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=-0.9 required=5.0 tests=BAYES_00,FORGED_GMAIL_RCVD, FREEMAIL_FROM autolearn=no autolearn_force=no version=3.4.4 X-Google-Thread: 103376,bb7cc916bd63ab43 X-Google-Attributes: gid103376,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!postnews.google.com!m2g2000vbp.googlegroups.com!not-for-mail From: Maciej Sobczak Newsgroups: comp.lang.ada Subject: Re: Performance of element access in Vector Date: Tue, 20 Jan 2009 00:03:03 -0800 (PST) Organization: http://groups.google.com Message-ID: References: <0a8baaf0-19f7-40c0-a041-884e93fa7020@w39g2000prb.googlegroups.com> NNTP-Posting-Host: 128.141.45.238 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Trace: posting.google.com 1232438583 666 127.0.0.1 (20 Jan 2009 08:03:03 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Tue, 20 Jan 2009 08:03:03 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: m2g2000vbp.googlegroups.com; posting-host=128.141.45.238; posting-account=bMuEOQoAAACUUr_ghL3RBIi5neBZ5w_S User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10.5; en-US; rv:1.9.0.4) Gecko/2008102920 Firefox/3.0.4,gzip(gfe),gzip(gfe) Xref: g2news2.google.com comp.lang.ada:4419 Date: 2009-01-20T00:03:03-08:00 List-Id: On 20 Sty, 03:17, "Randy Brukardt" wrote: > What happens in C++ when the element whose reference you are using is > deleted? Formally speaking - undefined behavior. The difference is, however, that it is possible to use vectors in C++ without going into undefined behavior, whereas it seems to be impossible to use Vectors in Ada without being slow. I think that given two correct programs a typical customer will pick the faster one. -- Maciej Sobczak * www.msobczak.com * www.inspirel.com Database Access Library for Ada: www.inspirel.com/soci-ada