X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcClassDcl.lhs;h=542ce20a603240e0a04d215db7a31192d245396a;hp=839a5a276b999810597512b152e4e000d22d707d;hb=a3bab0506498db41853543558c52a4fda0d183af;hpb=62f76a3cbced691b60f511fb83547a5d62653252

diff --git a/compiler/typecheck/TcClassDcl.lhs b/compiler/typecheck/TcClassDcl.lhs
index 839a5a2..542ce20 100644
--- a/compiler/typecheck/TcClassDcl.lhs
+++ b/compiler/typecheck/TcClassDcl.lhs
@@ -229,45 +229,35 @@ tcDefMeth clas tyvars this_dict binds_in sig_fn prag_fn (sel_id, dm_info)
           tcInstanceMethodBody (ClsSkol clas)
                                tyvars 
                                [this_dict]
-                               Nothing
                                dm_id_w_inline local_dm_id
                                dm_sig_fn IsDefaultMethod meth_bind }
 
 ---------------
 tcInstanceMethodBody :: SkolemInfo -> [TcTyVar] -> [EvVar]
-		     -> Maybe EvBind
                      -> Id -> Id
           	     -> SigFun -> TcSpecPrags -> LHsBind Name 
           	     -> TcM (LHsBind Id)
 tcInstanceMethodBody skol_info tyvars dfun_ev_vars
-		     this_dict meth_id local_meth_id
+                     meth_id local_meth_id
 		     meth_sig_fn specs 
                      (L loc bind)
   = do	{       -- Typecheck the binding, first extending the envt
 		-- so that when tcInstSig looks up the local_meth_id to find
 		-- its signature, we'll find it in the environment
-	  let full_given = case this_dict of
-                             Nothing -> dfun_ev_vars
-			     Just (EvBind dict _) -> dict : dfun_ev_vars
-              lm_bind = L loc (bind { fun_id = L loc (idName local_meth_id) })
-			     -- Substitue the local_meth_name for the binder
+          let lm_bind = L loc (bind { fun_id = L loc (idName local_meth_id) })
+                             -- Substitute the local_meth_name for the binder
 			     -- NB: the binding is always a FunBind
 
 	; (ev_binds, (tc_bind, _)) 
-               <- checkConstraints skol_info tyvars full_given $
+               <- checkConstraints skol_info tyvars dfun_ev_vars $
 		  tcExtendIdEnv [local_meth_id] $
 	          tcPolyBinds TopLevel meth_sig_fn no_prag_fn 
 		  	     NonRecursive NonRecursive
 		  	     [lm_bind]
 
-        -- Add the binding for this_dict, if we have one
-        ; ev_binds' <- case this_dict of
-                         Nothing                -> return ev_binds
-                         Just (EvBind self rhs) -> extendTcEvBinds ev_binds self rhs
-
-	; let full_bind = AbsBinds { abs_tvs = tyvars, abs_ev_vars = dfun_ev_vars
+        ; let full_bind = AbsBinds { abs_tvs = tyvars, abs_ev_vars = dfun_ev_vars
                                    , abs_exports = [(tyvars, meth_id, local_meth_id, specs)]
-				   , abs_ev_binds = ev_binds'
+                                   , abs_ev_binds = ev_binds
                                    , abs_binds = tc_bind }
 
         ; return (L loc full_bind) } 
@@ -538,7 +528,7 @@ mkGenericInstance clas (hs_ty, binds) = do
     let
 	inst_theta = [mkClassPred clas [mkTyVarTy tv] | tv <- tyvars]
 	dfun_id    = mkDictFunId dfun_name tyvars inst_theta clas [inst_ty]
-	ispec	   = mkLocalInstance dfun_id overlap_flag
+        ispec      = mkLocalInstance dfun_id overlap_flag
 
     return (InstInfo { iSpec = ispec, iBinds = VanillaInst binds [] False })
 \end{code}