C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  destruct incomple class.          C++Talk.NET Forum Index -> C++ Language (Moderated) View previous topic :: View next topic   Author Message ul Guest Posted: Tue Dec 27, 2005 2:06 am    Post subject: destruct incomple class. Hello everybody. I have read that "The C++ Standard allows, in 5.3.5/5, pointers to incomplete class types to be deleted with a delete-expression. When the class has a non-trivial destructor, or a class-specific operator delete, the behavior is undefined." Could someone bring the example in the topic, or give short explanation, why? Thanks [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Bo Persson Guest Posted: Tue Dec 27, 2005 6:45 pm    Post subject: Re: destruct incomple class. "ul" <yuliy (AT) gmx (DOT) de> skrev i meddelandet news:1135628969.410869.112210 (AT) g43g2000cwa (DOT) googlegroups.com... Quote: Hello everybody. I have read that "The C++ Standard allows, in 5.3.5/5, pointers to incomplete class types to be deleted with a delete-expression. When the class has a non-trivial destructor, or a class-specific operator delete, the behavior is undefined." Could someone bring the example in the topic, or give short explanation, why? Here is an example, suppose you have: struct incomplete; incomplete* get_one(); void func() { incomplete* p = get_one(); delete p; } This is allowed, I guess for C compatibility, as long as incomplete doesn't have a destructor. The compiler cannot know that it should call the destructor, or possibly an operator delete(), defined in another source file. Bo Persson [ 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.