Major patch to fix reporting of unused imports

[ghc-hetmet.git] / compiler / typecheck / TcRnTypes.lhs

diff --git a/compiler/typecheck/TcRnTypes.lhs b/compiler/typecheck/TcRnTypes.lhs
index cbc0fe4..c8d7550 100644 (file)
--- a/compiler/typecheck/TcRnTypes.lhs
+++ b/compiler/typecheck/TcRnTypes.lhs
@@ -70,6 +70,7 @@ import FastString
 
 import Data.Maybe
 import Data.List
+import Data.Set (Set)
 \end{code}
 
 
@@ -236,8 +237,11 @@ data TcGblEnv
        -- 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.