scala – 在这种情况下,tilde arrow是什么意思？

什么?>(波浪号箭头)运算符呢？我认为必须是HttpRequest的操作符,但我在喷涂API中找不到这样的运算符.

我可以弄清楚authorize是一个返回的函数(HttpRequest => HttpRequest),所以val rq必须是一个HttpRequest,它返回值后由authorize的返回函数应用.

def receive: Receive = {
    case query: String =>
      val body = HttpEntity(ContentType(MediaTypes.`application/x-www-form-urlencoded`),s"track=$query")
      val rq = HttpRequest(HttpMethods.POST,uri = uri,entity = body) ~> authorize
      sendTo(io).withResponsesReceivedBy(self)(rq)
    case ChunkedResponseStart(_) =>
    case MessageChunk(entity,_) => TweetUnmarshaller(entity).fold(_ => (),processor !)
    case _ =>
  }

提前致谢！