--- a/lib/top.urs	Thu Sep 18 15:01:01 2008 -0400
+++ b/lib/top.urs	Sat Oct 04 15:50:28 2008 -0400
@@ -22,52 +22,52 @@
 
 val foldTR : tf :: (Type -> Type) -> tr :: ({Type} -> Type)
         -> (nm :: Name -> t :: Type -> rest :: {Type} -> [nm] ~ rest
-                -> tf t -> tr rest -> tr ([nm = t] ++ rest))
+                => tf t -> tr rest -> tr ([nm = t] ++ rest))
         -> tr [] -> r :: {Type} -> $(mapTT tf r) -> tr r
 
 val foldT2R : tf :: ((Type * Type) -> Type) -> tr :: ({(Type * Type)} -> Type)
         -> (nm :: Name -> t :: (Type * Type) -> rest :: {(Type * Type)} -> [nm] ~ rest
-                -> tf t -> tr rest -> tr ([nm = t] ++ rest))
+                => tf t -> tr rest -> tr ([nm = t] ++ rest))
         -> tr [] -> r :: {(Type * Type)} -> $(mapT2T tf r) -> tr r
 
 val foldTR2 : tf1 :: (Type -> Type) -> tf2 :: (Type -> Type) -> tr :: ({Type} -> Type)
         -> (nm :: Name -> t :: Type -> rest :: {Type} -> [nm] ~ rest
-                -> tf1 t -> tf2 t -> tr rest -> tr ([nm = t] ++ rest))
+                => tf1 t -> tf2 t -> tr rest -> tr ([nm = t] ++ rest))
         -> tr [] -> r :: {Type} -> $(mapTT tf1 r) -> $(mapTT tf2 r) -> tr r
 
 val foldT2R2 : tf1 :: ((Type * Type) -> Type) -> tf2 :: ((Type * Type) -> Type)
         -> tr :: ({(Type * Type)} -> Type)
         -> (nm :: Name -> t :: (Type * Type) -> rest :: {(Type * Type)} -> [nm] ~ rest
-                -> tf1 t -> tf2 t -> tr rest -> tr ([nm = t] ++ rest))
+                => tf1 t -> tf2 t -> tr rest -> tr ([nm = t] ++ rest))
         -> tr [] -> r :: {(Type * Type)} -> $(mapT2T tf1 r) -> $(mapT2T tf2 r) -> tr r
 
 val foldTRX : tf :: (Type -> Type) -> ctx :: {Unit}
         -> (nm :: Name -> t :: Type -> rest :: {Type} -> [nm] ~ rest
-                -> tf t -> xml ctx [] [])
+                => tf t -> xml ctx [] [])
         -> r :: {Type} -> $(mapTT tf r) -> xml ctx [] []
 
 val foldT2RX : tf :: ((Type * Type) -> Type) -> ctx :: {Unit}
         -> (nm :: Name -> t :: (Type * Type) -> rest :: {(Type * Type)} -> [nm] ~ rest
-                -> tf t -> xml ctx [] [])
+                => tf t -> xml ctx [] [])
         -> r :: {(Type * Type)} -> $(mapT2T tf r) -> xml ctx [] []
 
 val foldTRX2 : tf1 :: (Type -> Type) -> tf2 :: (Type -> Type) -> ctx :: {Unit}
         -> (nm :: Name -> t :: Type -> rest :: {Type} -> [nm] ~ rest
-                -> tf1 t -> tf2 t -> xml ctx [] [])
+                => tf1 t -> tf2 t -> xml ctx [] [])
         -> r :: {Type} -> $(mapTT tf1 r) -> $(mapTT tf2 r) -> xml ctx [] []
 
 val foldT2RX2 : tf1 :: ((Type * Type) -> Type) -> tf2 :: ((Type * Type) -> Type) -> ctx :: {Unit}
         -> (nm :: Name -> t :: (Type * Type) -> rest :: {(Type * Type)} -> [nm] ~ rest
-                -> tf1 t -> tf2 t -> xml ctx [] [])
+                => tf1 t -> tf2 t -> xml ctx [] [])
         -> r :: {(Type * Type)} -> $(mapT2T tf1 r) -> $(mapT2T tf2 r) -> xml ctx [] []
 
 val queryX : tables ::: {{Type}} -> exps ::: {Type} -> ctx ::: {Unit}
         -> sql_query tables exps -> tables ~ exps
-        -> ($(exps ++ fold (fn nm (fields :: {Type}) acc => [nm] ~ acc => [nm = $fields] ++ acc) [] tables)
+        => ($(exps ++ fold (fn nm (fields :: {Type}) acc => [nm] ~ acc => [nm = $fields] ++ acc) [] tables)
                 -> xml ctx [] [])
         -> transaction (xml ctx [] [])
 
 val oneOrNoRows : tables ::: {{Type}} -> exps ::: {Type} -> sql_query tables exps
         -> tables ~ exps
-        -> transaction
+        => transaction
                 (option $(exps ++ fold (fn nm (fields :: {Type}) acc => [nm] ~ acc => [nm = $fields] ++ acc) [] tables))