C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  What's the rationale of not allowing this usage[template ali          C++Talk.NET Forum Index -> C++ language, library and standards View previous topic :: View next topic   Author Message Guest Posted: Sun May 20, 2007 10:19 pm    Post subject: What's the rationale of not allowing this usage[template ali template<typename T> using Vec = std::vector<T, allocator<T>>; template<template<typename> class TT> struct S; S<Vec>; It will solve the long-standed problem of not being able to default some parameter of a template and treat it like one with fewer parameters. --- [ 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 Alberto Ganesh Barbati Guest Posted: Mon May 21, 2007 3:05 am    Post subject: Re: What's the rationale of not allowing this usage[template pongba (AT) gmail (DOT) com ha scritto: Quote: template<typename T using Vec = std::vector<T, allocator<T>>; template<template<typename> class TT struct S; S<Vec>; It will solve the long-standed problem of not being able to default some parameter of a template and treat it like one with fewer parameters. AFAIK, it *is* allowed. I may be wrong, but that's how I interpret 14.3.3/1 in the latest draft (with emphasis added): "A template-argument for a template template-parameter shall be the name of a class template *or a template alias*, expressed as id-expression." What makes you think it isn't allowed? Ganesh --- [ 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.