adamc@198: datatype option a = None | Some of a adamc@198: adamc@198: val none_Hi : option string = None adamc@198: val some_Hi = Some "Hi" adamc@198: val none_some_Hi : option (option string) = None adamc@198: val some_some_Hi = Some some_Hi adamc@198: adamc@198: val show = fn x => case x of None => "None" | Some x => x adamc@198: adamc@198: val show2 = fn x => case x of None => "None'" | Some x => show x adamc@198: adamc@284: val page = fn x => return adamc@198: {cdata (show x)} adamc@198: adamc@198: adamc@284: val page2 = fn x => return adamc@198: {cdata (show2 x)} adamc@198: adamc@198: adamc@284: val main : unit -> transaction page = fn () => return adamc@198:
  • None1
  • adamc@198:
  • Some1
  • adamc@198:
  • None2
  • adamc@198:
  • Some2
  • adamc@198: