From -2513483554347092042 X-Google-Thread: f78e5,84b1489db50fe20d X-Google-Attributes: gidf78e5,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news1.google.com!news1.google.com!news.glorb.com!news.alt.net!comp-std-cpp-robomod!not-for-mail From: WaterWalk Newsgroups: comp.std.c++ Subject: Re: static member function and const Date: Tue, 13 Nov 2007 10:30:28 CST Organization: http://groups.google.com Lines: 27 Approved: Fergus Henderson , moderator of comp.std.c++ Message-ID: <1194951083.392631.283220@e34g2000pro.googlegroups.com> References: <1194932017.215138.261760@e9g2000prf.googlegroups.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" X-Trace: posting.google.com 1194951083 25536 127.0.0.1 (13 Nov 2007 10:51:23 GMT) X-Complaints-To: groups-abuse@google.com NNTP-Posting-Date: Tue, 13 Nov 2007 10:51:23 +0000 (UTC) Return-Path: X-Authentication-Warning: mulga.csse.unimelb.edu.au: fjh set sender to devnull@stump.algebra.com using -f X-Robomod: STUMP, ichudov@algebra.com (Igor Chudov) X-Original-To: std-c++@mailman.ucar.edu Delivered-To: std-c++@mailman.ucar.edu X-SMTP-Auth: no User-Agent: G2/1.0 X-HTTP-UserAgent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071025 Firefox/2.0.0.9,gzip(gfe),gzip(gfe) Complaints-To: groups-abuse@google.com Injection-Info: e34g2000pro.googlegroups.com; posting-host=219.131.196.66; posting-account=ps2QrAMAAAA6_jCuRt2JEIpn5Otqf_w0 X-Virus-Scanned: amavisd-new at ucar.edu X-Virus-Scanned: amavisd-new at csse.unimelb.edu.au X-Virus-Scanned: amavisd-new at csse.unimelb.edu.au Xref: g2news1.google.com comp.std.c++:9603 On Nov 13, 3:43 pm, "subramanian10...@yahoo.com, India" wrote: > why can't a static member function be declared as const ? > We can declare a non-static member function as const, > to indicate that it does not modify the non-mutable data > members of a class. In the same way, is there a provision > to indicate that a static member function does not modify > the static data members but only uses their values ? > I think one reason to use const member function is that if the function is called via a const class object, then there shall be some way to inform the compiler that "this function does not modify the object". But a static member function call don't need a object of that class. So I don't think there is a need for const static member function. If you don't want a static member function modify a static member, just take some care not to modify. Or you may use a const reference to that static data member inside you static member function. --- [ 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.comeaucomputing.com/csc/faq.html ]