X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Fiface%2FIfaceEnv.lhs;h=ab1f9057e2ddbfa3d1bf0e083af1c8eddeaaf8c0;hb=48b625149fdcf14a91422d4dfdb44d096dde5bb0;hp=e09ff41d129e66f0ce731902a15ad3d3bbf8e31c;hpb=08a9d7341402232672fcff9062454e6ba1ae8bd1;p=ghc-hetmet.git

diff --git a/compiler/iface/IfaceEnv.lhs b/compiler/iface/IfaceEnv.lhs
index e09ff41..ab1f905 100644
--- a/compiler/iface/IfaceEnv.lhs
+++ b/compiler/iface/IfaceEnv.lhs
@@ -7,7 +7,7 @@ module IfaceEnv (
 	lookupOrig, lookupOrigNameCache, extendNameCache,
 	newIfaceName, newIfaceNames,
 	extendIfaceIdEnv, extendIfaceTyVarEnv, 
-	tcIfaceLclId,     tcIfaceTyVar, 
+	tcIfaceLclId, tcIfaceTyVar, lookupIfaceTyVar,
 	tcIfaceTick,
 
 	ifaceExportNames,
@@ -282,6 +282,11 @@ tcIfaceTyVar occ
             Nothing     -> failIfM (text "Iface type variable out of scope: " <+> ppr occ)
         }
 
+lookupIfaceTyVar :: FastString -> IfL (Maybe TyVar)
+lookupIfaceTyVar occ
+  = do	{ lcl <- getLclEnv
+	; return (lookupUFM (if_tv_env lcl) occ) }
+
 extendIfaceTyVarEnv :: [TyVar] -> IfL a -> IfL a
 extendIfaceTyVarEnv tyvars thing_inside
   = do	{ env <- getLclEnv