Re-jig simplifySuperClass (again)

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

diff --git a/compiler/hsSyn/HsBinds.lhs b/compiler/hsSyn/HsBinds.lhs
index da247c2..0a4769d 100644 (file)
--- a/compiler/hsSyn/HsBinds.lhs
+++ b/compiler/hsSyn/HsBinds.lhs
@@ -447,7 +447,10 @@ data EvTerm
   | EvCast EvVar Coercion      -- d |> co
 
   | EvDFunApp DFunId           -- Dictionary instance application
-       [Type] [EvVar]  
+       [Type] [EvVar] 
+       [EvVar]  -- The dependencies, which is generally a bigger list than
+                -- the arguments of the dfun. 
+                -- See Note [Dependencies in self dictionaries] in TcSimplify
 
   | EvSuperClass DictId Int    -- n'th superclass. Used for both equalities and
                                -- dictionaries, even though the former have no
@@ -574,8 +577,7 @@ instance Outputable EvTerm where
   ppr (EvCast v co)     = ppr v <+> (ptext (sLit "`cast`")) <+> pprParendType co
   ppr (EvCoercion co)    = ppr co
   ppr (EvSuperClass d n) = ptext (sLit "sc") <> parens (ppr (d,n))
-  ppr (EvDFunApp df tys ts) = ppr df <+> sep [ char '@' <> ppr tys
-                                             , ppr ts ]
+  ppr (EvDFunApp df tys ts deps) = ppr df <+> sep [ char '@' <> ppr tys, ppr ts, ppr deps ]
 \end{code}
 
 %************************************************************************