aqua-playground/aqua/examples/recursiveStreams.aqua

service YesNoService("yesno"):
  get() -> string

func recursiveStream() -> []string, []string:
  result: *string
  loop: *string
  loop <<- "yes"
  for l <- loop:
    if l == "yes":
      loop <- YesNoService.get()
    result <<- "success"
  <- result, loop