泛型Scala-trait的类型匹配

我只是想了解一下泛型，我想知道是否有更好的方法来实现以下目标：

我有一个密封的trait，它有一个抽象名称和一个重写的equals（）。我希望重写的等于在类型和名称上都匹配。下面是我所拥有的

sealed trait NamedCampaign[A <: NamedCampaign] {
  def name: String

  override def equals(obj: Any): Boolean = obj match {
    case x: A => x.name == this.name
    case _ => false
  }
}

case class AdCampaign(name: String, objective: String, status: String, buyingType: String) extends NamedCampaign[AdCampaign]
case class AdSet(name: String, status: String, dailyBudget: Int, lifetimeBudget: Int, startTime: Int, endTime: Int, campaign: String) extends NamedCampaign[AdSet]

sealed trait NamedCampaign[A x.name==this.name
大小写=>false
}
}
案例类AdCampaign（名称：String，目标：String，状态：String，buyingType:String）扩展了NamedCampaign[AdCampaign]
案例类AdSet（名称：String，状态：String，dailyBudget:Int，lifetimeBudget:Int，startTime:Int，endTime:Int，campaign:String）扩展了NamedCampaign[AdSet]

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用外行的话说，如果两个对象是同一个类且具有相同的名称，我希望它们被认为是相等的。有没有更好/更快/更惯用的方法来做到这一点？

由于擦除，您拥有的东西无法工作。运行时不知道类型

a

改编自：

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我的两分钱：我认为在一个case类上重写

equals

永远都不合适。当你想要比较所有字段时（比如说，在单元测试中，你很可能想要这么做），你会后悔的.

Hmmmm，这似乎比手工写出两个case类的equals方法更复杂。由于可能只剩下一个case类，您能看到使用类型反射和混合特征的好处吗？

sealed trait NamedCampaign[A <: NamedCampaign] {
  implicit def classTagA: ClassTag[A]
  def name: String
  override def equals(obj: Any): Boolean = obj match {
    case classTagA(x) => x.name == this.name
    case _ => false
  }
}

case class AdCampaign(name: String, objective: String, status: String,
  buyingType: String)(implicit val classTagA: ClassTag[AdCampaign])
  extends NamedCampaign[AdCampaign]

case class AdSet(name: String, status: String, dailyBudget: Int,
  lifetimeBudget: Int, startTime: Int, endTime: Int, campaign: String)
  (implicit val classTagA: ClassTag[AdSet]) extends NamedCampaign[AdSet]

sealed trait NamedCampaign {
  def name: String
  def canEqual(that: Any): Boolean
  override def equals(other: Any): Boolean = other match {
    case that: NamedCampaign => (that canEqual this) &&
                                (this.name == that.name)
    case _ => false
  }
}

case class AdCampaign(name: String, objective: String, status: String,
    buyingType: String) extends NamedCampaign {
  override def canEqual(that: Any) = that.isInstanceOf[AdCampaign]
}

case class AdSet(name: String, status: String, dailyBudget: Int,
    lifetimeBudget: Int, startTime: Int, endTime: Int, campaign: String)
    extends NamedCampaign {
  override def canEqual(that: Any) = that.isInstanceOf[AdSet]
}