Ada++: object-oriented programming in Ada-83

Gateway to the New Millennium. 18th Digital Avionics Systems Conference. Proceedings (Cat. No.99CH37033) Pub Date : 1999-10-24 DOI:10.1109/DASC.1999.863690

R. A. Flatt, D. Brendemihl, C. Prather, J. H. Robb

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Abstract

Many Ada programmers have used object-oriented analysis (OOA) and object-oriented design (OOD) but have never been able to take full advantage of object technology because they could not implement object-oriented programming (OOP) in Ada-83. This paper describes a mechanism to implement OOP in Ada-83. Ada-83 is well suited for object based designs. Implementing the critical OOP features of inheritance and polymorphism in Ada-83 allows a programmer to move beyond an object-oriented design to an object design that utilizes object-oriented programming. By taking advantage of the strengths of both Ada-83 and OOP, software systems that are reliable, resilient to change, and easy to maintain can be developed. This paper provides details on the mechanism used to implement inheritance and polymorphism in Ada-83. This mechanism was developed for real-time applications that could not use Ada's tasking mechanism or dynamic memory allocation. Ada source code examples are provided to illustrate this OOP technique.

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Ada-83中的面向对象编程

许多Ada程序员已经使用了面向对象的分析(OOA)和面向对象的设计(OOD)，但是从来没有能够充分利用对象技术，因为他们无法在Ada-83中实现面向对象的编程(OOP)。本文描述了在Ada-83中实现面向对象的一种机制。Ada-83非常适合基于对象的设计。在Ada-83中实现继承和多态性的关键OOP特性允许程序员超越面向对象设计，进入利用面向对象编程的对象设计。通过利用Ada-83和OOP的优势，可以开发出可靠、可更改且易于维护的软件系统。本文详细介绍了Ada-83中用于实现继承和多态性的机制。这种机制是为不能使用Ada的任务机制或动态内存分配的实时应用程序开发的。提供了Ada源代码示例来说明这种面向对象技术。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Gateway to the New Millennium. 18th Digital Avionics Systems Conference. Proceedings (Cat. No.99CH37033)

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