Question

我正在尝试创建一个类的实例，但由于某种原因，构造函数没有运行。

首先我在这里定义类，然后将它传递给Server这样的新实例（有效）：

class MyMatchMaker extends MatchMaker {
  public autoStartClientCount: 2
}

new Server({
  matchMaker: MyMatchMaker
})

接下来，我接受传入的选项，并将默认值与用户定义的选项（工作）合并。然后我调用new this.settings.matchMaker(this)它会运行，并创建一个MyMatchMaker的新实例。

export interface MatchMakerType<T extends MatchMaker> {
  new(server: Server): MatchMaker
}

export interface Options {
  matchMaker: MatchMakerType<MatchMaker>
}

export class Server {
  private readonly matchMaker!: MatchMaker
  public readonly settings: Options
  public readonly ps: Partial<Options> = {
    matchMaker: undefined
  }

  public constructor(options: Options) {
    this.settings = Object.assign(this.ps, options) as Options
    this.matchMaker = new this.settings.matchMaker(this)
    console.log(this.matchMaker)
  }
}

创建了一个新实例，但是，此类的构造函数不会运行，也不会创建WaitList的新实例。

export abstract class MatchMaker {

  public waitList: WaitList = new WaitList

  public constructor(server: Server) {
    console.log('match maker')
  }
}

是什么导致这种情况发生？

当我转储this.matchMaker时，我在节点控制台中得到了这个（这包括我从上面修剪过的设置）：

MyMatchMaker {
  server:
   Server {
     clients: [],
     ps:
      { port: 5555,
        workers: -1,
        game: 'C:\\Users\\rnaddy\\Documents\\vscode\\projects\\red5-test\\build\\TickTacToe.js',
        type: 'websocket',
        redis: undefined,
        matchMaker: [Function: MyMatchMaker] },
     settings:
      { port: 5555,
        workers: -1,
        game: 'C:\\Users\\rnaddy\\Documents\\vscode\\projects\\red5-test\\build\\TickTacToe.js',
        type: 'websocket',
        redis: undefined,
        matchMaker: [Function: MyMatchMaker] },
     matchMaker: [Circular] },
  game: 'C:\\Users\\rnaddy\\Documents\\vscode\\projects\\red5-test\\build\\TickTacToe.js',
  autoStartClientCount: 2 }

构造函数不运行但是实例已创建

0 个答案: