From -5777492351216852526 X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: f78e5,ede379f5dbbc1549 X-Google-Attributes: gidf78e5,public From: Max TenEyck Woodbury Subject: Re: Suggestion: "typeof" keyword Date: 1999/08/23 Message-ID: <37C1B67F.B5B0B51A@cds.duke.edu>#1/1 X-Deja-AN: 516333808 X-NNTP-Posting-Host: dukcds.cds.duke.edu Content-Transfer-Encoding: 7bit Approved: stephen.clamage@sun.com (comp.std.c++) References: <7nt3vl$1oe$1@nnrp1.deja.com> <7oh7o8$t3f$1@nnrp1.deja.com> <7ol6hi$ej9$2@news.BelWue.DE> <7oup0a$8g2$1@nnrp1.deja.com> <37B3C2AD.5AB722AE@lucent.com> <37B5A571.449B@wanadoo.fr> <37B908A8.717CAC2C@lucent.com> <7pcvjs$tk4$1@nnrp1.deja.com> <7phk8n$b26$1@nnrp1.deja.com> <37BD2185.C0047293@physik.tu-muenchen.de> <7pk6r6$689$1@nnrp1.deja.com> X-Accept-Language: en X-UID: 0000000001 X-Status: $$$T Content-Type: text/plain; charset=us-ascii Organization: Duke University, Durham, NC, USA Mime-Version: 1.0 Newsgroups: comp.std.c++ Originator: clamage@taumet 'const' and 'volatile' are distinct attributes from the basic type of a data item. If they appear at the top level, they should be removed. After all, the main purpose of 'typeof' is to allow correctly typed copies to be instanced. One of the reasons for making the copy of something is to manipulate it in some way while leaving the original unchanged. Preserving 'const' at the top level could prevent this. In the one bad example given, some trouble was taken to throw away 'const' at a lower level. The original was > any_type foo; > typeof(foo)* bar = &foo; > > And now assume any_type is int const. The correct way to do this would be: any_type foo; typeof(&foo) bar = &foo; With any_type as int const, bar's type is * int const. mtew@cds.duke.edu [ 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 ]