如何修复Discord机器人的“Declaration or statement expected”报错？

我是新手开发者，用Node.js v16.20.2开发Discord机器人，目前卡在「Declaration or statement expected」或「Unexpected Token」报错上，报错位置指向代码里的.play(queueConstruct.songs[0], message, client)语句。之前试过添加一段流媒体处理代码，结果问题更严重；移除.play前的点后，又出现其他未知报错，求帮忙解决。

相关代码 #

const { play } = require("../include/play");
const { Client, Collection, MessageEmbed } = require("discord.js");
const { attentionembed } = require("../util/attentionembed");
const {approveemoji,denyemoji,PREFIX,} = require(`../config.json`);
const ytsr = require("youtube-sr");

async execute(message, args, client) {
    if (!message.guild) return;
    const { channel } = message.member.voice;
    const serverQueue = message.client.queue.get(message.guild.id);
    if (!channel) return attentionembed(message, "Please join a Voice Channel first");
    if (serverQueue && channel !== message.guild.me.voice.channel)
      return attentionembed(message, `You must be in the same Voice Channel as me`);
    if (!args.length)
      return attentionembed(message, `Usage: ${message.client.prefix}play <YouTube URL or Video Name>`);
    //react with approve emoji
    message.react(approveemoji).catch(console.error);
    const permissions = channel.permissionsFor(message.client.user);
    if (!permissions.has("CONNECT"))
      return attentionembed(message, "I need permissions to join your channel!");
    if (!permissions.has("SPEAK"))
      return attentionembed(message, "I need permissions to speak in your channel");

//...//

    try {
      .play(queueConstruct.songs[0], message, client),
      catch (error) {
      //if an error comes log
      console.error(error);
      //delete the Queue
      message.client.queue.delete(message.guild.id);
      //leave the channel
      await channel.leave();
      //sent an error message
      return attentionembed(message, `Could not join the channel: ${error}`); 
    }
  };

曾尝试添加的代码 #

let stream = null; 
      if (song.url.includes("youtube.com")) {

        stream = await ytdl(song.url);
  stream.on('error', function(er)  {
        if (er) {
          if (queue) {
          queue.songs.shift();
          play(queue.songs[0]);
        return sendError(`An unexpected error has occurred.\nPossible type \`${er}\``, message.channel)
            }
          }
      });
  }
      queue.connection.on("disconnect", () => message.client.queue.delete(message.guild.id));

        const dispatcher = queue.connection
           .play(ytdl(song.url, {quality: 'highestaudio', highWaterMark: 1 << 25 ,type: "opus"}))
           .on("finish", () => {
             const shiffed = queue.songs.shift();
              if (queue.loop === true) {
                  queue.songs.push(shiffed);
              };
            play(queue.songs[0])
          })

问题分析与解决方法 #

1. 核心语法错误：
   你通过const { play } = require("../include/play");解构导入了play函数，它是一个独立函数，不是某个对象的方法，所以不能用.play()调用，直接写play(queueConstruct.songs[0], message, client)即可。

2. try/catch语法错误：
   你的代码里try块结尾多了个逗号，正确语法是try { 执行代码 } catch (error) { 错误处理 }，需要把逗号删掉。

3. 修复后的关键代码片段：

try {
  play(queueConstruct.songs[0], message, client);
} catch (error) {
  //if an error comes log
  console.error(error);
  //delete the Queue
  message.client.queue.delete(message.guild.id);
  //leave the channel
  await channel.leave();
  //sent an error message
  return attentionembed(message, `Could not join the channel: ${error}`); 
}

4. 额外注意点：
   • 尝试添加的流媒体代码里，要确保已导入ytdl-core（const ytdl = require('ytdl-core');），否则会报错找不到ytdl。
   • 检查sendError函数是否已定义或导入，queue变量是否在当前作用域内有效。

内容的提问来源于stack exchange，提问作者Kikiyama