X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=ghc%2Fcompiler%2Fmain%2FErrUtils.lhs;h=8267c933eb2011f7c99bd898e79fedfd9cbcbacf;hb=9a094a5c6dd79e33224aa7eff496d7b9aa180c39;hp=edf7a30c8265305fff1604656993b7d756ce3742;hpb=5cf27e8f1731c52fe63a5b9615f927484164c61b;p=ghc-hetmet.git

diff --git a/ghc/compiler/main/ErrUtils.lhs b/ghc/compiler/main/ErrUtils.lhs
index edf7a30..8267c93 100644
--- a/ghc/compiler/main/ErrUtils.lhs
+++ b/ghc/compiler/main/ErrUtils.lhs
@@ -1,66 +1,137 @@
 %
-% (c) The AQUA Project, Glasgow University, 1994-1995
+% (c) The AQUA Project, Glasgow University, 1994-1998
 %
 \section[ErrsUtils]{Utilities for error reporting}
 
 \begin{code}
-#include "HsVersions.h"
-
 module ErrUtils (
-	Error(..), Warning(..), Message(..),
-	addErrLoc,
+	ErrMsg, WarnMsg, Message, Messages, errorsFound, warningsFound,
+
 	addShortErrLocLine, addShortWarnLocLine,
-	dontAddErrLoc,
-	pprBagOfErrors,
-	ghcExit
+	addErrLocHdrLine, dontAddErrLoc,
+
+	printErrorsAndWarnings, pprBagOfErrors, pprBagOfWarnings,
+
+	ghcExit,
+	doIfSet, doIfSet_dyn, dumpIfSet, dumpIfSet_dyn, showPass
     ) where
 
-import Ubiq{-uitous-}
+#include "HsVersions.h"
+
+import Bag		( Bag, bagToList, isEmptyBag )
+import SrcLoc		( SrcLoc, noSrcLoc, isGoodSrcLoc )
+import Util		( sortLt )
+import Outputable
+import CmdLineOpts	( DynFlags, DynFlag(..), dopt )
 
-import Bag		( bagToList )
-import PprStyle		( PprStyle(..) )
-import Pretty
-import SrcLoc		( mkUnknownSrcLoc, SrcLoc{-instance-} )
+import System		( ExitCode(..), exitWith )
+import IO		( hPutStr, stderr )
 \end{code}
 
 \begin{code}
-type Error   = PprStyle -> Pretty
-type Warning = PprStyle -> Pretty
-type Message = PprStyle -> Pretty
-
-addErrLoc :: SrcLoc -> String -> Error -> Error
-addErrLoc locn title rest_of_err_msg sty
-  = ppHang (ppBesides [ppr PprForUser locn,
-		       if null title then ppNil else ppStr (": " ++ title),
-		       ppChar ':'])
-    	 4 (rest_of_err_msg sty)
-
-addShortErrLocLine, addShortWarnLocLine :: SrcLoc -> Error -> Error
-
-addShortErrLocLine locn rest_of_err_msg sty
-  = ppHang (ppBeside (ppr PprForUser locn) (ppChar ':'))
-	 4 (rest_of_err_msg sty)
-
-addShortWarnLocLine locn rest_of_err_msg sty
-  = ppHang (ppBeside (ppr PprForUser locn) (ppPStr SLIT(":warning:")))
-	 4 (rest_of_err_msg sty)
-
-dontAddErrLoc :: String -> Error -> Error
-dontAddErrLoc title rest_of_err_msg sty
-  = ppHang (ppBesides [ppStr title, ppChar ':'])
-    	 4 (rest_of_err_msg sty)
-
-pprBagOfErrors :: PprStyle -> Bag Error -> Pretty
-pprBagOfErrors sty bag_of_errors
-  = let  pretties = map ( \ e -> e sty ) (bagToList bag_of_errors)  in
-    ppAboves (map (\ p -> ppAbove ppSP p) pretties)
+type MsgWithLoc = (SrcLoc, SDoc)
+
+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
+  | isGoodSrcLoc locn = (locn, hang (ppr locn <> colon) 4 
+				    rest_of_err_msg)
+  | otherwise	      = (locn, 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
+  | isGoodSrcLoc locn = (locn, hang (ppr locn <> colon) 4 
+				    (ptext SLIT("Warning:") <+> rest_of_err_msg))
+  | otherwise	      = (locn, rest_of_err_msg)
+
+dontAddErrLoc :: Message -> ErrMsg
+dontAddErrLoc msg = (noSrcLoc, msg)
+
 \end{code}
 
+
 \begin{code}
-ghcExit :: Int -> IO ()
+type Messages = (Bag WarnMsg, Bag ErrMsg)
+
+errorsFound :: Messages -> Bool
+errorsFound (warns, errs) = not (isEmptyBag errs)
+
+warningsFound :: Messages -> Bool
+warningsFound (warns, errs) = not (isEmptyBag warns)
 
+printErrorsAndWarnings :: PrintUnqualified -> Messages -> IO ()
+	-- Don't print any warnings if there are errors
+printErrorsAndWarnings unqual (warns, errs)
+  | no_errs && no_warns  = return ()
+  | no_errs		 = printErrs unqual (pprBagOfWarnings warns)
+  | otherwise		 = printErrs unqual (pprBagOfErrors   errs)
+  where
+    no_warns = isEmptyBag warns
+    no_errs  = isEmptyBag errs
+
+pprBagOfErrors :: Bag ErrMsg -> SDoc
+pprBagOfErrors bag_of_errors
+  = vcat [text "" $$ p | (_,p) <- 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
+
+pprBagOfWarnings :: Bag WarnMsg -> SDoc
+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
+  | dopt Opt_D_show_passes dflags = hPutStr stderr ("*** "++what++":\n")
+  | otherwise			  = return ()
+
+dumpIfSet :: Bool -> String -> SDoc -> IO ()
+dumpIfSet flag hdr doc
+  | not flag   = return ()
+  | otherwise  = printDump (dump hdr doc)
+
+dumpIfSet_dyn :: DynFlags -> DynFlag -> String -> SDoc -> IO ()
+dumpIfSet_dyn dflags flag hdr doc
+  | not (dopt flag dflags)  = return ()
+  | otherwise               = printDump (dump hdr doc)
+
+dump hdr doc 
+   = vcat [text "", 
+	   line <+> text hdr <+> line,
+	   doc,
+	   text ""]
+     where 
+        line = text (take 20 (repeat '='))
 \end{code}