con colMeta = fn t_formT :: (Type * Type) => {Nam : string, Show : t_formT.1 -> xbody, Widget : nm :: Name -> xml form [] [nm = t_formT.2], WidgetPopulated : nm :: Name -> t_formT.1 -> xml form [] [nm = t_formT.2], Parse : t_formT.2 -> t_formT.1, Inject : sql_injectable t_formT.1} con colsMeta = fn cols :: {(Type * Type)} => $(mapT2T colMeta cols) val int : string -> colMeta (int, string) val float : string -> colMeta (float, string) val string : string -> colMeta (string, string) val bool : string -> colMeta (bool, bool) functor Make(M : sig con cols :: {(Type * Type)} constraint [Id] ~ cols table tab : ([Id = int] ++ mapT2T fstTT cols) val title : string val cols : colsMeta cols end) : sig val main : unit -> transaction page end