C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Zero-size tr1::arrays          C++Talk.NET Forum Index -> C++ language, library and standards View previous topic :: View next topic   Author Message Scott Meyers Guest Posted: Thu Dec 21, 2006 10:10 am    Post subject: Zero-size tr1::arrays Boost's fixed-size array rejects zero-sized arrays during compilation, and the proposal for tr1::array (N1479 - http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2003/n1479.html) stated that zero-sized arrays were not allowed. TR1 explicitly allows zero-sized arrays, however. Can somebody please explain to me why this support was added? Thanks, Scott --- [ 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 ] Back to top Chris Jefferson Guest Posted: Thu Dec 21, 2006 8:46 pm    Post subject: Re: Zero-size tr1::arrays Scott Meyers wrote: Quote: Boost's fixed-size array rejects zero-sized arrays during compilation, and the proposal for tr1::array (N1479 - http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2003/n1479.html) stated that zero-sized arrays were not allowed. TR1 explicitly allows zero-sized arrays, however. Can somebody please explain to me why this support was added? I can't comment on why this support was added, but I can say that I use it and find it useful, for example I use tr1::arrays to represent lists of arguments to a function, and having no arguments is a perfectly valid situation to be in. Chris --- [ 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 ] Back to top Gennaro Prota Guest Posted: Thu Dec 21, 2006 9:44 pm    Post subject: Re: Zero-size tr1::arrays On Thu, 21 Dec 2006 07:31:44 GMT, Scott Meyers wrote: Quote: Boost's fixed-size array rejects zero-sized arrays during compilation Unless they have changed it back lately it should have support for zero-sized arrays (when BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION is not defined). -- Gennaro Prota. C++ developer. For hire. (to mail me, remove any 'u' from the address) --- [ 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 ] Back to top Pete Becker Guest Posted: Thu Dec 21, 2006 9:46 pm    Post subject: Re: Zero-size tr1::arrays Scott Meyers wrote: Quote: Boost's fixed-size array rejects zero-sized arrays during compilation, and the proposal for tr1::array (N1479 - http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2003/n1479.html) stated that zero-sized arrays were not allowed. TR1 explicitly allows zero-sized arrays, however. Can somebody please explain to me why this support was added? Unlike ordinary arrays, tr1's arrays with no elements can be used meaningfully. They have member functions to give you their size, and you can get iterators to empty ranges. So there's no need for a special case rule. -- -- Pete Roundhouse Consulting, Ltd. (www.versatilecoding.com) Author of "The Standard C++ Library Extensions: a Tutorial and Reference." (www.petebecker.com/tr1book) --- [ 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 ] Back to top Display posts from previous: All Posts1 Day7 Days2 Weeks1 Month3 Months6 Months1 Year Oldest FirstNewest First         C++Talk.NET Forum Index -> C++ language, library and standards All times are GMT Page 1 of 1   Jump to: Select a forum C/C++----------------C LanguageC Language (Moderated)C++ Language (Moderated)C++ language (comp.lang.c++)C++ language, library and standards Non-English C/C++ Newsgroups----------------C++ (German)C++ (French)  You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum Powered by phpBB © 2001, 2006 phpBB Group SEO toolkit © 2004-2006 webmedic.