[project @ 2001-03-08 12:07:38 by simonpj]

[ghc-hetmet.git] / ghc / compiler / main / ErrUtils.lhs

diff --git a/ghc/compiler/main/ErrUtils.lhs b/ghc/compiler/main/ErrUtils.lhs
index 39bdd00..a262bd6 100644 (file)
--- a/ghc/compiler/main/ErrUtils.lhs
+++ b/ghc/compiler/main/ErrUtils.lhs
@@ -5,21 +5,29 @@
 
 \begin{code}
 module ErrUtils (
-       ErrMsg, WarnMsg, Message,
+       ErrMsg, WarnMsg, Message, Messages, errorsFound, warningsFound,
+
        addShortErrLocLine, addShortWarnLocLine,
-       addErrLocHdrLine,
-       dontAddErrLoc,
-       pprBagOfErrors, pprBagOfWarnings,
+       addErrLocHdrLine, addWarnLocHdrLine, dontAddErrLoc,
+
+       printErrorsAndWarnings, pprBagOfErrors, pprBagOfWarnings,
+
        ghcExit,
-       doIfSet, dumpIfSet
+       doIfSet, doIfSet_dyn, 
+       dumpIfSet, dumpIfSet_core, dumpIfSet_dyn, dumpIfSet_dyn_or, 
+       showPass
     ) where
 
 #include "HsVersions.h"
 
-import Bag             ( Bag, bagToList )
-import SrcLoc          ( SrcLoc, noSrcLoc )
+import Bag             ( Bag, bagToList, isEmptyBag )
+import SrcLoc          ( SrcLoc, noSrcLoc, isGoodSrcLoc )
 import Util            ( sortLt )
 import Outputable
+import CmdLineOpts     ( DynFlags(..), DynFlag(..), dopt )
+
+import System          ( ExitCode(..), exitWith )
+import IO              ( hPutStr, stderr )
 \end{code}
 
 \begin{code}
@@ -31,13 +39,13 @@ type Message = SDoc
 
 addShortErrLocLine  :: SrcLoc -> Message -> ErrMsg
 addErrLocHdrLine    :: SrcLoc -> Message -> Message -> ErrMsg
+addWarnLocHdrLine    :: SrcLoc -> Message -> Message -> ErrMsg
 addShortWarnLocLine :: SrcLoc -> Message -> WarnMsg
 
 addShortErrLocLine locn rest_of_err_msg
-  = ( locn
-    , hang (ppr locn <> colon) 
-         4 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
@@ -45,21 +53,45 @@ addErrLocHdrLine locn hdr rest_of_err_msg
          4 rest_of_err_msg
     )
 
-addShortWarnLocLine locn rest_of_err_msg
+addWarnLocHdrLine locn hdr rest_of_err_msg
   = ( locn
-    , hang (ppr locn <> colon)
-        4 (ptext SLIT("Warning:") <+> rest_of_err_msg)
+    , hang (ppr locn <> colon <+> ptext SLIT("Warning:") <+> hdr) 
+         4 (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 )
+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}
+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 [p $$ text "" | (_,p) <- sorted_errs ]
+  = vcat [text "" $$ p | (_,p) <- sorted_errs ]
     where
       bag_ls     = bagToList bag_of_errors
       sorted_errs = sortLt occ'ed_before bag_ls
@@ -72,28 +104,57 @@ pprBagOfWarnings bag_of_warns = pprBagOfErrors bag_of_warns
 
 \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 (dump 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 (dump hdr doc)
+  | otherwise                                   = return ()
+
+dumpIfSet_dyn :: DynFlags -> DynFlag -> String -> SDoc -> IO ()
+dumpIfSet_dyn dflags flag hdr doc
+  | dopt flag dflags || verbosity dflags >= 4 = printDump (dump 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 (dump hdr doc)
+  | otherwise = return ()
+
+dump hdr doc 
+   = vcat [text "", 
+          line <+> text hdr <+> line,
+          doc,
+          text ""]
+     where 
+        line = text (take 20 (repeat '='))
 \end{code}