SM.empty))
| three func _ _ (_, es) = badArgs (func, es)
+fun noneV func f (evs, []) = (f evs;
+ SM.empty)
+ | noneV func _ (_, es) = badArgs (func, es)
+
fun oneV func (name, arg) f (evs, [e]) =
(case arg e of
NONE => badArg (func, name, e)
fun container_none name (f, g) = registerContainer (name, none name f, g)
fun container_one name args (f, g) = registerContainer (name, one name args f, g)
+fun containerV_none name (f, g) = registerContainer (name, noneV name f, g)
fun containerV_one name args (f, g) = registerContainer (name, oneV name args f, g)
type env = SS.set * (typ * exp option) SM.map * SS.set