X-Git-Url: http://git.megacz.com/?a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcRnTypes.lhs;h=19432fa98853d766b1b2e5f26621abffbfd3f7fa;hb=2f223e8f4a4e2fb22a8bb0638cd48256e9f2f0e2;hp=cbc0fe4f4df27dd1932f964ac7d91c35c567a5d5;hpb=296058a1cafa80dec0b3f998348bce7c65f668b0;p=ghc-hetmet.git

diff --git a/compiler/typecheck/TcRnTypes.lhs b/compiler/typecheck/TcRnTypes.lhs
index cbc0fe4..19432fa 100644
--- a/compiler/typecheck/TcRnTypes.lhs
+++ b/compiler/typecheck/TcRnTypes.lhs
@@ -68,8 +68,7 @@ import Outputable
 import ListSetOps
 import FastString
 
-import Data.Maybe
-import Data.List
+import Data.Set (Set)
 \end{code}
 
 
@@ -223,21 +222,18 @@ data TcGblEnv
           -- reference is implicit rather than explicit, so we have to zap a
           -- mutable variable.
 
-	tcg_dfun_n  :: TcRef Int,
-          -- ^ Allows us to number off the names of DFuns.
-          --
-          -- It's convenient to allocate an External Name for a DFun, with
-          -- a permanently-fixed unique, just like other top-level functions
-          -- defined in this module.  But that means we need a canonical
-          -- occurrence name, distinct from all other dfuns in this module,
-          -- and this name supply serves that purpose (df1, df2, etc).
+	tcg_dfun_n  :: TcRef OccSet,
+          -- ^ Allows us to choose unique DFun names.
 
 	-- The next fields accumulate the payload of the module
 	-- The binds, rules and foreign-decl fiels are collected
 	-- initially in un-zonked form and are finally zonked in tcRnSrcDecls
 
-        tcg_rn_imports :: Maybe [LImportDecl Name],
         tcg_rn_exports :: Maybe [Located (IE Name)],
+        tcg_rn_imports :: [LImportDecl Name],
+		-- Keep the renamed imports regardless.  They are not 
+		-- voluminous and are needed if you want to report unused imports
+        tcg_used_rdrnames :: TcRef (Set RdrName),
 	tcg_rn_decls :: Maybe (HsGroup Name),
           -- ^ Renamed decls, maybe.  @Nothing@ <=> Don't retain renamed
           -- decls.