From 6737802315831106858 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,7c21e57f4a25e5f3 X-Google-Attributes: gidf78e5,public X-Google-ArrivalTime: 2001-05-08 19:26:04 PST Path: newsfeed.google.com!newsfeed.stanford.edu!skynet.be!dispose.news.demon.net!news.demon.co.uk!demon!mail2news.demon.co.uk!not-for-mail From: "James Kuyper Jr." Newsgroups: comp.std.c++ Subject: Re: deleted pointers in a container Date: Wed, 9 May 2001 02:25:15 GMT Organization: Not Enough Approved: Fergus Henderson , moderator of comp.std.c++ Message-ID: <3AF8A939.2148534A@wizard.net> References: <3AF0BE2C.F07A2FB7@acm.org> <3AF69057.1778277E@acm.org> <3af75302$0$1885@news.denver1.Level3.net> <3AF7F543.D6399AF8@wizard.net> <3af8463b$0$1883@news.denver1.Level3.net> X-Trace: mail2news.demon.co.uk 989375120 mail2news:17206 mail2news mail2news.demon.co.uk X-Complaints-To: abuse@demon.net X-Mail2News-Path: news.demon.net!mulga.cs.mu.oz.au X-Authentication-Warning: mulga.cs.mu.OZ.AU: fjh set sender to devnull@stump.algebra.com using -f X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) X-Accept-Language: en,es,de,ru MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Lines: 27 Xref: newsfeed.google.com comp.std.c++:4622 Brian Hanley wrote: ... > My question was, is a pointer-to-member-function necessarily considered > a plain old data (POD) type? Yes - section 3.9p10 defines POD types as including scalar types, and scalar types as include pointer to member types. > Am I mistaken that calling memcpy() on a (valid) instance of a class with > virtual functions does not necessarily yield a valid copy? No, per 3.9p2, that guarantee is only made for objects of POD type. ... > My point, then, is that specializing standard containers on pointer types in > order to use memcpy() ... > - Might allow us to copy invalid regular pointers, but > - Might break the copying of valid pointers-to-member-functions. Luckily, pointers-to-member-functions are POD types. --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.research.att.com/~austern/csc/faq.html ]