Method #dequeue

async/channel.ts:709–717

* Pops the head value from the ring buffer. If a sender is waiting, its * value is promoted into the freed slot.

()

   * value is promoted into the freed slot.
   */
  #dequeue(): T {
    const value = this.#buffer.popFront()!;
    const sender = this.#nextSender();
    if (sender) {
      this.#buffer.pushBack(sender.value);
      sender.res();
    }
    return value;
  }

  #receiveError(): unknown {
    if (this.#hasCloseReason) return this.#closeReason;