[project @ 1996-04-25 16:31:20 by partain]

[ghc-hetmet.git] / ghc / compiler / deSugar / DsUtils.lhs

diff --git a/ghc/compiler/deSugar/DsUtils.lhs b/ghc/compiler/deSugar/DsUtils.lhs
index e6b80f2..eeb8f26 100644 (file)
--- a/ghc/compiler/deSugar/DsUtils.lhs
+++ b/ghc/compiler/deSugar/DsUtils.lhs
@@ -43,6 +43,7 @@ import PprStyle               ( PprStyle(..) )
 import PrelInfo                ( stringTy, iRREFUT_PAT_ERROR_ID )
 import Pretty          ( ppShow )
 import Id              ( idType, dataConArgTys, mkTupleCon,
+                         pprId{-ToDo:rm-},
                          DataCon(..), DictVar(..), Id(..), GenId )
 import Literal         ( Literal(..) )
 import TyCon           ( mkTupleTyCon )
@@ -50,7 +51,13 @@ import Type          ( mkTyVarTys, mkRhoTy, mkForAllTys, mkFunTys,
                          isUnboxedType, applyTyCon, getAppDataTyCon
                        )
 import UniqSet         ( mkUniqSet, minusUniqSet, uniqSetToList, UniqSet(..) )
-import Util            ( panic, assertPanic )
+import Util            ( panic, assertPanic, pprTrace{-ToDo:rm-} )
+import PprCore{-ToDo:rm-}
+import PprType--ToDo:rm
+import Pretty--ToDo:rm
+import TyVar--ToDo:rm
+import Unique--ToDo:rm
+import Usage--ToDo:rm
 
 splitDictType = panic "DsUtils.splitDictType"
 \end{code}
@@ -129,6 +136,7 @@ mkCoPrimCaseMatchResult var alts
 mkCoAlgCaseMatchResult :: Id                           -- Scrutinee
                    -> [(DataCon, [Id], MatchResult)]   -- Alternatives
                    -> DsM MatchResult
+
 mkCoAlgCaseMatchResult var alts
   =        -- Find all the constructors in the type which aren't
            -- explicitly mentioned in the alternatives:
@@ -164,7 +172,7 @@ mkCoAlgCaseMatchResult var alts
                                      cxt1)
   where
     scrut_ty = idType var
-    (tycon, tycon_arg_tys, data_cons) = getAppDataTyCon scrut_ty
+    (tycon, tycon_arg_tys, data_cons) = pprTrace "CoAlgCase:" (pprType PprDebug scrut_ty) $ getAppDataTyCon scrut_ty
 
     un_mentioned_constructors
       = uniqSetToList (mkUniqSet data_cons `minusUniqSet` mkUniqSet [ con | (con, _, _) <- alts] )
@@ -395,7 +403,9 @@ The general case:
 
 \begin{code}
 mkTupleBind tyvars dicts local_global_prs tuple_expr
-  = newSysLocalDs tuple_var_ty `thenDs` \ tuple_var ->
+  = pprTrace "mkTupleBind:\n" (ppAboves [ppCat (map (pprId PprShowAll) locals), ppCat (map (pprId PprShowAll) globals), {-ppr PprDebug local_tuple, pprType PprDebug res_ty,-} ppr PprDebug tuple_expr]) $
+
+    newSysLocalDs tuple_var_ty `thenDs` \ tuple_var ->
 
     zipWithDs (mk_selector (Var tuple_var))
              local_global_prs