[project @ 1996-06-05 06:44:31 by partain]

[ghc-hetmet.git] / ghc / compiler / rename / RnUtils.lhs

diff --git a/ghc/compiler/rename/RnUtils.lhs b/ghc/compiler/rename/RnUtils.lhs
index 2658fcc..7205e91 100644 (file)
--- a/ghc/compiler/rename/RnUtils.lhs
+++ b/ghc/compiler/rename/RnUtils.lhs
@@ -10,25 +10,18 @@ module RnUtils (
        RnEnv(..), QualNames(..),
        UnqualNames(..), ScopeStack(..),
        emptyRnEnv, extendGlobalRnEnv, extendLocalRnEnv,
-       lookupRnEnv, lookupTcRnEnv,
+       lookupRnEnv, lookupGlobalRnEnv, lookupTcRnEnv,
 
        lubExportFlag,
 
-       unknownNameErr,
-       badClassOpErr,
        qualNameErr,
-       dupNamesErr,
-       shadowedNameWarn,
-       multipleOccWarn,
-
-       -- ToDo: nuke/move? WDP 96/04/05
-       GlobalNameMapper(..),  GlobalNameMappers(..)
+       dupNamesErr
     ) where
 
-import Ubiq
+IMP_Ubiq(){-uitous-}
 
 import Bag             ( Bag, emptyBag, snocBag, unionBags )
-import ErrUtils                ( addShortErrLocLine, addErrLoc )
+import ErrUtils                ( addShortErrLocLine )
 import FiniteMap       ( FiniteMap, emptyFM, isEmptyFM,
                          lookupFM, addListToFM, addToFM )
 import Maybes          ( maybeToBool )
@@ -37,9 +30,6 @@ import PprStyle               ( PprStyle(..) )
 import Pretty
 import RnHsSyn         ( RnName )
 import Util            ( assertPanic )
-
-type GlobalNameMapper  = RnName -> Maybe Name
-type GlobalNameMappers = (GlobalNameMapper, GlobalNameMapper)
 \end{code}
 
 *********************************************************
@@ -63,6 +53,7 @@ extendGlobalRnEnv :: RnEnv -> [(RdrName,RnName)] -> [(RdrName,RnName)]
                  -> (RnEnv, Bag (RdrName, RnName, RnName))
 extendLocalRnEnv  :: Bool -> RnEnv -> [RnName] -> (RnEnv, [RnName])
 lookupRnEnv      :: RnEnv -> RdrName -> Maybe RnName
+lookupGlobalRnEnv :: RnEnv -> RdrName -> Maybe RnName
 lookupTcRnEnv    :: RnEnv -> RdrName -> Maybe RnName
 \end{code}
 
@@ -143,6 +134,11 @@ lookupRnEnv ((qual, unqual, _, _), stack) rdr
            found@(Just name) -> found
            Nothing           -> do_on_fail
 
+lookupGlobalRnEnv ((qual, unqual, _, _), _) rdr
+  = case rdr of 
+      Unqual str   -> lookupFM unqual str
+      Qual mod str -> lookupFM qual (str,mod)
+
 lookupTcRnEnv ((_, _, tc_qual, tc_unqual), _) rdr
   = case rdr of 
       Unqual str   -> lookupFM tc_unqual str
@@ -164,20 +160,11 @@ lubExportFlag ExportAbs ExportAbs = ExportAbs
 
 *********************************************************
 *                                                      *
-\subsection{Errors used in RnMonad}
+\subsection{Errors used *more than once* in the renamer}
 *                                                      *
 *********************************************************
 
 \begin{code}
-unknownNameErr descriptor name locn
-  = addShortErrLocLine locn ( \ sty ->
-    ppBesides [ppStr "undefined ", ppStr descriptor, ppStr ": ", pprNonSym sty name] )
-
-badClassOpErr clas op locn
-  = addErrLoc locn "" ( \ sty ->
-    ppBesides [ppChar '`', pprNonSym sty op, ppStr "' is not an operation of class `",
-             ppr sty clas, ppStr "'"] )
-
 qualNameErr descriptor (name,locn)
   = addShortErrLocLine locn ( \ sty ->
     ppBesides [ppStr "invalid use of qualified ", ppStr descriptor, ppStr ": ", pprNonSym sty name ] )
@@ -186,20 +173,13 @@ dupNamesErr descriptor ((name1,locn1) : dup_things) sty
   = ppAboves (item1 : map dup_item dup_things)
   where
     item1
-      = ppBesides [ ppr PprForUser locn1,
-           ppStr ": multiple declarations of a ", ppStr descriptor, ppStr ": ",
-           pprNonSym sty name1 ]
+      = addShortErrLocLine locn1 (\ sty ->
+       ppBesides [ppStr "multiple declarations of a ", ppStr descriptor, ppStr " `", 
+                  pprNonSym sty name1, ppStr "'" ]) sty
 
     dup_item (name, locn)
-      = ppBesides [ ppr PprForUser locn,
-           ppStr ": here was another declaration of `", pprNonSym sty name, ppStr "'" ]
-
-shadowedNameWarn locn shadow
-  = addShortErrLocLine locn ( \ sty ->
-    ppBesides [ppStr "more than one value with the same name (shadowing): ", ppr sty shadow] )
-
-multipleOccWarn (name, occs) sty
-  = ppBesides [ppStr "multiple names used to refer to `", ppr sty name, ppStr "': ",
-              ppInterleave ppComma (map (ppr sty) occs)]
+      = addShortErrLocLine locn (\ sty ->
+       ppBesides [ppStr "here was another declaration of `",
+                  pprNonSym sty name, ppStr "'" ]) sty
 \end{code}