X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2FdeSugar%2FDsExpr.lhs;fp=compiler%2FdeSugar%2FDsExpr.lhs;h=e33b113ae783ddc8ea1f035743d455f245022c2a;hp=4088e44b1b9504fca5b240691670e466d87b61a0;hb=ca53c38335cdc671f0b1e0949aa1514fc3fd72a5;hpb=246183c669a1e851ccc42697dbbf309292bf2a08

diff --git a/compiler/deSugar/DsExpr.lhs b/compiler/deSugar/DsExpr.lhs
index 4088e44..e33b113 100644
--- a/compiler/deSugar/DsExpr.lhs
+++ b/compiler/deSugar/DsExpr.lhs
@@ -49,8 +49,8 @@ import DynFlags
 import StaticFlags
 import CostCentre
 import Id
-import Var
 import VarSet
+import VarEnv
 import DataCon
 import TysWiredIn
 import BasicTypes
@@ -513,12 +513,12 @@ dsExpr expr@(RecordUpd record_expr (HsRecFields { rec_flds = fields })
 
     mk_alt upd_fld_env con
       = do { let (univ_tvs, ex_tvs, eq_spec, 
-		  eq_theta, dict_theta, arg_tys, _) = dataConFullSig con
+		  theta, arg_tys, _) = dataConFullSig con
 		 subst = mkTopTvSubst (univ_tvs `zip` in_inst_tys)
 
 		-- I'm not bothering to clone the ex_tvs
 	   ; eqs_vars   <- mapM newPredVarDs (substTheta subst (eqSpecPreds eq_spec))
-	   ; theta_vars <- mapM newPredVarDs (substTheta subst (eq_theta ++ dict_theta))
+	   ; theta_vars <- mapM newPredVarDs (substTheta subst theta)
 	   ; arg_ids    <- newSysLocalsDs (substTys subst arg_tys)
 	   ; let val_args = zipWithEqual "dsExpr:RecordUpd" mk_val_arg
     					 (dataConFieldLabels con) arg_ids
@@ -529,21 +529,21 @@ dsExpr expr@(RecordUpd record_expr (HsRecFields { rec_flds = fields })
 		 wrap = mkWpEvVarApps theta_vars          `WpCompose` 
 			mkWpTyApps    (mkTyVarTys ex_tvs) `WpCompose`
 			mkWpTyApps [ty | (tv, ty) <- univ_tvs `zip` out_inst_tys
-				       , isNothing (lookupTyVar wrap_subst tv) ]
+				       , not (tv `elemVarEnv` wrap_subst) ]
     	         rhs = foldl (\a b -> nlHsApp a b) inst_con val_args
 
 			-- Tediously wrap the application in a cast
 			-- Note [Update for GADTs]
 		 wrapped_rhs | null eq_spec = rhs
 			     | otherwise    = mkLHsWrap (WpCast wrap_co) rhs
-		 wrap_co = mkTyConApp tycon [ lookup tv ty 
-					    | (tv,ty) <- univ_tvs `zip` out_inst_tys]
-		 lookup univ_tv ty = case lookupTyVar wrap_subst univ_tv of
-					Just ty' -> ty'
-					Nothing  -> ty
-		 wrap_subst = mkTopTvSubst [ (tv,mkSymCoercion (mkTyVarTy co_var))
-					   | ((tv,_),co_var) <- eq_spec `zip` eqs_vars ]
-		 
+		 wrap_co = mkTyConAppCo tycon [ lookup tv ty
+					      | (tv,ty) <- univ_tvs `zip` out_inst_tys]
+		 lookup univ_tv ty = case lookupVarEnv wrap_subst univ_tv of
+					Just co' -> co'
+					Nothing  -> mkReflCo ty
+		 wrap_subst = mkVarEnv [ (tv, mkSymCo (mkCoVarCo co_var))
+				       | ((tv,_),co_var) <- eq_spec `zip` eqs_vars ]
+
     	         pat = noLoc $ ConPatOut { pat_con = noLoc con, pat_tvs = ex_tvs
 					 , pat_dicts = eqs_vars ++ theta_vars
 					 , pat_binds = emptyTcEvBinds
@@ -583,7 +583,7 @@ dsExpr (HsTick ix vars e) = do
 
 dsExpr (HsBinTick ixT ixF e) = do
   e2 <- dsLExpr e
-  do { ASSERT(exprType e2 `coreEqType` boolTy)
+  do { ASSERT(exprType e2 `eqType` boolTy)
        mkBinaryTickBox ixT ixF e2
      }
 \end{code}
@@ -787,7 +787,7 @@ warnAboutIdentities (Var v) co_fn
   | idName v `elem` conversionNames
   , let fun_ty = exprType (co_fn (Var v))
   , Just (arg_ty, res_ty) <- splitFunTy_maybe fun_ty
-  , arg_ty `tcEqType` res_ty  -- So we are converting  ty -> ty
+  , arg_ty `eqType` res_ty  -- So we are converting  ty -> ty
   = warnDs (vcat [ ptext (sLit "Call of") <+> ppr v <+> dcolon <+> ppr fun_ty
                  , nest 2 $ ptext (sLit "can probably be omitted")
                  , parens (ptext (sLit "Use -fno-warn-identities to suppress this messsage)"))
@@ -822,7 +822,7 @@ warnDiscardedDoBindings rhs rhs_ty
          -- but only if we didn't already warn due to Opt_WarnUnusedDoBind
     do { warn_wrong <- doptDs Opt_WarnWrongDoBind
        ; case tcSplitAppTy_maybe elt_ty of
-           Just (elt_m_ty, _) | warn_wrong, m_ty `tcEqType` elt_m_ty
+           Just (elt_m_ty, _) | warn_wrong, m_ty `eqType` elt_m_ty
                               -> warnDs (wrongMonadBind rhs elt_ty)
            _ -> return () } }