Smalltalk-80: the language and its implementation
Smalltalk-80: the language and its implementation
A semantics of multiple inheritance.
Proc. of the international symposium on Semantics of data types
On understanding types, data abstraction, and polymorphism
ACM Computing Surveys (CSUR) - The MIT Press scientific computation series
A model and temporal proof system for networks of processes
Distributed Computing
The Philips object-oriented parallel computer
Proc. of the IFIP TC 10 working conference on Fifth generation computer architectures
An introduction to Trellis/Owl
OOPLSA '86 Conference proceedings on Object-oriented programming systems, languages and applications
Encapsulation and inheritance in object-oriented programming languages
OOPLSA '86 Conference proceedings on Object-oriented programming systems, languages and applications
Object-oriented concurrent programming
Object-oriented concurrent programming
SIMULA: an ALGOL-based simulation language
Communications of the ACM
Operational semantics of a parallel object-oriented language
POPL '86 Proceedings of the 13th ACM SIGACT-SIGPLAN symposium on Principles of programming languages
Foundations of Actor Semantics
Foundations of Actor Semantics
A solution to the explicit/implicit control dilemma
OOPSLA/ECOOP '90 Proceedings of the workshop on Object-based concurrent programming
Inheritance of interface specifications (extended abstract)
IDL '94 Proceedings of the workshop on Interface definition languages
A concurrency abstraction model for avoiding inheritance anomaly in object-oriented programs
Compiler optimizations for scalable parallel systems
ECOOP '93 Proceedings of the 7th European Conference on Object-Oriented Programming
Behavioral interface specification languages
ACM Computing Surveys (CSUR)
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We have investigated the concepts of inheritance and subtyping in order to integrate them in a parallel object-oriented language. In doing so, we have concluded that inheritance and subtyping are two different concepts, which should not be confused in any object-oriented language (be it parallel or sequential). Inheritance takes place on the implementation level of classes, and it is a convenient mechanism for code sharing. It can be supported, for example, by introducing inheritance packages into a programming language. Subtyping deals with the message interface of objects, and it leads to a conceptual hierarchy based on behavioural specialization. Subtyping should take place on the basis of specifications of the external behaviour of objects, and as much as possible of these specifications should be formal. Some specific problems with introducing these two concepts into a parallel language are also discussed.