From -62123117394399668 X-Google-Language: ENGLISH,ASCII X-Google-Thread: f78e5,7458762a2c3b301d X-Google-Attributes: gidf78e5,public X-Google-ArrivalTime: 2001-08-24 10:22:00 PST Path: archiver1.google.com!newsfeed.google.com!newsfeed.stanford.edu!newsfeeds.belnet.be!news.belnet.be!colt.net!dispose.news.demon.net!news.demon.co.uk!demon!mail2news.demon.co.uk!not-for-mail From: joerg.barfurth@attglobal.net (Joerg Barfurth) Newsgroups: comp.std.c++ Subject: Re: Are literals const? Date: Fri, 24 Aug 2001 17:20:58 GMT Organization: My beloved Family Approved: Fergus Henderson , moderator of comp.std.c++ Message-ID: <1eymcil.1ha1g1s152ktroN%joerg.barfurth@attglobal.net> References: <7dc3b1ea.0108220617.421ee131@posting.google.com> <9m24k7$e2d$1@glue.ucr.edu> X-Trace: mail2news.demon.co.uk 998673664 mail2news:1137 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) MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 User-Agent: MacSOUP/D-2.4.6 (unregistered for 409 days) Content-Transfer-Encoding: quoted-printable X-MIME-Autoconverted: from 8bit to quoted-printable by mulga.cs.mu.OZ.AU id DAA27978 Lines: 38 Xref: archiver1.google.com comp.std.c++:7122 wrote: > Until recently I though that only lvalues could be const, but rvalues > of struct/class types have a this-pointer by which their member > functions can modify them. So: >=20 > struct Stuff { > void bar() const; > void baz(); > }; >=20 > const Stuff foo(); >=20 > int main() { > foo().bar(); // cool > foo().baz(); // error -- violates constness of rvalue foo(). > } >=20 > That wedge opens the door for both const and volatile rvalues of all > types. (I'm still getting used to the notion.) No. It opens the door only for const and volatile rvalues of class type. rvalues of non-class types are not cv-qualified. Regards, J=F6rg --=20 J=F6rg Barfurth joerg.barfurth@attglobal.net <<<<<<<<<<<<< using std::disclaimer; <<<<<<<<<<<<<<<<<<<<<<<<<<<< Software Developer http://www.OpenOffice.org StarOffice Configuration http://www.sun.com/staroffice --- [ 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 ]