From -2808869833006422772 X-Google-Thread: f78e5,f1baa317914feeaf X-Google-Attributes: gidf78e5,domainid0,public,usenet X-Google-Language: ENGLISH,ASCII-7-bit Path: g2news2.google.com!news1.google.com!newsfeed.stanford.edu!news.kjsl.com!news.alt.net!frodo.cs.rpi.edu!not-for-mail From: "Joe Smith" Newsgroups: comp.std.c++ Subject: Re: typeof keyword Date: Wed, 25 Mar 2009 18:28:44 CST Organization: Mixmin Lines: 32 Sender: cppmods@cs.rpi.edu Approved: stephen.clamage@sun.com Message-ID: References: <488de3d4-77ac-4c01-8130-d196dec70bc8@v15g2000yqn.googlegroups.com> NNTP-Posting-Host: netlab.cs.rpi.edu Content-Type: text/plain; format=flowed; charset="iso-8859-1"; reply-type=original To: (Usenet) Return-Path: X-Original-Date: Wed, 25 Mar 2009 12:00:17 -0400 X-Submission-Address: std-c++@netlab.cs.rpi.edu Xref: g2news2.google.com comp.std.c++:341 wrote: > hi, > i was wondering if a typeof keyword is going to be defined in the new > standard? > i, personnally, would find it very helpful. > If what you are wanting is something like the following, you are in luck: int main() { int i; typeof(i) j; } (i.e. the typeof() operator acts as the type of the expression so it can be used to define new variables of that type) What you are looking for is decltype(), which works exactly like you would expect ("decltype(i) j;"). It is new in C++0x, but already available in the latest versions of some compilers. (for example it is present in the latest Comeau C++ beta, as well as the latest gcc). -- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@netlab.cs.rpi.edu] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.comeaucomputing.com/csc/faq.html ]