diff options
44 files changed, 387 insertions, 184 deletions
diff --git a/compiler/coreSyn/CoreLint.hs b/compiler/coreSyn/CoreLint.hs index f9cb4be3b3..f5d0f84054 100644 --- a/compiler/coreSyn/CoreLint.hs +++ b/compiler/coreSyn/CoreLint.hs @@ -284,7 +284,7 @@ displayLintResults :: DynFlags -> CoreToDo -> IO () displayLintResults dflags pass warns errs binds | not (isEmptyBag errs) - = do { log_action dflags dflags Err.SevDump noSrcSpan defaultDumpStyle + = do { log_action dflags dflags NoReason Err.SevDump noSrcSpan defaultDumpStyle (vcat [ lint_banner "errors" (ppr pass), Err.pprMessageBag errs , text "*** Offending Program ***" , pprCoreBindings binds @@ -294,7 +294,7 @@ displayLintResults dflags pass warns errs binds | not (isEmptyBag warns) , not opt_NoDebugOutput , showLintWarnings pass - = log_action dflags dflags Err.SevDump noSrcSpan defaultDumpStyle + = log_action dflags dflags NoReason Err.SevDump noSrcSpan defaultDumpStyle (lint_banner "warnings" (ppr pass) $$ Err.pprMessageBag warns) | otherwise = return () @@ -324,7 +324,8 @@ lintInteractiveExpr what hsc_env expr dflags = hsc_dflags hsc_env display_lint_err err - = do { log_action dflags dflags Err.SevDump noSrcSpan defaultDumpStyle + = do { log_action dflags dflags NoReason Err.SevDump + noSrcSpan defaultDumpStyle (vcat [ lint_banner "errors" (text what) , err , text "*** Offending Program ***" diff --git a/compiler/deSugar/Coverage.hs b/compiler/deSugar/Coverage.hs index ef21f5c4d4..479d8cdfe5 100644 --- a/compiler/deSugar/Coverage.hs +++ b/compiler/deSugar/Coverage.hs @@ -111,7 +111,7 @@ addTicksToBinds hsc_env mod mod_loc exports tyCons binds modBreaks <- mkModBreaks hsc_env mod tickCount entries when (dopt Opt_D_dump_ticked dflags) $ - log_action dflags dflags SevDump noSrcSpan defaultDumpStyle + log_action dflags dflags NoReason SevDump noSrcSpan defaultDumpStyle (pprLHsBinds binds1) return (binds1, HpcInfo tickCount hashNo, Just modBreaks) diff --git a/compiler/ghci/Debugger.hs b/compiler/ghci/Debugger.hs index 81aab36ea9..64244729c4 100644 --- a/compiler/ghci/Debugger.hs +++ b/compiler/ghci/Debugger.hs @@ -170,7 +170,7 @@ showTerm term = do -- XXX: this tries to disable logging of errors -- does this still do what it is intended to do -- with the changed error handling and logging? - let noop_log _ _ _ _ _ = return () + let noop_log _ _ _ _ _ _ = return () expr = "show " ++ showPpr dflags bname _ <- GHC.setSessionDynFlags dflags{log_action=noop_log} fhv <- liftIO $ mkFinalizedHValue hsc_env =<< mkRemoteRef val diff --git a/compiler/ghci/Linker.hs b/compiler/ghci/Linker.hs index 2b471ee0ee..4b8a322f58 100644 --- a/compiler/ghci/Linker.hs +++ b/compiler/ghci/Linker.hs @@ -235,7 +235,7 @@ withExtendedLinkEnv new_env action showLinkerState :: DynFlags -> IO () showLinkerState dflags = do pls <- readIORef v_PersistentLinkerState >>= readMVar - log_action dflags dflags SevDump noSrcSpan defaultDumpStyle + log_action dflags dflags NoReason SevDump noSrcSpan defaultDumpStyle (vcat [text "----- Linker state -----", text "Pkgs:" <+> ppr (pkgs_loaded pls), text "Objs:" <+> ppr (objs_loaded pls), @@ -374,7 +374,7 @@ classifyLdInput dflags f | isObjectFilename platform f = return (Just (Object f)) | isDynLibFilename platform f = return (Just (DLLPath f)) | otherwise = do - log_action dflags dflags SevInfo noSrcSpan defaultUserStyle + log_action dflags dflags NoReason SevInfo noSrcSpan defaultUserStyle (text ("Warning: ignoring unrecognised input `" ++ f ++ "'")) return Nothing where platform = targetPlatform dflags @@ -1397,7 +1397,12 @@ maybePutStr :: DynFlags -> String -> IO () maybePutStr dflags s = when (verbosity dflags > 1) $ do let act = log_action dflags - act dflags SevInteractive noSrcSpan defaultUserStyle (text s) + act dflags + NoReason + SevInteractive + noSrcSpan + defaultUserStyle + (text s) maybePutStrLn :: DynFlags -> String -> IO () maybePutStrLn dflags s = maybePutStr dflags (s ++ "\n") diff --git a/compiler/iface/BinIface.hs b/compiler/iface/BinIface.hs index a7246afc03..0b70e8c725 100644 --- a/compiler/iface/BinIface.hs +++ b/compiler/iface/BinIface.hs @@ -80,7 +80,14 @@ readBinIface_ :: DynFlags -> CheckHiWay -> TraceBinIFaceReading -> FilePath readBinIface_ dflags checkHiWay traceBinIFaceReading hi_path ncu = do let printer :: SDoc -> IO () printer = case traceBinIFaceReading of - TraceBinIFaceReading -> \sd -> log_action dflags dflags SevOutput noSrcSpan defaultDumpStyle sd + TraceBinIFaceReading -> \sd -> + log_action dflags + dflags + NoReason + SevOutput + noSrcSpan + defaultDumpStyle + sd QuietBinIFaceReading -> \_ -> return () wantedGot :: Outputable a => String -> a -> a -> IO () wantedGot what wanted got = diff --git a/compiler/iface/LoadIface.hs b/compiler/iface/LoadIface.hs index c044136b36..64d100f1ed 100644 --- a/compiler/iface/LoadIface.hs +++ b/compiler/iface/LoadIface.hs @@ -861,7 +861,7 @@ showIface hsc_env filename = do iface <- initTcRnIf 's' hsc_env () () $ readBinIface IgnoreHiWay TraceBinIFaceReading filename let dflags = hsc_dflags hsc_env - log_action dflags dflags SevDump noSrcSpan defaultDumpStyle (pprModIface iface) + log_action dflags dflags NoReason SevDump noSrcSpan defaultDumpStyle (pprModIface iface) pprModIface :: ModIface -> SDoc -- Show a ModIface diff --git a/compiler/main/CodeOutput.hs b/compiler/main/CodeOutput.hs index 00a0801c47..422fd4e35b 100644 --- a/compiler/main/CodeOutput.hs +++ b/compiler/main/CodeOutput.hs @@ -67,7 +67,13 @@ codeOutput dflags this_mod filenm location foreign_stubs pkg_deps cmm_stream do_lint cmm = do { showPass dflags "CmmLint" ; case cmmLint dflags cmm of - Just err -> do { log_action dflags dflags SevDump noSrcSpan defaultDumpStyle err + Just err -> do { log_action dflags + dflags + NoReason + SevDump + noSrcSpan + defaultDumpStyle + err ; ghcExit dflags 1 } Nothing -> return () diff --git a/compiler/main/DriverPipeline.hs b/compiler/main/DriverPipeline.hs index 3de94fd403..c384248ba1 100644 --- a/compiler/main/DriverPipeline.hs +++ b/compiler/main/DriverPipeline.hs @@ -1594,7 +1594,7 @@ mkExtraObj dflags extn xs mkExtraObjToLinkIntoBinary :: DynFlags -> IO FilePath mkExtraObjToLinkIntoBinary dflags = do when (gopt Opt_NoHsMain dflags && haveRtsOptsFlags dflags) $ do - log_action dflags dflags SevInfo noSrcSpan defaultUserStyle + log_action dflags dflags NoReason SevInfo noSrcSpan defaultUserStyle (text "Warning: -rtsopts and -with-rtsopts have no effect with -no-hs-main." $$ text " Call hs_init_ghc() from your main() function to set these options.") @@ -1969,7 +1969,7 @@ linkDynLibCheck :: DynFlags -> [String] -> [UnitId] -> IO () linkDynLibCheck dflags o_files dep_packages = do when (haveRtsOptsFlags dflags) $ do - log_action dflags dflags SevInfo noSrcSpan defaultUserStyle + log_action dflags dflags NoReason SevInfo noSrcSpan defaultUserStyle (text "Warning: -rtsopts and -with-rtsopts have no effect with -shared." $$ text " Call hs_init_ghc() from your main() function to set these options.") diff --git a/compiler/main/DynFlags.hs b/compiler/main/DynFlags.hs index 3d23a090e6..ebfd861237 100644 --- a/compiler/main/DynFlags.hs +++ b/compiler/main/DynFlags.hs @@ -21,7 +21,7 @@ module DynFlags ( -- * Dynamic flags and associated configuration types DumpFlag(..), GeneralFlag(..), - WarningFlag(..), + WarningFlag(..), WarnReason(..), Language(..), PlatformConstants(..), FatalMessager, LogAction, FlushOut(..), FlushErr(..), @@ -173,7 +173,7 @@ import FastString import Outputable import Foreign.C ( CInt(..) ) import System.IO.Unsafe ( unsafeDupablePerformIO ) -import {-# SOURCE #-} ErrUtils ( Severity(..), MsgDoc, mkLocMessage ) +import {-# SOURCE #-} ErrUtils ( Severity(..), MsgDoc, mkLocMessageAnn ) import System.IO.Unsafe ( unsafePerformIO ) import Data.IORef @@ -382,6 +382,7 @@ data GeneralFlag | Opt_NoLlvmMangler -- hidden flag | Opt_WarnIsError -- -Werror; makes warnings fatal + | Opt_ShowWarnGroups -- Show the group a warning belongs to | Opt_PrintExplicitForalls | Opt_PrintExplicitKinds @@ -533,6 +534,11 @@ data GeneralFlag | Opt_PackageTrust deriving (Eq, Show, Enum) +-- | Used when outputting warnings: if a reason is given, it is +-- displayed. If a warning isn't controlled by a flag, this is made +-- explicit at the point of use. +data WarnReason = NoReason | Reason !WarningFlag + data WarningFlag = -- See Note [Updating flag description in the User's Guide] Opt_WarnDuplicateExports @@ -1616,13 +1622,20 @@ interpreterDynamic dflags -------------------------------------------------------------------------- type FatalMessager = String -> IO () -type LogAction = DynFlags -> Severity -> SrcSpan -> PprStyle -> MsgDoc -> IO () + +type LogAction = DynFlags + -> WarnReason + -> Severity + -> SrcSpan + -> PprStyle + -> MsgDoc + -> IO () defaultFatalMessager :: FatalMessager defaultFatalMessager = hPutStrLn stderr defaultLogAction :: LogAction -defaultLogAction dflags severity srcSpan style msg +defaultLogAction dflags reason severity srcSpan style msg = case severity of SevOutput -> printSDoc msg style SevDump -> printSDoc (msg $$ blankLine) style @@ -1630,7 +1643,7 @@ defaultLogAction dflags severity srcSpan style msg SevInfo -> printErrs msg style SevFatal -> printErrs msg style _ -> do hPutChar stderr '\n' - printErrs (mkLocMessage severity srcSpan msg) style + printErrs message style -- careful (#2302): printErrs prints in UTF-8, -- whereas converting to string first and using -- hPutStr would just emit the low 8 bits of @@ -1638,6 +1651,19 @@ defaultLogAction dflags severity srcSpan style msg where printSDoc = defaultLogActionHPrintDoc dflags stdout printErrs = defaultLogActionHPrintDoc dflags stderr putStrSDoc = defaultLogActionHPutStrDoc dflags stdout + -- Pretty print the warning flag, if any (#10752) + message = mkLocMessageAnn flagMsg severity srcSpan msg + flagMsg = case reason of + NoReason -> Nothing + Reason flag -> (\spec -> "-W" ++ flagSpecName spec ++ flagGrp flag) <$> + flagSpecOf flag + + flagGrp flag + | gopt Opt_ShowWarnGroups dflags = + case smallestGroups flag of + [] -> "" + groups -> " (in " ++ intercalate ", " (map ("-W"++) groups) ++ ")" + | otherwise = "" defaultLogActionHPrintDoc :: DynFlags -> Handle -> SDoc -> PprStyle -> IO () defaultLogActionHPrintDoc dflags h d sty @@ -3145,6 +3171,12 @@ useInstead flag turn_on nop :: TurnOnFlag -> DynP () nop _ = return () +-- | Find the 'FlagSpec' for a 'WarningFlag'. +flagSpecOf :: WarningFlag -> Maybe (FlagSpec WarningFlag) +flagSpecOf flag = listToMaybe $ filter check wWarningFlags + where + check fs = flagSpecFlag fs == flag + -- | These @-W\<blah\>@ flags can all be reversed with @-Wno-\<blah\>@ wWarningFlags :: [FlagSpec WarningFlag] wWarningFlags = map snd wWarningFlagsDeps @@ -3344,7 +3376,8 @@ fFlagsDeps = [ flagSpec "unbox-strict-fields" Opt_UnboxStrictFields, flagSpec "vectorisation-avoidance" Opt_VectorisationAvoidance, flagSpec "vectorise" Opt_Vectorise, - flagSpec "worker-wrapper" Opt_WorkerWrapper + flagSpec "worker-wrapper" Opt_WorkerWrapper, + flagSpec "show-warning-groups" Opt_ShowWarnGroups ] -- | These @-f\<blah\>@ flags can all be reversed with @-fno-\<blah\>@ @@ -3584,7 +3617,8 @@ defaultFlags settings Opt_ProfCountEntries, Opt_RPath, Opt_SharedImplib, - Opt_SimplPreInlining + Opt_SimplPreInlining, + Opt_ShowWarnGroups ] ++ [f | (ns,f) <- optLevelFlags, 0 `elem` ns] @@ -3757,6 +3791,51 @@ removes an assertion failure. -} -- * utils/mkUserGuidePart/ -- * docs/users_guide/using-warnings.rst +-- | Warning groups. +-- +-- As all warnings are in the Weverything set, it is ignored when +-- displaying to the user which group a warning is in. +warningGroups :: [(String, [WarningFlag])] +warningGroups = + [ ("compat", minusWcompatOpts) + , ("unused-binds", unusedBindsFlags) + , ("default", standardWarnings) + , ("extra", minusWOpts) + , ("all", minusWallOpts) + , ("everything", minusWeverythingOpts) + ] + +-- | Warning group hierarchies, where there is an explicit inclusion +-- relation. +-- +-- Each inner list is a hierarchy of warning groups, ordered from +-- smallest to largest, where each group is a superset of the one +-- before it. +-- +-- Separating this from 'warningGroups' allows for multiple +-- hierarchies with no inherent relation to be defined. +-- +-- The special-case Weverything group is not included. +warningHierarchies :: [[String]] +warningHierarchies = hierarchies ++ map (:[]) rest + where + hierarchies = [["default", "extra", "all"]] + rest = filter (`notElem` "everything" : concat hierarchies) $ + map fst warningGroups + +-- | Find the smallest group in every hierarchy which a warning +-- belongs to, excluding Weverything. +smallestGroups :: WarningFlag -> [String] +smallestGroups flag = mapMaybe go warningHierarchies where + -- Because each hierarchy is arranged from smallest to largest, + -- the first group we find in a hierarchy which contains the flag + -- is the smallest. + go (group:rest) = fromMaybe (go rest) $ do + flags <- lookup group warningGroups + guard (flag `elem` flags) + pure (Just group) + go [] = Nothing + -- | Warnings enabled unless specified otherwise standardWarnings :: [WarningFlag] standardWarnings -- see Note [Documenting warning flags] diff --git a/compiler/main/ErrUtils.hs b/compiler/main/ErrUtils.hs index eafe4e802f..7e68302ba1 100644 --- a/compiler/main/ErrUtils.hs +++ b/compiler/main/ErrUtils.hs @@ -23,7 +23,7 @@ module ErrUtils ( pprLocErrMsg, printBagOfErrors, -- ** Construction - emptyMessages, mkLocMessage, makeIntoWarning, + emptyMessages, mkLocMessage, mkLocMessageAnn, makeIntoWarning, mkErrMsg, mkPlainErrMsg, mkErrDoc, mkLongErrMsg, mkWarnMsg, mkPlainWarnMsg, warnIsErrorMsg, mkLongWarnMsg, @@ -110,7 +110,8 @@ data ErrMsg = ErrMsg { errMsgDoc :: ErrDoc, -- | This has the same text as errDocImportant . errMsgDoc. errMsgShortString :: String, - errMsgSeverity :: Severity + errMsgSeverity :: Severity, + errMsgReason :: WarnReason } -- The SrcSpan is used for sorting errors into line-number order @@ -160,15 +161,18 @@ pprMessageBag :: Bag MsgDoc -> SDoc pprMessageBag msgs = vcat (punctuate blankLine (bagToList msgs)) mkLocMessage :: Severity -> SrcSpan -> MsgDoc -> MsgDoc +mkLocMessage = mkLocMessageAnn Nothing + +mkLocMessageAnn :: Maybe String -> Severity -> SrcSpan -> MsgDoc -> MsgDoc -- Always print the location, even if it is unhelpful. Error messages -- are supposed to be in a standard format, and one without a location -- would look strange. Better to say explicitly "<no location info>". -mkLocMessage severity locn msg +mkLocMessageAnn ann severity locn msg = sdocWithDynFlags $ \dflags -> let locn' = if gopt Opt_ErrorSpans dflags then ppr locn else ppr (srcSpanStart locn) - in hang (locn' <> colon <+> sev_info) 4 msg + in hang (locn' <> colon <+> sev_info <> opt_ann) 4 msg where -- Add prefixes, like Foo.hs:34: warning: -- <the warning message> @@ -178,8 +182,13 @@ mkLocMessage severity locn msg SevFatal -> text "fatal:" _ -> empty -makeIntoWarning :: ErrMsg -> ErrMsg -makeIntoWarning err = err { errMsgSeverity = SevWarning } + -- Add optional information + opt_ann = text $ maybe "" (\i -> " ["++i++"]") ann + +makeIntoWarning :: WarnReason -> ErrMsg -> ErrMsg +makeIntoWarning reason err = err + { errMsgSeverity = SevWarning + , errMsgReason = reason } -- ----------------------------------------------------------------------------- -- Collecting up messages for later ordering and printing. @@ -190,7 +199,8 @@ mk_err_msg dflags sev locn print_unqual doc , errMsgContext = print_unqual , errMsgDoc = doc , errMsgShortString = showSDoc dflags (vcat (errDocImportant doc)) - , errMsgSeverity = sev } + , errMsgSeverity = sev + , errMsgReason = NoReason } mkErrDoc :: DynFlags -> SrcSpan -> PrintUnqualified -> ErrDoc -> ErrMsg mkErrDoc dflags = mk_err_msg dflags SevError @@ -226,10 +236,11 @@ errorsFound _dflags (_warns, errs) = not (isEmptyBag errs) printBagOfErrors :: DynFlags -> Bag ErrMsg -> IO () printBagOfErrors dflags bag_of_errors = sequence_ [ let style = mkErrStyle dflags unqual - in log_action dflags dflags sev s style (formatErrDoc dflags doc) + in log_action dflags dflags reason sev s style (formatErrDoc dflags doc) | ErrMsg { errMsgSpan = s, errMsgDoc = doc, errMsgSeverity = sev, + errMsgReason = reason, errMsgContext = unqual } <- sortMsgBag (Just dflags) bag_of_errors ] @@ -283,7 +294,13 @@ doIfSet_dyn dflags flag action | gopt flag dflags = action dumpIfSet :: DynFlags -> Bool -> String -> SDoc -> IO () dumpIfSet dflags flag hdr doc | not flag = return () - | otherwise = log_action dflags dflags SevDump noSrcSpan defaultDumpStyle (mkDumpDoc hdr doc) + | otherwise = log_action dflags + dflags + NoReason + SevDump + noSrcSpan + defaultDumpStyle + (mkDumpDoc hdr doc) -- | a wrapper around 'dumpSDoc'. -- First check whether the dump flag is set @@ -359,7 +376,7 @@ dumpSDoc dflags print_unqual flag hdr doc let (doc', severity) | null hdr = (doc, SevOutput) | otherwise = (mkDumpDoc hdr doc, SevDump) - log_action dflags dflags severity noSrcSpan dump_style doc' + log_action dflags dflags NoReason severity noSrcSpan dump_style doc' -- | Choose where to put a dump file based on DynFlags @@ -416,18 +433,18 @@ ifVerbose dflags val act errorMsg :: DynFlags -> MsgDoc -> IO () errorMsg dflags msg - = log_action dflags dflags SevError noSrcSpan (defaultErrStyle dflags) msg + = log_action dflags dflags NoReason SevError noSrcSpan (defaultErrStyle dflags) msg warningMsg :: DynFlags -> MsgDoc -> IO () warningMsg dflags msg - = log_action dflags dflags SevWarning noSrcSpan (defaultErrStyle dflags) msg + = log_action dflags dflags NoReason SevWarning noSrcSpan (defaultErrStyle dflags) msg fatalErrorMsg :: DynFlags -> MsgDoc -> IO () fatalErrorMsg dflags msg = fatalErrorMsg' (log_action dflags) dflags msg fatalErrorMsg' :: LogAction -> DynFlags -> MsgDoc -> IO () fatalErrorMsg' la dflags msg = - la dflags SevFatal noSrcSpan (defaultErrStyle dflags) msg + la dflags NoReason SevFatal noSrcSpan (defaultErrStyle dflags) msg fatalErrorMsg'' :: FatalMessager -> String -> IO () fatalErrorMsg'' fm msg = fm msg @@ -458,11 +475,13 @@ printOutputForUser dflags print_unqual msg = logOutput dflags (mkUserStyle print_unqual AllTheWay) msg logInfo :: DynFlags -> PprStyle -> MsgDoc -> IO () -logInfo dflags sty msg = log_action dflags dflags SevInfo noSrcSpan sty msg +logInfo dflags sty msg + = log_action dflags dflags NoReason SevInfo noSrcSpan sty msg logOutput :: DynFlags -> PprStyle -> MsgDoc -> IO () -- ^ Like 'logInfo' but with 'SevOutput' rather then 'SevInfo' -logOutput dflags sty msg = log_action dflags dflags SevOutput noSrcSpan sty msg +logOutput dflags sty msg + = log_action dflags dflags NoReason SevOutput noSrcSpan sty msg prettyPrintGhcErrors :: ExceptionMonad m => DynFlags -> m a -> m a prettyPrintGhcErrors dflags diff --git a/compiler/main/ErrUtils.hs-boot b/compiler/main/ErrUtils.hs-boot index 31edcc05ee..b991ec4958 100644 --- a/compiler/main/ErrUtils.hs-boot +++ b/compiler/main/ErrUtils.hs-boot @@ -16,3 +16,4 @@ data Severity type MsgDoc = SDoc mkLocMessage :: Severity -> SrcSpan -> MsgDoc -> MsgDoc +mkLocMessageAnn :: Maybe String -> Severity -> SrcSpan -> MsgDoc -> MsgDoc diff --git a/compiler/main/GhcMake.hs b/compiler/main/GhcMake.hs index 7bbe4be495..1729a5bfdc 100644 --- a/compiler/main/GhcMake.hs +++ b/compiler/main/GhcMake.hs @@ -678,7 +678,7 @@ checkStability hpt sccs all_home_mods = foldl checkSCC ([],[]) sccs -- | Each module is given a unique 'LogQueue' to redirect compilation messages -- to. A 'Nothing' value contains the result of compilation, and denotes the -- end of the message queue. -data LogQueue = LogQueue !(IORef [Maybe (Severity, SrcSpan, PprStyle, MsgDoc)]) +data LogQueue = LogQueue !(IORef [Maybe (WarnReason, Severity, SrcSpan, PprStyle, MsgDoc)]) !(MVar ()) -- | The graph of modules to compile and their corresponding result 'MVar' and @@ -879,7 +879,7 @@ parUpsweep n_jobs old_hpt stable_mods cleanup sccs = do return (success_flag,ok_results) where - writeLogQueue :: LogQueue -> Maybe (Severity,SrcSpan,PprStyle,MsgDoc) -> IO () + writeLogQueue :: LogQueue -> Maybe (WarnReason,Severity,SrcSpan,PprStyle,MsgDoc) -> IO () writeLogQueue (LogQueue ref sem) msg = do atomicModifyIORef' ref $ \msgs -> (msg:msgs,()) _ <- tryPutMVar sem () @@ -888,8 +888,8 @@ parUpsweep n_jobs old_hpt stable_mods cleanup sccs = do -- The log_action callback that is used to synchronize messages from a -- worker thread. parLogAction :: LogQueue -> LogAction - parLogAction log_queue _dflags !severity !srcSpan !style !msg = do - writeLogQueue log_queue (Just (severity,srcSpan,style,msg)) + parLogAction log_queue _dflags !reason !severity !srcSpan !style !msg = do + writeLogQueue log_queue (Just (reason,severity,srcSpan,style,msg)) -- Print each message from the log_queue using the log_action from the -- session's DynFlags. @@ -902,8 +902,8 @@ parUpsweep n_jobs old_hpt stable_mods cleanup sccs = do print_loop [] = read_msgs print_loop (x:xs) = case x of - Just (severity,srcSpan,style,msg) -> do - log_action dflags dflags severity srcSpan style msg + Just (reason,severity,srcSpan,style,msg) -> do + log_action dflags dflags reason severity srcSpan style msg print_loop xs -- Exit the loop once we encounter the end marker. Nothing -> return () diff --git a/compiler/main/SysTools.hs b/compiler/main/SysTools.hs index c3436edd9e..930ba9ebba 100644 --- a/compiler/main/SysTools.hs +++ b/compiler/main/SysTools.hs @@ -1367,10 +1367,10 @@ builderMainLoop dflags filter_fn pgm real_args mb_env = do msg <- readChan chan case msg of BuildMsg msg -> do - log_action dflags dflags SevInfo noSrcSpan defaultUserStyle msg + log_action dflags dflags NoReason SevInfo noSrcSpan defaultUserStyle msg loop chan hProcess t p exitcode BuildError loc msg -> do - log_action dflags dflags SevError (mkSrcSpan loc loc) defaultUserStyle msg + log_action dflags dflags NoReason SevError (mkSrcSpan loc loc) defaultUserStyle msg loop chan hProcess t p exitcode EOF -> loop chan hProcess (t-1) p exitcode diff --git a/compiler/main/TidyPgm.hs b/compiler/main/TidyPgm.hs index df31fda16c..5bbbdb51f6 100644 --- a/compiler/main/TidyPgm.hs +++ b/compiler/main/TidyPgm.hs @@ -390,7 +390,7 @@ tidyProgram hsc_env (ModGuts { mg_module = mod -- Print one-line size info ; let cs = coreBindsStats tidy_binds ; when (dopt Opt_D_dump_core_stats dflags) - (log_action dflags dflags SevDump noSrcSpan defaultDumpStyle + (log_action dflags dflags NoReason SevDump noSrcSpan defaultDumpStyle (text "Tidy size (terms,types,coercions)" <+> ppr (moduleName mod) <> colon <+> int (cs_tm cs) diff --git a/compiler/rename/RnBinds.hs b/compiler/rename/RnBinds.hs index 33a1cb447b..2f7e808cfe 100644 --- a/compiler/rename/RnBinds.hs +++ b/compiler/rename/RnBinds.hs @@ -462,7 +462,7 @@ rnBind _ bind@(PatBind { pat_lhs = pat -- or an occurrence of, a variable on the RHS ; whenWOptM Opt_WarnUnusedPatternBinds $ when (null bndrs && not is_wild_pat) $ - addWarn $ unusedPatBindWarn bind' + addWarn (Reason Opt_WarnUnusedPatternBinds) $ unusedPatBindWarn bind' ; fvs' `seq` -- See Note [Free-variable space leak] return (bind', bndrs, all_fvs) } @@ -1104,7 +1104,7 @@ rnGRHS' ctxt rnBody (GRHS guards rhs) rnBody rhs ; unless (pattern_guards_allowed || is_standard_guard guards') - (addWarn (nonStdGuardErr guards')) + (addWarn NoReason (nonStdGuardErr guards')) ; return (GRHS guards' rhs', fvs) } where diff --git a/compiler/rename/RnEnv.hs b/compiler/rename/RnEnv.hs index 5d74d7c94f..0ecd85e3c7 100644 --- a/compiler/rename/RnEnv.hs +++ b/compiler/rename/RnEnv.hs @@ -743,7 +743,8 @@ lookup_demoted rdr_name dflags Just demoted_name | data_kinds -> do { whenWOptM Opt_WarnUntickedPromotedConstructors $ - addWarn (untickedPromConstrWarn demoted_name) + addWarn (Reason Opt_WarnUntickedPromotedConstructors) + (untickedPromConstrWarn demoted_name) ; return demoted_name } | otherwise -> unboundNameX WL_Any rdr_name suggest_dk } @@ -1068,7 +1069,8 @@ warnIfDeprecated gre@(GRE { gre_name = name, gre_imp = iss }) -- See Note [Handling of deprecations] do { iface <- loadInterfaceForName doc name ; case lookupImpDeprec iface gre of - Just txt -> addWarn (mk_msg imp_spec txt) + Just txt -> addWarn (Reason Opt_WarnWarningsDeprecations) + (mk_msg imp_spec txt) Nothing -> return () } } | otherwise = return () @@ -1738,7 +1740,9 @@ checkShadowedOccs (global_env,local_env) get_loc_occ ns -- we don't find any GREs that are in scope qualified-only complain [] = return () - complain pp_locs = addWarnAt loc (shadowedNameWarn occ pp_locs) + complain pp_locs = addWarnAt (Reason Opt_WarnNameShadowing) + loc + (shadowedNameWarn occ pp_locs) is_shadowed_gre :: GlobalRdrElt -> RnM Bool -- Returns False for record selectors that are shadowed, when @@ -2118,7 +2122,8 @@ warnUnusedLocals names = do warnUnusedLocal :: NameEnv (FieldLabelString, Name) -> Name -> RnM () warnUnusedLocal fld_env name = when (reportable name) $ - addUnusedWarning occ (nameSrcSpan name) + addUnusedWarning Opt_WarnUnusedLocalBinds + occ (nameSrcSpan name) (text "Defined but not used") where occ = case lookupNameEnv fld_env name of @@ -2132,7 +2137,7 @@ warnUnusedGRE gre@(GRE { gre_name = name, gre_lcl = lcl, gre_imp = is }) | otherwise = when (reportable name) (mapM_ warn is) where occ = greOccName gre - warn spec = addUnusedWarning occ span msg + warn spec = addUnusedWarning Opt_WarnUnusedTopBinds occ span msg where span = importSpecLoc spec pp_mod = quotes (ppr (importSpecModule spec)) @@ -2154,9 +2159,9 @@ reportable name -- from Data.Tuple | otherwise = not (startsWithUnderscore (nameOccName name)) -addUnusedWarning :: OccName -> SrcSpan -> SDoc -> RnM () -addUnusedWarning occ span msg - = addWarnAt span $ +addUnusedWarning :: WarningFlag -> OccName -> SrcSpan -> SDoc -> RnM () +addUnusedWarning flag occ span msg + = addWarnAt (Reason flag) span $ sep [msg <> colon, nest 2 $ pprNonVarNameSpace (occNameSpace occ) <+> quotes (ppr occ)] diff --git a/compiler/rename/RnNames.hs b/compiler/rename/RnNames.hs index 75191adc74..70f76b9a54 100644 --- a/compiler/rename/RnNames.hs +++ b/compiler/rename/RnNames.hs @@ -236,7 +236,8 @@ rnImportDecl this_mod _ | implicit -> return () -- Do not bleat for implicit imports | qual_only -> return () | otherwise -> whenWOptM Opt_WarnMissingImportList $ - addWarn (missingImportListWarn imp_mod_name) + addWarn (Reason Opt_WarnMissingImportList) + (missingImportListWarn imp_mod_name) iface <- loadSrcInterface doc imp_mod_name want_boot (fmap sl_fs mb_pkg) @@ -253,7 +254,8 @@ rnImportDecl this_mod -- the non-boot module depends on the compilation order, which -- is not deterministic. The hs-boot test can show this up. dflags <- getDynFlags - warnIf (want_boot && not (mi_boot iface) && isOneShot (ghcMode dflags)) + warnIf NoReason + (want_boot && not (mi_boot iface) && isOneShot (ghcMode dflags)) (warnRedundantSourceImport imp_mod_name) when (mod_safe && not (safeImportsOn dflags)) $ addErr (text "safe import can't be used as Safe Haskell isn't on!" @@ -297,7 +299,8 @@ rnImportDecl this_mod -- Complain if we import a deprecated module whenWOptM Opt_WarnWarningsDeprecations ( case (mi_warns iface) of - WarnAll txt -> addWarn $ moduleWarn imp_mod_name txt + WarnAll txt -> addWarn (Reason Opt_WarnWarningsDeprecations) + (moduleWarn imp_mod_name txt) _ -> return () ) @@ -814,11 +817,11 @@ filterImports iface decl_spec (Just (want_hiding, L l import_items)) where -- Warn when importing T(..) if T was exported abstractly emit_warning (DodgyImport n) = whenWOptM Opt_WarnDodgyImports $ - addWarn (dodgyImportWarn n) + addWarn (Reason Opt_WarnDodgyImports) (dodgyImportWarn n) emit_warning MissingImportList = whenWOptM Opt_WarnMissingImportList $ - addWarn (missingImportListItem ieRdr) + addWarn (Reason Opt_WarnMissingImportList) (missingImportListItem ieRdr) emit_warning BadImportW = whenWOptM Opt_WarnDodgyImports $ - addWarn (lookup_err_msg BadImport) + addWarn (Reason Opt_WarnDodgyImports) (lookup_err_msg BadImport) run_lookup :: IELookupM a -> TcRn (Maybe a) run_lookup m = case m of @@ -1262,7 +1265,8 @@ exports_from_avail (Just (L _ rdr_items)) rdr_env imports this_mod | (L _ (IEModuleContents (L _ mod))) <- ie_names ] , mod `elem` earlier_mods -- Duplicate export of M = do { warn_dup_exports <- woptM Opt_WarnDuplicateExports ; - warnIf warn_dup_exports (dupModuleExport mod) ; + warnIf (Reason Opt_WarnDuplicateExports) warn_dup_exports + (dupModuleExport mod) ; return acc } | otherwise @@ -1276,7 +1280,8 @@ exports_from_avail (Just (L _ rdr_items)) rdr_env imports this_mod } ; checkErr exportValid (moduleNotImported mod) - ; warnIf (warnDodgyExports && exportValid && null gre_prs) + ; warnIf (Reason Opt_WarnDodgyExports) + (warnDodgyExports && exportValid && null gre_prs) (nullModuleExport mod) ; traceRn (text "efa" <+> (ppr mod $$ ppr all_gres)) @@ -1373,7 +1378,9 @@ exports_from_avail (Just (L _ rdr_items)) rdr_env imports this_mod warnDodgyExports <- woptM Opt_WarnDodgyExports when (null gres) $ if isTyConName name - then when warnDodgyExports $ addWarn (dodgyExportWarn name) + then when warnDodgyExports $ + addWarn (Reason Opt_WarnDodgyExports) + (dodgyExportWarn name) else -- This occurs when you export T(..), but -- only import T abstractly, or T is a synonym. addErr (exportItemErr ie) @@ -1416,7 +1423,8 @@ check_occs ie occs names -- 'names' are the entities specifed by 'ie' -- by two different module exports. See ticket #4478. -> do unless (dupExport_ok name ie ie') $ do warn_dup_exports <- woptM Opt_WarnDuplicateExports - warnIf warn_dup_exports (dupExportWarn name_occ ie ie') + warnIf (Reason Opt_WarnDuplicateExports) warn_dup_exports + (dupExportWarn name_occ ie ie') return occs | otherwise -- Same occ name but different names: an error @@ -1550,7 +1558,7 @@ warnUnusedImportDecls gbl_env ; traceRn (vcat [ text "Uses:" <+> ppr uses , text "Import usage" <+> ppr usage]) ; whenWOptM Opt_WarnUnusedImports $ - mapM_ (warnUnusedImport fld_env) usage + mapM_ (warnUnusedImport Opt_WarnUnusedImports fld_env) usage ; whenGOptM Opt_D_dump_minimal_imports $ printMinimalImports usage } @@ -1570,9 +1578,15 @@ warnMissingSignatures gbl_env ; warn_pat_syns <- woptM Opt_WarnMissingPatternSynonymSignatures ; let sig_warn - | warn_only_exported = topSigWarnIfExported exports sig_ns - | warn_missing_sigs || warn_pat_syns = topSigWarn sig_ns - | otherwise = noSigWarn + | warn_only_exported + = topSigWarnIfExported Opt_WarnMissingExportedSignatures + exports sig_ns + | warn_missing_sigs + = topSigWarn Opt_WarnMissingSignatures sig_ns + | warn_pat_syns + = topSigWarn Opt_WarnMissingPatternSynonymSignatures sig_ns + | otherwise + = noSigWarn ; let binders = (if warn_pat_syns then ps_binders else []) @@ -1591,35 +1605,36 @@ type SigWarn = [(Type, Name)] -> RnM () noSigWarn :: SigWarn noSigWarn _ = return () -topSigWarnIfExported :: NameSet -> NameSet -> SigWarn -topSigWarnIfExported exported sig_ns ids - = mapM_ (topSigWarnIdIfExported exported sig_ns) ids +topSigWarnIfExported :: WarningFlag -> NameSet -> NameSet -> SigWarn +topSigWarnIfExported flag exported sig_ns ids + = mapM_ (topSigWarnIdIfExported flag exported sig_ns) ids -topSigWarnIdIfExported :: NameSet -> NameSet -> (Type, Name) -> RnM () -topSigWarnIdIfExported exported sig_ns (ty, name) +topSigWarnIdIfExported :: WarningFlag -> NameSet -> NameSet -> (Type, Name) + -> RnM () +topSigWarnIdIfExported flag exported sig_ns (ty, name) | name `elemNameSet` exported - = topSigWarnId sig_ns (ty, name) + = topSigWarnId flag sig_ns (ty, name) | otherwise = return () -topSigWarn :: NameSet -> SigWarn -topSigWarn sig_ns ids = mapM_ (topSigWarnId sig_ns) ids +topSigWarn :: WarningFlag -> NameSet -> SigWarn +topSigWarn flag sig_ns ids = mapM_ (topSigWarnId flag sig_ns) ids -topSigWarnId :: NameSet -> (Type, Name) -> RnM () +topSigWarnId :: WarningFlag -> NameSet -> (Type, Name) -> RnM () -- The NameSet is the Ids that *lack* a signature -- We have to do it this way round because there are -- lots of top-level bindings that are generated by GHC -- and that don't have signatures -topSigWarnId sig_ns (ty, name) - | name `elemNameSet` sig_ns = warnMissingSig msg (ty, name) +topSigWarnId flag sig_ns (ty, name) + | name `elemNameSet` sig_ns = warnMissingSig flag msg (ty, name) | otherwise = return () where msg = text "Top-level binding with no type signature:" -warnMissingSig :: SDoc -> (Type, Name) -> RnM () -warnMissingSig msg (ty, name) = do +warnMissingSig :: WarningFlag -> SDoc -> (Type, Name) -> RnM () +warnMissingSig flag msg (ty, name) = do tymsg <- getMsg ty - addWarnAt (getSrcSpan name) (mk_msg tymsg) + addWarnAt (Reason flag) (getSrcSpan name) (mk_msg tymsg) where mk_msg endmsg = sep [ msg, nest 2 $ pprPrefixName name <+> endmsg ] @@ -1723,9 +1738,9 @@ extendImportMap gre imp_map -- For srcSpanEnd see Note [The ImportMap] avail = availFromGRE gre -warnUnusedImport :: NameEnv (FieldLabelString, Name) -> ImportDeclUsage - -> RnM () -warnUnusedImport fld_env (L loc decl, used, unused) +warnUnusedImport :: WarningFlag -> NameEnv (FieldLabelString, Name) + -> ImportDeclUsage -> RnM () +warnUnusedImport flag fld_env (L loc decl, used, unused) | Just (False,L _ []) <- ideclHiding decl = return () -- Do not warn for 'import M()' @@ -1733,9 +1748,9 @@ warnUnusedImport fld_env (L loc decl, used, unused) , not (null hides) , pRELUDE_NAME == unLoc (ideclName decl) = return () -- Note [Do not warn about Prelude hiding] - | null used = addWarnAt loc msg1 -- Nothing used; drop entire decl + | null used = addWarnAt (Reason flag) loc msg1 -- Nothing used; drop entire decl | null unused = return () -- Everything imported is used; nop - | otherwise = addWarnAt loc msg2 -- Some imports are unused + | otherwise = addWarnAt (Reason flag) loc msg2 -- Some imports are unused where msg1 = vcat [pp_herald <+> quotes pp_mod <+> pp_not_used, nest 2 (text "except perhaps to import instances from" diff --git a/compiler/rename/RnSource.hs b/compiler/rename/RnSource.hs index 4f655090c6..f3851ba770 100644 --- a/compiler/rename/RnSource.hs +++ b/compiler/rename/RnSource.hs @@ -500,10 +500,12 @@ checkCanonicalInstances cls poly_ty mbinds = do case mbind of FunBind { fun_id = L _ name, fun_matches = mg } | name == pureAName, isAliasMG mg == Just returnMName - -> addWarnNonCanonicalMethod1 "pure" "return" + -> addWarnNonCanonicalMethod1 + Opt_WarnNonCanonicalMonadInstances "pure" "return" | name == thenAName, isAliasMG mg == Just thenMName - -> addWarnNonCanonicalMethod1 "(*>)" "(>>)" + -> addWarnNonCanonicalMethod1 + Opt_WarnNonCanonicalMonadInstances "(*>)" "(>>)" _ -> return () @@ -512,10 +514,12 @@ checkCanonicalInstances cls poly_ty mbinds = do case mbind of FunBind { fun_id = L _ name, fun_matches = mg } | name == returnMName, isAliasMG mg /= Just pureAName - -> addWarnNonCanonicalMethod2 "return" "pure" + -> addWarnNonCanonicalMethod2 + Opt_WarnNonCanonicalMonadInstances "return" "pure" | name == thenMName, isAliasMG mg /= Just thenAName - -> addWarnNonCanonicalMethod2 "(>>)" "(*>)" + -> addWarnNonCanonicalMethod2 + Opt_WarnNonCanonicalMonadInstances "(>>)" "(*>)" _ -> return () @@ -540,7 +544,9 @@ checkCanonicalInstances cls poly_ty mbinds = do case mbind of FunBind { fun_id = L _ name, fun_matches = mg } | name == failMName, isAliasMG mg == Just failMName_preMFP - -> addWarnNonCanonicalMethod1 "fail" "Control.Monad.fail" + -> addWarnNonCanonicalMethod1 + Opt_WarnNonCanonicalMonadFailInstances "fail" + "Control.Monad.fail" _ -> return () @@ -549,8 +555,9 @@ checkCanonicalInstances cls poly_ty mbinds = do case mbind of FunBind { fun_id = L _ name, fun_matches = mg } | name == failMName_preMFP, isAliasMG mg /= Just failMName - -> addWarnNonCanonicalMethod2 "fail" - "Control.Monad.Fail.fail" + -> addWarnNonCanonicalMethod2 + Opt_WarnNonCanonicalMonadFailInstances "fail" + "Control.Monad.Fail.fail" _ -> return () | otherwise = return () @@ -574,7 +581,8 @@ checkCanonicalInstances cls poly_ty mbinds = do case mbind of FunBind { fun_id = L _ name, fun_matches = mg } | name == sappendName, isAliasMG mg == Just mappendName - -> addWarnNonCanonicalMethod1 "(<>)" "mappend" + -> addWarnNonCanonicalMethod1 + Opt_WarnNonCanonicalMonoidInstances "(<>)" "mappend" _ -> return () @@ -583,7 +591,8 @@ checkCanonicalInstances cls poly_ty mbinds = do case mbind of FunBind { fun_id = L _ name, fun_matches = mg } | name == mappendName, isAliasMG mg /= Just sappendName - -> addWarnNonCanonicalMethod2NoDefault "mappend" "(<>)" + -> addWarnNonCanonicalMethod2NoDefault + Opt_WarnNonCanonicalMonoidInstances "mappend" "(<>)" _ -> return () @@ -599,8 +608,9 @@ checkCanonicalInstances cls poly_ty mbinds = do isAliasMG _ = Nothing -- got "lhs = rhs" but expected something different - addWarnNonCanonicalMethod1 lhs rhs = do - addWarn $ vcat [ text "Noncanonical" <+> + addWarnNonCanonicalMethod1 flag lhs rhs = do + addWarn (Reason flag) $ vcat + [ text "Noncanonical" <+> quotes (text (lhs ++ " = " ++ rhs)) <+> text "definition detected" , instDeclCtxt1 poly_ty @@ -610,8 +620,9 @@ checkCanonicalInstances cls poly_ty mbinds = do ] -- expected "lhs = rhs" but got something else - addWarnNonCanonicalMethod2 lhs rhs = do - addWarn $ vcat [ text "Noncanonical" <+> + addWarnNonCanonicalMethod2 flag lhs rhs = do + addWarn (Reason flag) $ vcat + [ text "Noncanonical" <+> quotes (text lhs) <+> text "definition detected" , instDeclCtxt1 poly_ty @@ -621,8 +632,9 @@ checkCanonicalInstances cls poly_ty mbinds = do ] -- like above, but method has no default impl - addWarnNonCanonicalMethod2NoDefault lhs rhs = do - addWarn $ vcat [ text "Noncanonical" <+> + addWarnNonCanonicalMethod2NoDefault flag lhs rhs = do + addWarn (Reason flag) $ vcat + [ text "Noncanonical" <+> quotes (text lhs) <+> text "definition detected" , instDeclCtxt1 poly_ty diff --git a/compiler/rename/RnTypes.hs b/compiler/rename/RnTypes.hs index 118a32b392..7e82ddc32a 100644 --- a/compiler/rename/RnTypes.hs +++ b/compiler/rename/RnTypes.hs @@ -1409,7 +1409,7 @@ warnUnusedForAll :: SDoc -> LHsTyVarBndr Name -> FreeVars -> TcM () warnUnusedForAll in_doc (L loc tv) used_names = whenWOptM Opt_WarnUnusedForalls $ unless (hsTyVarName tv `elemNameSet` used_names) $ - addWarnAt loc $ + addWarnAt (Reason Opt_WarnUnusedForalls) loc $ vcat [ text "Unused quantified type variable" <+> quotes (ppr tv) , in_doc ] diff --git a/compiler/simplCore/CoreMonad.hs b/compiler/simplCore/CoreMonad.hs index 13a7512ffa..de22e65132 100644 --- a/compiler/simplCore/CoreMonad.hs +++ b/compiler/simplCore/CoreMonad.hs @@ -825,7 +825,7 @@ msg sev doc user_sty = mkUserStyle unqual AllTheWay dump_sty = mkDumpStyle unqual ; liftIO $ - (log_action dflags) dflags sev loc sty doc } + (log_action dflags) dflags NoReason sev loc sty doc } -- | Output a String message to the screen putMsgS :: String -> CoreM () diff --git a/compiler/simplCore/SimplCore.hs b/compiler/simplCore/SimplCore.hs index 6badbf83db..1e7020e4d0 100644 --- a/compiler/simplCore/SimplCore.hs +++ b/compiler/simplCore/SimplCore.hs @@ -428,7 +428,8 @@ ruleCheckPass current_phase pat guts = do dflags <- getDynFlags vis_orphs <- getVisibleOrphanMods liftIO $ Err.showPass dflags "RuleCheck" - liftIO $ log_action dflags dflags Err.SevDump noSrcSpan defaultDumpStyle + liftIO $ log_action dflags dflags NoReason Err.SevDump noSrcSpan + defaultDumpStyle (ruleCheckProgram current_phase pat (RuleEnv rb vis_orphs) (mg_binds guts)) return guts diff --git a/compiler/simplStg/SimplStg.hs b/compiler/simplStg/SimplStg.hs index b8491fcbbe..3b636882fe 100644 --- a/compiler/simplStg/SimplStg.hs +++ b/compiler/simplStg/SimplStg.hs @@ -37,7 +37,7 @@ stg2stg dflags module_name binds ; us <- mkSplitUniqSupply 'g' ; when (dopt Opt_D_verbose_stg2stg dflags) - (log_action dflags dflags SevDump noSrcSpan defaultDumpStyle (text "VERBOSE STG-TO-STG:")) + (log_action dflags dflags NoReason SevDump noSrcSpan defaultDumpStyle (text "VERBOSE STG-TO-STG:")) ; (binds', us', ccs) <- end_pass us "Stg2Stg" ([],[],[]) binds diff --git a/compiler/typecheck/Inst.hs b/compiler/typecheck/Inst.hs index 498687efb2..ab9a4e28c7 100644 --- a/compiler/typecheck/Inst.hs +++ b/compiler/typecheck/Inst.hs @@ -639,7 +639,9 @@ newClsInst overlap_mode dfun_name tvs theta clas tys ; oflag <- getOverlapFlag overlap_mode ; let inst = mkLocalInstance dfun oflag tvs' clas tys' ; dflags <- getDynFlags - ; warnIf (isOrphan (is_orphan inst) && wopt Opt_WarnOrphans dflags) (instOrphWarn inst) + ; warnIf (Reason Opt_WarnOrphans) + (isOrphan (is_orphan inst) && wopt Opt_WarnOrphans dflags) + (instOrphWarn inst) ; return inst } instOrphWarn :: ClsInst -> SDoc diff --git a/compiler/typecheck/TcAnnotations.hs b/compiler/typecheck/TcAnnotations.hs index b80d5bd236..00dac01227 100644 --- a/compiler/typecheck/TcAnnotations.hs +++ b/compiler/typecheck/TcAnnotations.hs @@ -14,6 +14,8 @@ import {-# SOURCE #-} TcSplice ( runAnnotation ) import Module import DynFlags import Control.Monad ( when ) +#else +import DynFlags ( WarnReason(NoReason) ) #endif import HsSyn @@ -29,7 +31,7 @@ tcAnnotations :: [LAnnDecl Name] -> TcM [Annotation] -- No GHCI; emit a warning (not an error) and ignore. cf Trac #4268 tcAnnotations [] = return [] tcAnnotations anns@(L loc _ : _) - = do { setSrcSpan loc $ addWarnTc $ + = do { setSrcSpan loc $ addWarnTc NoReason $ (text "Ignoring ANN annotation" <> plural anns <> comma <+> text "because this is a stage-1 compiler or doesn't support GHCi") ; return [] } diff --git a/compiler/typecheck/TcBinds.hs b/compiler/typecheck/TcBinds.hs index 58f3761c4a..c63d7238fb 100644 --- a/compiler/typecheck/TcBinds.hs +++ b/compiler/typecheck/TcBinds.hs @@ -706,8 +706,9 @@ mkExport prag_fn qtvs theta else addErrCtxtM (mk_impedence_match_msg mono_info sel_poly_ty poly_ty) $ tcSubType_NC sig_ctxt sel_poly_ty (mkCheckExpType poly_ty) - ; warn_missing_sigs <- woptM Opt_WarnMissingLocalSignatures - ; when warn_missing_sigs $ localSigWarn poly_id mb_sig + ; warn_missing_sigs <- woptM Opt_WarnMissingLocalSigs + ; when warn_missing_sigs $ + localSigWarn Opt_WarnMissingLocalSigs poly_id mb_sig ; return (ABE { abe_wrap = wrap -- abe_wrap :: idType poly_id ~ (forall qtvs. theta => mono_ty) @@ -797,7 +798,8 @@ chooseInferredQuantifiers inferred_theta tau_tvs qtvs , ppr annotated_theta, ppr inferred_theta , ppr inferred_diff ] ; case partial_sigs of - True | warn_partial_sigs -> reportWarning msg + True | warn_partial_sigs -> + reportWarning (Reason Opt_WarnPartialTypeSignatures) msg | otherwise -> return () False -> reportError msg @@ -851,8 +853,8 @@ mk_inf_msg poly_name poly_ty tidy_env -- | Warn the user about polymorphic local binders that lack type signatures. -localSigWarn :: Id -> Maybe TcIdSigInfo -> TcM () -localSigWarn id mb_sig +localSigWarn :: WarningFlag -> Id -> Maybe TcIdSigInfo -> TcM () +localSigWarn flag id mb_sig | Just _ <- mb_sig = return () | not (isSigmaTy (idType id)) = return () | otherwise = warnMissingSignatures msg id @@ -863,7 +865,7 @@ warnMissingSignatures :: SDoc -> Id -> TcM () warnMissingSignatures msg id = do { env0 <- tcInitTidyEnv ; let (env1, tidy_ty) = tidyOpenType env0 (idType id) - ; addWarnTcM (env1, mk_msg tidy_ty) } + ; addWarnTcM (Reason flag) (env1, mk_msg tidy_ty) } where mk_msg ty = sep [ msg, nest 2 $ pprPrefixName (idName id) <+> dcolon <+> ppr ty ] @@ -1126,7 +1128,8 @@ tcSpecPrags poly_id prag_sigs is_bad_sig s = not (isSpecLSig s || isInlineLSig s) warn_discarded_sigs - = addWarnTc (hang (text "Discarding unexpected pragmas for" <+> ppr poly_id) + = addWarnTc NoReason + (hang (text "Discarding unexpected pragmas for" <+> ppr poly_id) 2 (vcat (map (ppr . getLoc) bad_sigs))) -------------- @@ -1140,7 +1143,7 @@ tcSpecPrag poly_id prag@(SpecSig fun_name hs_tys inl) -- However we want to use fun_name in the error message, since that is -- what the user wrote (Trac #8537) = addErrCtxt (spec_ctxt prag) $ - do { warnIf (not (isOverloadedTy poly_ty || isInlinePragma inl)) + do { warnIf NoReason (not (isOverloadedTy poly_ty || isInlinePragma inl)) (text "SPECIALISE pragma for non-overloaded function" <+> quotes (ppr fun_name)) -- Note [SPECIALISE pragmas] @@ -1206,7 +1209,7 @@ tcImpSpec :: (Name, Sig Name) -> TcM [TcSpecPrag] tcImpSpec (name, prag) = do { id <- tcLookupId name ; unless (isAnyInlinePragma (idInlinePragma id)) - (addWarnTc (impSpecErr name)) + (addWarnTc NoReason (impSpecErr name)) ; tcSpecPrag id prag } impSpecErr :: Name -> SDoc diff --git a/compiler/typecheck/TcClassDcl.hs b/compiler/typecheck/TcClassDcl.hs index b1baabb963..602ef64d86 100644 --- a/compiler/typecheck/TcClassDcl.hs +++ b/compiler/typecheck/TcClassDcl.hs @@ -210,7 +210,8 @@ tcDefMeth clas tyvars this_dict binds_in hs_sig_fn prag_fn ; spec_prags <- discardConstraints $ tcSpecPrags global_dm_id prags - ; warnTc (not (null spec_prags)) + ; warnTc NoReason + (not (null spec_prags)) (text "Ignoring SPECIALISE pragmas on default method" <+> quotes (ppr sel_name)) @@ -280,7 +281,7 @@ tcClassMinimalDef _clas sigs op_info -- class ops without default methods are required, since we -- have no way to fill them in otherwise whenIsJust (isUnsatisfied (mindef `impliesAtom`) defMindef) $ - (\bf -> addWarnTc (warningMinimalDefIncomplete bf)) + (\bf -> addWarnTc NoReason (warningMinimalDefIncomplete bf)) return mindef where -- By default require all methods without a default @@ -487,7 +488,7 @@ warnMissingAT :: Name -> TcM () warnMissingAT name = do { warn <- woptM Opt_WarnMissingMethods ; traceTc "warn" (ppr name <+> ppr warn) - ; warnTc warn -- Warn only if -Wmissing-methods + ; warnTc (Reason Opt_WarnMissingMethods) warn -- Warn only if -Wmissing-methods (text "No explicit" <+> text "associated type" <+> text "or default declaration for " <+> quotes (ppr name)) } diff --git a/compiler/typecheck/TcDeriv.hs b/compiler/typecheck/TcDeriv.hs index c2b344dd77..e98ca8852d 100644 --- a/compiler/typecheck/TcDeriv.hs +++ b/compiler/typecheck/TcDeriv.hs @@ -559,7 +559,7 @@ deriveStandalone (L loc (DerivDecl deriv_ty overlap_mode)) warnUselessTypeable :: TcM () warnUselessTypeable = do { warn <- woptM Opt_WarnDerivingTypeable - ; when warn $ addWarnTc + ; when warn $ addWarnTc (Reason Opt_WarnDerivingTypeable) $ text "Deriving" <+> quotes (ppr typeableClassName) <+> text "has no effect: all types now auto-derive Typeable" } @@ -1499,7 +1499,8 @@ mkNewTypeEqn dflags overlap_mode tvs -- CanDerive/DerivableViaInstance _ -> do when (newtype_deriving && deriveAnyClass) $ - addWarnTc (sep [ text "Both DeriveAnyClass and GeneralizedNewtypeDeriving are enabled" + addWarnTc NoReason + (sep [ text "Both DeriveAnyClass and GeneralizedNewtypeDeriving are enabled" , text "Defaulting to the DeriveAnyClass strategy for instantiating" <+> ppr cls ]) go_for_it where diff --git a/compiler/typecheck/TcErrors.hs b/compiler/typecheck/TcErrors.hs index daae2021e8..af95960a4d 100644 --- a/compiler/typecheck/TcErrors.hs +++ b/compiler/typecheck/TcErrors.hs @@ -342,13 +342,13 @@ warnRedundantConstraints ctxt env info ev_vars addErrCtxt (text "In" <+> ppr info) $ do { env <- getLclEnv ; msg <- mkErrorReport ctxt env (important doc) - ; reportWarning msg } + ; reportWarning NoReason msg } | otherwise -- But for InstSkol there already *is* a surrounding -- "In the instance declaration for Eq [a]" context -- and we don't want to say it twice. Seems a bit ad-hoc = do { msg <- mkErrorReport ctxt env (important doc) - ; reportWarning msg } + ; reportWarning NoReason msg } where doc = text "Redundant constraint" <> plural redundant_evs <> colon <+> pprEvVarTheta redundant_evs @@ -572,8 +572,9 @@ reportGroup mk_err ctxt cts = case partition isMonadFailInstanceMissing cts of -- Only warn about missing MonadFail constraint when -- there are no other missing contstraints! - (monadFailCts, []) -> do { err <- mk_err ctxt monadFailCts - ; reportWarning err } + (monadFailCts, []) -> + do { err <- mk_err ctxt monadFailCts + ; reportWarning (Reason Opt_WarnMissingMonadFailInstances) err } (_, cts') -> do { err <- mk_err ctxt cts' ; maybeReportError ctxt err @@ -597,7 +598,7 @@ maybeReportHoleError ctxt ct err -- only if -fwarn_partial_type_signatures is on case cec_type_holes ctxt of HoleError -> reportError err - HoleWarn -> reportWarning err + HoleWarn -> reportWarning (Reason Opt_WarnPartialTypeSignatures) err HoleDefer -> return () -- Otherwise this is a typed hole in an expression @@ -605,7 +606,7 @@ maybeReportHoleError ctxt ct err = -- If deferring, report a warning only if -Wtyped-holds is on case cec_expr_holes ctxt of HoleError -> reportError err - HoleWarn -> reportWarning err + HoleWarn -> reportWarning (Reason Opt_WarnTypedHoles) err HoleDefer -> return () maybeReportError :: ReportErrCtxt -> ErrMsg -> TcM () @@ -615,12 +616,12 @@ maybeReportError ctxt err = return () -- so suppress this error/warning | cec_errors_as_warns ctxt - = reportWarning err + = reportWarning NoReason err | otherwise = case cec_defer_type_errors ctxt of TypeDefer -> return () - TypeWarn -> reportWarning err + TypeWarn -> reportWarning NoReason err TypeError -> reportError err addDeferredBinding :: ReportErrCtxt -> ErrMsg -> Ct -> TcM () @@ -2342,7 +2343,7 @@ warnDefaulting wanteds default_ty , quotes (ppr default_ty) ]) 2 ppr_wanteds - ; setCtLocM loc $ warnTc warn_default warn_msg } + ; setCtLocM loc $ warnTc (Reason Opt_WarnTypeDefaults) warn_default warn_msg } {- Note [Runtime skolems] diff --git a/compiler/typecheck/TcExpr.hs b/compiler/typecheck/TcExpr.hs index b98e1de3fd..a2b6bfc063 100644 --- a/compiler/typecheck/TcExpr.hs +++ b/compiler/typecheck/TcExpr.hs @@ -2227,7 +2227,8 @@ checkMissingFields con_like rbinds warn <- woptM Opt_WarnMissingFields unless (not (warn && notNull missing_ns_fields)) - (warnTc True (missingFields con_like missing_ns_fields)) + (warnTc (Reason Opt_WarnMissingFields) True + (missingFields con_like missing_ns_fields)) where missing_s_fields diff --git a/compiler/typecheck/TcForeign.hs b/compiler/typecheck/TcForeign.hs index bc3a9283c6..cb4c9ce385 100644 --- a/compiler/typecheck/TcForeign.hs +++ b/compiler/typecheck/TcForeign.hs @@ -349,7 +349,8 @@ checkMissingAmpersand :: DynFlags -> [Type] -> Type -> TcM () checkMissingAmpersand dflags arg_tys res_ty | null arg_tys && isFunPtrTy res_ty && wopt Opt_WarnDodgyForeignImports dflags - = addWarn (text "possible missing & in foreign import of FunPtr") + = addWarn (Reason Opt_WarnDodgyForeignImports) + (text "possible missing & in foreign import of FunPtr") | otherwise = return () @@ -522,7 +523,8 @@ checkCConv StdCallConv = do dflags <- getDynFlags then return StdCallConv else do -- This is a warning, not an error. see #3336 when (wopt Opt_WarnUnsupportedCallingConventions dflags) $ - addWarnTc (text "the 'stdcall' calling convention is unsupported on this platform," $$ text "treating as ccall") + addWarnTc (Reason Opt_WarnUnsupportedCallingConventions) + (text "the 'stdcall' calling convention is unsupported on this platform," $$ text "treating as ccall") return CCallConv checkCConv PrimCallConv = do addErrTc (text "The `prim' calling convention can only be used with `foreign import'") return PrimCallConv diff --git a/compiler/typecheck/TcInstDcls.hs b/compiler/typecheck/TcInstDcls.hs index 460089e457..9da27bfcd3 100644 --- a/compiler/typecheck/TcInstDcls.hs +++ b/compiler/typecheck/TcInstDcls.hs @@ -447,7 +447,7 @@ tcInstDecls1 tycl_decls inst_decls deriv_decls if isHsBootOrSig (tcg_src env) then do warn <- woptM Opt_WarnDerivingTypeable - when warn $ addWarnTc $ vcat + when warn $ addWarnTc (Reason Opt_WarnDerivingTypeable) $ vcat [ ppTypeable <+> text "instances in .hs-boot files are ignored" , text "This warning will become an error in future versions of the compiler" ] @@ -1571,7 +1571,7 @@ derivBindCtxt sel_id clas tys warnUnsatisfiedMinimalDefinition :: ClassMinimalDef -> TcM () warnUnsatisfiedMinimalDefinition mindef = do { warn <- woptM Opt_WarnMissingMethods - ; warnTc warn message + ; warnTc (Reason Opt_WarnMissingMethods) warn message } where message = vcat [text "No explicit implementation for" diff --git a/compiler/typecheck/TcMatches.hs b/compiler/typecheck/TcMatches.hs index 5f3bc5b73a..b96746d85f 100644 --- a/compiler/typecheck/TcMatches.hs +++ b/compiler/typecheck/TcMatches.hs @@ -975,7 +975,9 @@ emitMonadFailConstraint pat res_ty ; return () } warnRebindableClash :: LPat TcId -> TcRn () -warnRebindableClash pattern = addWarnAt (getLoc pattern) +warnRebindableClash pattern = addWarnAt + (Reason Opt_WarnMissingMonadFailInstances) + (getLoc pattern) (text "The failable pattern" <+> quotes (ppr pattern) $$ nest 2 (text "is used together with -XRebindableSyntax." diff --git a/compiler/typecheck/TcPat.hs b/compiler/typecheck/TcPat.hs index bd769bfe29..95946460e1 100644 --- a/compiler/typecheck/TcPat.hs +++ b/compiler/typecheck/TcPat.hs @@ -219,7 +219,8 @@ addInlinePrags poly_id prags warn_multiple_inlines inl2 inls | otherwise = setSrcSpan loc $ - addWarnTc (hang (text "Multiple INLINE pragmas for" <+> ppr poly_id) + addWarnTc NoReason + (hang (text "Multiple INLINE pragmas for" <+> ppr poly_id) 2 (vcat (text "Ignoring all but the first" : map pp_inl (inl1:inl2:inls)))) diff --git a/compiler/typecheck/TcRnDriver.hs b/compiler/typecheck/TcRnDriver.hs index a2a04e9bde..93da03f754 100644 --- a/compiler/typecheck/TcRnDriver.hs +++ b/compiler/typecheck/TcRnDriver.hs @@ -310,7 +310,8 @@ tcRnModuleTcRnM hsc_env hsc_src implicit_prelude import_decls } ; whenWOptM Opt_WarnImplicitPrelude $ - when (notNull prel_imports) $ addWarn (implicitPreludeWarn) ; + when (notNull prel_imports) $ + addWarn (Reason Opt_WarnImplicitPrelude) (implicitPreludeWarn) ; tcg_env <- {-# SCC "tcRnImports" #-} tcRnImports hsc_env (prel_imports ++ import_decls) ; @@ -1286,7 +1287,7 @@ tcPreludeClashWarn warnFlag name = do ; traceTc "tcPreludeClashWarn/prelude_functions" (hang (ppr name) 4 (sep [ppr clashingElts])) - ; let warn_msg x = addWarnAt (nameSrcSpan (gre_name x)) (hsep + ; let warn_msg x = addWarnAt (Reason warnFlag) (nameSrcSpan (gre_name x)) (hsep [ text "Local definition of" , (quotes . ppr . nameOccName . gre_name) x , text "clashes with a future Prelude name." ] @@ -1397,7 +1398,7 @@ tcMissingParentClassWarn warnFlag isName shouldName -- <should>" e.g. "Foo is an instance of Monad but not Applicative" ; let instLoc = srcLocSpan . nameSrcLoc $ getName isInst warnMsg (Just name:_) = - addWarnAt instLoc $ + addWarnAt (Reason warnFlag) instLoc $ hsep [ (quotes . ppr . nameOccName) name , text "is an instance of" , (ppr . nameOccName . className) isClass diff --git a/compiler/typecheck/TcRnMonad.hs b/compiler/typecheck/TcRnMonad.hs index 8cf0d748e3..77ad2ac071 100644 --- a/compiler/typecheck/TcRnMonad.hs +++ b/compiler/typecheck/TcRnMonad.hs @@ -719,9 +719,10 @@ checkErr :: Bool -> MsgDoc -> TcRn () -- Add the error if the bool is False checkErr ok msg = unless ok (addErr msg) -warnIf :: Bool -> MsgDoc -> TcRn () -warnIf True msg = addWarn msg -warnIf False _ = return () +-- | Display a warning if a condition is met. +warnIf :: WarnReason -> Bool -> MsgDoc -> TcRn () +warnIf reason True msg = addWarn reason msg +warnIf _ False _ = return () addMessages :: Messages -> TcRn () addMessages msgs1 @@ -777,9 +778,9 @@ reportError err (warns, errs) <- readTcRef errs_var ; writeTcRef errs_var (warns, errs `snocBag` err) } -reportWarning :: ErrMsg -> TcRn () -reportWarning err - = do { let warn = makeIntoWarning err +reportWarning :: WarnReason -> ErrMsg -> TcRn () +reportWarning reason err + = do { let warn = makeIntoWarning reason err -- 'err' was built by mkLongErrMsg or something like that, -- so it's of error severity. For a warning we downgrade -- its severity to SevWarning @@ -1081,44 +1082,54 @@ failIfTcM True err = failWithTcM err -- Warnings have no 'M' variant, nor failure -warnTc :: Bool -> MsgDoc -> TcM () -warnTc warn_if_true warn_msg - | warn_if_true = addWarnTc warn_msg +-- | Display a warning if a condition is met. +warnTc :: WarnReason -> Bool -> MsgDoc -> TcM () +warnTc reason warn_if_true warn_msg + | warn_if_true = addWarnTc reason warn_msg | otherwise = return () -warnTcM :: Bool -> (TidyEnv, MsgDoc) -> TcM () -warnTcM warn_if_true warn_msg - | warn_if_true = addWarnTcM warn_msg +-- | Display a warning if a condition is met. +warnTcM :: WarnReason -> Bool -> (TidyEnv, MsgDoc) -> TcM () +warnTcM reason warn_if_true warn_msg + | warn_if_true = addWarnTcM reason warn_msg | otherwise = return () -addWarnTc :: MsgDoc -> TcM () -addWarnTc msg = do { env0 <- tcInitTidyEnv - ; addWarnTcM (env0, msg) } +-- | Display a warning in the current context. +addWarnTc :: WarnReason -> MsgDoc -> TcM () +addWarnTc reason msg + = do { env0 <- tcInitTidyEnv ; + addWarnTcM reason (env0, msg) } -addWarnTcM :: (TidyEnv, MsgDoc) -> TcM () -addWarnTcM (env0, msg) +-- | Display a warning in a given context. +addWarnTcM :: WarnReason -> (TidyEnv, MsgDoc) -> TcM () +addWarnTcM reason (env0, msg) = do { ctxt <- getErrCtxt ; err_info <- mkErrInfo env0 ctxt ; - add_warn msg err_info } + add_warn reason msg err_info } -addWarn :: MsgDoc -> TcRn () -addWarn msg = add_warn msg Outputable.empty +-- | Display a warning for the current source location. +addWarn :: WarnReason -> MsgDoc -> TcRn () +addWarn reason msg = add_warn reason msg Outputable.empty -addWarnAt :: SrcSpan -> MsgDoc -> TcRn () -addWarnAt loc msg = add_warn_at loc msg Outputable.empty +-- | Display a warning for a given source location. +addWarnAt :: WarnReason -> SrcSpan -> MsgDoc -> TcRn () +addWarnAt reason loc msg = add_warn_at reason loc msg Outputable.empty -add_warn :: MsgDoc -> MsgDoc -> TcRn () -add_warn msg extra_info +-- | Display a warning, with an optional flag, for the current source +-- location. +add_warn :: WarnReason -> MsgDoc -> MsgDoc -> TcRn () +add_warn reason msg extra_info = do { loc <- getSrcSpanM - ; add_warn_at loc msg extra_info } + ; add_warn_at reason loc msg extra_info } -add_warn_at :: SrcSpan -> MsgDoc -> MsgDoc -> TcRn () -add_warn_at loc msg extra_info +-- | Display a warning, with an optional flag, for a given location. +add_warn_at :: WarnReason -> SrcSpan -> MsgDoc -> MsgDoc -> TcRn () +add_warn_at reason loc msg extra_info = do { dflags <- getDynFlags ; printer <- getPrintUnqualified dflags ; let { warn = mkLongWarnMsg dflags loc printer msg extra_info } ; - reportWarning warn } + reportWarning reason warn } tcInitTidyEnv :: TcM TidyEnv tcInitTidyEnv @@ -1486,7 +1497,8 @@ failIfM msg = do { env <- getLclEnv ; let full_msg = (if_loc env <> colon) $$ nest 2 msg ; dflags <- getDynFlags - ; liftIO (log_action dflags dflags SevFatal noSrcSpan (defaultErrStyle dflags) full_msg) + ; liftIO (log_action dflags dflags NoReason SevFatal + noSrcSpan (defaultErrStyle dflags) full_msg) ; failM } -------------------- @@ -1522,7 +1534,13 @@ forkM_maybe doc thing_inside dflags <- getDynFlags let msg = hang (text "forkM failed:" <+> doc) 2 (text (show exn)) - liftIO $ log_action dflags dflags SevFatal noSrcSpan (defaultErrStyle dflags) msg + liftIO $ log_action dflags + dflags + NoReason + SevFatal + noSrcSpan + (defaultErrStyle dflags) + msg ; traceIf (text "} ending fork (badly)" <+> doc) ; return Nothing } diff --git a/compiler/typecheck/TcSMonad.hs b/compiler/typecheck/TcSMonad.hs index 4e5cceb07a..303fee8edb 100644 --- a/compiler/typecheck/TcSMonad.hs +++ b/compiler/typecheck/TcSMonad.hs @@ -2351,9 +2351,10 @@ wrapWarnTcS :: TcM a -> TcS a wrapWarnTcS = wrapTcS failTcS, panicTcS :: SDoc -> TcS a -warnTcS, addErrTcS :: SDoc -> TcS () +warnTcS :: WarningFlag -> SDoc -> TcS () +addErrTcS :: SDoc -> TcS () failTcS = wrapTcS . TcM.failWith -warnTcS = wrapTcS . TcM.addWarn +warnTcS flag = wrapTcS . TcM.addWarn (Reason flag) addErrTcS = wrapTcS . TcM.addErr panicTcS doc = pprPanic "TcCanonical" doc diff --git a/compiler/typecheck/TcSimplify.hs b/compiler/typecheck/TcSimplify.hs index a19ceaa39d..b99823e728 100644 --- a/compiler/typecheck/TcSimplify.hs +++ b/compiler/typecheck/TcSimplify.hs @@ -18,6 +18,7 @@ module TcSimplify( import Bag import Class ( Class, classKey, classTyCon ) import DynFlags ( WarningFlag ( Opt_WarnMonomorphism ) + , WarnReason ( Reason ) , DynFlags( solverIterations ) ) import Inst import ListSetOps @@ -742,7 +743,7 @@ decideQuantification apply_mr sigs name_taus constraints -- Warn about the monomorphism restriction ; warn_mono <- woptM Opt_WarnMonomorphism ; let mr_bites = constrained_tvs `intersectsVarSet` zonked_tkvs - ; warnTc (warn_mono && mr_bites) $ + ; warnTc (Reason Opt_WarnMonomorphism) (warn_mono && mr_bites) $ hang (text "The Monomorphism Restriction applies to the binding" <> plural bndrs <+> text "for" <+> pp_bndrs) 2 (text "Consider giving a type signature for" diff --git a/compiler/typecheck/TcSplice.hs b/compiler/typecheck/TcSplice.hs index ac2ad01864..cabe75e90c 100644 --- a/compiler/typecheck/TcSplice.hs +++ b/compiler/typecheck/TcSplice.hs @@ -807,7 +807,7 @@ instance TH.Quasi TcM where -- 'msg' is forced to ensure exceptions don't escape, -- see Note [Exceptions in TH] qReport True msg = seqList msg $ addErr (text msg) - qReport False msg = seqList msg $ addWarn (text msg) + qReport False msg = seqList msg $ addWarn NoReason (text msg) qLocation = do { m <- getModule ; l <- getSrcSpanM diff --git a/compiler/typecheck/TcTyClsDecls.hs b/compiler/typecheck/TcTyClsDecls.hs index 6fee0124a3..31eaeb0d5d 100644 --- a/compiler/typecheck/TcTyClsDecls.hs +++ b/compiler/typecheck/TcTyClsDecls.hs @@ -2141,13 +2141,13 @@ checkValidDataCon dflags existential_ok tc con (bad_bang n (text "Lazy annotation (~) without StrictData")) check_bang (HsSrcBang _ want_unpack strict_mark) rep_bang n | isSrcUnpacked want_unpack, not is_strict - = addWarnTc (bad_bang n (text "UNPACK pragma lacks '!'")) + = addWarnTc NoReason (bad_bang n (text "UNPACK pragma lacks '!'")) | isSrcUnpacked want_unpack , case rep_bang of { HsUnpack {} -> False; _ -> True } , not (gopt Opt_OmitInterfacePragmas dflags) -- If not optimising, se don't unpack, so don't complain! -- See MkId.dataConArgRep, the (HsBang True) case - = addWarnTc (bad_bang n (text "Ignoring unusable UNPACK pragma")) + = addWarnTc NoReason (bad_bang n (text "Ignoring unusable UNPACK pragma")) where is_strict = case strict_mark of NoSrcStrict -> xopt LangExt.StrictData dflags diff --git a/compiler/typecheck/TcValidity.hs b/compiler/typecheck/TcValidity.hs index 319c15dd77..784cfa0211 100644 --- a/compiler/typecheck/TcValidity.hs +++ b/compiler/typecheck/TcValidity.hs @@ -684,8 +684,9 @@ check_valid_theta _ _ [] = return () check_valid_theta env ctxt theta = do { dflags <- getDynFlags - ; warnTcM (wopt Opt_WarnDuplicateConstraints dflags && - notNull dups) (dupPredWarn env dups) + ; warnTcM (Reason Opt_WarnDuplicateConstraints) + (wopt Opt_WarnDuplicateConstraints dflags && notNull dups) + (dupPredWarn env dups) ; traceTc "check_valid_theta" (ppr theta) ; mapM_ (check_pred_ty env dflags ctxt) theta } where @@ -1455,7 +1456,7 @@ checkValidCoAxiom ax@(CoAxiom { co_ax_tc = fam_tc, co_ax_branches = branches }) -- (b) failure of injectivity check_branch_compat prev_branches cur_branch | cur_branch `isDominatedBy` prev_branches - = do { addWarnAt (coAxBranchSpan cur_branch) $ + = do { addWarnAt NoReason (coAxBranchSpan cur_branch) $ inaccessibleCoAxBranch ax cur_branch ; return prev_branches } | otherwise diff --git a/docs/users_guide/using-warnings.rst b/docs/users_guide/using-warnings.rst index 24f8039451..3f24f6a6dc 100644 --- a/docs/users_guide/using-warnings.rst +++ b/docs/users_guide/using-warnings.rst @@ -102,6 +102,15 @@ The following flags are simple ways to select standard "packages" of warnings: Warnings are treated only as warnings, not as errors. This is the default, but can be useful to negate a :ghc-flag:`-Werror` flag. +When a warning is emitted, the specific warning flag which controls +it, as well as the group it belongs to, are shown. + +.. ghc-flag:: -fshow-warning-groups + + Name the group a warning flag belongs to. + + This is enabled by default. Disable with ``-fno-show-warning-groups``. + The full set of warning options is described below. To turn off any warning, simply give the corresponding ``-Wno-...`` option on the command line. For backwards compatibility with GHC versions prior to 8.0, diff --git a/ghc/GHCi/UI.hs b/ghc/GHCi/UI.hs index deb37556ce..4b39159c83 100644 --- a/ghc/GHCi/UI.hs +++ b/ghc/GHCi/UI.hs @@ -473,8 +473,8 @@ resetLastErrorLocations = do liftIO $ writeIORef (lastErrorLocations st) [] ghciLogAction :: IORef [(FastString, Int)] -> LogAction -ghciLogAction lastErrLocations dflags severity srcSpan style msg = do - defaultLogAction dflags severity srcSpan style msg +ghciLogAction lastErrLocations dflags flag severity srcSpan style msg = do + defaultLogAction dflags flag severity srcSpan style msg case severity of SevError -> case srcSpan of RealSrcSpan rsp -> modifyIORef lastErrLocations diff --git a/testsuite/tests/ghc-api/T7478/T7478.hs b/testsuite/tests/ghc-api/T7478/T7478.hs index dc6edb21a8..bd6fb37d8b 100644 --- a/testsuite/tests/ghc-api/T7478/T7478.hs +++ b/testsuite/tests/ghc-api/T7478/T7478.hs @@ -41,9 +41,9 @@ compileInGhc targets handlerOutput = do TargetFile file Nothing -> file _ -> error "fileFromTarget: not a known target" - collectSrcError handlerOutput flags SevOutput _srcspan style msg + collectSrcError handlerOutput flags _ SevOutput _srcspan style msg = handlerOutput $ GHC.showSDocForUser flags (queryQual style) msg - collectSrcError _ _ _ _ _ _ + collectSrcError _ _ _ _ _ _ _ = return () main :: IO () diff --git a/utils/mkUserGuidePart/Options/Warnings.hs b/utils/mkUserGuidePart/Options/Warnings.hs index a72395e194..b194bf2995 100644 --- a/utils/mkUserGuidePart/Options/Warnings.hs +++ b/utils/mkUserGuidePart/Options/Warnings.hs @@ -43,6 +43,11 @@ warningsOptions = , flagType = DynamicFlag , flagReverse = "-Wno-unrecognised-warning-flags" } + , flag { flagName = "-fshow-warning-groups" + , flagDescription = "show which group an emitted warning belongs to." + , flagType = DynamicFlag + , flagReverse = "-fno-show-warning-groups" + } , flag { flagName = "-fdefer-type-errors" , flagDescription = "Turn type errors into warnings, :ref:`deferring the error until "++ |