OOPS-Algol :an extension to PS-Algol to support object-orientated programming : a thesis presented in partial fulfilment of the requirements for the degree of Master of Science at Massey University

Abstract

Object-oriented programming is becoming a widely accepted paradigm to promote software reuse and data abstraction. Many languages are having object oriented capabilities added to them.

PS-Algol is a language which supports procedures as first class data, and supports orthogonality of per­sistence. OOPS-Algol extends the PS-Algol language to support object-oriented programming.

OOPS-Algol is different from most other object­ oriented languages in that it explicitly separates the implementation of a class's protocol from the descrip­tion of that protocol. The class hierarchy is used solely for defining the conceptual relationships between classes. The inheritance hierarchy is used to promote code sharing, without being constrained by the class hierarchy. This capability furthers progress towards the goal of separating the conceptual design of a system from its implementation.