一种定制的、更高效的C++RTTI实现方法  

A Customized and More Efficient Method for C++ RTTI Realization

作　　者：苏常友[1] 文建国[1] 

机构地区：[1]湖南大学计算机与通信学院,长沙410082

出　　处：《微计算机信息》2011年第8期163-165,共3页Control & Automation

摘　　要：RTTI(Run-Time Type Information,运行时类型识别)是C++等面向对象编程语言的一种重要语言机制。目前流行的C++编译器中的RTTI实现机制在应用中存在一些不足,主要体现在动态类型转换操作的低效率和RTTI实现机制的不可定制性。本文通过分析研究标准C++的RTTI机制,提出一种基于元数据和宏,以可定制和高效率为目标的RTTI实现方法。在文章的最后仿真这种RTTI实现方法,证明其可行性和高效性(仿真数据其效率比为5.8)。RTTI is an important mechanism of object-oriented computer languages like C ＋＋,etc.In the currently prevalent C ＋＋ compiler,the RIIT mechanism still has some defects in its implementation,which is mainly embodied in the low efficiency of dynamic type-casting as well as the inability of customization in RIIT realization.Based on the analysis of the standard C＋＋ RTTI,this paper proposed a new method for RTTI realization which is based on metadata and macro,aiming to be customizable and of a higher efficiency.At last,a concrete C＋＋ RTTI realization is simulated in the end of this paper,which could be a testament of the complete feasibility and higher efficiency of this method（the efficient ratio is 5.8）.

关 键 词：C++语言 运行时类型识别 元数据 宏 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]