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diff --git a/examples/tutorial/semantics/GSyntax.hs b/examples/tutorial/semantics/GSyntax.hs
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+module GSyntax where
+
+import GF.GFCC.DataGFCC
+import GF.GFCC.AbsGFCC
+----------------------------------------------------
+-- automatic translation from GF to Haskell
+----------------------------------------------------
+
+class Gf a where gf :: a -> Exp
+class Fg a where fg :: Exp -> a
+
+newtype GString = GString String  deriving Show
+
+instance Gf GString where
+  gf (GString s) = DTr [] (AS s) []
+
+instance Fg GString where
+  fg t =
+    case t of
+      DTr [] (AS s) []  -> GString s
+      _ -> error ("no GString " ++ show t)
+
+newtype GInt = GInt Integer  deriving Show
+
+instance Gf GInt where
+  gf (GInt s) = DTr [] (AI s) []
+
+instance Fg GInt where
+  fg t =
+    case t of
+      DTr [] (AI s) []  -> GInt s
+      _ -> error ("no GInt " ++ show t)
+
+newtype GFloat = GFloat Double  deriving Show
+
+instance Gf GFloat where
+  gf (GFloat s) = DTr [] (AF s) []
+
+instance Fg GFloat where
+  fg t =
+    case t of
+      DTr [] (AF s) []  -> GFloat s
+      _ -> error ("no GFloat " ++ show t)
+
+----------------------------------------------------
+-- below this line machine-generated
+----------------------------------------------------
+
+data GA2 =
+   GDivisible 
+ | GEqual 
+ | GGreater 
+ | GSmaller 
+  deriving Show
+
+data GAP =
+   GComplA2 GA2 GNP 
+ | GConjAP GConj GAP GAP 
+ | GEven 
+ | GOdd 
+ | GPrime 
+  deriving Show
+
+data GCN =
+   GModCN GAP GCN 
+ | GNumber 
+  deriving Show
+
+data GConj =
+   GAnd 
+ | GOr 
+  deriving Show
+
+data GNP =
+   GConjNP GConj GNP GNP 
+ | GEvery GCN 
+ | GSome GCN 
+ | GUseInt GInt 
+  deriving Show
+
+data GS =
+   GConjS GConj GS GS 
+ | GPredAP GNP GAP 
+  deriving Show
+
+
+instance Gf GA2 where
+ gf GDivisible = DTr [] (AC (CId "Divisible")) []
+ gf GEqual = DTr [] (AC (CId "Equal")) []
+ gf GGreater = DTr [] (AC (CId "Greater")) []
+ gf GSmaller = DTr [] (AC (CId "Smaller")) []
+
+instance Gf GAP where
+ gf (GComplA2 x1 x2) = DTr [] (AC (CId "ComplA2")) [gf x1, gf x2]
+ gf (GConjAP x1 x2 x3) = DTr [] (AC (CId "ConjAP")) [gf x1, gf x2, gf x3]
+ gf GEven = DTr [] (AC (CId "Even")) []
+ gf GOdd = DTr [] (AC (CId "Odd")) []
+ gf GPrime = DTr [] (AC (CId "Prime")) []
+
+instance Gf GCN where
+ gf (GModCN x1 x2) = DTr [] (AC (CId "ModCN")) [gf x1, gf x2]
+ gf GNumber = DTr [] (AC (CId "Number")) []
+
+instance Gf GConj where
+ gf GAnd = DTr [] (AC (CId "And")) []
+ gf GOr = DTr [] (AC (CId "Or")) []
+
+instance Gf GNP where
+ gf (GConjNP x1 x2 x3) = DTr [] (AC (CId "ConjNP")) [gf x1, gf x2, gf x3]
+ gf (GEvery x1) = DTr [] (AC (CId "Every")) [gf x1]
+ gf (GSome x1) = DTr [] (AC (CId "Some")) [gf x1]
+ gf (GUseInt x1) = DTr [] (AC (CId "UseInt")) [gf x1]
+
+instance Gf GS where
+ gf (GConjS x1 x2 x3) = DTr [] (AC (CId "ConjS")) [gf x1, gf x2, gf x3]
+ gf (GPredAP x1 x2) = DTr [] (AC (CId "PredAP")) [gf x1, gf x2]
+
+
+instance Fg GA2 where
+ fg t =
+  case t of
+    DTr [] (AC (CId "Divisible")) [] -> GDivisible 
+    DTr [] (AC (CId "Equal")) [] -> GEqual 
+    DTr [] (AC (CId "Greater")) [] -> GGreater 
+    DTr [] (AC (CId "Smaller")) [] -> GSmaller 
+    _ -> error ("no A2 " ++ show t)
+
+instance Fg GAP where
+ fg t =
+  case t of
+    DTr [] (AC (CId "ComplA2")) [x1,x2] -> GComplA2 (fg x1) (fg x2)
+    DTr [] (AC (CId "ConjAP")) [x1,x2,x3] -> GConjAP (fg x1) (fg x2) (fg x3)
+    DTr [] (AC (CId "Even")) [] -> GEven 
+    DTr [] (AC (CId "Odd")) [] -> GOdd 
+    DTr [] (AC (CId "Prime")) [] -> GPrime 
+    _ -> error ("no AP " ++ show t)
+
+instance Fg GCN where
+ fg t =
+  case t of
+    DTr [] (AC (CId "ModCN")) [x1,x2] -> GModCN (fg x1) (fg x2)
+    DTr [] (AC (CId "Number")) [] -> GNumber 
+    _ -> error ("no CN " ++ show t)
+
+instance Fg GConj where
+ fg t =
+  case t of
+    DTr [] (AC (CId "And")) [] -> GAnd 
+    DTr [] (AC (CId "Or")) [] -> GOr 
+    _ -> error ("no Conj " ++ show t)
+
+instance Fg GNP where
+ fg t =
+  case t of
+    DTr [] (AC (CId "ConjNP")) [x1,x2,x3] -> GConjNP (fg x1) (fg x2) (fg x3)
+    DTr [] (AC (CId "Every")) [x1] -> GEvery (fg x1)
+    DTr [] (AC (CId "Some")) [x1] -> GSome (fg x1)
+    DTr [] (AC (CId "UseInt")) [x1] -> GUseInt (fg x1)
+    _ -> error ("no NP " ++ show t)
+
+instance Fg GS where
+ fg t =
+  case t of
+    DTr [] (AC (CId "ConjS")) [x1,x2,x3] -> GConjS (fg x1) (fg x2) (fg x3)
+    DTr [] (AC (CId "PredAP")) [x1,x2] -> GPredAP (fg x1) (fg x2)
+    _ -> error ("no S " ++ show t)
+
+