From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on polar.synack.me X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00,FREEMAIL_FROM autolearn=unavailable autolearn_force=no version=3.4.4 Path: eternal-september.org!reader01.eternal-september.org!reader02.eternal-september.org!feeder.eternal-september.org!aioe.org!.POSTED!not-for-mail From: Victor Porton Newsgroups: comp.lang.ada Subject: Why stack can hold indefinite objects but records cannot? Date: Tue, 28 Nov 2017 22:31:01 +0200 Organization: Aioe.org NNTP Server Message-ID: NNTP-Posting-Host: edFHTOfx8phAphItWrZ8cQ.user.gioia.aioe.org Mime-Version: 1.0 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 7Bit X-Complaints-To: abuse@aioe.org User-Agent: KNode/4.14.10 X-Notice: Filtered by postfilter v. 0.8.2 Xref: reader02.eternal-september.org comp.lang.ada:49221 Date: 2017-11-28T22:31:01+02:00 List-Id: Why is it OK to create an indefinite object as a local variable ("on stack") but not OK to put an indefinite object into a record? How records are less powerful than the stack? By the way, how indefinite local variables can be implemented? (just curious) Moreover, wouldn't it to be a good idea to allow indefinite objects in records (thus making the record itself indefinite, even if it has no discriminants)? I realize that then it would be difficult to track which records are definite and which indefinite. But what's about the idea? -- Victor Porton - http://portonvictor.org