\section[ListSetOps]{Set-like operations on lists}
\begin{code}
-#include "HsVersions.h"
-
module ListSetOps (
unionLists,
--UNUSED: intersectLists,
) where
-IMP_Ubiq(){-uitous-}
+#include "HsVersions.h"
import Util ( isIn, isn'tIn )
-
-#if __GLASGOW_HASKELL__ >= 202
-import List
-#endif
+import List ( union )
\end{code}
\begin{code}