# Pastebin 41ADG9Iv

template pollFlowVar[T](flowVar: FlowVar[T], body: untyped): untyped =
  ## Handler for checking the result of a flowVar inside of an async proc.
  while true:
    # Check if the spawn FlowVar has finished.
    if flowVar.isReady():
      # If so, execute the handler body.
      body
    else:
      # Otherwise, yield in order to return control back to the main event loop.
      yield sleepAsync 1