From -6367120516854307417 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: 1999/08/17 Message-ID: <37B98342.83E701F3@cds.duke.edu>#1/1 X-Deja-AN: 513838651 Content-Transfer-Encoding: 7bit Approved: Valentin Bonnard References: <7nt3vl$1oe$1@nnrp1.deja.com> <7oh7o8$t3f$1@nnrp1.deja.com> <7ol6hi$ej9$2@news.BelWue.DE> <7oup0a$8g2$1@nnrp1.deja.com> <37B2E9B8.491D@wanadoo.fr> <37B43D99.608A@wanadoo.fr> <7pa195$prj$1@nnrp1.deja.com> X-Original-Date: Tue, 17 Aug 1999 11:44:02 -0400 X-Accept-Language: en Content-Type: text/plain; charset=us-ascii Organization: Duke University, Durham, NC, USA X-Auth: PGPMoose V1.1 PGP comp.std.c++ iQBVAwUAN7mD66wEuYhIxRhxAQFYbAIAjXciESfK+wh/qK14u1NRB6mMT+s41v1K bkcX/USHoANK5n1McCP9kGryWgwOh2tooEQFc7+echTSGSutIjinnA== =AhPA Mime-Version: 1.0 Newsgroups: comp.std.c++ sirwillard@my-deja.com wrote: > > Not so crystal clear. The first thing that must be decided is > if 'typeof' performs static typing or runtime typing. Seems people > don't agree on this one within this thread. This is why I brought the > subject up... not because we can't come to a conclusion and define > proper semantics for it, but because the proper semantics have to be > defined in order to make a proposal. As originally proposed, typeof was the same kind of compiler construct as sizeof. C's extension of sizeof to have a run-time component was not then in train. With that historical context, I think it is clear that typeof should not have any run-time magic associated with it. That kind of magic belongs to casts and typeid. The main reason for this is that types (as opposed to instances) do not exist at run-time. Extending typeof to have a run-time component would blur this semantic distinction. 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 ]