By Alan Borning, Tim O’Shea (auth.), Jean Bézivin, Jean-Marie Hullot, Pierre Cointe, Henry Lieberman (eds.)
In October 1983 an off-the-cuff assembly used to be equipped in Le Cap d'Agde with the aid of the BIGRE bulletin. Sixty humans grew to become out to listen to greater than ten shows on object-oriented programming. extra vital used to be their unanimous call for for different, extra based encounters. So, approximately 12 months later, the item crew was once created via AFCET. A moment workshop used to be equipped in Brest, and back twelve months later in Paris, every time displaying elevated attendance and curiosity. The good fortune of those conferences and the truth that related actions have been occurring in different eu nations, in particular nice Britain and Germany, ended in the belief of an annual ecu convention, offering a discussion board for theorists and practitioners attracted to the object-oriented programming paradigm. it truly is most unlikely to recognize the following the entire humans and enterprises that welcomed with nice enthusiasm the start of the ECOOP convention and contributed to its association. greater than 100 submissions have been obtained and this system committee had the disagreeable job of turning down many useful contributions. we are hoping, in spite of the fact that, that the choice of papers for ECOOP'87 emphasizes the elemental matters and difficulties of object-oriented programming and may element towards attention-grabbing destiny learn directions.
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Extra info for ECOOP’ 87 European Conference on Object-Oriented Programming: Paris, France, June 15–17, 1987 Proceedings
Suppose we want to sort arrays of objects. We can either define this behavior as an operation on arrays or create a new type. Since sorting is a complex operation, and since it does not need to know very much about the representation of the objects being sorted, we decide to create a type that is a sorter object. The primary operation of the sorter would be s o r t , which would take an array and return a sorted version of it. We would also define an abstract type Ordered which would define operations like g r e a t e r f h a n , less-than, and equal.
We assume that objects won’t change too often, and again that their offsprings are not too many. ). [Borning 861 proposes a definition of inheritance by augmenting a copy mechanism with a constmint mechanism t o support classification and updating. Unfortunately solving the updating problem doesn’t solve the memory occupation problem. 7 Conclusion In this paper, we have reviewed and discussed the main strategies proposed for inheritance (knowledge sharing) in object-oriented concurrent programming [Yonezawa & Tokoro 871.
In the examples above, Teacher and Student probably include complete implementations, but Keyboard h a n d le r may be an abstract type that just specifies the interface for. the type-in operations, and does not provide any implementations. Thus, as mentioned before, a supertype can be used to guarantee that a subtype provides a certain interface; multiple supertypes just make this capability easier. Since multiple supertypes can be used to merge implementations together, programmers are tempted to use supertyping even when it is inappropriate.