From -107683162445158990 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,1e33266bee377e X-Google-Attributes: gidf78e5,public From: David R Tribble Subject: Re: mutable member data vs. mutable functions Date: 2000/08/23 Message-ID: <39A421E2.7B349BFB@tribble.com>#1/1 X-Deja-AN: 661666626 Content-Transfer-Encoding: 7bit Approved: Fergus Henderson , moderator of comp.std.c++ References: <39A14420.F81235AA@bellatlantic.net> X-Accept-Language: en X-Authentication-Warning: mulga.cs.mu.OZ.AU: fjh set sender to devnull@stump.algebra.com using -f Content-Type: text/plain; charset=us-ascii X-Complaints-To: abuse@demon.net X-Mail2News-Path: news.demon.net!mulga.cs.mu.oz.au X-Trace: mail2news.demon.co.uk 967060286 mail2news:313 mail2news mail2news.demon.co.uk Organization: The Vast Right-Wing Conspiracy X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) MIME-Version: 1.0 NNTP-Posting-Date: Wed, 23 Aug 2000 14:15:05 CDT Newsgroups: comp.std.c++ Carl Nygard wrote: > Is there any reason why the mutable concept wasn't extended to > functions? For example, given the example: > [...] > Is there some way for the Standard to be tweaked to allow the mutable > keyword for functions, such that only functions marked mutable can > change mutable members. To external functions, mutable is the same as > const, but internally, only mutable functions may change mutable > members. I'm not sure this is a good idea. It would give us three kinds of member functions: a. Regular member functions (non-const, non-mutable) that (by virtue of not being declared const) are assumed to modify one or more data members. b. Const member functions, that are assumed to not modify any non-mutable data members. c. Mutable member functions, that are assumed to modify only mutable data members. I can't see a big difference between (a) and (c). -- David R. Tribble, mailto:david@tribble.com, http://david.tribble.com --- [ 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://reality.sgi.com/austern_mti/std-c++/faq.html ]