List[T] forSome {type T}和 之间有什么区别List[T forSome {type T}]？我如何用"英语"阅读它们？我应该如何神交的forSome关键字？有哪些实际用途forSome？什么是实用的,比简单的T forSome {type T}用法更复杂？
List[T] forSome {type T}
List[T forSome {type T}]
forSome
T forSome {type T}
types scala existential-type
existential-type ×1
scala ×1
types ×1