HarmonyOS 是否支持匿名类，匿名类如何写

ArkTS不支持匿名类，建议使用嵌套类实现（类内部嵌套匿名类）。因为使用匿名类创建的对象类型未知，这与ArkTS不支持structural typing和对象字面量的类型冲突，可以参考以下方案：

export interface IVoiceRecordListener<T> {
  onSuccess: (t: T) => void
  onFailed: (code: string, reason: string) => void
}

let voiceRecordListenerInstance: IVoiceRecordListener<void> = {
  onSuccess: () => {
    console.log('success')
  },
  onFailed: () => {
    console.log('failed')
  }
}

或

// 原先
class A {
  foo() {
    let a = new class {
      v: number = 123
    }();
  }
}
// 现在
class A {
  foo() {
    class B {
      v: number = 123
    }
    let b = new B();
  }
}