C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  POD initialization, standard or extension?          C++Talk.NET Forum Index -> C++ Language (Moderated) View previous topic :: View next topic   Author Message Matthew D Moss Guest Posted: Fri Aug 18, 2006 4:54 am    Post subject: POD initialization, standard or extension? Looking among some sample code, I found the following (names changed to protect the innocent): struct InitOptions { GLuint flags; GLuint maxItems; GLboolean initializeItems; GLuint memorySize; }; InitOptions opts = { flags: FLAG_A | FLAG_B, maxItems: 1, initializeItems: false, memorySize: 128 * 1024 * 1024, }; I've never seen structure initialization like that... Is this standard, or a compiler extension? [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Jiang Guest Posted: Fri Aug 18, 2006 6:35 am    Post subject: Re: POD initialization, standard or extension? Matthew D Moss wrote: Quote: Looking among some sample code, I found the following (names changed to protect the innocent): struct InitOptions { GLuint flags; GLuint maxItems; GLboolean initializeItems; GLuint memorySize; }; InitOptions opts = { flags: FLAG_A | FLAG_B, maxItems: 1, initializeItems: false, memorySize: 128 * 1024 * 1024, }; I've never seen structure initialization like that... Is this standard, or a compiler extension? Designated Initializer is gcc extension. http://gcc.gnu.org/onlinedocs/gcc-4.1.1/gcc/Designated-Inits.html#Designated -Inits [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Ulrich Eckhardt Guest Posted: Fri Aug 18, 2006 6:01 pm    Post subject: Re: POD initialization, standard or extension? Matthew D Moss wrote: Quote: struct InitOptions { GLuint flags; GLuint maxItems; GLboolean initializeItems; GLuint memorySize; }; InitOptions opts = { flags: FLAG_A | FLAG_B, maxItems: 1, initializeItems: false, memorySize: 128 * 1024 * 1024, }; I've never seen structure initialization like that... Is this standard, or a compiler extension? This in particular is a GCC extension. "like that" is standard, although not C++ standard - it is part of C99 and is done slightly different (and GCC supports that now, too): InitOptions opts = { .flags = FLAG_A|FLAG_B, .maxItems = 1, .initializeItems = false, .memorySize = 128 * 1024 * 1024, }; On a side notice, C99 also added support for similar things with arrays: int arr[20] = { [5]=1, [8]=6, [13]=7 }; Uli [ 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.