Journal ArticleDOI
An introduction to Trellis/Owl
Craig Schaffert,Topher Cooper,Bruce Bullis,Mike Kilian,Carrie Wilpolt +4 more
- Vol. 21, Iss: 11, pp 9-16
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TLDR
The basic elements of the Trellis/Owl language, objects, are discussed and it is shown how these are specified and implemented using types, operations, and components.Abstract:
Trellis/Owl is an object-based language incorporating a type hierarchy with multiple inheritance and compile-time type checking. The combination of features in the language facilitates the design, implementation, and evolution of large computer programs. This paper provides an brief introduction to the Trellis/Owl language. It discusses the basic elements of the language, objects, and shows how these are specified and implemented using types, operations, and components. The notion of a type hierarchy is introduced by a discussion of subtyping and inheritance. Other elements of the Trellis/Owl language such as type generators, iterators, and exceptions are briefly presented.read more
Citations
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Journal ArticleDOI
A behavioral notion of subtyping
Barbara Liskov,Jeannette M. Wing +1 more
TL;DR: This paper presents a way of specifying types that makes it convenient to define the subtype relation, and discusses the ramifications of this notion of subtyping on the design of type families.
Journal Article
Designing reusable classes
Ralph E. Johnson,Brian Foote +1 more
TL;DR: This paper describes what it is like to design systems in Smalltalk and how classes are developed so that they will be reusable.
Book ChapterDOI
The object-oriented database system manifesto
Malcolm Atkinson,David J. DeWitt,David Maier,François Bancilhon,Klaus R. Dittrich,Stanley B. Zdonik +5 more
TL;DR: In this article, the main features and characteristics that a system must have to qualify as an object-oriented database system are defined and separated into three groups: mandatory, mandatory, open and optional.
Proceedings ArticleDOI
Self: The power of simplicity
David Ungar,Randall B. Smith +1 more
TL;DR: Because Self does not distinguish state from behavior, it narrows the gaps between ordinary objects, procedures, and closures and offers new insights into object-oriented computation.
Book ChapterDOI
Optimization of Object-Oriented Programs Using Static Class Hierarchy Analysis
TL;DR: In this article, a complete inheritance graph of a program is examined, which is called class hierarchy analysis, and the compiler can improve the quality of static class information and thereby improve run-time performance.
References
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Book
Smalltalk-80: The Language and its Implementation
Adele E. Goldberg,David Robson +1 more
TL;DR: This book is the first detailed account of the Smalltalk-80 system and is divided into four major parts: an overview of the concepts and syntax of the programming language, a specification of the system's functionality, and an example of the design and implementation of a moderate-size application.
Journal ArticleDOI
Abstraction mechanisms in CLU
TL;DR: This paper provides an introduction to the abstraction mechanisms in CLU by means of programming examples, and it is shown how CLU programs may be written to use and implement abstractions.
Journal ArticleDOI
Abstraction mechanisms in CLU
TL;DR: This paper provides an introduction to the abstraction mechanisms in CLU and illustrates the utility of the three kinds of abstractions in program construction and shows how CLU programs may be written to use and implement abstractions.
Book
CLU: Reference Manual
TL;DR: This document serves both as an introduction to CLU and as a language reference manual that describes each aspect of CLU in detail, and discusses the proper use of various features.