C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  Why no <stdfwd> header?          C++Talk.NET Forum Index -> C++ Language (Moderated) View previous topic :: View next topic   Author Message Javier Estrada Guest Posted: Sat Feb 28, 2004 3:57 am    Post subject: Why no <stdfwd> header? It seems natural that if there is a <iosfwd> to forward declare the I/O related classes, there should be a header for the classes contained in the std namespace. Any takers? Regards, Javier Estrada [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Antoun Kanawati Guest Posted: Sun Feb 29, 2004 3:04 am    Post subject: Re: Why no <stdfwd> header? Javier Estrada wrote: Quote: It seems natural that if there is a <iosfwd> to forward declare the I/O related classes, there should be a header for the classes contained in the std namespace. Any takers? <iosfwd> forward-declares iostream related items. A <stdfwd> would have to forward-declare EVERYTHING. That's not practical, nor reasonable; assuming it could be done. And, to me, this concept does not seem natural. [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Nicola Musatti Guest Posted: Mon Mar 01, 2004 7:28 pm    Post subject: Re: Why no <stdfwd> header? Antoun Kanawati <antounk (AT) comcast (DOT) net> wrote [...] Quote: iosfwd> forward-declares iostream related items. A <stdfwd> would have to forward-declare EVERYTHING. That's not practical, nor reasonable; assuming it could be done. And, to me, this concept does not seem natural. Yet there are many situations in which inclusion of the standard headers brings in definitions where declarations would be sufficient. Did you ever check out how much code is brought in in this way? On Windows this ranges in the tens of thousands of lines. A <stdfwd> header would help reduce dependencies and compile time. Cheers, Nicola Musatti [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Richard Smith Guest Posted: Mon Mar 01, 2004 7:30 pm    Post subject: Re: Why no <stdfwd> header? Antoun Kanawati wrote: Quote: iosfwd> forward-declares iostream related items. A <stdfwd> would have to forward-declare EVERYTHING. That's not practical, nor reasonable; assuming it could be done. But a header that forward declared just the containers might be useful (and associated things like std::allocator, std::less and std::pair). Admitedly <stdfwd> wouldn't be an appropriate name for it, but the idea might be worth exploring. After all, it wouldn't be difficult to implement and it wouldn't add significant complexity to language. Also, it's something a user can't do themselves. Even aside from the fact that it's illegal to forward declare Standard Library template's yourself, the problem of redeclaring default template arguments stops you from doing it yourself. -- Richard Smith [ See http://www.gotw.ca/resources/clcm.htm for info about ] [ comp.lang.c++.moderated. First time posters: Do this! ] Back to top Hendrik Schober Guest Posted: Sat Mar 06, 2004 12:02 am    Post subject: Re: Why no <stdfwd> header? Antoun Kanawati <antounk (AT) comcast (DOT) net> wrote: Quote: [...] A <stdfwd> would have to forward-declare EVERYTHING. That's not practical, nor reasonable [...] Yes. But I really wish there would be a <stringfwd> header. Is someone coming up with a proposal all it would need or is there any other reason something like this does not exist already? It seem sto me that this should be a rather simple addition. Schobi -- [email]SpamTrap (AT) gmx (DOT) de[/email] is never read I'm Schobi at suespammers dot org "Sometimes compilers are so much more reasonable than people." Scott Meyers [ 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.