Scala 从受自我类型约束的多个特征中定义一个特征

我有两个抽象类，如下所示：

abstract class BddAsyncSpec extends AsyncFeatureSpec
  with Matchers
  with GivenWhenThen
  with BeforeAndAfter
  with BeforeAndAfterAll

abstract class BddSpec extends FeatureSpec
  with Matchers
  with GivenWhenThen
  with BeforeAndAfter
  with BeforeAndAfterAll

正如您所看到的，mixin部分看起来是一样的。我的问题是，如何抽象mixin部分，当我添加更多trait时，它将应用于BddAsyncSpec和BddSpec。

试试看

trait MyTraits extends Matchers
  with GivenWhenThen with BeforeAndAfter with BeforeAndAfterAll { this: Suite with Informing => }

abstract class BddAsyncSpec extends AsyncFeatureSpec with MyTraits
abstract class BddSpec extends FeatureSpec with MyTraits

我们使用的地方

因为，例如，Givenwhen需要通知

而且前后前后都需要套房

自我类型是一种指定特质需要什么才能融入的方式

试试看

trait MyTraits extends Matchers
  with GivenWhenThen with BeforeAndAfter with BeforeAndAfterAll { this: Suite with Informing => }

abstract class BddAsyncSpec extends AsyncFeatureSpec with MyTraits
abstract class BddSpec extends FeatureSpec with MyTraits

我们使用的地方

因为，例如，Givenwhen需要通知

而且前后前后都需要套房

---

自我类型是一种指定特质需要什么才能融入的方式

还有另一个共同特征吗

trait T1; trait T2
trait Common extends T1 with T2
abstract class BaseA; abstract class BaseB;
abstract class A extends BaseA with Common
abstract class B extends BaseB with Common

---

另一个特征是一组共同的特征

trait T1; trait T2
trait Common extends T1 with T2
abstract class BaseA; abstract class BaseB;
abstract class A extends BaseA with Common
abstract class B extends BaseB with Common

trait T1; trait T2
trait Common extends T1 with T2
abstract class BaseA; abstract class BaseB;
abstract class A extends BaseA with Common
abstract class B extends BaseB with Common