C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  typedef & template          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Dmytro Guest Posted: Sun Jun 18, 2006 9:10 am    Post subject: typedef & template Hi! This code is ok: template<class T> struct Container { T x; typedef int size_type; size_type size() { return sizeof T; } }; Why the compiler (VC7) does not compile the following code? template<class T> struct Container { T x; typedef int size_type; size_type size() const; }; template<class T> Container<T>::size_type Container<T>::size() { return sizeof T; } --- Thanks Dmytro Back to top Jakob Bieling Guest Posted: Sun Jun 18, 2006 9:10 am    Post subject: Re: typedef & template Dmytro <dmytro.bukhantsov (AT) gmail (DOT) com> wrote: Quote: Why the compiler (VC7) does not compile the following code? template<class T struct Container { T x; typedef int size_type; size_type size() const; }; template<class T Container<T>::size_type Container<T>::size() { return sizeof T; } Where (which line in the above snippet) and which error do you get? My guess is you're missing a 'typename' in the last line. hth -- jb (reply address in rot13, unscramble first) Back to top Ian Collins Guest Posted: Sun Jun 18, 2006 9:10 am    Post subject: Re: typedef & template Dmytro wrote: Quote: Hi! This code is ok: template<class T struct Container { T x; typedef int size_type; size_type size() { return sizeof T; } }; Why the compiler (VC7) does not compile the following code? template<class T struct Container { T x; typedef int size_type; Why use int for a size_type? Does a negative size make sense? Quote: size_type size() const; }; template<class T Container<T>::size_type Container<T>::size() { return sizeof T; } You left out two important things: typename Container<T>::size_type Container<T>::size() const { return sizeof T; } The typename is required to tell the compiler that Container<T>::size_type is a type and the const because the prototype function is const. -- Ian Collins. 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 (comp.lang.c++) 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.