关键词: 基于类的面向对象语言 基于原型的面向对象语言 西对象演算

Abstract: Due to the development of more and more large and complex computing systems, software systems are always required to be changed at run-time. However, in the software systems that are developed using the traditional class-based object-oriented languages, t

Key words: Class-based object-oriented language, Prototype-based object-oriented language, Delegate, Delegation, Φ object calculus