子类型 [计] subtype
- 接下来的一种基本结构是子类型或 ROW 类型。
The next basic structure is the subtype or ROW type. - 结构类型仅制定了子类型必须支持的结构; 你可以把它们看作是“匿名”类型。
Structural types specify only the structure a subtype must support; you could think of them as “anonymous” types. - 针对这类问题的传统的面向对象的解决方案是利用子类型多态性 — 也就是说,继承。
The traditional object-oriented solution to problems of this sort is to leverage subtype polymorphism — that is, inheritance.
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