X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=blobdiff_plain;f=compiler%2Ftypecheck%2FTcRnTypes.lhs;h=746a30bab3f13cb4b1c13a40cfcf68e20b0412a5;hp=a91e95e377ae504e9ef2aa82ada65bd88b209670;hb=90686adf9d3dc7a09a51853df051bc4ea472d840;hpb=26f164e5759e9eca73deb0531ddec422d36a6924

diff --git a/compiler/typecheck/TcRnTypes.lhs b/compiler/typecheck/TcRnTypes.lhs
index a91e95e..746a30b 100644
--- a/compiler/typecheck/TcRnTypes.lhs
+++ b/compiler/typecheck/TcRnTypes.lhs
@@ -233,7 +233,11 @@ data TcGblEnv
         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),
+		-- The set of used *imported* (not locally-defined) RdrNames
+		-- Used only to report unused import declarations
+
 	tcg_rn_decls :: Maybe (HsGroup Name),
           -- ^ Renamed decls, maybe.  @Nothing@ <=> Don't retain renamed
           -- decls.