如何使“這個”含蓄？

Question

我有一個類實例應該隱式傳遞給這個類的方法。 像這樣的東西：

class Game(player: Player) {
  protected implicit val implicitThis = this // This is the workaround I use now

  def play = player.makeMove() // makeMove takes an implicit game: Game
}

Answer 1

您可以將其打包成特質。

trait ImplicitMe {
  protected implicit def implicitMe: this.type = this
}

class Game extends ImplicitMe {
  private def foo(implicit g: Game) = g
  def bar = foo
}

（也可能想在特性上添加@inline 。）