基于面向对象概念的PARSER

PARSER BASED ON THE OBJECT-ORIENTED CONCEPTS

本文给出了一个骨架：如何用类以及类分层来建造一个递归下降扫描程序。使用类来组织Ｐａｒｓｅｒ的实现有很多优点，促使程序易于理解和修改，能方便地实现从ＢＮＦ生成规则到Ｐａｒｓｅｒ生成的自动处理。

This paper gives a brief sketch of how to build a recursive descent parser using classes and a hierarchy of classes.The advantages gained from the use of classes to organize the implementation of the parser, making it easier to understand and modify. It is fanly to automate the process of generating parser from BNF style production rules.