enclosing class

基本解釋

A signature can embed a token that identifies the enclosing class or value type.
簽名中可以嵌入標(biāo)識封閉類或值類型的標(biāo)記。
Essentially, the compiler replaces the self keyword with the enclosing class's name. It is almost like the following line
基本上，編譯器會用所包含類的名稱替換 self 關(guān)鍵字。
In Scala, the enclosing class can't see a private member, but Scala provides another way to declare it visible to the enclosing class.
在Scala 里，則不能看到，但是Scala 提供了另外一種方式來聲明它對于包含它的外部類可見。