C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Re: Cast vector<foo*> to vector<const foo*>?          C++Talk.NET Forum Index -> C++ language (comp.lang.c++) View previous topic :: View next topic   Author Message Earl Purple Guest Posted: Fri Jan 27, 2006 11:23 am    Post subject: Re: Cast vector<foo*> to vector<const foo*>? Andrew Koenig wrote: Quote: Care to edify me why? At first blush, they seem quite similar. Here is one reason: void append(vector<const foo*>& v, const foo* p) { v.push_back(p); } const foo f; const foo* p = &f; vector<foo*> v; append(v, p); By casting v to vector<const foo*>&, you have managed to put a const foo* value into a vector<foo*>. Now, you can execute v.last()->munge(); where munge is a member of class foo that modifies its object. By doing so, you have modified a const foo object. Something you couldn't do with my adapter as you cannot modify the vector either thus you can't push anything onto it. 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.