fix bugs, add boolean flag to identify coercion variables

[ghc-hetmet.git] / compiler / hsSyn / HsExpr.lhs

diff --git a/compiler/hsSyn/HsExpr.lhs b/compiler/hsSyn/HsExpr.lhs
index dbe2937..c42be90 100644 (file)
--- a/compiler/hsSyn/HsExpr.lhs
+++ b/compiler/hsSyn/HsExpr.lhs
@@ -14,7 +14,8 @@ import HsPat          ( LPat )
 import HsLit           ( HsLit(..), HsOverLit )
 import HsTypes         ( LHsType, PostTcType )
 import HsImpExp                ( isOperator, pprHsVar )
-import HsBinds         ( HsLocalBinds, DictBinds, ExprCoFn, isEmptyLocalBinds )
+import HsBinds         ( HsLocalBinds, DictBinds, isEmptyLocalBinds,
+                         ExprCoFn, pprCoFn )
 
 -- others:
 import Type            ( Type, pprParendType )
@@ -379,10 +380,8 @@ ppr_expr (EAsPat v e) = ppr v <> char '@' <> pprParendExpr e
 ppr_expr (HsSCC lbl expr)
   = sep [ ptext SLIT("_scc_") <+> doubleQuotes (ftext lbl), pprParendExpr expr ]
 
-ppr_expr (HsCoerce co_fn e)
-  = ppr_expr e <+> ptext SLIT("`cast`") <+> ppr co_fn
-
-ppr_expr (HsType id) = ppr id
+ppr_expr (HsCoerce co_fn e) = pprCoFn (ppr_expr e) co_fn
+ppr_expr (HsType id)       = ppr id
 
 ppr_expr (HsSpliceE s)       = pprSplice s
 ppr_expr (HsBracket b)       = pprHsBracket b
@@ -608,7 +607,9 @@ We know the list must have at least one @Match@ in it.
 
 \begin{code}
 pprMatches :: (OutputableBndr id) => HsMatchContext id -> MatchGroup id -> SDoc
-pprMatches ctxt (MatchGroup matches _) = vcat (map (pprMatch ctxt) (map unLoc matches))
+pprMatches ctxt (MatchGroup matches ty) = vcat (map (pprMatch ctxt) (map unLoc matches))
+                                          -- Don't print the type; it's only 
+                                          -- a place-holder before typechecking
 
 -- Exported to HsBinds, which can't see the defn of HsMatchContext
 pprFunBind :: (OutputableBndr id) => id -> MatchGroup id -> SDoc