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: 103376,64fe8f87aae99538 X-Google-Attributes: gid103376,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!postnews.google.com!n58g2000hsf.googlegroups.com!not-for-mail From: george.priv@gmail.com Newsgroups: comp.lang.ada Subject: Re: How to return an empty aggregate Date: Wed, 2 Apr 2008 22:02:37 -0700 (PDT) Organization: http://groups.google.com Message-ID: References: NNTP-Posting-Host: 166.129.248.79 Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit X-Trace: posting.google.com 1207198957 11334 127.0.0.1 (3 Apr 2008 05:02:37 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Thu, 3 Apr 2008 05:02:37 +0000 (UTC) Complaints-To: groups-abuse@google.com Injection-Info: n58g2000hsf.googlegroups.com; posting-host=166.129.248.79; posting-account=VnNb3AoAAACTpRtCcTrcjmPX7cs92k1Q User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.8.1.13) Gecko/20080311 Firefox/2.0.0.13,gzip(gfe),gzip(gfe) Xref: g2news1.google.com comp.lang.ada:20768 Date: 2008-04-02T22:02:37-07:00 List-Id: On Apr 2, 3:19 am, Maciej Sobczak wrote: > On 1 Kwi, 17:00, Robert A Duff wrote: > > > return (null record); > > Same thing - segfault at runtime depending on the order of progenitors > in interface composition (see my reply to Adam). > > -- > Maciej Sobczak *www.msobczak.com*www.inspirel.com Sorry, maybe I am missing something but what's practical sense of having non-abstract null record implementation of interface(s)? I am curious if there is real-life implication of such a construct? George.