2,246 papers · page 109 of 113
Mentat, an object-oriented macro data flow system designed to facilitate parallelism in distributed systems, is presented.The macro data flow model is a model of computation similar to the data flow model with two principle differences: the computational complexity of the actors …
This paper describes an approach to object-oriented interface design that goes beyond mere object decomposition. In our user interface management system we use logic and filters to declaratively specify and control a space of ways that objects may be composed to create interfaces…
ThinkerToy is a graphical environment for modeling decision support problems. It provides a tableau on which such problems as landscape planning, service scheduling, and statistical analysis can be modeled and analyzed. Normally, complex mathematical and statistical modeling tech…
OTM is a concurrent object language presently being implemented at the University of Toronto. It provides a novel, simple and powerful way of structuring tasks or collections of operations. This paper describes the concurrency control features of OTM, which include external termi…
Object-oriented programming is a promising approach to the industrialization of the software development process. However, it has not yet been incorporated in a development method for large systems. The approaches taken are merely extensions of well-known techniques when 'program…
MELD combines concepts from data flow and object-oriented programming languages in a unique approach to tool reusability. MELD provides three units of abstraction — equations, classes and features — that together allow sufficient options for granularity and encapsulation to suppo…
CommonLoops is an object-oriented language embedded in Common Lisp. It is one of two such languages selected as starting points for the Common Lisp Object System (CLOS) which is currently being designed as a standard object-oriented extension to Common Lisp. This paper reports on…
Successful learning of an object-oriented programming style is greatly facilitated by a flexible, window-oriented interface and a “step-by-step” instructional methodology. Specifically, students can benefit from a learning sequence moving from working with object hierarchies to w…
We describe the use of object-oriented programming (OOP) in the design and implementation of TSA, a system for interactive time series and spectral analysis. We show how such features of OOP as inheritance, generic messages, and decomposition of the programming problem in terms o…
Many applications in such domains as computer-aided design require the capability to define, store and retrieve as a single unit a collection of related objects known as a composite object. A composite object explicitly captures and enforces the IS-PART-OF integrity constraint be…
Opus is a tool for rule-based programming which integrates a production system paradigm with the Smalltalk-80 environment. Opus currently provides a data-driven production system that allows the programmer considerable freedom, including access to the full functionality of the Sm…
Sloop is a parallel language and environment that employs an object-oriented model for explicit parallel programming of MIMD multiprocessors. The Sloop runtime system transforms a network of processors into a virtual object space. A virtual object space contains a collection of o…
This paper brings some perspective to various concepts in computational reflection. A definition of computational reflection is presented, the importance of computational reflection is discussed and the architecture of languages that support reflection is studied. Further, this p…
Traditional object-oriented systems tend to be single-user. As we move from personal to interpersonal computing, we must look for ways to extend our programming paradigms. This research extends the Smalltalk-80 system to send messages transparently to objects residing on remote m…
This paper describes a system for sharing information in the form of objects among users of the Smalltalk-80 programming environment. The system, called Coral3, is pragmatic in that it was developed to meet the needs of specific applications. This paper describes the expectations…
A functional simulator/editor for VLSI design has been implemented in the Smalltalk-801 system. Users can explore their designs in an highly interactive and graphical manner with “close-to-reality” tools. The traditional sequence of editing, compiling and simulating the circuit i…
The central idea behind this paper is that the discipline governing the exchange of messages between objects should be specifiable by the programmer in the form of an explicit law of the system. We show how, starting from a very primitive foundation, which presumes neither encaps…
BrouHaHa is a portable implementation of the Smalltalk-80 virtual machine interpreter. It is a more efficient redesign of the standard Smalltalk specification, and is tailored to suit conventional 32 bit microprocessors. This paper presents the major design changes and optimizati…
Most object-oriented languages are strong on reusability or on strong-typing, but weak on concurrency. In response to this gap, we are developing Hybrid, an object-oriented language in which objects are the active entities. Objects in Hybrid are organized into domains, and concur…
The Trellis programming environment supports programming in Trellis/Owl, an object-based language with multiple inheritance and compile-time type-checking. Trellis is composed of a number of integrated tools that share a common programming environment database. It is a highly int…