X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fmain%2FErrUtils.lhs;h=9c47296f27bbe5525edf9ea0e6bebb75d9f03194;hb=d0ed82bcb676fc7cdd2295ac40162d6ce91be8a9;hp=96c7b671303bd77d503055a8f28eae1d004f33b1;hpb=99f2474458f8eec90ee51305a3855df469cb023a;p=ghc-hetmet.git

diff --git a/ghc/compiler/main/ErrUtils.lhs b/ghc/compiler/main/ErrUtils.lhs
index 96c7b67..9c47296 100644
--- a/ghc/compiler/main/ErrUtils.lhs
+++ b/ghc/compiler/main/ErrUtils.lhs
@@ -5,95 +5,197 @@
 
 \begin{code}
 module ErrUtils (
-	ErrMsg, WarnMsg, Message,
-	addShortErrLocLine, addShortWarnLocLine,
-	addErrLocHdrLine,
-	dontAddErrLoc,
-	pprBagOfErrors, pprBagOfWarnings,
+	Message, mkLocMessage, printError,
+
+	ErrMsg, WarnMsg,
+	errMsgSpans, errMsgContext, errMsgShortDoc, errMsgExtraInfo,
+	Messages, errorsFound, emptyMessages,
+	mkErrMsg, mkWarnMsg, mkPlainErrMsg, mkLongErrMsg,
+	printErrorsAndWarnings, pprBagOfErrors, pprBagOfWarnings,
+
 	ghcExit,
-	doIfSet, dumpIfSet
+	doIfSet, doIfSet_dyn, 
+	dumpIfSet, dumpIfSet_core, dumpIfSet_dyn, dumpIfSet_dyn_or, mkDumpDoc,
+	showPass
     ) where
 
 #include "HsVersions.h"
 
-import Bag		( Bag, bagToList )
-import SrcLoc		( SrcLoc, noSrcLoc )
+import Bag		( Bag, bagToList, isEmptyBag, emptyBag )
+import SrcLoc		( SrcSpan )
 import Util		( sortLt )
 import Outputable
-\end{code}
+import qualified Pretty
+import SrcLoc		( srcSpanStart )
+import CmdLineOpts	( DynFlags(..), DynFlag(..), dopt,
+			  opt_ErrorSpans )
 
-\begin{code}
-type MsgWithLoc = (SrcLoc, SDoc)
+import List             ( replicate )
+import System		( ExitCode(..), exitWith )
+import IO		( hPutStr, stderr, stdout )
+
+
+-- -----------------------------------------------------------------------------
+-- Basic error messages: just render a message with a source location.
 
-type ErrMsg  = MsgWithLoc
-type WarnMsg = MsgWithLoc
 type Message = SDoc
 
-addShortErrLocLine  :: SrcLoc -> Message -> ErrMsg
-addErrLocHdrLine    :: SrcLoc -> Message -> Message -> ErrMsg
-addShortWarnLocLine :: SrcLoc -> Message -> WarnMsg
-
-addShortErrLocLine locn rest_of_err_msg
-  = ( locn
-    , hang (ppr locn <> colon) 
-         4 rest_of_err_msg
-    )
-
-addErrLocHdrLine locn hdr rest_of_err_msg
-  = ( locn
-    , hang (ppr locn <> colon<+> hdr) 
-         4 rest_of_err_msg
-    )
-
-addShortWarnLocLine locn rest_of_err_msg
-  = ( locn
-    , hang (ppr locn <> colon)
-	 4 (ptext SLIT("Warning:") <+> rest_of_err_msg)
-    )
-
-dontAddErrLoc :: String -> Message -> ErrMsg
-dontAddErrLoc title rest_of_err_msg
- | null title = (noSrcLoc, rest_of_err_msg)
- | otherwise  =
-    ( noSrcLoc, hang (text title <> colon) 4 rest_of_err_msg )
-
-pprBagOfErrors :: Bag ErrMsg -> SDoc
+mkLocMessage :: SrcSpan -> Message -> Message
+mkLocMessage locn msg
+  | opt_ErrorSpans = hang (ppr locn <> colon) 4 msg
+  | otherwise      = hang (ppr (srcSpanStart locn) <> colon) 4 msg
+  -- 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>".
+
+printError :: SrcSpan -> Message -> IO ()
+printError span msg = printErrs (mkLocMessage span msg $ defaultErrStyle)
+
+
+-- -----------------------------------------------------------------------------
+-- Collecting up messages for later ordering and printing.
+
+data ErrMsg = ErrMsg { 
+	errMsgSpans     :: [SrcSpan],
+	errMsgContext   :: PrintUnqualified,
+	errMsgShortDoc  :: Message,
+	errMsgExtraInfo :: Message
+	}
+	-- The SrcSpan is used for sorting errors into line-number order
+	-- NB  Pretty.Doc not SDoc: we deal with the printing style (in ptic 
+	-- whether to qualify an External Name) at the error occurrence
+
+type WarnMsg = ErrMsg
+
+-- A short (one-line) error message, with context to tell us whether
+-- to qualify names in the message or not.
+mkErrMsg :: SrcSpan -> PrintUnqualified -> Message -> ErrMsg
+mkErrMsg locn print_unqual msg
+  = ErrMsg [locn] print_unqual msg empty
+
+-- Variant that doesn't care about qualified/unqualified names
+mkPlainErrMsg :: SrcSpan -> Message -> ErrMsg
+mkPlainErrMsg locn msg
+  = ErrMsg [locn] alwaysQualify msg empty
+
+-- A long (multi-line) error message, with context to tell us whether
+-- to qualify names in the message or not.
+mkLongErrMsg :: SrcSpan -> PrintUnqualified -> Message -> Message -> ErrMsg
+mkLongErrMsg locn print_unqual msg extra 
+ = ErrMsg [locn] print_unqual msg extra
+
+-- A long (multi-line) error message, with context to tell us whether
+-- to qualify names in the message or not.
+mkLongMultiLocErrMsg :: [SrcSpan] -> PrintUnqualified -> Message -> Message -> ErrMsg
+mkLongMultiLocErrMsg locns print_unqual msg extra
+  = ErrMsg locns print_unqual msg extra
+
+mkWarnMsg :: SrcSpan -> PrintUnqualified -> Message -> WarnMsg
+mkWarnMsg = mkErrMsg
+
+mkLongWarnMsg :: SrcSpan -> PrintUnqualified -> Message -> Message -> WarnMsg
+mkLongWarnMsg = mkLongErrMsg
+
+type Messages = (Bag WarnMsg, Bag ErrMsg)
+
+emptyMessages :: Messages
+emptyMessages = (emptyBag, emptyBag)
+
+errorsFound :: DynFlags -> Messages -> Bool
+-- The dyn-flags are used to see if the user has specified
+-- -Werorr, which says that warnings should be fatal
+errorsFound dflags (warns, errs) 
+  | dopt Opt_WarnIsError dflags = not (isEmptyBag errs) || not (isEmptyBag warns)
+  | otherwise  		        = not (isEmptyBag errs)
+
+printErrorsAndWarnings :: Messages -> IO ()
+printErrorsAndWarnings (warns, errs)
+  | no_errs && no_warns  = return ()
+  | no_errs		 = printErrs (pprBagOfWarnings warns)
+			    -- Don't print any warnings if there are errors
+  | otherwise		 = printErrs (pprBagOfErrors   errs)
+  where
+    no_warns = isEmptyBag warns
+    no_errs  = isEmptyBag errs
+
+pprBagOfErrors :: Bag ErrMsg -> Pretty.Doc
 pprBagOfErrors bag_of_errors
-  = text "" $$ vcat [p $$ text "" | (_,p) <- sorted_errs ]
+  = Pretty.vcat [ let style = mkErrStyle unqual
+		      doc = mkLocMessage s (d $$ e)
+		  in
+		  Pretty.text "" Pretty.$$ doc style
+		| ErrMsg { errMsgSpans = s:ss,
+			   errMsgShortDoc = d,
+			   errMsgExtraInfo = e,
+			   errMsgContext = unqual } <- sorted_errs ]
     where
       bag_ls	  = bagToList bag_of_errors
       sorted_errs = sortLt occ'ed_before bag_ls
 
-      occ'ed_before (a,_) (b,_) = LT == compare a b
+      occ'ed_before err1 err2 = 
+         LT == compare (head (errMsgSpans err1)) (head (errMsgSpans err1))
 
-pprBagOfWarnings :: Bag WarnMsg -> SDoc
+pprBagOfWarnings :: Bag WarnMsg -> Pretty.Doc
 pprBagOfWarnings bag_of_warns = pprBagOfErrors bag_of_warns
 \end{code}
 
 \begin{code}
 ghcExit :: Int -> IO ()
-
 ghcExit val
-  = if val /= 0
-    then error "Compilation had errors\n"
-    else return ()
+  | val == 0  = exitWith ExitSuccess
+  | otherwise = do hPutStr stderr "\nCompilation had errors\n\n"
+	           exitWith (ExitFailure val)
 \end{code}
 
 \begin{code}
 doIfSet :: Bool -> IO () -> IO ()
 doIfSet flag action | flag      = action
 		    | otherwise = return ()
+
+doIfSet_dyn :: DynFlags -> DynFlag -> IO () -> IO()
+doIfSet_dyn dflags flag action | dopt flag dflags = action
+		               | otherwise        = return ()
 \end{code}
 
 \begin{code}
+showPass :: DynFlags -> String -> IO ()
+showPass dflags what
+  | verbosity dflags >= 2 = hPutStr stderr ("*** "++what++":\n")
+  | otherwise		  = return ()
+
 dumpIfSet :: Bool -> String -> SDoc -> IO ()
 dumpIfSet flag hdr doc
-  | not flag  = return ()
-  | otherwise = printDump dump
-  where
-    dump = vcat [text "", 
-		 line <+> text hdr <+> line,
-		 doc,
-		 text ""]
-    line = text (take 20 (repeat '='))
+  | not flag   = return ()
+  | otherwise  = printDump (mkDumpDoc hdr doc)
+
+dumpIfSet_core :: DynFlags -> DynFlag -> String -> SDoc -> IO ()
+dumpIfSet_core dflags flag hdr doc
+  | dopt flag dflags
+	|| verbosity dflags >= 4
+	|| dopt Opt_D_verbose_core2core dflags 	= printDump (mkDumpDoc hdr doc)
+  | otherwise                                   = return ()
+
+dumpIfSet_dyn :: DynFlags -> DynFlag -> String -> SDoc -> IO ()
+dumpIfSet_dyn dflags flag hdr doc
+  | dopt flag dflags || verbosity dflags >= 4 
+  = if   flag `elem` [Opt_D_dump_stix, Opt_D_dump_asm]
+    then printForC stdout (mkDumpDoc hdr doc)
+    else printDump (mkDumpDoc hdr doc)
+  | otherwise
+  = return ()
+
+dumpIfSet_dyn_or :: DynFlags -> [DynFlag] -> String -> SDoc -> IO ()
+dumpIfSet_dyn_or dflags flags hdr doc
+  | or [dopt flag dflags | flag <- flags]
+  || verbosity dflags >= 4 
+  = printDump (mkDumpDoc hdr doc)
+  | otherwise = return ()
+
+mkDumpDoc hdr doc 
+   = vcat [text "", 
+	   line <+> text hdr <+> line,
+	   doc,
+	   text ""]
+     where 
+        line = text (replicate 20 '=')
 \end{code}