datatype option a = None | Some of a val none_Hi : option string = None val some_Hi = Some "Hi" val none_some_Hi : option (option string) = None val some_some_Hi = Some some_Hi val show = fn x => case x of None => "None" | Some x => x val show2 = fn x => case x of None => "None'" | Some x => show x val page = fn x => return {cdata (show x)} val page2 = fn x => return {cdata (show2 x)} val main : unit -> transaction page = fn () => return
  • None1
  • Some1
  • None2
  • Some2