C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Singleton Pattern without Static Method          C++Talk.NET Forum Index -> C++ Language (Moderated) View previous topic :: View next topic   Author Message Guest Posted: Sun Jun 04, 2006 5:25 am    Post subject: Singleton Pattern without Static Method Hi Guys I have been trying to understand if there's a way to implement Singleton Pattern without Using Static Methods? Thanks for the help in advance. [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Valentin Samko Guest Posted: Sun Jun 04, 2006 6:18 pm    Post subject: Re: Singleton Pattern without Static Method Venkata.Nanduri (AT) gmail (DOT) com wrote: Quote: I have been trying to understand if there's a way to implement Singleton Pattern without Using Static Methods? = myfile.h = class Singleton { ... }; Singleton* getInstance(); = myfile.cpp = Singleton s; Singleton* getInstance() { return &s; } Of course one can not safely use this before "main", but one can use a nifty counter or other techniques to address this issue. -- Valentin Samko - http://www.valentinsamko.com [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top James Kanze Guest Posted: Tue Jun 06, 2006 4:21 am    Post subject: Re: Singleton Pattern without Static Method Valentin Samko wrote: Quote: Venkata.Nanduri (AT) gmail (DOT) com wrote: I have been trying to understand if there's a way to implement Singleton Pattern without Using Static Methods? = myfile.h = class Singleton { ... }; Singleton* getInstance(); = myfile.cpp = Singleton s; Singleton* getInstance() { return &s; } Of course one can not safely use this before "main", but one can use a nifty counter or other techniques to address this issue. It will also cause problems as soon as you use the idiom for more than one class -- you need some sort of naming convention. Also, of course, it's not a singleton. There's nothing to prevent a user from declaring a local instance. In answer to his question, you can always use a friend function instead of a static member. But why bother? Or more to the point, what's the real difference? -- James Kanze kanze.james (AT) neuf (DOT) fr Conseils en informatique orientée objet/ Beratung in objektorientierter Datenverarbeitung 9 place Sémard, 78210 St.-Cyr-l'École, France +33 (0)1 30 23 00 34 [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] 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 (Moderated) 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.