diff options
Diffstat (limited to 'compiler/GHC/Tc/Errors')
| -rw-r--r-- | compiler/GHC/Tc/Errors/Ppr.hs | 7 | ||||
| -rw-r--r-- | compiler/GHC/Tc/Errors/Types.hs | 12 |
2 files changed, 19 insertions, 0 deletions
diff --git a/compiler/GHC/Tc/Errors/Ppr.hs b/compiler/GHC/Tc/Errors/Ppr.hs index bf92125405..a9b1084914 100644 --- a/compiler/GHC/Tc/Errors/Ppr.hs +++ b/compiler/GHC/Tc/Errors/Ppr.hs @@ -1338,6 +1338,9 @@ instance Diagnostic TcRnMessage where TcRnSectionWithoutParentheses expr -> mkSimpleDecorated $ hang (text "A section must be enclosed in parentheses") 2 (text "thus:" <+> (parens (ppr expr))) + TcRnMissingRoleAnnotation name roles -> mkSimpleDecorated $ + hang (text "Missing role annotation" <> colon) + 2 (text "type role" <+> ppr name <+> hsep (map ppr roles)) TcRnCapturedTermName tv_name shadowed_term_names -> mkSimpleDecorated $ @@ -2547,6 +2550,8 @@ instance Diagnostic TcRnMessage where -> ErrorWithoutFlag TcRnGhciMonadLookupFail {} -> ErrorWithoutFlag + TcRnMissingRoleAnnotation{} + -> WarningWithFlag Opt_WarnMissingRoleAnnotations diagnosticHints = \case TcRnUnknownMessage m @@ -3226,6 +3231,8 @@ instance Diagnostic TcRnMessage where -> noHints TcRnGhciMonadLookupFail {} -> noHints + TcRnMissingRoleAnnotation{} + -> noHints diagnosticCode :: TcRnMessage -> Maybe DiagnosticCode diagnosticCode = constructorCode diff --git a/compiler/GHC/Tc/Errors/Types.hs b/compiler/GHC/Tc/Errors/Types.hs index 4f0d961a3d..41fa0515ee 100644 --- a/compiler/GHC/Tc/Errors/Types.hs +++ b/compiler/GHC/Tc/Errors/Types.hs @@ -4168,6 +4168,18 @@ data TcRnMessage where -> Maybe [GlobalRdrElt] -- ^ lookup result -> 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 + + -} + TcRnMissingRoleAnnotation :: Name -> [Role] -> TcRnMessage + deriving Generic -- | Things forbidden in @type data@ declarations. |