1 files changed, 12 insertions, 0 deletions
diff --git a/progs/lib/cl/maybe.hs b/progs/lib/cl/maybe.hs
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+-- maybe.hs -- "maybe" type
+--
+-- author :  Sandra Loosemore
+-- date   :  22 June 1993
+--
+
+module Maybe where
+
+data Maybe a = Some a | Null
+
+{-# ImportLispType (Maybe(Some("identity", "identity", "identity"),
+                          Null("not", "'#f")))  #-}