By C. A. R. Hoare, He Jifeng (auth.), Rachid Guerraoui (eds.)
\My tailor is Object-Oriented". such a lot software program structures which were equipped - cently are claimed to be Object-Oriented. Even older software program structures which are nonetheless in advertisement use were upgraded with a few OO ?avors. the variety of parts the place OO may be considered as a \must-have" function appears to be like as huge because the variety of elds in machine technology. If we follow one of many unique perspectives of OO, that's, to create cost-e ective software program options via modeling ph- ical abstractions, the applying of OO to any eld of laptop technology does certainly make experience. There are OO programming languages, OO working s- tems, OO databases, OO speci cations, OO methodologies, and so on. So what does a convention on Object-Oriented Programming quite suggest? I in truth don’t comprehend. What i know is that, considering the fact that its construction in 1987, ECOOP has been attracting a great number of contributions, and ECOOP meetings have ended up with top quality technical courses, that includes attention-grabbing combos of concept and perform. one of the 183 preliminary submissions to ECOOP’99, 20 papers have been chosen for inclusion within the technical application of the convention. each paper used to be reviewed via 3 to ve referees. the choice of papers was once conducted in the course of a t- day application committee assembly on the Swiss Federal Institute of know-how in Lausanne. Papers have been judged in accordance with their originality, presentation qu- ity, and relevance to the convention topics.
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Example text
R. Hoare, He Jifeng For any subset X of A∗ we define sht(X) as the set of shortest traces of X sht(X) =df {s ∈ X | ∀t ∈ X • t ≤ s ⇒ t = s} From the fact that n = {} we conclude that neither sht(l) nor sht(m) is empty. Consider the following cases: (1) sht(l) ∩ sht(m) = {}: From the determinacy it follows that l=m (2) sht(l) ∩ sht(m) = {}: From the assumption that l n and m that ∀u ∈ sht(l)∃v ∈ sht(m) • (u ≤ v ∨ v ≤ u) and n it follows ∀v ∈ sht(m)∃u ∈ sht(l) • (u ≤ v ∨ v ≤ u) (2a) ∀u ∈ sht(l)∃v ∈ sht(m) • v ≤ u: From the bisimulation property it follows that m l (2b) ∀v ∈ sht(m)∃u ∈ sht(l) • u ≤ v: In this case we have l m (2c) There exist u, u ˆ ∈ sht(l) and v, vˆ ∈ sht(m) such that u < v and vˆ < uˆ Let ∗ j =df min{length(s) | s ∈ sht(l → n)} ∗ k =df min{length(t) | t ∈ sht(m → n)} From u ≤ v we conclude that j > k, and from vˆ < u ˆ we have j < k, which leads to contradiction.
Submitted for publication, 1998 [Chi95] S. Chiba. A Metaobject Protocol for C++. In Proceedings of the 10th Annual Conference on Object-Oriented Programming, Systems, Languages and Applications (OOPSLA’95), ACM SIGPLAN Notices, vol. 30, no. 10, 1995, pp. html [CN98] S. Cohen and L. M. Northrop. Object-Oriented Technology and Domain Analysis. In [DP98], pp. 86-93 [Cza98] K. Czarnecki. Generative Programming: Principles and Techniques of Software Engineering Based on Automated Configuration and Fragment-Based Component Models.
A layer drawn on top of another layer refines the latter by adding new functionality. In general, a layer may contain more than one alternative component. g. LenList may take PtrList as its parameter. A layer containing a dashed rectangle is optional (see [Cza98] for details of this notation). The bottom layer is referred to as a configuration repository (abbr. Config). A configuration repository provides types needed by the other layers under standardized names. It works as a kind of registry, which components may use to retrieve configuration information from and also to exchange such information among each other.