Elaboration Order Issues in Ada 9 X Mats Webe r Swiss Federal Institute of Technolog y Software Engineering Laboratory 1015 Lausanne Switzerlan d e-mail : weber@lglsun .epfl.ch In Ada 80, the rules governing the order of elaboration of library units left everything up to th e language translator. This would be fine if it were feasible, but it isn't : during the review of th e Ada 80 document, it was discovered that deciding whether or not an Ada program wa s elaboratable led to solving undecidable problems . As a consequence, the approach adopted in Ada 83 left nearly all the work to the programme r (introducing pragma Elaborate) . It will be shown here that an approach somewhere betwee n Ada 80 and Ada 83 is feasible at reasonable cost, easing the maintenance and development o f large programs in a substantial way . L Why pragma Elaborate Messes Up Program s The following example shows why the use of pragma Elaborate is "contagious", that is, if it i s needed for one library unit, then it must be added to many others in order to achieve th e desired effect . This is obviously a
End of preview. The entire article is 13 pages. To view the full-text, please rent this article to continue.
/lp/association-for-computing-machinery/elaboration-order-issues-in-ada-9x-YCTYvxoyqS
Welcome to DeepDyve! Rent Premier Research Articles and Save Up to 90%
Elaboration order issues in Ada 9X
Weber, Mats
Follow ACM SIGAda Ada Letters
, Volume XIII (1)
Association for Computing Machinery – Jan 1, 1993
More Info
More Like This Article
View All dataSource[]=actageo&dataSource[]=aspet&dataSource[]=aaos&dataSource[]=aacc&dataSource[]=aacr&dataSource[]=aea&dataSource[]=aip&dataSource[]=ajnr&dataSource[]=ams&dataSource[]=aps_physical&dataSource[]=appi_book&dataSource[]=appi_journal&dataSource[]=apha&dataSource[]=asip&dataSource[]=asm&dataSource[]=asn&dataSource[]=aspb&dataSource[]=avs&dataSource[]=annual_reviews&dataSource[]=arxiv&dataSource[]=acm&dataSource[]=berghahn&dataSource[]=cabi&dataSource[]=clinical_trials&dataSource[]=dailymed&dataSource[]=degruyter&dataSource[]=du_press&dataSource[]=esa&dataSource[]=eu_press&dataSource[]=elsevier&dataSource[]=emerald&dataSource[]=ejtr&dataSource[]=emea&dataSource[]=epo&dataSource[]=faseb&dataSource[]=gsa&dataSource[]=health_affairs&dataSource[]=hindawi&dataSource[]=imanager&dataSource[]=imedpub&dataSource[]=informa_healthcare&dataSource[]=informs&dataSource[]=iop&dataSource[]=iucr&dataSource[]=iospress&dataSource[]=jbjs&dataSource[]=leftcoast&dataSource[]=lu_press&dataSource[]=mesharpe&dataSource[]=mary_ann_liebert&dataSource[]=medline&dataSource[]=mit_press&dataSource[]=nature&dataSource[]=oxford&dataSource[]=pier_professional&dataSource[]=pnas&dataSource[]=portlandpress&dataSource[]=psyc_articles&dataSource[]=psyc_books&dataSource[]=psyc_critiques&dataSource[]=plos_journal&dataSource[]=pubmed_central&dataSource[]=rsna&dataSource[]=rockefeller&dataSource[]=rcn&dataSource[]=ria&dataSource[]=rsc&dataSource[]=sage&dataSource[]=spie&dataSource[]=springer_journal&dataSource[]=springer&dataSource[]=taylor_francis&dataSource[]=aps&dataSource[]=the_scientist&dataSource[]=uc_press&dataSource[]=uspto_abstract&dataSource[]=wiley&dataSource[]=pct
© 2012 DeepDyve, Inc. All rights reserved.
Terms of Service | Privacy Policy
