backpack signatures. |
TcRnHsigMissingModuleExport | TcRnHsigMissingModuleExport is an error indicating that a module doesn't export a name exported by its signature. Test cases: bkpfail01, bkpfail05, bkpfail09, bkpfail16, bkpfail35, bkpcabal06 |
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TcRnBadGenericMethod | TcRnBadGenericMethod This test ensures that if you provide a "more specific" type signatures for the default method, you must also provide a binding. Example: {-# LANGUAGE DefaultSignatures #-} class C a where meth :: a default meth :: Num a => a meth = 0 Test case: typecheckshould_failMissingDefaultMethodBinding.hs |
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TcRnWarningMinimalDefIncomplete :: ClassMinimalDef -> TcRnMessage | TcRnWarningMinimalDefIncomplete is a warning that one must specify which methods must be implemented by all instances. Example: class Cheater a where -- WARNING LINE cheater :: a {-# MINIMAL #-} -- warning! Test case: warningsminimalWarnMinimal.hs: |
TcRnIllegalQuasiQuotes :: TcRnMessage | TcRnIllegalQuasiQuotes is an error that occurs when a quasi-quote is used without the QuasiQuotes extension. Example: foo = [myQuoter|x y z|] Test cases: none; the parser fails to parse this if QuasiQuotes is off. |
TcRnTHError :: THError -> TcRnMessage | TcRnTHError is a family of errors involving Template Haskell.
See |
TcRnDefaultMethodForPragmaLacksBinding | TcRnDefaultMethodForPragmaLacksBinding is an error that occurs when a default method pragma is missing an accompanying binding. Test cases: typecheckshould_failT5084.hs typecheckshould_failT2354.hs |
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TcRnIgnoreSpecialisePragmaOnDefMethod :: !Name -> TcRnMessage | TcRnIgnoreSpecialisePragmaOnDefMethod is a warning that occurs when a specialise pragma is put on a default method. Test cases: none |
TcRnBadMethodErr | TcRnBadMethodErr is an error that happens when one attempts to provide a method in a class instance, when the class doesn't have a method by that name. Test case: th/T12387 |
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TcRnIllegalNewtype | TcRnIllegalNewtype is an error that occurs when a newtype:
Test cases: gadt/T14719 indexed-typesshould_failT14033 indexed-typesshould_failT2334A linearshould_failLinearGADTNewtype parsershould_failreadFail008 polykinds/T11459 typecheckshould_failT15523 typecheckshould_failT15796 typecheckshould_failT17955 typecheckshould_failT18891a typecheckshould_failT21447 typecheckshould_failtcfail156 |
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TcRnIllegalTypeData :: TcRnMessage | TcRnIllegalTypeData is an error that occurs when a See Note [Type data declarations] Test case: type-datashould_failTDNoPragma |
TcRnTypeDataForbids :: !TypeDataForbids -> TcRnMessage | TcRnTypeDataForbids is an error that occurs when a See Note [Type data declarations] Test cases: type-datashould_failTDDeriving type-datashould_failTDRecordsGADT type-datashould_failTDRecordsH98 type-datashould_failTDStrictnessGADT type-datashould_failTDStrictnessH98 |
TcRnUnsatisfiedMinimalDef :: ClassMinimalDef -> TcRnMessage | TcRnUnsatisfiedMinimalDef is a warning that occurs when a class instance is missing methods that are required by the minimal definition. Example: class C a where foo :: a -> a instance C () -- | foo needs to be defined here Test cases: typecheckprog001typecheck.prog001 typecheckshould_compiletc126 typecheckshould_compileT7903 typecheckshould_compiletc116 typecheckshould_compiletc175 typecheckshould_compileHasKey typecheckshould_compiletc125 typecheckshould_compiletc078 typecheckshould_compiletc161 typecheckshould_failT5051 typecheckshould_compileT21583 backpackshould_compilebkp47 backpackshould_failbkpfail25 parsershould_compileT2245 parsershould_compileread014 indexed-typesshould_compileClass3 indexed-typesshould_compileSimple2 indexed-typesshould_failT7862 derivingshould_compilederiving-1935 derivingshould_compileT9968a derivingshould_compiledrv003 derivingshould_compileT4966 derivingshould_compileT14094 perfcompilerT15304 warningsminimalWarnMinimal simplCoreshould_compilesimpl020 deSugarshould_compileT14546d ghciscriptsT5820 ghciscriptsghci019 |
TcRnMisplacedInstSig :: Name -> LHsSigType GhcRn -> TcRnMessage |
Test case: module/mod45 |
TcRnNoRebindableSyntaxRecordDot :: TcRnMessage | TcRnNoRebindableSyntaxRecordDot is an error triggered by an overloaded record update without RebindableSyntax enabled. Example(s): Test cases: parsershould_failRecordDotSyntaxFail5 |
TcRnNoFieldPunsRecordDot :: TcRnMessage | TcRnNoFieldPunsRecordDot is an error triggered by the use of record field puns in an overloaded record update without enabling NamedFieldPuns. Example(s): print $ a{ foo.bar.baz.quux } Test cases: parsershould_failRecordDotSyntaxFail12 |
TcRnIllegalStaticExpression :: HsExpr GhcPs -> TcRnMessage | TcRnIllegalStaticExpression is an error thrown when user creates a static pointer via TemplateHaskell without enabling the StaticPointers extension. Example(s): Test cases: th/T14204 |
TcRnListComprehensionDuplicateBinding :: Name -> TcRnMessage | TcRnListComprehensionDuplicateBinding is an error triggered by duplicate let-bindings in a list comprehension. Example(s): [ () | let a = 13 | let a = 17 ] Test cases: typecheckshould_failtcfail092 |
TcRnEmptyStmtsGroup :: EmptyStatementGroupErrReason -> TcRnMessage | TcRnEmptyStmtsGroup is an error triggered by an empty list of statements
in a statement block. For more information, see Example(s):
do proc () -> do Test cases: renameshould_failRnEmptyStatementGroup1 |
TcRnLastStmtNotExpr :: HsStmtContextRn -> UnexpectedStatement -> TcRnMessage | TcRnLastStmtNotExpr is an error caused by the last statement in a statement block not being an expression. Example(s): do x <- pure () do let x = 5 Test cases: renameshould_failT6060 parsershould_failT3811g parsershould_failreadFail028 |
TcRnUnexpectedStatementInContext :: HsStmtContextRn -> UnexpectedStatement -> Maybe Extension -> TcRnMessage | TcRnUnexpectedStatementInContext is an error when a statement appears in an unexpected context (e.g. an arrow statement appears in a list comprehension). Example(s): Test cases: parsershould_failreadFail042 parsershould_failreadFail038 parsershould_failreadFail043 |
TcRnIllegalTupleSection :: TcRnMessage | TcRnIllegalTupleSection is an error triggered by usage of a tuple section without enabling the TupleSections extension. Example(s): (5,) Test cases: renameshould_failrnfail056 |
TcRnIllegalImplicitParameterBindings :: Either (HsLocalBindsLR GhcPs GhcPs) (HsLocalBindsLR GhcRn GhcPs) -> TcRnMessage | TcRnIllegalImplicitParameterBindings is an error triggered by binding an implicit parameter in an mdo block. Example(s): mdo { let { ?x = 5 }; () } Test cases: renameshould_failRnImplicitBindInMdoNotation |
TcRnSectionWithoutParentheses :: HsExpr GhcPs -> TcRnMessage | TcRnSectionWithoutParentheses is an error triggered by attempting to use an operator section without parentheses. Example(s):
( Test cases: renameshould_failT2490 renameshould_failT5657 |
TcRnBindingOfExistingName :: RdrName -> TcRnMessage | TcRnBindingOfExistingName is an error triggered by an attempt to rebind built-in syntax, punned list or tuple syntax, or a name quoted via Template Haskell. Examples: data [] data (->) $(pure [ValD (VarP 'succ) (NormalB (ConE 'True)) []]) Test cases: renameshould_failT14907b renameshould_failT22839 renameshould_failrnfail042 th/T13968 |
TcRnMultipleFixityDecls :: SrcSpan -> RdrName -> TcRnMessage | TcRnMultipleFixityDecls is an error triggered by multiple fixity declarations for the same operator. Example(s): infixr 6 $$ infixl 4 $$ Test cases: renameshould_failRnMultipleFixityFail |
TcRnIllegalPatternSynonymDecl :: TcRnMessage | TcRnIllegalPatternSynonymDecl is an error thrown when a user defines a pattern synonyms without enabling the PatternSynonyms extension. Example: pattern O :: Int pattern O = 0 Test cases: renameshould_failRnPatternSynonymFail |
TcRnIllegalClassBinding :: DeclSort -> HsBindLR GhcPs GhcPs -> TcRnMessage | TcRnIllegalClassBinding is an error triggered by a binding in a class or instance declaration of an illegal form. Examples: class ZeroOne a where zero :: a one :: a instance ZeroOne Int where (zero,one) = (0,1) class C a where pattern P = () Test cases: module/mod48 patsynshould_failT9705-1 patsynshould_failT9705-2 typecheckshould_failtcfail021 |
TcRnOrphanCompletePragma :: TcRnMessage | TcRnOrphanCompletePragma is an error triggered by a {-# COMPLETE #-} pragma which does not mention any data constructors or pattern synonyms defined in the current module. Test cases: patsynshould_failT13349 |
TcRnEmptyCase :: HsMatchContextRn -> TcRnMessage | TcRnEmptyCase is an error thrown when a user uses a case expression with an empty list of alternatives without enabling the EmptyCase extension. Example(s): case () of Test cases: renameshould_failRnEmptyCaseFail |
TcRnNonStdGuards :: NonStandardGuards -> TcRnMessage | TcRnNonStdGuards is a warning thrown when a user uses non-standard guards (e.g. patterns in guards) without enabling the PatternGuards extension. More realistically: the user has explicitly disabled PatternGuards, as it is enabled by default with `-XHaskell2010`. Example(s): f | 5 <- 2 + 3 = ... Test cases: renameshould_compilern049 |
TcRnDuplicateSigDecl :: NonEmpty (LocatedN RdrName, Sig GhcPs) -> TcRnMessage | TcRnDuplicateSigDecl is an error triggered by two or more signatures for one entity. Examples: f :: Int -> Bool f :: Int -> Bool f _ = True g x = x {-# INLINE g #-} {-# NOINLINE g #-} pattern P = () {-# COMPLETE P #-} {-# COMPLETE P #-} Test cases: module/mod68 parsershould_failOpaqueParseFail4 patsynshould_failT12165 renameshould_failrnfail048 renameshould_failT5589 renameshould_failT7338 renameshould_failT7338a |
TcRnMisplacedSigDecl :: Sig GhcRn -> TcRnMessage | TcRnMisplacedSigDecl is an error triggered by the pragma application
in the wrong context, like Example: f x = x {-# MINIMAL f #-} Test cases: renameshould_failT18138 warningsminimalWarnMinimalFail1 |
TcRnUnexpectedDefaultSig :: Sig GhcPs -> TcRnMessage | TcRnUnexpectedDefaultSig is an error thrown when a user uses default signatures without enabling the DefaultSignatures extension. Example: class C a where m :: a default m :: Num a => a m = 0 Test cases: renameshould_failRnDefaultSigFail |
TcRnDuplicateMinimalSig :: LSig GhcPs -> LSig GhcPs -> [LSig GhcPs] -> TcRnMessage | TcRnDuplicateMinimalSig is an error triggered by two or more minimal signatures for one type class. Example: class C where f :: () {-# MINIMAL f #-} {-# MINIMAL f #-} Test cases: renameshould_failRnMultipleMinimalPragmaFail |
TcRnIllegalInvisTyVarBndr :: !(LHsTyVarBndr (HsBndrVis GhcRn) GhcRn) -> TcRnMessage |
Example:
{-# LANGUAGE NoTypeAbstractions #-} -- extension disabled
data T Test case: T22560_fail_ext |
TcRnInvalidInvisTyVarBndr :: !Name -> !(LHsTyVarBndr (HsBndrVis GhcRn) GhcRn) -> TcRnMessage |
Example: type P :: forall a -> Type data P @a = MkP Test cases: T22560_fail_a T22560_fail_b |
TcRnInvisBndrWithoutSig :: !Name -> !(LHsTyVarBndr (HsBndrVis GhcRn) GhcRn) -> TcRnMessage |
Example: data T @k (a :: k) -- No CUSK, no SAKS Test case: T22560_fail_d |
TcRnDeprecatedInvisTyArgInConPat :: TcRnMessage | TcRnDeprecatedInvisTyArgInConPat is a warning that triggers on type applications in constructor patterns when the user has not enabled '-XTypeAbstractions' but instead has enabled both '-XScopedTypeVariables' and '-XTypeApplications'. This warning is a deprecation mechanism that is scheduled until GHC 9.12. |
TcRnUnexpectedStandaloneDerivingDecl :: TcRnMessage | TcRnUnexpectedStandaloneDerivingDecl is an error thrown when a user uses standalone deriving without enabling the StandaloneDeriving extension. Example: deriving instance Eq Foo Test cases: renameshould_failRnUnexpectedStandaloneDeriving |
TcRnUnusedVariableInRuleDecl :: FastString -> Name -> TcRnMessage | TcRnUnusedVariableInRuleDecl is an error triggered by forall'd variable in rewrite rule that does not appear on left-hand side Example: {-# RULES "rule" forall a. id = id #-} Test cases: renameshould_failExplicitForAllRules2 |
TcRnUnexpectedStandaloneKindSig :: TcRnMessage | TcRnUnexpectedStandaloneKindSig is an error thrown when a user uses standalone kind signature without enabling the StandaloneKindSignatures extension. Example: type D :: Type data D = D Test cases: saksshould_failsaks_fail001 |
TcRnIllegalRuleLhs :: RuleLhsErrReason -> FastString -> LHsExpr GhcRn -> HsExpr GhcRn -> TcRnMessage | TcRnIllegalRuleLhs is an error triggered by malformed left-hand side of rewrite rule Examples: {-# RULES "test" forall x. f x = x #-} {-# RULES "test" forall x. case x of = x #-} Test cases: renameshould_failT15659 |
TcRnDuplicateRoleAnnot :: NonEmpty (LRoleAnnotDecl GhcPs) -> TcRnMessage | TcRnDuplicateRoleAnnot is an error triggered by two or more role annotations for one type Example: data D a type role D phantom type role D phantom Test cases: rolesshould_failRoles8 |
TcRnDuplicateKindSig :: NonEmpty (LStandaloneKindSig GhcPs) -> TcRnMessage | TcRnDuplicateKindSig is an error triggered by two or more standalone kind signatures for one type Example: type D :: Type type D :: Type data D Test cases: saksshould_failsaks_fail002 |
TcRnIllegalDerivStrategy :: DerivStrategy GhcPs -> TcRnMessage | TcRnIllegalDerivStrategy is an error thrown when a user uses deriving strategy without enabling the DerivingStrategies extension or uses deriving via without enabling the DerivingVia extension. Examples: data T = T deriving stock Eq data T = T deriving via Eq T Test cases: derivingshould_failderiving-via-fail3 derivingshould_failT10598_fail4 |
TcRnIllegalMultipleDerivClauses :: TcRnMessage | TcRnIllegalMultipleDerivClauses is an error thrown when a user uses two or more deriving clauses without enabling the DerivingStrategies extension. Example: data T = T deriving Eq deriving Ord Test cases: derivingshould_failT10598_fail5 |
TcRnNoDerivStratSpecified :: Bool -> TcRnMessage | TcRnNoDerivStratSpecified is a warning implied by -Wmissing-deriving-strategies and triggered by deriving clause without specified deriving strategy. Example: data T = T deriving Eq Test cases: renameshould_compileT15798a renameshould_compileT15798b renameshould_compileT15798c |
TcRnStupidThetaInGadt :: HsDocContext -> TcRnMessage | TcRnStupidThetaInGadt is an error triggered by data contexts in GADT-style data declaration Example: data (Eq a) => D a where MkD :: D Int Test cases: renameshould_failRnStupidThetaInGadt |
TcRnShadowedTyVarNameInFamResult :: IdP GhcPs -> TcRnMessage | TcRnShadowedTyVarNameInFamResult is an error triggered by type variable in type family result that shadows type variable from left hand side Example: type family F a b c = b Test cases: ghciscriptsT6018ghcirnfail renameshould_failT6018rnfail |
TcRnIncorrectTyVarOnLhsOfInjCond :: IdP GhcRn -> LIdP GhcPs -> TcRnMessage | TcRnIncorrectTyVarOnRhsOfInjCond is an error caused by a situation where the left-hand side of an injectivity condition of a type family is not a variable referring to the type family result. See Note [Renaming injectivity annotation] for more details. Example: type family F a = r | a -> a Test cases: ghciscriptsT6018ghcirnfail renameshould_failT6018rnfail |
TcRnUnknownTyVarsOnRhsOfInjCond :: [Name] -> TcRnMessage | TcRnUnknownTyVarsOnRhsOfInjCond is an error triggered by out-of-scope type variables on the right-hand side of a of an injectivity condition of a type family Example: type family F a = res | res -> b Test cases: ghciscriptsT6018ghcirnfail renameshould_failT6018rnfail |
TcRnLookupInstance :: !Class -> ![Type] -> !LookupInstanceErrReason -> TcRnMessage | TcRnLookupInstance groups several errors emitted when looking up class instances. Test cases: none |
TcRnBadlyStaged | TcRnBadlyStaged is an error that occurs when a TH binding is used in an invalid stage. Test cases: T17820d |
Fields
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TcRnStageRestriction | TcRnStageRestriction is an error that occurs when a top level splice refers to a local name. Test cases: T17820, T21547, T5795, qq00[1-4], annfail0{3,4,6,9} |
Fields
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TcRnBadlyStagedType | TcRnBadlyStagedWarn is a warning that occurs when a TH type binding is used in an invalid stage. Controlled by flags: - Wbadly-staged-type Test cases: T23829_timely T23829_tardy T23829_hasty |
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TcRnTyThingUsedWrong | TcRnTyThingUsedWrong is an error that occurs when a thing is used where another thing was expected. Test cases: none |
Fields
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TcRnCannotDefaultKindVar | TcRnCannotDefaultKindVar is an error that occurs when attempting to use
unconstrained kind variables whose type isn't Test cases: T11334b |
Fields
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TcRnUninferrableTyVar | TcRnUninferrableTyVar is an error that occurs when metavariables in a type could not be defaulted. Test cases: T17301, T17562, T17567, T17567StupidTheta, T15474, T21479 |
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TcRnSkolemEscape | TcRnSkolemEscape is an error that occurs when type variables from an outer scope is used in a context where they should be locally scoped. Test cases: T15076, T15076b, T14880-2, T15825, T14880, T15807, T16946, T14350, T14040A, T15795, T15795a, T14552 |
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TcRnPatSynEscapedCoercion | TcRnPatSynEscapedCoercion is an error indicating that a coercion escaped from a pattern synonym into a type. See Note [Coercions that escape] in GHC.Tc.TyCl.PatSyn Test cases: T14507 |
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TcRnPatSynExistentialInResult | TcRnPatSynExistentialInResult is an error indicating that the result type of a pattern synonym mentions an existential type variable. Test cases: PatSynExistential |
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TcRnPatSynArityMismatch | TcRnPatSynArityMismatch is an error indicating that the number of arguments in a pattern synonym's equation differs from the number of parameters in its signature. Test cases: PatSynArity |
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TcRnPatSynInvalidRhs | TcRnPatSynInvalidRhs is an error group indicating that the pattern on the right hand side of a pattern synonym is invalid. Test cases: unidir, T14112 |
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TcRnZonkerMessage :: ZonkerMessage -> TcRnMessage | TcRnZonkerMessage is collection of errors that occur when zonking, i.e. filling in metavariables with their final values. See |
TcRnTyFamDepsDisabled :: TcRnMessage | TcRnTyFamDepsDisabled is an error indicating that a type family injectivity annotation was used without enabling the extension TypeFamilyDependencies. Test cases: T11381 |
TcRnAbstractClosedTyFamDecl :: TcRnMessage | TcRnAbstractClosedTyFamDecl is an error indicating that an abstract closed type family was declared in a regular source file, while it is only allowed in hs-boot files. Test cases: ClosedFam4 |
TcRnPartialFieldSelector | TcRnPartialFieldSelector is a warning indicating that a record selector was not defined for all constructors of a data type. Test cases: DRFPartialFields, T7169 |
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TcRnHasFieldResolvedIncomplete :: !Name -> TcRnMessage | TcRnHasFieldResolvedIncomplete is a warning triggered when a HasField constraint is resolved for a record field for which a `getField @"field"` application might not be successful. Currently, this means that the warning is triggered when the parent data type of that record field does not have that field in all its constructors. Example(s): data T = T1 | T2 {x :: Bool} f :: HasField t "x" Bool => t -> Bool f = getField @"x" g :: T -> Bool g = f Test cases: TcIncompleteRecSel |
TcRnBadFieldAnnotation | TcRnBadFieldAnnotation is an error/warning group indicating that a strictness/unpack related data type field annotation is invalid. |
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TcRnSuperclassCycle | TcRnSuperclassCycle is an error indicating that a class has a superclass cycle. Test cases: mod40, tcfail027, tcfail213, tcfail216, tcfail217, T9415, T9739 |
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TcRnDefaultSigMismatch | TcRnDefaultSigMismatch is an error indicating that a default method signature doesn't match the regular method signature. Test cases: T7437, T12918a, T12918b, T12151 |
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TcRnTyFamsDisabled | TcRnTyFamsDisabled is an error indicating that a type family or instance was declared while the extension TypeFamilies was disabled. Test cases: TyFamsDisabled |
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TcRnBadTyConTelescope :: !TyCon -> TcRnMessage | TcRnBadTyConTelescope is an error caused by an ill-scoped Example: class C a (b :: Proxy a) (c :: Proxy b) where type T c a Test cases: BadTelescope{∅,3,4} T14066{f,g} T14887 T15591{b,c} T15743{c,d} T15764 T23252 |
TcRnTyFamResultDisabled | TcRnTyFamResultDisabled is an error indicating that a result variable was used on a type family while the extension TypeFamilyDependencies was disabled. Test cases: T13571, T13571a |
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TcRnRoleValidationFailed | TcRnRoleValidationFailed is an error indicating that a variable was assigned an invalid role by the inference algorithm. This is only performed with -dcore-lint. |
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TcRnCommonFieldResultTypeMismatch | TcRnCommonFieldResultTypeMismatch is an error indicating that a sum type declares the same field name in multiple constructors, but the constructors' result types differ. Test cases: CommonFieldResultTypeMismatch |
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TcRnCommonFieldTypeMismatch | TcRnCommonFieldTypeMismatch is an error indicating that a sum type declares the same field name in multiple constructors, but their types differ. Test cases: CommonFieldTypeMismatch |
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TcRnClassExtensionDisabled | TcRnClassExtensionDisabled is an error indicating that a class was declared with an extension feature while the extension was disabled. |
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TcRnDataConParentTypeMismatch | TcRnDataConParentTypeMismatch is an error indicating that a data constructor was declared with a type that doesn't match its type constructor (i.e. a GADT result type and its data name). Test cases: T7175, T13300, T14719, T18357, T18357b, gadt11, tcfail155, tcfail176 |
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TcRnGADTsDisabled | TcRnGADTsDisabled is an error indicating that a GADT was declared while the extension GADTs was disabled. Test cases: ghci057, T9293 |
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TcRnExistentialQuantificationDisabled | TcRnExistentialQuantificationDisabled is an error indicating that a data constructor was declared with existential features while the extension ExistentialQuantification was disabled. Test cases: ghci057, T9293, gadtSyntaxFail001, gadtSyntaxFail002, gadtSyntaxFail003, prog006, rnfail053, T12083a |
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TcRnGADTDataContext | TcRnGADTDataContext is an error indicating that a GADT was declared with a data type context. This error is emitted in the tc, but it is also caught in the renamer. |
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TcRnMultipleConForNewtype | TcRnMultipleConForNewtype is an error indicating that a newtype was declared with multiple constructors. This error is caught by the parser. |
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TcRnKindSignaturesDisabled | TcRnKindSignaturesDisabled is an error indicating that a kind signature was used in a data type declaration while the extension KindSignatures was disabled. Test cases: T20873c, readFail036 |
TcRnEmptyDataDeclsDisabled | TcRnEmptyDataDeclsDisabled is an error indicating that a data type was declared with no constructors while the extension EmptyDataDecls was disabled. Test cases: readFail035 |
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TcRnRoleMismatch | TcRnRoleMismatch is an error indicating that the role specified in an annotation differs from its inferred role. Test cases: T7253, Roles11 |
Fields
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TcRnRoleCountMismatch | TcRnRoleCountMismatch is an error indicating that the number of roles in an annotation doesn't match the number of type parameters. Test cases: Roles6 |
Fields
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TcRnIllegalRoleAnnotation | TcRnIllegalRoleAnnotation is an error indicating that a role annotation was attached to a decl that doesn't allow it. Test cases: Roles5 |
Fields
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TcRnRoleAnnotationsDisabled | TcRnRoleAnnotationsDisabled is an error indicating that a role annotation was declared while the extension RoleAnnotations was disabled. Test cases: Roles5, TH_Roles1 |
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TcRnIncoherentRoles | TcRnIncoherentRoles is an error indicating that a role annotation for a class parameter was declared as not nominal. Test cases: T8773 |
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TcRnPrecedenceParsingError | TcRnPrecedenceParsingError is an error caused by attempting to use operators with the same precedence in one infix expression. Example: eq :: (a ~ b ~ c) :~: () Test cases: module/mod61 parsershould_failreadFail016 renameshould_failrnfail017 renameshould_failT9077 typecheckshould_failT18252a |
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TcRnSectionPrecedenceError | TcRnPrecedenceParsingError is an error caused by attempting to use an operator with higher precedence than the operand. Example: k = (-3 **) where (**) = const infixl 7 ** Test cases: overloadedrecfldsshould_failT13132_duplicaterecflds parsershould_failreadFail023 renameshould_failrnfail019 th/TH_unresolvedInfix2 |
TcRnTypeSynonymCycle | TcRnTypeSynonymCycle is an error indicating that a cycle between type synonyms has occurred. Test cases: mod27, ghc-e-fail2, bkpfail29 |
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TcRnSelfImport | TcRnSelfImport is an error indicating that a module contains an import of itself. Test cases: T9032 |
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TcRnNoExplicitImportList | TcRnNoExplicitImportList is a warning indicating that an import statement did not include an explicit import list. Test cases: T1789, T4489 |
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TcRnSafeImportsDisabled | TcRnSafeImportsDisabled is an error indicating that an import was
declared using the Test cases: Mixed01 |
Fields
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TcRnDeprecatedModule | TcRnDeprecatedModule is a warning indicating that an imported module is annotated with a warning or deprecation pragma. Test cases: DeprU |
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TcRnCompatUnqualifiedImport | TcRnCompatUnqualifiedImport is a warning indicating that a special module (right now only Data.List) was imported unqualified without import list, for compatibility reasons. Test cases: T17244A |
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TcRnRedundantSourceImport | TcRnRedundantSourceImport is a warning indicating that a {-# SOURCE #-} import was used when there is no import cycle. Test cases: none |
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TcRnImportLookup | TcRnImportLookup is a group of errors about bad imported names. |
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TcRnUnusedImport | TcRnUnusedImport is a group of errors about unused imports. |
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TcRnDuplicateDecls | TcRnDuplicateDecls is an error indicating that the same name was used for multiple declarations. Test cases: FieldSelectors, overloadedrecfldsfail03, T17965, NFSDuplicate, T9975a, TDMultiple01, mod19, mod38, mod21, mod66, mod20, TDPunning, mod18, mod22, TDMultiple02, T4127a, ghci048, T8932, rnfail015, rnfail010, rnfail011, rnfail013, rnfail002, rnfail003, rn_dup, rnfail009, T7164, rnfail043, TH_dupdecl, rnfail012 |
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TcRnPackageImportsDisabled :: TcRnMessage | TcRnPackageImportsDisabled is an error indicating that an import uses a package qualifier while the extension PackageImports was disabled. Test cases: PackageImportsDisabled |
TcRnIllegalDataCon | TcRnIllegalDataCon is an error indicating that a data constructor was defined using a lowercase name, or a symbolic name in prefix position. Mostly caught by PsErrNotADataCon. Test cases: None |
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TcRnNestedForallsContexts :: !NestedForallsContextsIn -> TcRnMessage | TcRnNestedForallsContexts is an error indicating that multiple foralls or
contexts are nested/curried where this is not supported,
like Test cases: T12087, T14320, T16114, T16394, T16427, T18191, T18240a, T18240b, T18455, T5951 |
TcRnRedundantRecordWildcard :: TcRnMessage | TcRnRedundantRecordWildcard is a warning indicating that a pattern uses a record wildcard even though all of the record's fields are bound explicitly. Test cases: T15957_Fail |
TcRnUnusedRecordWildcard | TcRnUnusedRecordWildcard is a warning indicating that a pattern uses a record wildcard while none of the fields bound by it are used. Test cases: T15957_Fail |
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TcRnUnusedName | TcRnUnusedName is a warning indicating that a defined or imported name is not used in the module. Test cases: ds053, mc10, overloadedrecfldsfail05, overloadedrecfldsfail06, prog018, read014, rn040, rn041, rn047, rn063, T13839, T13839a, T13919, T17171b, T17a, T17b, T17d, T17e, T18470, T1972, t22391, t22391j, T2497, T3371, T3449, T7145b, T7336, TH_recover_warns, unused_haddock, WarningGroups, werror |
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TcRnQualifiedBinder | TcRnQualifiedBinder is an error indicating that a qualified name was used in binding position. Test cases: mod62, rnfail021, rnfail034, rnfail039, rnfail046 |
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TcRnTypeApplicationsDisabled | TcRnTypeApplicationsDisabled is an error indicating that a type application was used while the extension TypeApplications was disabled. Test cases: T12411, T12446, T15527, T16133, T18251c |
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TcRnInvalidRecordField | TcRnInvalidRecordField is an error indicating that a record field was used that doesn't exist in a constructor. Test cases: T13644, T13847, T17469, T8448, T8570, tcfail083, tcfail084 |
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TcRnTupleTooLarge | TcRnTupleTooLarge is an error indicating that the arity of a tuple exceeds mAX_TUPLE_SIZE. Test cases: T18723a, T18723b, T18723c, T6148a, T6148b, T6148c, T6148d |
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TcRnCTupleTooLarge | TcRnCTupleTooLarge is an error indicating that the arity of a constraint tuple exceeds mAX_CTUPLE_SIZE. Test cases: T10451 |
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TcRnIllegalInferredTyVars | TcRnIllegalInferredTyVars is an error indicating that some type variables
were quantified as inferred (like Test cases: ExplicitSpecificity5, ExplicitSpecificity6, ExplicitSpecificity8, ExplicitSpecificity9 |
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TcRnAmbiguousName | TcRnAmbiguousName is an error indicating that an unbound name might refer to multiple names in scope. Test cases: BootFldReexport, DRFUnused, duplicaterecfldsghci01, GHCiDRF, mod110, mod151, mod152, mod153, mod164, mod165, NoFieldSelectorsFail, overloadedrecfldsfail02, overloadedrecfldsfail04, overloadedrecfldsfail11, overloadedrecfldsfail12, overloadedrecfldsfail13, overloadedrecfldswasrunnowfail06, rnfail044, T11167_ambig, T11167_ambiguous_fixity, T13132_duplicaterecflds, T15487, T16745, T17420, T18999_NoDisambiguateRecordFields, T19397E1, T19397E2, T23010_fail, tcfail037 |
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TcRnBindingNameConflict | TcRnBindingNameConflict is an error indicating that multiple local or top-level bindings have the same name. Test cases: dsrun006, mdofail002, mdofail003, mod23, mod24, qq006, rnfail001, rnfail004, SimpleFail6, T14114, T16110_Fail1, tcfail038, TH_spliceD1, T22478b, TyAppPat_NonlinearMultiAppPat, TyAppPat_NonlinearMultiPat, TyAppPat_NonlinearSinglePat, |
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TcRnNonCanonicalDefinition | TcRnNonCanonicalDefinition is a warning indicating that an instance
defines an implementation for a method that should not be defined in a way
that deviates from its default implementation, for example because it has
been scheduled to be absorbed into another method, like Test cases: WCompatWarningsOn, WCompatWarningsOff, WCompatWarningsOnOff |
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TcRnImplicitImportOfPrelude :: TcRnMessage | TcRnImplicitImportOfPrelude is a warning, controlled by Example: {-# OPTIONS_GHC -fwarn-implicit-prelude #-} module M where {} Test case: rn055 |
TcRnMissingMain | TcRnMissingMain is an error that occurs when a Main module does
not define a main function (named Example: module Main where {} Test cases: T414, T7765, readFail021, rnfail007, T13839b, T17171a, T16453E1, tcfail030, T19397E3, T19397E4 |
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TcRnGhciUnliftedBind :: !Id -> TcRnMessage | TcRnGhciUnliftedBind is an error that occurs when a user attempts to bind an unlifted value in GHCi. Example (in GHCi): let a = (# 1#, 3# #) Test cases: T9140, T19035b |
TcRnGhciMonadLookupFail | TcRnGhciMonadLookupFail is an error that occurs when the user sets
the GHCi monad, using the GHC API Example: import GHC ( setGHCiMonad ) ... setGHCiMonad NoSuchThing Test cases: none |
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TcRnMissingRoleAnnotation :: Name -> [Role] -> TcRnMessage | TcRnMissingRoleAnnotation is a warning that occurs when type declaration doesn't have a role annotatiosn Controlled by flags: - Wmissing-role-annotations Test cases: T22702 |
TcRnPatersonCondFailure | TcRnPatersonCondFailure is an error that occurs when an instance declaration fails to conform to the Paterson conditions. Which particular condition fails depends on the constructor of PatersonCondFailure See Note [Paterson conditions]. Test cases: T15231, tcfail157, T15316, T19187a, fd-loop, tcfail108, tcfail154, T15172, tcfail214 |
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TcRnImplicitRhsQuantification :: LocatedN RdrName -> TcRnMessage | TcRnImplicitRhsQuantification is a warning that occurs when GHC implicitly quantifies over a type variable that occurs free on the RHS of the type declaration that is not mentioned on the LHS Example: type T = 'Nothing :: Maybe a Controlled by flags: - Wimplicit-rhs-quantification Test cases: T23510a T23510b |
TcRnIllformedTypePattern :: !(Pat GhcRn) -> TcRnMessage | TcRnIllformedTypePattern is an error raised when the pattern corresponding to a required type argument (visible forall) does not have a form that can be interpreted as a type pattern. Example: vfun :: forall (a :: k) -> () vfun !x = () -- ^^ -- bang-patterns not allowed as type patterns Test cases: T22326_fail_bang_pat |
TcRnIllegalTypePattern :: TcRnMessage | TcRnIllegalTypePattern is an error raised when a pattern constructed
with the Example: case x of (type _) -> True -- the (type _) pattern is illegal here _ -> False Test cases: T22326_fail_ado T22326_fail_caseof |
TcRnIllformedTypeArgument :: !(LHsExpr GhcRn) -> TcRnMessage | TcRnIllformedTypeArgument is an error raised when an argument that specifies a required type argument (instantiates a visible forall) does not have a form that can be interpreted as a type argument. Example: vfun :: forall (a :: k) -> () x = vfun (_ -> _) -- ^^^^^^^^^ -- lambdas not allowed in type arguments Test cases: T22326_fail_lam_arg |
TcRnIllegalTypeExpr :: TcRnMessage | TcRnIllegalTypeExpr is an error raised when an expression constructed
with the Example: xtop = type Int -- not a function argument
xarg = length (type Int) -- Test cases: T22326_fail_app T22326_fail_top |
TcRnInvalidDefaultedTyVar | TcRnInvalidDefaultedTyVar is an error raised when a defaulting plugin proposes to default a type variable that is not an unfilled metavariable Test cases: T23832_invalid |
TcRnNamespacedWarningPragmaWithoutFlag :: WarnDecl GhcPs -> TcRnMessage | TcRnNamespacedWarningPragmaWithoutFlag is an error that occurs when a namespace specifier is used in {-# WARNING ... #-} or {-# DEPRECATED ... #-} pragmas without the -XExplicitNamespaces extension enabled Example: {-# LANGUAGE NoExplicitNamespaces #-} f = id {-# WARNING data f "some warning message" #-} Test cases: T24396c |
TcRnInvisPatWithNoForAll :: HsTyPat GhcRn -> TcRnMessage | TcRnInvisPatWithNoForAll is an error raised when invisible type pattern is used without associated `forall` in types Examples: f :: Int f @t = 5 g :: [a -> a] g = [ @t x -> x :: t] Test cases: T17694c T17594d |
TcRnIllegalInvisibleTypePattern :: HsTyPat GhcPs -> TcRnMessage | TcRnIllegalInvisibleTypePattern is an error raised when invisible type pattern is used without the TypeAbstractions extension enabled Example: {-# LANGUAGE NoTypeAbstractions #-} id :: a -> a id @t x = x Test cases: T17694b |
TcRnNamespacedFixitySigWithoutFlag :: FixitySig GhcPs -> TcRnMessage | TcRnNamespacedFixitySigWithoutFlag is an error that occurs when a namespace specifier is used in fixity signatures without the -XExplicitNamespaces extension enabled Example: {-# LANGUAGE NoExplicitNamespaces #-}
f = const
infixl 7 data Test cases: T14032c |
TcRnDefaultedExceptionContext :: CtLoc -> TcRnMessage | TcRnDefaultedExceptionContext is a warning that is triggered when the backward-compatibility logic solving for implicit ExceptionContext constraints fires. Test cases: DefaultExceptionContext |
TcRnOutOfArityTyVar | TcRnOutOfArityTyVar is an error raised when the arity of a type synonym (as determined by the SAKS and the LHS) is insufficiently high to accommodate an implicit binding for a free variable that occurs in the outermost kind signature on the RHS of the said type synonym. Example: type SynBad :: forall k. k -> Type type SynBad = Proxy :: j -> Type Test cases: T24770a |
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TcRnMisplacedInvisPat :: HsTyPat GhcPs -> TcRnMessage |
Instances
data TcRnMessageOpts Source #
Constructors
TcRnMessageOpts | |
Fields
|
Instances
HasDefaultDiagnosticOpts TcRnMessageOpts Source # | |
Defined in GHC.Tc.Errors.Ppr Methods |
mkTcRnUnknownMessage :: (Diagnostic a, Typeable a, DiagnosticOpts a ~ NoDiagnosticOpts) => a -> TcRnMessage Source #
data TcRnMessageDetailed Source #
TcRnMessageDetailed
is an "internal" type (used only inside
Monad
that wraps a TcRnMessage
while also providing
any extra info needed to correctly pretty-print this diagnostic later on.
Constructors
TcRnMessageDetailed | |
Fields
|
Instances
Generic TcRnMessageDetailed Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: TcRnMessageDetailed -> Rep TcRnMessageDetailed x # to :: Rep TcRnMessageDetailed x -> TcRnMessageDetailed # | |||||
type Rep TcRnMessageDetailed Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep TcRnMessageDetailed = D1 ('MetaData "TcRnMessageDetailed" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "TcRnMessageDetailed" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 ErrInfo) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TcRnMessage))) |
data TypeDataForbids Source #
Things forbidden in type data
declarations.
See Note [Type data declarations]
Constructors
TypeDataForbidsDatatypeContexts | |
TypeDataForbidsLabelledFields | |
TypeDataForbidsStrictnessAnnotations | |
TypeDataForbidsDerivingClauses |
Instances
Outputable TypeDataForbids Source # | |||||
Defined in GHC.Tc.Errors.Types Methods ppr :: TypeDataForbids -> SDoc Source # | |||||
Generic TypeDataForbids Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: TypeDataForbids -> Rep TypeDataForbids x # to :: Rep TypeDataForbids x -> TypeDataForbids # | |||||
type Rep TypeDataForbids Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep TypeDataForbids = D1 ('MetaData "TypeDataForbids" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "TypeDataForbidsDatatypeContexts" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TypeDataForbidsLabelledFields" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "TypeDataForbidsStrictnessAnnotations" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TypeDataForbidsDerivingClauses" 'PrefixI 'False) (U1 :: Type -> Type))) |
Constructors
ErrInfo | |
Fields
|
data FixedRuntimeRepProvenance Source #
In what context did we require a type to have a fixed runtime representation?
Used by checkTypeHasFixedRuntimeRep
for throwing
representation polymorphism errors when validity checking.
See Note [Representation polymorphism checking] in GHC.Tc.Utils.Concrete
Constructors
FixedRuntimeRepDataConField | Data constructor fields must have a fixed runtime representation. Tests: T11734, T18534. |
FixedRuntimeRepPatSynSigArg | Pattern synonym signature arguments must have a fixed runtime representation. Test: RepPolyPatSynArg. |
FixedRuntimeRepPatSynSigRes | Pattern synonym signature scrutinee must have a fixed runtime representation. Test: RepPolyPatSynRes. |
data ShadowedNameProvenance Source #
Where a shadowed name comes from
Constructors
ShadowedNameProvenanceLocal !SrcLoc | The shadowed name is local to the module |
ShadowedNameProvenanceGlobal [GlobalRdrElt] | The shadowed name is global, typically imported from elsewhere. |
data RecordFieldPart Source #
Which parts of a record field are affected by a particular error or warning.
Constructors
RecordFieldDecl !Name | |
RecordFieldConstructor !Name | |
RecordFieldPattern !Name | |
RecordFieldUpdate |
data IllegalNewtypeReason Source #
Why the particular illegal newtype error arose together with more information, if any.
Constructors
DoesNotHaveSingleField !Int | |
IsNonLinear | |
IsGADT | |
HasConstructorContext | |
HasExistentialTyVar | |
HasStrictnessAnnotation |
Instances
Generic IllegalNewtypeReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: IllegalNewtypeReason -> Rep IllegalNewtypeReason x # to :: Rep IllegalNewtypeReason x -> IllegalNewtypeReason # | |||||
type Rep IllegalNewtypeReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep IllegalNewtypeReason = D1 ('MetaData "IllegalNewtypeReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "DoesNotHaveSingleField" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Int)) :+: (C1 ('MetaCons "IsNonLinear" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "IsGADT" 'PrefixI 'False) (U1 :: Type -> Type))) :+: (C1 ('MetaCons "HasConstructorContext" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "HasExistentialTyVar" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "HasStrictnessAnnotation" 'PrefixI 'False) (U1 :: Type -> Type)))) |
data BadRecordUpdateReason Source #
Why did we reject a record update?
Constructors
NoConstructorHasAllFields | No constructor has all of the required fields. |
Fields | |
MultiplePossibleParents | There are several possible parents which have all of the required fields, and we weren't able to disambiguate in any way. |
Fields
| |
InvalidTyConParent TyCon (NonEmpty RecSelParent) | We used type-directed disambiguation, but this resulted in an invalid parent (the type-directed parent is not among the parents we computed from the field labels alone). |
Instances
Generic BadRecordUpdateReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: BadRecordUpdateReason -> Rep BadRecordUpdateReason x # to :: Rep BadRecordUpdateReason x -> BadRecordUpdateReason # | |||||
type Rep BadRecordUpdateReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep BadRecordUpdateReason = D1 ('MetaData "BadRecordUpdateReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "NoConstructorHasAllFields" 'PrefixI 'True) (S1 ('MetaSel ('Just "conflictingFields") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [FieldLabelString])) :+: (C1 ('MetaCons "MultiplePossibleParents" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (RecSelParent, RecSelParent, [RecSelParent]))) :+: C1 ('MetaCons "InvalidTyConParent" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TyCon) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (NonEmpty RecSelParent))))) |
data InjectivityErrReason Source #
Why the particular injectivity error arose together with more information, if any.
Constructors
YesHasKinds | |
NoHasKinds |
Instances
data SuggestUndecidableInstances Source #
Instances
Show SuggestUndecidableInstances Source # | |
Defined in GHC.Tc.Errors.Types Methods showsPrec :: Int -> SuggestUndecidableInstances -> ShowS # show :: SuggestUndecidableInstances -> String # showList :: [SuggestUndecidableInstances] -> ShowS # | |
Eq SuggestUndecidableInstances Source # | |
Defined in GHC.Tc.Errors.Types Methods (==) :: SuggestUndecidableInstances -> SuggestUndecidableInstances -> Bool # (/=) :: SuggestUndecidableInstances -> SuggestUndecidableInstances -> Bool # |
data SuggestUnliftedTypes Source #
Constructors
SuggestUnliftedNewtypes | |
SuggestUnliftedDatatypes |
A description of whether something is a
data
ornewtype
(DataDeclSort
)data instance
ornewtype instance
(DataInstanceSort
)data family
(DataFamilySort
)
At present, this data type is only consumed by checkDataKindSig
.
Constructors
DataDeclSort NewOrData | |
DataInstanceSort NewOrData | |
DataFamilySort |
ppDataSort :: DataSort -> SDoc Source #
data AllowedDataResKind Source #
Helper type used in checkDataKindSig
.
Superficially similar to ContextKind
, but it lacks AnyKind
and AnyBoxedKind
, and instead of
provides TheKind
liftedTypeKindLiftedKind
, which is much simpler to match on and
handle in isAllowedDataResKind
.
Constructors
AnyTYPEKind | |
AnyBoxedKind | |
LiftedKind |
data NotClosedReason Source #
A data type to describe why a variable is not closed. See Note [Not-closed error messages] in GHC.Tc.Gen.Expr
Constructors
NotLetBoundReason | |
NotTypeClosed VarSet | |
NotClosed Name NotClosedReason |
data SuggestPartialTypeSignatures Source #
Instances
Show SuggestPartialTypeSignatures Source # | |
Defined in GHC.Tc.Errors.Types Methods showsPrec :: Int -> SuggestPartialTypeSignatures -> ShowS # show :: SuggestPartialTypeSignatures -> String # showList :: [SuggestPartialTypeSignatures] -> ShowS # | |
Eq SuggestPartialTypeSignatures Source # | |
Defined in GHC.Tc.Errors.Types Methods (==) :: SuggestPartialTypeSignatures -> SuggestPartialTypeSignatures -> Bool # (/=) :: SuggestPartialTypeSignatures -> SuggestPartialTypeSignatures -> Bool # |
data DeriveInstanceErrReason Source #
Why a particular typeclass instance couldn't be derived.
Constructors
DerivErrNotWellKinded | The typeclass instance is not well-kinded. |
DerivErrSafeHaskellGenericInst | |
DerivErrDerivingViaWrongKind !Kind !Type !Kind | |
DerivErrNoEtaReduce !Type | The instance type | We cannot derive instances in boot files |
DerivErrBootFileFound | |
DerivErrDataConsNotAllInScope !TyCon | |
DerivErrGNDUsedOnData | We cannot use GND on non-newtype types |
DerivErrNullaryClasses | We cannot derive instances of nullary classes |
DerivErrLastArgMustBeApp | Last arg must be newtype or data application |
DerivErrNoFamilyInstance !TyCon [Type] | |
DerivErrNotStockDeriveable !DeriveAnyClassEnabled | |
DerivErrHasAssociatedDatatypes !HasAssociatedDataFamInsts !AssociatedTyLastVarInKind !AssociatedTyNotParamOverLastTyVar | |
DerivErrNewtypeNonDeriveableClass | |
DerivErrCannotEtaReduceEnough !Bool | |
DerivErrOnlyAnyClassDeriveable | |
Fields
| |
DerivErrNotDeriveable !DeriveAnyClassEnabled | |
DerivErrNotAClass !PredType | The given |
DerivErrNoConstructors !TyCon | The given (representation of the) |
DerivErrLangExtRequired !Extension | |
DerivErrDunnoHowToDeriveForType !Type | GHC simply doesn't how to how derive the input |
DerivErrMustBeEnumType !TyCon | The given |
DerivErrMustHaveExactlyOneConstructor !TyCon | The given |
DerivErrMustHaveSomeParameters !TyCon | The given data type must have some parameters. |
DerivErrMustNotHaveClassContext !TyCon !ThetaType | The given data type must not have a class context. |
DerivErrBadConstructor !(Maybe HasWildcard) [DeriveInstanceBadConstructor] | We couldn't derive an instance for a particular data constructor for a variety of reasons. |
DerivErrGenerics [DeriveGenericsErrReason] | We couldn't derive a |
DerivErrEnumOrProduct !DeriveInstanceErrReason !DeriveInstanceErrReason | We couldn't derive an instance either because the type was not an enum type or because it did have more than one constructor. |
Instances
Generic DeriveInstanceErrReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: DeriveInstanceErrReason -> Rep DeriveInstanceErrReason x # to :: Rep DeriveInstanceErrReason x -> DeriveInstanceErrReason # | |||||
type Rep DeriveInstanceErrReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep DeriveInstanceErrReason = D1 ('MetaData "DeriveInstanceErrReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((((C1 ('MetaCons "DerivErrNotWellKinded" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Kind) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Int))) :+: (C1 ('MetaCons "DerivErrSafeHaskellGenericInst" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "DerivErrDerivingViaWrongKind" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Kind) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Kind))))) :+: (C1 ('MetaCons "DerivErrNoEtaReduce" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type)) :+: (C1 ('MetaCons "DerivErrBootFileFound" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "DerivErrDataConsNotAllInScope" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon))))) :+: ((C1 ('MetaCons "DerivErrGNDUsedOnData" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "DerivErrNullaryClasses" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "DerivErrLastArgMustBeApp" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "DerivErrNoFamilyInstance" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Type])) :+: C1 ('MetaCons "DerivErrNotStockDeriveable" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 DeriveAnyClassEnabled))) :+: (C1 ('MetaCons "DerivErrHasAssociatedDatatypes" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 HasAssociatedDataFamInsts) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 AssociatedTyLastVarInKind) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 AssociatedTyNotParamOverLastTyVar))) :+: C1 ('MetaCons "DerivErrNewtypeNonDeriveableClass" 'PrefixI 'False) (U1 :: Type -> Type))))) :+: (((C1 ('MetaCons "DerivErrCannotEtaReduceEnough" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Bool)) :+: (C1 ('MetaCons "DerivErrOnlyAnyClassDeriveable" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 DeriveAnyClassEnabled)) :+: C1 ('MetaCons "DerivErrNotDeriveable" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 DeriveAnyClassEnabled)))) :+: ((C1 ('MetaCons "DerivErrNotAClass" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 PredType)) :+: C1 ('MetaCons "DerivErrNoConstructors" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon))) :+: (C1 ('MetaCons "DerivErrLangExtRequired" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Extension)) :+: C1 ('MetaCons "DerivErrDunnoHowToDeriveForType" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type))))) :+: ((C1 ('MetaCons "DerivErrMustBeEnumType" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon)) :+: (C1 ('MetaCons "DerivErrMustHaveExactlyOneConstructor" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon)) :+: C1 ('MetaCons "DerivErrMustHaveSomeParameters" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon)))) :+: ((C1 ('MetaCons "DerivErrMustNotHaveClassContext" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 ThetaType)) :+: C1 ('MetaCons "DerivErrBadConstructor" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (Maybe HasWildcard)) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [DeriveInstanceBadConstructor]))) :+: (C1 ('MetaCons "DerivErrGenerics" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [DeriveGenericsErrReason])) :+: C1 ('MetaCons "DerivErrEnumOrProduct" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 DeriveInstanceErrReason) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 DeriveInstanceErrReason))))))) |
data UsingGeneralizedNewtypeDeriving Source #
Instances
data DeriveAnyClassEnabled Source #
Constructors
YesDeriveAnyClassEnabled | |
NoDeriveAnyClassEnabled |
Instances
Eq DeriveAnyClassEnabled Source # | |
Defined in GHC.Tc.Errors.Types Methods (==) :: DeriveAnyClassEnabled -> DeriveAnyClassEnabled -> Bool # (/=) :: DeriveAnyClassEnabled -> DeriveAnyClassEnabled -> Bool # |
data DeriveInstanceBadConstructor Source #
Constructors
DerivErrBadConExistential !DataCon | The given |
DerivErrBadConCovariant !DataCon | The given |
DerivErrBadConFunTypes !DataCon | The given |
DerivErrBadConWrongArg !DataCon | The given |
DerivErrBadConIsGADT !DataCon | The given |
DerivErrBadConHasExistentials !DataCon | The given |
DerivErrBadConHasConstraints !DataCon | The given |
DerivErrBadConHasHigherRankType !DataCon | The given |
data HasWildcard Source #
Constructors
YesHasWildcard | |
NoHasWildcard |
Instances
Eq HasWildcard Source # | |
Defined in GHC.Tc.Errors.Types |
hasWildcard :: Bool -> HasWildcard Source #
data BadAnonWildcardContext Source #
A context in which we don't allow anonymous wildcards.
data SoleExtraConstraintWildcardAllowed Source #
Whether a sole extra-constraint wildcard is allowed,
e.g. _ => ..
as opposed to ( .., _ ) => ..
.
data DeriveGenericsErrReason Source #
Constructors
DerivErrGenericsMustNotHaveDatatypeContext !TyCon | The type must not have some datatype context. |
DerivErrGenericsMustNotHaveExoticArgs !DataCon | The data constructor must not have exotic unlifted or polymorphic arguments. |
DerivErrGenericsMustBeVanillaDataCon !DataCon | The data constructor must be a vanilla constructor. |
DerivErrGenericsMustHaveSomeTypeParams !TyCon | The type must have some type parameters. check (d) from Note [Requirements for deriving Generic and Rep] in GHC.Tc.Deriv.Generics. |
DerivErrGenericsMustNotHaveExistentials !DataCon | The data constructor must not have existential arguments. |
DerivErrGenericsWrongArgKind !DataCon | The derivation applies a type to an argument involving the last parameter but the applied type is not of kind * -> *. |
data HasAssociatedDataFamInsts Source #
A type representing whether or not the input type has associated data family instances.
Constructors
YesHasAdfs | |
NoHasAdfs |
Instances
Eq HasAssociatedDataFamInsts Source # | |
Defined in GHC.Tc.Errors.Types Methods (==) :: HasAssociatedDataFamInsts -> HasAssociatedDataFamInsts -> Bool # (/=) :: HasAssociatedDataFamInsts -> HasAssociatedDataFamInsts -> Bool # |
data AssociatedTyLastVarInKind Source #
If YesAssocTyLastVarInKind
, the associated type of a typeclass
contains the last type variable of the class in a kind, which is not (yet) allowed
by GHC.
Constructors
YesAssocTyLastVarInKind !TyCon | The associated type family of the class |
NoAssocTyLastVarInKind |
Instances
Eq AssociatedTyLastVarInKind Source # | |
Defined in GHC.Tc.Errors.Types Methods (==) :: AssociatedTyLastVarInKind -> AssociatedTyLastVarInKind -> Bool # (/=) :: AssociatedTyLastVarInKind -> AssociatedTyLastVarInKind -> Bool # |
data AssociatedTyNotParamOverLastTyVar Source #
If NoAssociatedTyNotParamOverLastTyVar
, the associated type of a
typeclass is not parameterized over the last type variable of the class
Constructors
YesAssociatedTyNotParamOverLastTyVar !TyCon | The associated type family of the class |
NoAssociatedTyNotParamOverLastTyVar |
Instances
data MissingSignature Source #
What kind of thing is missing a type signature?
Used for reporting "missing signature"
warnings, see
tcRnMissingSignature
.
Constructors
MissingTopLevelBindingSig Name Type | |
MissingPatSynSig PatSyn | |
MissingTyConKindSig TyCon Bool | whether -XCUSKs is enabled |
Is the object we are dealing with exported or not?
Used for reporting "missing signature"
warnings, see
TcRnMissingSignature
.
Constructors
IsNotExported | |
IsExported |
data HsDocContext Source #
Constructors
TypeSigCtx SDoc | |
StandaloneKindSigCtx SDoc | |
PatCtx | |
SpecInstSigCtx | |
DefaultDeclCtx | |
ForeignDeclCtx (LocatedN RdrName) | |
DerivDeclCtx | |
RuleCtx FastString | |
TyDataCtx (LocatedN RdrName) | |
TySynCtx (LocatedN RdrName) | |
TyFamilyCtx (LocatedN RdrName) | |
FamPatCtx (LocatedN RdrName) | |
ConDeclCtx [LocatedN Name] | |
ClassDeclCtx (LocatedN RdrName) | |
ExprWithTySigCtx | |
TypBrCtx | |
HsTypeCtx | |
HsTypePatCtx | |
GHCiCtx | |
SpliceTypeCtx (LHsType GhcPs) | |
ClassInstanceCtx | |
GenericCtx SDoc |
data FixedRuntimeRepErrorInfo Source #
Stores the information to be reported in a representation-polymorphism error message.
Constructors
FRR_Info | |
Fields
|
A predicate with its arising location; used to encapsulate a constraint that will give rise to a diagnostic.
Constructors
EI | |
Fields
|
Instances
errorItemOrigin :: ErrorItem -> CtOrigin Source #
errorItemEqRel :: ErrorItem -> EqRel Source #
errorItemPred :: ErrorItem -> PredType Source #
errorItemCtLoc :: ErrorItem -> CtLoc Source #
data SolverReport Source #
A collection of main error messages and supplementary information.
In practice, we will:
- display the important messages first,
- then the error context (e.g. by way of a call to mkErrorReport
),
- then the supplementary information (e.g. relevant bindings, valid hole fits),
- then the hints ("Possible fix: ...").
So this is mostly just a way of making sure that the error context appears early on rather than at the end of the message.
See Note [Error report] for details.
Constructors
SolverReport | |
data SolverReportSupplementary Source #
Additional information to print in a SolverReport
, after the
important messages and after the error context.
See Note [Error report].
data SolverReportWithCtxt Source #
A TcSolverReportMsg
, together with context (e.g. enclosing implication constraints)
that are needed in order to report it.
Constructors
SolverReportWithCtxt | |
Fields
|
Instances
Generic SolverReportWithCtxt Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: SolverReportWithCtxt -> Rep SolverReportWithCtxt x # to :: Rep SolverReportWithCtxt x -> SolverReportWithCtxt # | |||||
type Rep SolverReportWithCtxt Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep SolverReportWithCtxt = D1 ('MetaData "SolverReportWithCtxt" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "SolverReportWithCtxt" 'PrefixI 'True) (S1 ('MetaSel ('Just "reportContext") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 SolverReportErrCtxt) :*: S1 ('MetaSel ('Just "reportContent") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TcSolverReportMsg))) |
data SolverReportErrCtxt Source #
Context needed when reporting a TcSolverReportMsg
, such as
the enclosing implication constraints or whether we are deferring type errors.
Constructors
CEC | |
Fields
|
Instances
Outputable SolverReportErrCtxt Source # | |
Defined in GHC.Tc.Errors.Ppr Methods ppr :: SolverReportErrCtxt -> SDoc Source # |
getUserGivens :: SolverReportErrCtxt -> [UserGiven] Source #
data TcSolverReportMsg Source #
An error reported after constraint solving. This is usually, some sort of unsolved constraint error, but we try to be specific about the precise problem we encountered.
Constructors
BadTelescope TyVarBndrs [TyCoVar] | Quantified variables appear out of dependency order. Example: forall (a :: k) k. ... Test cases: BadTelescope2, T16418, T16247, T16726, T18451. |
UserTypeError | We came across a custom type error and we have decided to report it. Example: type family F a where F a = TypeError (Text "error") err :: F () err = () Test cases: CustomTypeErrors0{1,2,3,4,5}, T12104. |
Fields
| |
UnsatisfiableError | Report a Wanted constraint of the form "Unsatisfiable msg". |
Fields
| |
ReportHoleError Hole HoleError | We want to report an out of scope variable or a typed hole.
See |
CannotUnifyVariable | Cannot unify a variable, because of a type mismatch. |
Mismatch | A mismatch between two types. |
FixedRuntimeRepError [FixedRuntimeRepErrorInfo] | A violation of the representation-polymorphism invariants. See |
BlockedEquality ErrorItem | An equality between two types is blocked on a kind equality between their kinds. Test cases: none. |
ExpectingMoreArguments Int TypedThing | Something was not applied to sufficiently many arguments. Example: instance Eq Maybe where {..} Test case: T11563. |
UnboundImplicitParams (NonEmpty ErrorItem) | Trying to use an unbound implicit parameter. Example: foo :: Int foo = ?param Test case: tcfail130. |
AmbiguityPreventsSolvingCt | A constraint couldn't be solved because it contains ambiguous type variables. Example: class C a b where f :: (a,b) x = fst f Test case: T4921. |
CannotResolveInstance | Could not solve a constraint; there were several unifying candidate instances but no matching instances. This is used to report as much useful information as possible about why we couldn't choose any instance, e.g. because of ambiguous type variables. |
OverlappingInstances | Could not solve a constraint using available instances because the instances overlap. Test cases: tcfail118, tcfail121, tcfail218. |
UnsafeOverlap | Could not solve a constraint from instances because instances declared in a Safe module cannot overlap instances from other modules (with -XSafeHaskell). Test cases: SH_Overlap{1,2,5,6,7,11}. |
Fields |
Instances
Generic TcSolverReportMsg Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: TcSolverReportMsg -> Rep TcSolverReportMsg x # to :: Rep TcSolverReportMsg x -> TcSolverReportMsg # | |||||
type Rep TcSolverReportMsg Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep TcSolverReportMsg = D1 ('MetaData "TcSolverReportMsg" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (((C1 ('MetaCons "BadTelescope" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TyVarBndrs) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [TyCoVar])) :+: (C1 ('MetaCons "UserTypeError" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorMsgType)) :+: C1 ('MetaCons "UnsatisfiableError" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorMsgType)))) :+: ((C1 ('MetaCons "ReportHoleError" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Hole) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 HoleError)) :+: C1 ('MetaCons "CannotUnifyVariable" 'PrefixI 'True) (S1 ('MetaSel ('Just "mismatchMsg") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 MismatchMsg) :*: S1 ('MetaSel ('Just "cannotUnifyReason") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CannotUnifyVariableReason))) :+: (C1 ('MetaCons "Mismatch" 'PrefixI 'True) ((S1 ('MetaSel ('Just "mismatchMsg") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 MismatchMsg) :*: S1 ('MetaSel ('Just "mismatchTyVarInfo") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe TyVarInfo))) :*: (S1 ('MetaSel ('Just "mismatchAmbiguityInfo") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [AmbiguityInfo]) :*: S1 ('MetaSel ('Just "mismatchCoercibleInfo") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe CoercibleMsg)))) :+: C1 ('MetaCons "FixedRuntimeRepError" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [FixedRuntimeRepErrorInfo]))))) :+: ((C1 ('MetaCons "BlockedEquality" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorItem)) :+: (C1 ('MetaCons "ExpectingMoreArguments" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Int) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TypedThing)) :+: C1 ('MetaCons "UnboundImplicitParams" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (NonEmpty ErrorItem))))) :+: ((C1 ('MetaCons "AmbiguityPreventsSolvingCt" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorItem) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ([TyVar], [TyVar]))) :+: C1 ('MetaCons "CannotResolveInstance" 'PrefixI 'True) ((S1 ('MetaSel ('Just "cannotResolve_item") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorItem) :*: (S1 ('MetaSel ('Just "cannotResolve_unifiers") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [ClsInst]) :*: S1 ('MetaSel ('Just "cannotResolve_candidates") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [ClsInst]))) :*: (S1 ('MetaSel ('Just "cannotResolve_importErrors") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [ImportError]) :*: (S1 ('MetaSel ('Just "cannotResolve_suggestions") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [GhcHint]) :*: S1 ('MetaSel ('Just "cannotResolve_relevant_bindings") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 RelevantBindings))))) :+: (C1 ('MetaCons "OverlappingInstances" 'PrefixI 'True) (S1 ('MetaSel ('Just "overlappingInstances_item") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorItem) :*: (S1 ('MetaSel ('Just "overlappingInstances_matches") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (NonEmpty ClsInst)) :*: S1 ('MetaSel ('Just "overlappingInstances_unifiers") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [ClsInst]))) :+: C1 ('MetaCons "UnsafeOverlap" 'PrefixI 'True) (S1 ('MetaSel ('Just "unsafeOverlap_item") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorItem) :*: (S1 ('MetaSel ('Just "unsafeOverlap_match") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ClsInst) :*: S1 ('MetaSel ('Just "unsafeOverlapped") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (NonEmpty ClsInst)))))))) |
data CannotUnifyVariableReason Source #
Constructors
CannotUnifyWithPolytype ErrorItem TyVar Type (Maybe TyVarInfo) | A type equality between a type variable and a polytype. Test cases: T12427a, T2846b, T10194, ... |
OccursCheck | An occurs check. |
Fields | |
SkolemEscape ErrorItem Implication [TyVar] | A skolem type variable escapes its scope. Example: data Ex where { MkEx :: a -> MkEx } foo (MkEx x) = x Test cases: TypeSkolEscape, T11142. |
DifferentTyVars TyVarInfo | Can't unify the type variable with the other type due to the kind of type variable it is. For example, trying to unify a |
RepresentationalEq TyVarInfo (Maybe CoercibleMsg) |
Instances
Generic CannotUnifyVariableReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: CannotUnifyVariableReason -> Rep CannotUnifyVariableReason x # to :: Rep CannotUnifyVariableReason x -> CannotUnifyVariableReason # | |||||
type Rep CannotUnifyVariableReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep CannotUnifyVariableReason = D1 ('MetaData "CannotUnifyVariableReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "CannotUnifyWithPolytype" 'PrefixI 'False) ((S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorItem) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TyVar)) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe TyVarInfo)))) :+: C1 ('MetaCons "OccursCheck" 'PrefixI 'True) (S1 ('MetaSel ('Just "occursCheckInterestingTyVars") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [TyVar]) :*: S1 ('MetaSel ('Just "occursCheckAmbiguityInfos") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [AmbiguityInfo]))) :+: (C1 ('MetaCons "SkolemEscape" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorItem) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Implication) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [TyVar]))) :+: (C1 ('MetaCons "DifferentTyVars" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TyVarInfo)) :+: C1 ('MetaCons "RepresentationalEq" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TyVarInfo) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe CoercibleMsg)))))) |
data MismatchMsg Source #
Constructors
BasicMismatch | Couldn't unify two types or kinds. Example: 3 + 3# -- can't match a lifted type with an unlifted type Test cases: T1396, T8263, ... |
Fields
| |
KindMismatch | A type has an unexpected kind. Test cases: T2994, T7609, ... |
Fields
| |
TypeEqMismatch | A mismatch between two types, which arose from a type equality. Test cases: T1470, tcfail212. |
Fields
| |
CouldNotDeduce | Couldn't solve some Wanted constraints using the Givens.
Used for messages such as |
Fields
|
Instances
Generic MismatchMsg Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep MismatchMsg Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep MismatchMsg = D1 ('MetaData "MismatchMsg" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "BasicMismatch" 'PrefixI 'True) ((S1 ('MetaSel ('Just "mismatch_ea") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 MismatchEA) :*: (S1 ('MetaSel ('Just "mismatch_item") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorItem) :*: S1 ('MetaSel ('Just "mismatch_ty1") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type))) :*: (S1 ('MetaSel ('Just "mismatch_ty2") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type) :*: (S1 ('MetaSel ('Just "mismatch_whenMatching") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe WhenMatching)) :*: S1 ('MetaSel ('Just "mismatch_mb_same_occ") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe SameOccInfo))))) :+: C1 ('MetaCons "KindMismatch" 'PrefixI 'True) (S1 ('MetaSel ('Just "kmismatch_what") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TypedThing) :*: (S1 ('MetaSel ('Just "kmismatch_expected") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type) :*: S1 ('MetaSel ('Just "kmismatch_actual") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type)))) :+: (C1 ('MetaCons "TypeEqMismatch" 'PrefixI 'True) (((S1 ('MetaSel ('Just "teq_mismatch_ppr_explicit_kinds") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool) :*: S1 ('MetaSel ('Just "teq_mismatch_item") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ErrorItem)) :*: (S1 ('MetaSel ('Just "teq_mismatch_ty1") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type) :*: S1 ('MetaSel ('Just "teq_mismatch_ty2") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type))) :*: ((S1 ('MetaSel ('Just "teq_mismatch_expected") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type) :*: S1 ('MetaSel ('Just "teq_mismatch_actual") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Type)) :*: (S1 ('MetaSel ('Just "teq_mismatch_what") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe TypedThing)) :*: S1 ('MetaSel ('Just "teq_mb_same_occ") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe SameOccInfo))))) :+: C1 ('MetaCons "CouldNotDeduce" 'PrefixI 'True) (S1 ('MetaSel ('Just "cnd_user_givens") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [Implication]) :*: (S1 ('MetaSel ('Just "cnd_wanted") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (NonEmpty ErrorItem)) :*: S1 ('MetaSel ('Just "cnd_extra") 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe CND_Extra)))))) |
data MismatchEA Source #
Whether to use expected/actual in a type mismatch message.
Constructors
NoEA | Don't use expected/actual. |
EA | Use expected/actual. |
Fields
|
mkPlainMismatchMsg :: MismatchMsg -> TcSolverReportMsg Source #
Report a mismatch error without any extra information.
mkBasicMismatchMsg :: MismatchEA -> ErrorItem -> Type -> Type -> MismatchMsg Source #
Construct a basic mismatch message between two types.
See pprMismatchMsg
for how such a message is displayed to users.
data WhenMatching Source #
Explain how a kind equality originated.
Constructors
WhenMatching TcType TcType CtOrigin (Maybe TypeOrKind) |
Instances
Generic WhenMatching Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep WhenMatching Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep WhenMatching = D1 ('MetaData "WhenMatching" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "WhenMatching" 'PrefixI 'False) ((S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TcType) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TcType)) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 CtOrigin) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (Maybe TypeOrKind))))) |
data ExpectedActualInfo Source #
Expected/actual information.
Constructors
ExpectedActual | Display the expected and actual types. |
Fields
| |
ExpectedActualAfterTySynExpansion | Display the expected and actual types, after expanding type synonyms. |
Fields |
A cue to print out information about type variables,
e.g. where they were bound, when there is a mismatch tv1 ~ ty2
.
Constructors
TyVarInfo | |
Fields |
data SameOccInfo Source #
Add some information to disambiguate errors in which
two Names
would otherwise appear to be identical.
See Note [Disambiguating (X ~ X) errors].
Constructors
SameOcc | |
Fields
|
data AmbiguityInfo Source #
Add some information about ambiguity
Constructors
Ambiguity | Some type variables remained ambiguous: print them to the user. |
Fields
| |
NonInjectiveTyFam TyCon | Remind the user that a particular type family is not injective. |
Additional information to be given in a CouldNotDeduce
message,
which is then passed on to mk_supplementary_ea_msg
.
Constructors
CND_Extra TypeOrKind Type Type |
data FitsMbSuppressed Source #
A collection of valid hole fits or refinement fits, in which some fits might have been suppressed.
Constructors
Fits | |
Fields
|
data ValidHoleFits Source #
A collection of hole fits and refinement fits.
Constructors
ValidHoleFits | |
Fields |
data HoleFitDispConfig Source #
Configuration for pretty-printing valid hole fits.
data RelevantBindings Source #
Constructors
RelevantBindings | |
Fields
|
pprRelevantBindings :: RelevantBindings -> SDoc Source #
Display some relevant bindings.
data PromotionErr Source #
Constructors
TyConPE | |
ClassPE | |
FamDataConPE | |
ConstrainedDataConPE ThetaType | |
PatSynPE | |
RecDataConPE | |
TermVariablePE | |
TypeVariablePE |
Instances
Outputable PromotionErr Source # | |||||
Defined in GHC.Tc.Errors.Types.PromotionErr Methods ppr :: PromotionErr -> SDoc Source # | |||||
Generic PromotionErr Source # | |||||
Defined in GHC.Tc.Errors.Types.PromotionErr Associated Types
| |||||
type Rep PromotionErr Source # | |||||
Defined in GHC.Tc.Errors.Types.PromotionErr type Rep PromotionErr = D1 ('MetaData "PromotionErr" "GHC.Tc.Errors.Types.PromotionErr" "ghc-9.10.1-25ec" 'False) (((C1 ('MetaCons "TyConPE" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ClassPE" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "FamDataConPE" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ConstrainedDataConPE" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ThetaType)))) :+: ((C1 ('MetaCons "PatSynPE" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "RecDataConPE" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "TermVariablePE" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TypeVariablePE" 'PrefixI 'False) (U1 :: Type -> Type)))) |
pprPECategory :: PromotionErr -> SDoc Source #
peCategory :: PromotionErr -> String Source #
data TermLevelUseErr Source #
Instances
Generic TermLevelUseErr Source # | |||||
Defined in GHC.Tc.Errors.Types.PromotionErr Associated Types
Methods from :: TermLevelUseErr -> Rep TermLevelUseErr x # to :: Rep TermLevelUseErr x -> TermLevelUseErr # | |||||
type Rep TermLevelUseErr Source # | |||||
Defined in GHC.Tc.Errors.Types.PromotionErr type Rep TermLevelUseErr = D1 ('MetaData "TermLevelUseErr" "GHC.Tc.Errors.Types.PromotionErr" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "TyConTE" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "ClassTE" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "TyVarTE" 'PrefixI 'False) (U1 :: Type -> Type))) |
teCategory :: TermLevelUseErr -> String Source #
data NotInScopeError Source #
Some form of "not in scope"
error. See also the OutOfScopeHole
constructor of HoleError
.
Constructors
NotInScope | A run-of-the-mill |
NotARecordField | Like |
NoExactName Name | An exact This usually indicates a problem with a Template Haskell splice. Test cases: T5971, T18263. |
SameName [GlobalRdrElt] | always at least 2 elements |
MissingBinding SDoc [GhcHint] | |
NoTopLevelBinding | Couldn't find a top-level binding. Happens when specifying an annotation for something that is not in scope. Test cases: annfail01, annfail02, annfail11. |
UnknownSubordinate SDoc | A class doesn't have a method with this name, or, a class doesn't have an associated type with this name, or, a record doesn't have a record field with this name. |
NotInScopeTc (NameEnv TcTyThing) | A name is not in scope during type checking but passed the renamer. Test cases: none |
Instances
Generic NotInScopeError Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: NotInScopeError -> Rep NotInScopeError x # to :: Rep NotInScopeError x -> NotInScopeError # | |||||
type Rep NotInScopeError Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep NotInScopeError = D1 ('MetaData "NotInScopeError" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (((C1 ('MetaCons "NotInScope" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "NotARecordField" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "NoExactName" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Name)) :+: C1 ('MetaCons "SameName" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [GlobalRdrElt])))) :+: ((C1 ('MetaCons "MissingBinding" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 SDoc) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [GhcHint])) :+: C1 ('MetaCons "NoTopLevelBinding" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "UnknownSubordinate" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 SDoc)) :+: C1 ('MetaCons "NotInScopeTc" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (NameEnv TcTyThing)))))) |
mkTcRnNotInScope :: RdrName -> NotInScopeError -> TcRnMessage Source #
Create a "not in scope"
error message for the given RdrName
.
data ImportError Source #
Explain a problem with an import.
Constructors
MissingModule ModuleName | Couldn't find a module with the requested name. |
ModulesDoNotExport (NonEmpty Module) OccName | The imported modules don't export what we're looking for. |
Instances
Outputable ImportError Source # | |
Defined in GHC.Tc.Errors.Ppr Methods ppr :: ImportError -> SDoc Source # |
Report an error involving a Hole
.
This could be an out of scope data constructor or variable, a typed hole, or a wildcard in a type.
Constructors
OutOfScopeHole [ImportError] [GhcHint] | Report an out-of-scope data constructor or variable masquerading as an expression hole. See Note [Insoluble holes] in GHC.Tc.Types.Constraint.
See Test cases: T9177a. |
HoleError HoleSort [TcTyVar] [(SkolemInfoAnon, [TcTyVar])] | Report a typed hole, or wildcard, with additional information. |
data CoercibleMsg Source #
A message that aims to explain why two types couldn't be seen to be representationally equal.
Constructors
UnknownRoles Type | Not knowing the role of a type constructor prevents us from concluding that two types are representationally equal. Example: foo :: Applicative m => m (Sum Int) foo = coerce (pure $ 1 :: Int) We don't know what role Test cases: T8984, TcCoercibleFail. |
TyConIsAbstract TyCon | The fact that a Test cases: none. |
OutOfScopeNewtypeConstructor TyCon DataCon | We can't unwrap a newtype whose constructor is not in scope. Example: import Data.Ord (Down) -- NB: not importing the constructor foo :: Int -> Down Int foo = coerce Test cases: TcCoercibleFail. |
data PotentialInstances Source #
This datatype collates instances that match or unifier, in order to report an error message for an unsolved typeclass constraint.
Constructors
PotentialInstances | |
data UnsupportedCallConvention Source #
Specifies which calling convention is unsupported on the current platform
Instances
Eq UnsupportedCallConvention Source # | |
Defined in GHC.Tc.Errors.Types Methods (==) :: UnsupportedCallConvention -> UnsupportedCallConvention -> Bool # (/=) :: UnsupportedCallConvention -> UnsupportedCallConvention -> Bool # |
type ExpectedBackends = [Backend] Source #
Specifies which back ends can handle a requested foreign import or export
data ArgOrResult Source #
Whether the error pertains to a function argument or a result.
data MatchArgsContext Source #
Context for a mismatch in the number of arguments
Constructors
EquationArgs !Name | Name of the function |
PatternArgs !HsMatchContextRn | Pattern match specifics |
data MatchArgBadMatches where Source #
The information necessary to report mismatched numbers of arguments in a match group.
Constructors
MatchArgMatches | |
Fields
|
data PragmaWarningInfo Source #
Constructors
PragmaWarningName | |
Fields | |
PragmaWarningExport | |
Fields | |
PragmaWarningInstance | |
Fields |
data EmptyStatementGroupErrReason Source #
The context for an "empty statement group" error.
Constructors
EmptyStmtsGroupInParallelComp | Empty statement group in a parallel list comprehension |
EmptyStmtsGroupInTransformListComp | Empty statement group in a transform list comprehension Example: [() | then ()] |
EmptyStmtsGroupInDoNotation HsDoFlavour | Empty statement group in do notation Example: do |
EmptyStmtsGroupInArrowNotation | Empty statement group in arrow notation Example: proc () -> do |
Instances
Generic EmptyStatementGroupErrReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep EmptyStatementGroupErrReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep EmptyStatementGroupErrReason = D1 ('MetaData "EmptyStatementGroupErrReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "EmptyStmtsGroupInParallelComp" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "EmptyStmtsGroupInTransformListComp" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "EmptyStmtsGroupInDoNotation" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 HsDoFlavour)) :+: C1 ('MetaCons "EmptyStmtsGroupInArrowNotation" 'PrefixI 'False) (U1 :: Type -> Type))) |
data UnexpectedStatement where Source #
An existential wrapper around
.StmtLR
GhcPs GhcPs body
Constructors
UnexpectedStatement :: forall body. Outputable (StmtLR GhcPs GhcPs body) => StmtLR GhcPs GhcPs body -> UnexpectedStatement |
Constructors
ClassDeclSort | |
InstanceDeclSort |
data NonStandardGuards where Source #
Constructors
NonStandardGuards :: forall body. (Outputable body, Anno (Stmt GhcRn body) ~ SrcSpanAnnA) => [LStmtLR GhcRn GhcRn body] -> NonStandardGuards |
data RuleLhsErrReason Source #
Constructors
UnboundVariable RdrName NotInScopeError | |
IllegalExpression |
data HsigShapeMismatchReason Source #
Constructors
HsigShapeSortMismatch !AvailInfo !AvailInfo | HsigShapeSortMismatch is an error indicating that an item in the export list of a signature doesn't match the item of the same name in another signature when merging the two – one is a type while the other is a plain identifier. Test cases: none |
HsigShapeNotUnifiable !Name !Name !Bool | HsigShapeNotUnifiable is an error indicating that a name in the export list of a signature cannot be unified with a name of the same name in another signature when merging the two. Test cases: bkpfail20, bkpfail21 |
Instances
Generic HsigShapeMismatchReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: HsigShapeMismatchReason -> Rep HsigShapeMismatchReason x # to :: Rep HsigShapeMismatchReason x -> HsigShapeMismatchReason # | |||||
type Rep HsigShapeMismatchReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep HsigShapeMismatchReason = D1 ('MetaData "HsigShapeMismatchReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "HsigShapeSortMismatch" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 AvailInfo) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 AvailInfo)) :+: C1 ('MetaCons "HsigShapeNotUnifiable" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Bool)))) |
data WrongThingSort Source #
data StageCheckReason Source #
Constructors
StageCheckInstance !InstanceWhat !PredType | |
StageCheckSplice !Name |
data UninferrableTyVarCtx Source #
data PatSynInvalidRhsReason Source #
Constructors
PatSynNotInvertible !(Pat GhcRn) | |
PatSynUnboundVar !Name |
Instances
Generic PatSynInvalidRhsReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: PatSynInvalidRhsReason -> Rep PatSynInvalidRhsReason x # to :: Rep PatSynInvalidRhsReason x -> PatSynInvalidRhsReason # | |||||
type Rep PatSynInvalidRhsReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep PatSynInvalidRhsReason = D1 ('MetaData "PatSynInvalidRhsReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "PatSynNotInvertible" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (Pat GhcRn))) :+: C1 ('MetaCons "PatSynUnboundVar" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name))) |
data BadFieldAnnotationReason where Source #
Constructors
LazyFieldsDisabled :: BadFieldAnnotationReason | A lazy data type field annotation (~) was used without enabling the extension StrictData. Test cases: LazyFieldsDisabled |
UnpackWithoutStrictness :: BadFieldAnnotationReason | An UNPACK pragma was applied to a field without strictness annotation (!). Test cases: T14761a, T7562 |
BackpackUnpackAbstractType :: BadFieldAnnotationReason | An UNPACK pragma was applied to an abstract type in an indefinite package in Backpack. Test cases: unpack_sums_5, T3966, T7050 |
Instances
Generic BadFieldAnnotationReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: BadFieldAnnotationReason -> Rep BadFieldAnnotationReason x # to :: Rep BadFieldAnnotationReason x -> BadFieldAnnotationReason # | |||||
type Rep BadFieldAnnotationReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep BadFieldAnnotationReason = D1 ('MetaData "BadFieldAnnotationReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "LazyFieldsDisabled" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "UnpackWithoutStrictness" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "BackpackUnpackAbstractType" 'PrefixI 'False) (U1 :: Type -> Type))) |
data SuperclassCycle Source #
Constructors
MkSuperclassCycle | |
data SuperclassCycleDetail Source #
Constructors
SCD_HeadTyVar !PredType | |
SCD_HeadTyFam !PredType | |
SCD_Superclass !Class |
data RoleValidationFailedReason Source #
Constructors
TyVarRoleMismatch !TyVar !Role | |
TyVarMissingInEnv !TyVar | |
BadCoercionRole !Coercion |
Instances
Generic RoleValidationFailedReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: RoleValidationFailedReason -> Rep RoleValidationFailedReason x # to :: Rep RoleValidationFailedReason x -> RoleValidationFailedReason # | |||||
type Rep RoleValidationFailedReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep RoleValidationFailedReason = D1 ('MetaData "RoleValidationFailedReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "TyVarRoleMismatch" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyVar) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Role)) :+: (C1 ('MetaCons "TyVarMissingInEnv" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyVar)) :+: C1 ('MetaCons "BadCoercionRole" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Coercion)))) |
data DisabledClassExtension where Source #
Constructors
MultiParamDisabled | MultiParamTypeClasses is required. Test cases: readFail037, TcNoNullaryTC |
Fields
| |
FunDepsDisabled :: DisabledClassExtension | FunctionalDependencies is required. Test cases: readFail041 |
ConstrainedClassMethodsDisabled :: !Id -> !TcPredType -> DisabledClassExtension | ConstrainedClassMethods is required. Test cases: mod39, tcfail150 |
Instances
Generic DisabledClassExtension Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: DisabledClassExtension -> Rep DisabledClassExtension x # to :: Rep DisabledClassExtension x -> DisabledClassExtension # | |||||
type Rep DisabledClassExtension Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep DisabledClassExtension = D1 ('MetaData "DisabledClassExtension" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "MultiParamDisabled" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Int)) :+: (C1 ('MetaCons "FunDepsDisabled" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ConstrainedClassMethodsDisabled" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Id) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TcPredType)))) |
data TyFamsDisabledReason Source #
Constructors
TyFamsDisabledFamily !Name | |
TyFamsDisabledInstance !TyCon |
Instances
Generic TyFamsDisabledReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: TyFamsDisabledReason -> Rep TyFamsDisabledReason x # to :: Rep TyFamsDisabledReason x -> TyFamsDisabledReason # | |||||
type Rep TyFamsDisabledReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep TyFamsDisabledReason = D1 ('MetaData "TyFamsDisabledReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "TyFamsDisabledFamily" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name)) :+: C1 ('MetaCons "TyFamsDisabledInstance" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon))) |
data TypeApplication Source #
Constructors
TypeApplication !(HsType GhcPs) !TypeOrKind | |
TypeApplicationInPattern !(HsConPatTyArg GhcPs) |
Instances
Generic TypeApplication Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: TypeApplication -> Rep TypeApplication x # to :: Rep TypeApplication x -> TypeApplication # | |||||
type Rep TypeApplication Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep TypeApplication = D1 ('MetaData "TypeApplication" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "TypeApplication" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (HsType GhcPs)) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TypeOrKind)) :+: C1 ('MetaCons "TypeApplicationInPattern" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (HsConPatTyArg GhcPs)))) |
data HsTypeOrSigType p Source #
Either `HsType p` or `HsSigType p`.
Used for reporting errors in TcRnIllegalKind
.
Instances
OutputableBndrId p => Outputable (HsTypeOrSigType (GhcPass p)) Source # | |
Defined in GHC.Tc.Errors.Types |
data HsTyVarBndrExistentialFlag Source #
A wrapper around HsTyVarBndr.
Used for reporting errors in TcRnUnusedQuantifiedTypeVar
.
Constructors
OutputableBndrFlag flag 'Renamed => HsTyVarBndrExistentialFlag (HsTyVarBndr flag GhcRn) |
Instances
Outputable HsTyVarBndrExistentialFlag Source # | |
Defined in GHC.Tc.Errors.Types Methods ppr :: HsTyVarBndrExistentialFlag -> SDoc Source # |
data BadImportKind Source #
Constructors
BadImportNotExported | Module does not export... |
Fields
| |
BadImportAvailTyCon Bool | is ExplicitNamespaces enabled?
| Trying to import a data constructor directly, e.g.
|
BadImportAvailDataCon OccName | |
BadImportNotExportedSubordinates [OccName] | The parent does not export the given children. |
BadImportAvailVar | Incorrect |
Instances
Generic BadImportKind Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep BadImportKind Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep BadImportKind = D1 ('MetaData "BadImportKind" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "BadImportNotExported" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [GhcHint])) :+: C1 ('MetaCons "BadImportAvailTyCon" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool))) :+: (C1 ('MetaCons "BadImportAvailDataCon" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 OccName)) :+: (C1 ('MetaCons "BadImportNotExportedSubordinates" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 [OccName])) :+: C1 ('MetaCons "BadImportAvailVar" 'PrefixI 'False) (U1 :: Type -> Type)))) |
data DodgyImportsReason Source #
Different types of warnings for dodgy imports.
Constructors
DodgyImportsEmptyParent !GlobalRdrElt | An import of the form 'T(..)' or 'f(..)' does not actually import anything beside
Test cases: DodgyImports |
DodgyImportsHiding !ImportLookupReason | A Test cases: DodgyImports_hiding |
Instances
Generic DodgyImportsReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: DodgyImportsReason -> Rep DodgyImportsReason x # to :: Rep DodgyImportsReason x -> DodgyImportsReason # | |||||
type Rep DodgyImportsReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep DodgyImportsReason = D1 ('MetaData "DodgyImportsReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "DodgyImportsEmptyParent" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 GlobalRdrElt)) :+: C1 ('MetaCons "DodgyImportsHiding" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 ImportLookupReason))) |
data ImportLookupReason where Source #
Different types of errors for import lookup.
Constructors
ImportLookupBad | An item in an import statement is not exported by the corresponding module. Test cases: T21826, recomp001, retc001, mod79, mod80, mod81, mod91, T6007, T7167, T9006, T11071, T9905fail2, T5385, T10668 |
Fields
| |
ImportLookupQualified | A name is specified with a qualifying module. Test cases: T3792 |
Fields
| |
ImportLookupIllegal :: ImportLookupReason | Something completely unexpected is in an import list, like Test cases: ImportLookupIllegal |
ImportLookupAmbiguous | An item in an import list matches multiple names exported from that module. Test cases: None |
Fields
|
Instances
Generic ImportLookupReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: ImportLookupReason -> Rep ImportLookupReason x # to :: Rep ImportLookupReason x -> ImportLookupReason # | |||||
type Rep ImportLookupReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep ImportLookupReason = D1 ('MetaData "ImportLookupReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "ImportLookupBad" 'PrefixI 'False) ((S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 BadImportKind) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ModIface)) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 ImpDeclSpec) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 (IE GhcPs)) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 Bool)))) :+: C1 ('MetaCons "ImportLookupQualified" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 RdrName))) :+: (C1 ('MetaCons "ImportLookupIllegal" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ImportLookupAmbiguous" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 RdrName) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 [GlobalRdrElt])))) |
data UnusedImportReason where Source #
Different types of errors for unused imports.
Constructors
UnusedImportNone :: UnusedImportReason | No names in the import list are used in the module. Test cases: overloadedrecfldsfail06, T10890_2, t22391, t22391j, T1074, prog018, mod177, rn046, rn037, T5211 |
UnusedImportSome | A set of names in the import list are not used in the module. Test cases: overloadedrecfldsfail06, T17324, mod176, T11970A, rn046, T14881, T7454, T8149, T13064 |
Fields
|
Instances
Generic UnusedImportReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: UnusedImportReason -> Rep UnusedImportReason x # to :: Rep UnusedImportReason x -> UnusedImportReason # | |||||
type Rep UnusedImportReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep UnusedImportReason = D1 ('MetaData "UnusedImportReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "UnusedImportNone" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "UnusedImportSome" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 [UnusedImportName]))) |
data UnusedImportName where Source #
Distinguish record fields from other names for pretty-printing.
Constructors
UnusedImportNameRecField :: !Parent -> !OccName -> UnusedImportName | |
UnusedImportNameRegular :: !Name -> UnusedImportName |
data NestedForallsContextsIn Source #
Different places in which a nested foralls/contexts error might occur.
Constructors
NFC_Specialize | Nested forall in |
NFC_ViaType | Nested forall in |
NFC_GadtConSig | Nested forall in the type of a GADT constructor |
NFC_InstanceHead | Nested forall in an instance head |
NFC_StandaloneDerivedInstanceHead | Nested forall in a standalone deriving instance head |
NFC_DerivedClassType | Nested forall in deriving class type |
data UnusedNameProv Source #
Provenance of an unused name.
data NonCanonicalDefinition Source #
Different reasons for TcRnNonCanonicalDefinition.
Constructors
NonCanonicalMonoid NonCanonical_Monoid | Related to |
NonCanonicalMonad NonCanonical_Monad | Related to |
Instances
Generic NonCanonicalDefinition Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: NonCanonicalDefinition -> Rep NonCanonicalDefinition x # to :: Rep NonCanonicalDefinition x -> NonCanonicalDefinition # | |||||
type Rep NonCanonicalDefinition Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep NonCanonicalDefinition = D1 ('MetaData "NonCanonicalDefinition" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "NonCanonicalMonoid" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 NonCanonical_Monoid)) :+: C1 ('MetaCons "NonCanonicalMonad" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 NonCanonical_Monad))) |
data NonCanonical_Monoid Source #
Possible cases for the -Wnoncanonical-monoid-instances.
Constructors
NonCanonical_Sappend |
|
NonCanonical_Mappend |
|
data NonCanonical_Monad Source #
Possible cases for the -Wnoncanonical-monad-instances.
Constructors
NonCanonical_Pure |
|
NonCanonical_ThenA |
|
NonCanonical_Return |
|
NonCanonical_ThenM |
|
Errors for hs-boot and signature files
data BadBootDecls Source #
What declarations were not allowed in an hs-boot or hsig file?
Constructors
BootBindsPs !(NonEmpty (LHsBindLR GhcRn GhcPs)) | |
BootBindsRn !(NonEmpty (LHsBindLR GhcRn GhcRn)) | |
BootInstanceSigs !(NonEmpty (LSig GhcRn)) | |
BootFamInst !TyCon | |
BootSpliceDecls !(NonEmpty (LocatedA (HsUntypedSplice GhcPs))) | |
BootForeignDecls !(NonEmpty (LForeignDecl GhcRn)) | |
BootDefaultDecls !(NonEmpty (LDefaultDecl GhcRn)) | |
BootRuleDecls !(NonEmpty (LRuleDecls GhcRn)) |
data MissingBootThing Source #
Something from the hs-boot or signature file is missing from the implementing module.
Constructors
MissingBootDefinition | Something defined in the hs-boot or signature file is not defined in the implementing module. |
MissingBootExport | Something exported by the hs-boot or signature file is not exported by the implementing module. |
Instances
Generic MissingBootThing Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: MissingBootThing -> Rep MissingBootThing x # to :: Rep MissingBootThing x -> MissingBootThing # | |||||
type Rep MissingBootThing Source # | |||||
missingBootThing :: HsBootOrSig -> Name -> MissingBootThing -> TcRnMessage Source #
data BootMismatch Source #
A mismatch between an hs-boot or signature file and its implementing module.
Constructors
MissingBootThing !Name !MissingBootThing | Something defined or exported by an hs-boot or signature file is missing from the implementing module. |
MissingBootInstance | A typeclass instance is declared in the hs-boot file but it is not present in the implementing module. |
BadReexportedBootThing !Name !Name | A mismatch between an hsig file and its implementing module
in the |
BootMismatch | A mismatch between the declaration of something in the hs-boot or signature file and its implementation, e.g. a type mismatch or a type family implemented as a class. |
Fields
|
Instances
Generic BootMismatch Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep BootMismatch Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep BootMismatch = D1 ('MetaData "BootMismatch" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "MissingBootThing" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 MissingBootThing)) :+: C1 ('MetaCons "MissingBootInstance" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 DFunId))) :+: (C1 ('MetaCons "BadReexportedBootThing" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name)) :+: C1 ('MetaCons "BootMismatch" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyThing) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyThing) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 BootMismatchWhat))))) |
data BootMismatchWhat Source #
A mismatch of two TyThing
s between an hs-boot or signature file
and its implementing module.
Constructors
BootMismatchedIdTypes | The |
BootMismatchedTyCons | |
Instances
Generic BootMismatchWhat Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: BootMismatchWhat -> Rep BootMismatchWhat x # to :: Rep BootMismatchWhat x -> BootMismatchWhat # | |||||
type Rep BootMismatchWhat Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep BootMismatchWhat = D1 ('MetaData "BootMismatchWhat" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "BootMismatchedIdTypes" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Id) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Id)) :+: C1 ('MetaCons "BootMismatchedTyCons" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (NonEmpty BootTyConMismatch))))) |
data BootTyConMismatch Source #
Mismatched implementation of a TyCon
in an hs-boot or signature file.
Constructors
TyConKindMismatch | The |
TyConRoleMismatch | |
TyConSynonymMismatch !Kind !Kind | |
TyConFlavourMismatch !FamTyConFlav !FamTyConFlav | The two |
TyConAxiomMismatch !(BootListMismatches CoAxBranch BootAxiomBranchMismatch) | The equations of a type family don't match. |
TyConInjectivityMismatch | The type family injectivity annotations don't match. |
TyConMismatchedData !AlgTyConRhs !AlgTyConRhs !BootDataMismatch | The |
TyConMismatchedClasses !Class !Class !BootClassMismatch | The |
TyConsVeryDifferent | The |
SynAbstractData !SynAbstractDataError | An abstract |
data BootAxiomBranchMismatch Source #
Constructors
MismatchedAxiomBinders | The quantified variables in an equation don't match. Example: the quantification of type family F a where { forall a. F a = Maybe a } |
MismatchedAxiomLHS | The LHSs of an equation don't match. |
MismatchedAxiomRHS | The RHSs of an equation don't match. |
data BootClassMismatch Source #
A mismatch in a class, between its declaration in an hs-boot or signature file, and its implementation in a source Haskell file.
Constructors
MismatchedMethods !(BootListMismatches ClassOpItem BootMethodMismatch) | The class methods don't match. |
MismatchedATs !(BootListMismatches ClassATItem BootATMismatch) | The associated types don't match. |
MismatchedFunDeps | The functional dependencies don't match. |
MismatchedSuperclasses | The superclasses don't match. |
MismatchedMinimalPragmas | The |
data BootMethodMismatch Source #
A mismatch in a class method, between its declaration in an hs-boot or signature file, and its implementation in a source Haskell file.
Constructors
MismatchedMethodNames | The class method names are different. |
MismatchedMethodTypes !Type !Type | The types of a class method are different. |
MismatchedDefaultMethods | The default method types are not compatible. |
data BootATMismatch Source #
A mismatch in an associated type of a class, between its declaration in an hs-boot or signature file, and its implementation in a source Haskell file.
Constructors
MismatchedTyConAT !BootTyConMismatch | Two associated types don't match. |
MismatchedATDefaultType | Two associated type defaults don't match. |
data BootDataMismatch Source #
A mismatch in a datatype declaration, between an hs-boot file or signature file and its implementing module.
Constructors
MismatchedNewtypeVsData | A datatype is implemented as a newtype or vice-versa. |
MismatchedConstructors !(BootListMismatches DataCon BootDataConMismatch) | The constructors don't match. |
MismatchedDatatypeContexts | The datatype contexts differ. |
data BootDataConMismatch Source #
A mismatch in a data constrcutor, between its declaration in an hs-boot file or signature file, and its implementation in a source Haskell module.
Constructors
MismatchedDataConNames | |
MismatchedDataConFixities | The fixities of the |
MismatchedDataConBangs | The strictness annotations of the |
MismatchedDataConFieldLabels | The |
MismatchedDataConTypes | The |
data SynAbstractDataError Source #
An error in the implementation of an abstract datatype using a type synonym.
Constructors
SynAbsDataTySynNotNullary | The type synony was not nullary. |
SynAbstractDataInvalidRHS !(NonEmpty Type) | The type synonym RHS contained invalid types, e.g. a type family or a forall. |
data BootListMismatch item err Source #
Utility datatype to record errors when checking compatibity between two lists of things, e.g. class methods, associated types, type family equations, etc.
Constructors
MismatchedLength | Different number of items. |
MismatchedThing !Int !item !item !err | The item at the given position in the list differs. |
type BootListMismatches item err = NonEmpty (BootListMismatch item err) Source #
Class and family instance errors
data IllegalInstanceReason Source #
Why was an instance declaration rejected?
Constructors
IllegalClassInstance | |
Fields
| |
IllegalFamilyInstance !IllegalFamilyInstanceReason | |
IllegalFamilyApplicationInInstance | |
Instances
Generic IllegalInstanceReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: IllegalInstanceReason -> Rep IllegalInstanceReason x # to :: Rep IllegalInstanceReason x -> IllegalInstanceReason # | |||||
type Rep IllegalInstanceReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep IllegalInstanceReason = D1 ('MetaData "IllegalInstanceReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "IllegalClassInstance" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TypedThing) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 IllegalClassInstanceReason)) :+: (C1 ('MetaCons "IllegalFamilyInstance" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 IllegalFamilyInstanceReason)) :+: C1 ('MetaCons "IllegalFamilyApplicationInInstance" 'PrefixI 'False) ((S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Bool)) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 [Type]))))) |
data IllegalClassInstanceReason Source #
Why was a class instance declaration rejected?
Constructors
IllegalInstanceHead !IllegalInstanceHeadReason | An illegal type at the head of the instance. |
IllegalHasFieldInstance !IllegalHasFieldInstance | An illegal HasField instance. See |
IllegalSpecialClassInstance | An illegal instance for a built-in typeclass such as
Test cases: derivingshould_failT9687 derivingshould_failT14916 polykinds/T8132 typecheckshould_failTcCoercibleFail2 typecheckshould_failT12837 typecheckshould_failT14390 |
IllegalInstanceFailsCoverageCondition !Class !CoverageProblem |
Instances
Generic IllegalClassInstanceReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: IllegalClassInstanceReason -> Rep IllegalClassInstanceReason x # to :: Rep IllegalClassInstanceReason x -> IllegalClassInstanceReason # | |||||
type Rep IllegalClassInstanceReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep IllegalClassInstanceReason = D1 ('MetaData "IllegalClassInstanceReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "IllegalInstanceHead" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 IllegalInstanceHeadReason)) :+: C1 ('MetaCons "IllegalHasFieldInstance" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 IllegalHasFieldInstance))) :+: (C1 ('MetaCons "IllegalSpecialClassInstance" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Class) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Bool)) :+: C1 ('MetaCons "IllegalInstanceFailsCoverageCondition" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Class) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 CoverageProblem)))) |
data IllegalInstanceHeadReason Source #
Why is a class instance head invalid?
Constructors
InstHeadAbstractClass !Class | An instance for an abstract class from an hs-boot or Backpack hsig file. Example:
Test cases: typecheckshould_failT13068 |
InstHeadNonClass | An instance whose head is not a class. Examples(s): instance c instance 42 instance !Show D type C1 a = (Show (a -> Bool)) instance C1 Int where Test cases: typecheckrenameT5513 typecheckrenameT16385 parsershould_failT3811c renameshould_failT18240a polykinds/T13267 derivingshould_failT23522 |
InstHeadTySynArgs | Instance head was headed by a type synonym. Example: type MyInt = Int class C a where {..} instance C MyInt where {..} Test cases: drvfail015, mod42, TidyClassKinds, tcfail139 |
InstHeadNonTyVarArgs | Instance head was not of the form Example: instance Num [Int] where {..} Test cases: mod41, mod42, tcfail044, tcfail047. |
InstHeadMultiParam | Multi-param instance without -XMultiParamTypeClasses. Example: instance C a b where {..} Test case: IllegalMultiParamInstance |
Instances
Generic IllegalInstanceHeadReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: IllegalInstanceHeadReason -> Rep IllegalInstanceHeadReason x # to :: Rep IllegalInstanceHeadReason x -> IllegalInstanceHeadReason # | |||||
type Rep IllegalInstanceHeadReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep IllegalInstanceHeadReason = D1 ('MetaData "IllegalInstanceHeadReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "InstHeadAbstractClass" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Class)) :+: C1 ('MetaCons "InstHeadNonClass" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (Maybe TyCon)))) :+: (C1 ('MetaCons "InstHeadTySynArgs" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "InstHeadNonTyVarArgs" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "InstHeadMultiParam" 'PrefixI 'False) (U1 :: Type -> Type)))) |
data IllegalHasFieldInstance Source #
Why was a HasField instance declaration rejected?
Constructors
IllegalHasFieldInstanceNotATyCon | HasField instance for a type not headed by a TyCon. Example: instance HasField a where {..} Test case: hasfieldfail03 |
IllegalHasFieldInstanceFamilyTyCon | HasField instance for a data family. Example: data family D a data instance D Int = MkDInt Char instance HasField "fld" (D Int) where {..} Test case: hasfieldfail03 |
IllegalHasFieldInstanceTyConHasField !TyCon !FieldLabelString | HasField instance for a type that already has that field. Example data T = MkT { quux :: Int } instance HasField "quux" T Int where {..} Test case: hasfieldfail03 |
IllegalHasFieldInstanceTyConHasFields | HasField instance for a type that already has fields, when the field label could potentially unify with those fields. Example: data T = MkInt { quux :: Int } instance forall (fld :: Symbol). HasField fld T Int where {..} Test case: hasfieldfail03 |
Instances
Generic IllegalHasFieldInstance Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: IllegalHasFieldInstance -> Rep IllegalHasFieldInstance x # to :: Rep IllegalHasFieldInstance x -> IllegalHasFieldInstance # | |||||
type Rep IllegalHasFieldInstance Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep IllegalHasFieldInstance = D1 ('MetaData "IllegalHasFieldInstance" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "IllegalHasFieldInstanceNotATyCon" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "IllegalHasFieldInstanceFamilyTyCon" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "IllegalHasFieldInstanceTyConHasField" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 FieldLabelString)) :+: C1 ('MetaCons "IllegalHasFieldInstanceTyConHasFields" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type)))) |
data CoverageProblem Source #
Description of an instance coverage condition failure.
Constructors
CoverageProblem | |
Fields
|
data FailedCoverageCondition Source #
Which instance coverage condition failed? Was it the liberal coverage condition?
Constructors
FailedICC | Failed the instance coverage condition (ICC) |
Fields
| |
FailedLICC | Failed the liberal instance coverage condition (LICC) |
data IllegalFamilyInstanceReason Source #
Why is a (type or data) family instance invalid?
Constructors
NotAFamilyTyCon | A top-level family instance for a Example: data D a = MkD type instance D Int = Bool Test case: indexed-typesshould_failT3092 |
Fields
| |
NotAnOpenFamilyTyCon !TyCon | A top-level (open) type family instance for a closed type family. Test cases: indexed-typesshould_failOverlap7 indexed-typesshould_failOverlap3 |
FamilyCategoryMismatch | A family instance was declared for a family of a different kind,
e.g. a data instance for a type family Test cases: T9896, SimpleFail3a |
Fields
| |
FamilyArityMismatch | A family instance was declared with a different number of arguments than expected. See Note [Oversaturated type family equations] in GHC.Tc.Validity. Test cases: TyFamArity1, TyFamArity2, T11136, Overlap4, AssocTyDef05, AssocTyDef06, T14110 |
TyFamNameMismatch | A closed type family equation used a different name than the parent family. Example: type family F a where G Int = Bool Test cases: Overlap5, T15362, T16002, T20260, T11623 |
FamInstRHSOutOfScopeTyVars | There are out-of-scope type variables in the right-hand side of an associated type or data family instance. Example: instance forall a. C Int where data instance D Int = MkD1 a Test cases: indexed-typesshould_failT5515, polykindsT9574, renameshould_fail/T18021 |
FamInstLHSUnusedBoundTyVars !(NonEmpty InvalidFamInstQTv) | the unused bound type variables |
InvalidAssoc !InvalidAssoc |
Instances
Generic IllegalFamilyInstanceReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: IllegalFamilyInstanceReason -> Rep IllegalFamilyInstanceReason x # to :: Rep IllegalFamilyInstanceReason x -> IllegalFamilyInstanceReason # | |||||
type Rep IllegalFamilyInstanceReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep IllegalFamilyInstanceReason = D1 ('MetaData "IllegalFamilyInstanceReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (((C1 ('MetaCons "NotAFamilyTyCon" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TypeOrData) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon)) :+: C1 ('MetaCons "NotAnOpenFamilyTyCon" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon))) :+: (C1 ('MetaCons "FamilyCategoryMismatch" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon)) :+: C1 ('MetaCons "FamilyArityMismatch" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Arity)))) :+: ((C1 ('MetaCons "TyFamNameMismatch" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name)) :+: C1 ('MetaCons "FamInstRHSOutOfScopeTyVars" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (Maybe (TyCon, [Type], TyVarSet))) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (NonEmpty Name)))) :+: (C1 ('MetaCons "FamInstLHSUnusedBoundTyVars" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (NonEmpty InvalidFamInstQTv))) :+: C1 ('MetaCons "InvalidAssoc" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 InvalidAssoc))))) |
data InvalidFamInstQTv Source #
A quantified type variable in a type or data family equation that is either not bound in any LHS patterns or not used in the RHS (or both).
Constructors
InvalidFamInstQTv | |
Fields
|
Instances
NamedThing InvalidFamInstQTv Source # | |
Defined in GHC.Tc.Errors.Types Methods getOccName :: InvalidFamInstQTv -> OccName Source # getName :: InvalidFamInstQTv -> Name Source # |
data InvalidFamInstQTvReason Source #
Constructors
InvalidFamInstQTvDodgy | A dodgy binder, i.e. a variable that syntactically appears in LHS patterns but only in non-injective positions. See Note [Dodgy binding sites in type family instances] in GHC.Tc.Validity. |
InvalidFamInstQTvNotBoundInPats | A quantified type variable in a type or data family equation that is not bound in any LHS patterns. |
InvalidFamInstQTvNotUsedInRHS | A quantified type variable in a type or data family equation that is not used on the RHS. |
data InvalidAssoc Source #
Constructors
InvalidAssocInstance !InvalidAssocInstance | An invalid associated family instance. See |
InvalidAssocDefault !InvalidAssocDefault | An invalid associated family default declaration. See |
Instances
Generic InvalidAssoc Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep InvalidAssoc Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep InvalidAssoc = D1 ('MetaData "InvalidAssoc" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "InvalidAssocInstance" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 InvalidAssocInstance)) :+: C1 ('MetaCons "InvalidAssocDefault" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 InvalidAssocDefault))) |
data InvalidAssocInstance Source #
The reason that an associated family instance was invalid.
Constructors
AssocInstanceMissing !Name | A class instance is missing its expected associated type/data instance. Test cases: derivingshould_compileT14094 indexed-typesshould_compileSimple2 typecheckshould_compiletc254 |
AssocInstanceNotInAClass !TyCon | A top-level instance for an associated family Example: class C a where { type T a } instance T Int = Bool Test case: indexed-typesshould_failSimpleFail7 |
AssocNotInThisClass !Class !TyCon | An associated type instance is provided for a class that doesn't have that associated type. Examples(s):
$(do d <- instanceD (cxt []) (conT ''Eq Test cases: th/T12387a |
AssocNoClassTyVar !Class !TyCon | An associated family instance does not mention any of the parent Test cases: T2888, T9167, T12867 |
AssocTyVarsDontMatch | |
Fields
|
Instances
Generic InvalidAssocInstance Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: InvalidAssocInstance -> Rep InvalidAssocInstance x # to :: Rep InvalidAssocInstance x -> InvalidAssocInstance # | |||||
type Rep InvalidAssocInstance Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep InvalidAssocInstance = D1 ('MetaData "InvalidAssocInstance" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "AssocInstanceMissing" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name)) :+: C1 ('MetaCons "AssocInstanceNotInAClass" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon))) :+: (C1 ('MetaCons "AssocNotInThisClass" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Class) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon)) :+: (C1 ('MetaCons "AssocNoClassTyVar" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Class) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon)) :+: C1 ('MetaCons "AssocTyVarsDontMatch" 'PrefixI 'False) ((S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 ForAllTyFlag) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon)) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 [Type]) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 [Type])))))) |
data InvalidAssocDefault Source #
The reason that an associated family default declaration was invalid.
Constructors
AssocDefaultNotAssoc | An associated family default declaration for something that isn't an associated family. |
AssocMultipleDefaults !Name | |
AssocDefaultBadArgs !TyCon ![Type] AssocDefaultBadArgs | Invalid arguments in an associated family instance. See |
Instances
Generic InvalidAssocDefault Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: InvalidAssocDefault -> Rep InvalidAssocDefault x # to :: Rep InvalidAssocDefault x -> InvalidAssocDefault # | |||||
type Rep InvalidAssocDefault Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep InvalidAssocDefault = D1 ('MetaData "InvalidAssocDefault" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "AssocDefaultNotAssoc" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name)) :+: (C1 ('MetaCons "AssocMultipleDefaults" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name)) :+: C1 ('MetaCons "AssocDefaultBadArgs" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 [Type]) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 AssocDefaultBadArgs))))) |
data AssocDefaultBadArgs Source #
Invalid arguments in an associated family instance declaration.
Constructors
AssocDefaultNonTyVarArg !(Type, ForAllTyFlag) | An argument which isn't a type variable in an associated family instance default declaration. |
AssocDefaultDuplicateTyVars !(NonEmpty (TyCoVar, ForAllTyFlag)) | Duplicate occurrence of a type variable in an associated family instance default declaration. |
Instances
Generic AssocDefaultBadArgs Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: AssocDefaultBadArgs -> Rep AssocDefaultBadArgs x # to :: Rep AssocDefaultBadArgs x -> AssocDefaultBadArgs # | |||||
type Rep AssocDefaultBadArgs Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep AssocDefaultBadArgs = D1 ('MetaData "AssocDefaultBadArgs" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "AssocDefaultNonTyVarArg" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (Type, ForAllTyFlag))) :+: C1 ('MetaCons "AssocDefaultDuplicateTyVars" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (NonEmpty (TyCoVar, ForAllTyFlag))))) |
Template Haskell errors
Constructors
THSyntaxError !THSyntaxError | A syntax error with Template Haskel quotes & splices.
See |
THNameError !THNameError | An error in Template Haskell involving |
THReifyError !THReifyError | An error in Template Haskell reification. See |
TypedTHError !TypedTHError | An error due to typing restrictions in Typed Template Haskell.
See |
THSpliceFailed !SpliceFailReason | An error occurred when trying to run a splice in Template Haskell.
See |
AddTopDeclsError !AddTopDeclsError | An error involving the |
IllegalStaticFormInSplice !(HsExpr GhcPs) | IllegalStaticFormInSplice is an error when a user attempts to define a static pointer in a Template Haskell splice. Example(s): Test cases: th/TH_StaticPointers02 |
FailedToLookupThInstName !Type !LookupTHInstNameErrReason | FailedToLookupThInstName is a Template Haskell error that occurrs when looking up an instance fails. Example(s): Test cases: showIfaceshould_failTHPutDocNonExistent |
AddInvalidCorePlugin | AddInvalidCorePlugin is a Template Haskell error indicating that a Core plugin being added has an invalid module due to being in the current package. Example(s): Test cases: |
Fields
| |
AddDocToNonLocalDefn !DocLoc | AddDocToNonLocalDefn is a Template Haskell error for documentation being added to a definition which is not in the current module. Example(s): Test cases: showIfaceshould_failTHPutDocExternal |
ReportCustomQuasiError | ReportCustomQuasiError is an error or warning thrown using Example(s): Test cases: |
Instances
Generic THError Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep THError Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep THError = D1 ('MetaData "THError" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (((C1 ('MetaCons "THSyntaxError" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 THSyntaxError)) :+: C1 ('MetaCons "THNameError" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 THNameError))) :+: (C1 ('MetaCons "THReifyError" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 THReifyError)) :+: (C1 ('MetaCons "TypedTHError" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TypedTHError)) :+: C1 ('MetaCons "THSpliceFailed" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 SpliceFailReason))))) :+: ((C1 ('MetaCons "AddTopDeclsError" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 AddTopDeclsError)) :+: (C1 ('MetaCons "IllegalStaticFormInSplice" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (HsExpr GhcPs))) :+: C1 ('MetaCons "FailedToLookupThInstName" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 LookupTHInstNameErrReason)))) :+: (C1 ('MetaCons "AddInvalidCorePlugin" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 String)) :+: (C1 ('MetaCons "AddDocToNonLocalDefn" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 DocLoc)) :+: C1 ('MetaCons "ReportCustomQuasiError" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Bool) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 String)))))) |
data THSyntaxError Source #
An error involving Template Haskell quotes or splices, e.g. nested quotation brackets or the use of an untyped bracket inside a typed splice.
Constructors
IllegalTHQuotes !(HsExpr GhcPs) | IllegalTHQuotes is an error that occurs when a Template Haskell quote is used without the TemplateHaskell extension enabled. Test case: T18251e |
IllegalTHSplice | IllegalTHSplice is an error that occurs when a Template Haskell splice occurs without having enabled the TemplateHaskell extension. Test cases: bkpfail01, bkpfail05, bkpfail09, bkpfail16, bkpfail35, bkpcabal06 |
NestedTHBrackets | NestedTHBrackets is an error that occurs when Template Haskell brackets are nested without any intervening splices. Example: foo = [| [| Test cases: TH_NestedSplicesFail{5,6,7,8} |
MismatchedSpliceType | MismatchedSpliceType is an error that happens when a typed bracket or splice is used inside a typed splice/bracket, or the other way around. Examples: f1 = [| $$x |]
f2 = [|| $y ||]
f3 = $$( [| Test cases: TH_NestedSplicesFail{1,2,3,4} |
Fields
| |
BadImplicitSplice | BadImplicitSplice is an error thrown when a user uses top-level implicit TH-splice without enabling the TemplateHaskell extension. Example: pure [] -- on top-level Test cases: ghciprog019prog019 ghciscriptsT1914 ghciscriptsT6106 renameshould_failT4042 renameshould_failT12146 |
Instances
Generic THSyntaxError Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep THSyntaxError Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep THSyntaxError = D1 ('MetaData "THSyntaxError" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "IllegalTHQuotes" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (HsExpr GhcPs))) :+: C1 ('MetaCons "IllegalTHSplice" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "NestedTHBrackets" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "MismatchedSpliceType" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 SpliceType) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 SpliceOrBracket)) :+: C1 ('MetaCons "BadImplicitSplice" 'PrefixI 'False) (U1 :: Type -> Type)))) |
data THNameError Source #
Constructors
NonExactName !RdrName | NonExactName is a Template Haskell error that occurs when the user
attempts to define a binder with a Example(s): Test cases: |
QuotedNameWrongStage !(HsQuote GhcPs) | QuotedNameWrongStage is an error that can happen when a (non-top-level) Name is used at a different Template Haskell stage than the stage at which it is bound. Test cases: T16976z |
Instances
Generic THNameError Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep THNameError Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep THNameError = D1 ('MetaData "THNameError" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "NonExactName" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 RdrName)) :+: C1 ('MetaCons "QuotedNameWrongStage" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (HsQuote GhcPs)))) |
data THReifyError Source #
Constructors
CannotReifyInstance !Type | CannotReifyInstance is a Template Haskell error for when an instance being reified
via Example(s): Test cases: |
CannotReifyOutOfScopeThing !Name | CannotReifyOutOfScopeThing is a Template Haskell error indicating that the given name is not in scope and therefore cannot be reified. Example(s): Test cases: th/T16976f |
CannotReifyThingNotInTypeEnv !Name | CannotReifyThingNotInTypeEnv is a Template Haskell error occurring when the given name is not in the type environment and therefore cannot be reified. Example(s): Test cases: |
NoRolesAssociatedWithThing !TcTyThing | NoRolesAssociatedWithName is a Template Haskell error for when the user tries to reify the roles of a given name but it is not something that has roles associated with it. Example(s): Test cases: |
CannotRepresentType !UnrepresentableTypeDescr !Type | CannotRepresentThing is a Template Haskell error indicating that a type cannot be reified because it does not have a representation in Template Haskell. Example(s): Test cases: |
Instances
Generic THReifyError Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep THReifyError Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep THReifyError = D1 ('MetaData "THReifyError" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "CannotReifyInstance" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type)) :+: C1 ('MetaCons "CannotReifyOutOfScopeThing" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name))) :+: (C1 ('MetaCons "CannotReifyThingNotInTypeEnv" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name)) :+: (C1 ('MetaCons "NoRolesAssociatedWithThing" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TcTyThing)) :+: C1 ('MetaCons "CannotRepresentType" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 UnrepresentableTypeDescr) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type))))) |
data TypedTHError Source #
Constructors
SplicePolymorphicLocalVar !Id | SplicePolymorphicLocalVar is the error that occurs when the expression inside typed Template Haskell brackets is a polymorphic local variable. Example(s): x = (y :: forall a. a -> a) -> [|| y ||] Test cases: quotes/T10384 |
TypedTHWithPolyType !TcType | TypedTHWithPolyType is an error that signifies the illegal use of a polytype in a typed Template Haskell expression. Example(s): bad :: (forall a. a -> a) -> () bad = $$( [|| _ -> () ||] ) Test cases: th/T11452 |
Instances
Generic TypedTHError Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep TypedTHError Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep TypedTHError = D1 ('MetaData "TypedTHError" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "SplicePolymorphicLocalVar" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Id)) :+: C1 ('MetaCons "TypedTHWithPolyType" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TcType))) |
data SpliceFailReason Source #
Constructors
SpliceThrewException | SpliceThrewException is an error that occurs when running a Template Haskell splice throws an exception. Example(s): Test cases: annotationsshould_failannfail12 perfcompilerMultiLayerModulesTH_Make perfcompilerMultiLayerModulesTH_OneShot th/T10796b th/T19470 th/T19709d th/T5358 th/T5976 th/T7276a th/T8987 th/TH_exn1 th/TH_exn2 th/TH_runIO |
Fields
| |
RunSpliceFailure !RunSpliceFailReason | RunSpliceFailure is an error indicating that a Template Haskell splice failed to be converted into a valid expression. Example(s): Test cases: th/T10828a th/T10828b th/T12478_4 th/T15270A th/T15270B th/T16895a th/T16895b th/T16895c th/T16895d th/T16895e th/T18740d th/T2597b th/T2674 th/T3395 th/T7484 th/T7667a th/TH_implicitParamsErr1 th/TH_implicitParamsErr2 th/TH_implicitParamsErr3 th/TH_invalid_add_top_decl |
Instances
Generic SpliceFailReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: SpliceFailReason -> Rep SpliceFailReason x # to :: Rep SpliceFailReason x -> SpliceFailReason # | |||||
type Rep SpliceFailReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep SpliceFailReason = D1 ('MetaData "SpliceFailReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "SpliceThrewException" 'PrefixI 'False) ((S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 SplicePhase) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 SomeException)) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 String) :*: (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (LHsExpr GhcTc)) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Bool)))) :+: C1 ('MetaCons "RunSpliceFailure" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 RunSpliceFailReason))) |
data RunSpliceFailReason Source #
Constructors
ConversionFail !ThingBeingConverted !ConversionFailReason |
Instances
Generic RunSpliceFailReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: RunSpliceFailReason -> Rep RunSpliceFailReason x # to :: Rep RunSpliceFailReason x -> RunSpliceFailReason # | |||||
type Rep RunSpliceFailReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep RunSpliceFailReason = D1 ('MetaData "RunSpliceFailReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "ConversionFail" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 ThingBeingConverted) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 ConversionFailReason))) |
data AddTopDeclsError Source #
Constructors
InvalidTopDecl !(HsDecl GhcPs) | InvalidTopDecl is a Template Haskell error occurring when one of the Example(s): Test cases: |
AddTopDeclsUnexpectedDeclarationSplice | UnexpectedDeclarationSplice is an error that occurs when a Template Haskell
splice appears inside top-level declarations added with Example(s): none Test cases: none |
AddTopDeclsRunSpliceFailure !RunSpliceFailReason |
Instances
Generic AddTopDeclsError Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: AddTopDeclsError -> Rep AddTopDeclsError x # to :: Rep AddTopDeclsError x -> AddTopDeclsError # | |||||
type Rep AddTopDeclsError Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep AddTopDeclsError = D1 ('MetaData "AddTopDeclsError" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "InvalidTopDecl" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (HsDecl GhcPs))) :+: (C1 ('MetaCons "AddTopDeclsUnexpectedDeclarationSplice" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "AddTopDeclsRunSpliceFailure" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 RunSpliceFailReason)))) |
data ConversionFailReason Source #
The reason a TH splice could not be converted to a Haskell expression
Constructors
IllegalOccName !NameSpace !String | |
SumAltArityExceeded !SumAlt !SumArity | |
IllegalSumAlt !SumAlt | |
IllegalSumArity !SumArity | |
MalformedType !TypeOrKind !Type | |
IllegalLastStatement !HsDoFlavour !(LStmt GhcPs (LHsExpr GhcPs)) | |
KindSigsOnlyAllowedOnGADTs | |
IllegalDeclaration !THDeclDescriptor !IllegalDecls | |
CannotMixGADTConsWith98Cons | |
EmptyStmtListInDoBlock | |
NonVarInInfixExpr | |
MultiWayIfWithoutAlts | |
CasesExprWithoutAlts | |
ImplicitParamsWithOtherBinds | |
InvalidCCallImpent !String | Source |
RecGadtNoCons | |
GadtNoCons | |
InvalidTypeInstanceHeader !Type | |
InvalidTyFamInstLHS !Type | |
InvalidImplicitParamBinding | |
DefaultDataInstDecl ![LDataFamInstDecl GhcPs] | |
FunBindLacksEquations !Name |
Instances
Generic ConversionFailReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: ConversionFailReason -> Rep ConversionFailReason x # to :: Rep ConversionFailReason x -> ConversionFailReason # | |||||
type Rep ConversionFailReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep ConversionFailReason = D1 ('MetaData "ConversionFailReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((((C1 ('MetaCons "IllegalOccName" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 NameSpace) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 String)) :+: C1 ('MetaCons "SumAltArityExceeded" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 SumAlt) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 SumArity))) :+: (C1 ('MetaCons "IllegalSumAlt" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 SumAlt)) :+: (C1 ('MetaCons "IllegalSumArity" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 SumArity)) :+: C1 ('MetaCons "MalformedType" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TypeOrKind) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type))))) :+: ((C1 ('MetaCons "IllegalLastStatement" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 HsDoFlavour) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 (LStmt GhcPs (LHsExpr GhcPs)))) :+: (C1 ('MetaCons "KindSigsOnlyAllowedOnGADTs" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "IllegalDeclaration" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 THDeclDescriptor) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 IllegalDecls)))) :+: (C1 ('MetaCons "CannotMixGADTConsWith98Cons" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "EmptyStmtListInDoBlock" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "NonVarInInfixExpr" 'PrefixI 'False) (U1 :: Type -> Type))))) :+: (((C1 ('MetaCons "MultiWayIfWithoutAlts" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "CasesExprWithoutAlts" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "ImplicitParamsWithOtherBinds" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "InvalidCCallImpent" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 String)) :+: C1 ('MetaCons "RecGadtNoCons" 'PrefixI 'False) (U1 :: Type -> Type)))) :+: ((C1 ('MetaCons "GadtNoCons" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "InvalidTypeInstanceHeader" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type)) :+: C1 ('MetaCons "InvalidTyFamInstLHS" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type)))) :+: (C1 ('MetaCons "InvalidImplicitParamBinding" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "DefaultDataInstDecl" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 [LDataFamInstDecl GhcPs])) :+: C1 ('MetaCons "FunBindLacksEquations" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Name))))))) |
data UnrepresentableTypeDescr Source #
Constructors
LinearInvisibleArgument | |
CoercionsInTypes |
data LookupTHInstNameErrReason Source #
Constructors
NoMatchesFound | |
CouldNotDetermineInstance |
data SplicePhase Source #
The phase in which an exception was encountered when dealing with a TH splice
Constructors
SplicePhase_Run | |
SplicePhase_CompileAndLink |
data THDeclDescriptor Source #
Label for a TH declaration
Constructors
InstanceDecl | |
WhereClause | |
LetBinding | |
LetExpression | |
ClssDecl |
data ThingBeingConverted Source #
Identifies the TH splice attempting to be converted
data IllegalDecls Source #
Constructors
IllegalDecls !(NonEmpty (LHsDecl GhcPs)) | |
IllegalFamDecls !(NonEmpty (LFamilyDecl GhcPs)) |
Zonker errors
data ZonkerMessage where Source #
Constructors
ZonkerCannotDefaultConcrete :: !FixedRuntimeRepOrigin -> ZonkerMessage | ZonkerCannotDefaultConcrete is an error occurring when a concrete type variable cannot be defaulted. Test cases: T23153 |
Instances
Generic ZonkerMessage Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
| |||||
type Rep ZonkerMessage Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep ZonkerMessage = D1 ('MetaData "ZonkerMessage" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (C1 ('MetaCons "ZonkerCannotDefaultConcrete" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 FixedRuntimeRepOrigin))) |
data IllegalForeignTypeReason Source #
Constructors
TypeCannotBeMarshaled !Type TypeCannotBeMarshaledReason | |
ForeignDynNotPtr | |
SafeHaskellMustBeInIO | |
IOResultExpected | |
UnexpectedNestedForall | |
LinearTypesNotAllowed | |
OneArgExpected | |
AtLeastOneArgExpected |
Instances
Generic IllegalForeignTypeReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: IllegalForeignTypeReason -> Rep IllegalForeignTypeReason x # to :: Rep IllegalForeignTypeReason x -> IllegalForeignTypeReason # | |||||
type Rep IllegalForeignTypeReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep IllegalForeignTypeReason = D1 ('MetaData "IllegalForeignTypeReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) (((C1 ('MetaCons "TypeCannotBeMarshaled" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'NoSourceStrictness 'DecidedLazy) (Rec0 TypeCannotBeMarshaledReason)) :+: C1 ('MetaCons "ForeignDynNotPtr" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 Type))) :+: (C1 ('MetaCons "SafeHaskellMustBeInIO" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "IOResultExpected" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "UnexpectedNestedForall" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "LinearTypesNotAllowed" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "OneArgExpected" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "AtLeastOneArgExpected" 'PrefixI 'False) (U1 :: Type -> Type)))) |
data TypeCannotBeMarshaledReason Source #
Reason why a type cannot be marshalled through the FFI.
Constructors
NotADataType | |
NewtypeDataConNotInScope !TyCon ![Type] | |
UnliftedFFITypesNeeded | |
NotABoxedMarshalableTyCon | |
ForeignLabelNotAPtr | |
NotSimpleUnliftedType | |
NotBoxedKindAny |
Instances
Generic TypeCannotBeMarshaledReason Source # | |||||
Defined in GHC.Tc.Errors.Types Associated Types
Methods from :: TypeCannotBeMarshaledReason -> Rep TypeCannotBeMarshaledReason x # to :: Rep TypeCannotBeMarshaledReason x -> TypeCannotBeMarshaledReason # | |||||
type Rep TypeCannotBeMarshaledReason Source # | |||||
Defined in GHC.Tc.Errors.Types type Rep TypeCannotBeMarshaledReason = D1 ('MetaData "TypeCannotBeMarshaledReason" "GHC.Tc.Errors.Types" "ghc-9.10.1-25ec" 'False) ((C1 ('MetaCons "NotADataType" 'PrefixI 'False) (U1 :: Type -> Type) :+: (C1 ('MetaCons "NewtypeDataConNotInScope" 'PrefixI 'False) (S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 TyCon) :*: S1 ('MetaSel ('Nothing :: Maybe Symbol) 'NoSourceUnpackedness 'SourceStrict 'DecidedStrict) (Rec0 [Type])) :+: C1 ('MetaCons "UnliftedFFITypesNeeded" 'PrefixI 'False) (U1 :: Type -> Type))) :+: ((C1 ('MetaCons "NotABoxedMarshalableTyCon" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "ForeignLabelNotAPtr" 'PrefixI 'False) (U1 :: Type -> Type)) :+: (C1 ('MetaCons "NotSimpleUnliftedType" 'PrefixI 'False) (U1 :: Type -> Type) :+: C1 ('MetaCons "NotBoxedKindAny" 'PrefixI 'False) (U1 :: Type -> Type)))) |