C++Talk.NET C++ language newsgroups   Archives   FAQ   Search   Memberlist   Usergroups   Register   Profile   Log in to check your private messages   Log in  conformance question          C++Talk.NET Forum Index -> C++ language, library and standards View previous topic :: View next topic   Author Message Jimen Ching Guest Posted: Sun Feb 15, 2004 5:29 pm    Post subject: conformance question Hi, I was wondering if the following code is allowed by the standard. --------------------------- class cl { public: cl() : s(this) {} operator int() { return 0; } private: int data; void func(void) {} struct st { cl *cl_ptr; st(cl *p) { cl_ptr = p; } void func(void) { cl_ptr->func(); } void func2(void) { cl_ptr->data++; } }; st s; }; int main() { cl c; return c; } --------------------------- I compiled this with GCC 2.95.4, and I got an error about func() and data being private. But GCC 3.3.3pre doesn't give any errors. I've also compiled this with VC++ 6 and it gives an error. But VC++ 7 doesn't. Since the later versions are supposed to be more standards conforming, this suggests that this access is allowed. But reading the standard seems to say otherwise. So is the newer versions of the compilers wrong, or am I misinterpreting the standard? Thanks in advance. --jc -- Jimen Ching (WH6BRR) [email]jching (AT) flex (DOT) com[/email] [email]wh6brr (AT) uhm (DOT) ampr.org[/email] --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.jamesd.demon.co.uk/csc/faq.html ] Back to top Alberto Barbati Guest Posted: Sun Feb 15, 2004 9:32 pm    Post subject: Re: conformance question Jimen Ching wrote: Quote: I compiled this with GCC 2.95.4, and I got an error about func() and data being private. But GCC 3.3.3pre doesn't give any errors. I've also compiled this with VC++ 6 and it gives an error. But VC++ 7 doesn't. Since the later versions are supposed to be more standards conforming, this suggests that this access is allowed. But reading the standard seems to say otherwise. So is the newer versions of the compilers wrong, or am I misinterpreting the standard? You are interepreting the standard correctly. However, there is a defect report about this issue: http://std.dkuug.dk/jtc1/sc22/wg21/docs/cwg_defects.html#45 It seems that all those compilers have already implemented the proposed resolution, against the current wording of the standard. I guess that's good and it's a pity that this DR hasn't made it into TC1. Alberto --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.jamesd.demon.co.uk/csc/faq.html ] Back to top Francis Glassborow Guest Posted: Sun Feb 15, 2004 10:17 pm    Post subject: Re: conformance question In article <102tfsc7430a0fc (AT) corp (DOT) supernews.com>, Jimen Ching <jching (AT) flex (DOT) com> writes Quote: Hi, I was wondering if the following code is allowed by the standard. As currently formulated nested classes have no access privileges. Worse according to a strict reading of the Standard there is no way to grant that access (can only be granted sideways or outwards by friend declarations). That will be fixed (by removing the lack of access) but for now you must make the nested class a friend of the enclosing class (and compilers violate the Standard by accepting that declaration, well they better or else a great deal of code is both broken and irreparable.) Quote: --------------------------- class cl { public: cl() : s(this) {} operator int() { return 0; } private: int data; void func(void) {} struct st { cl *cl_ptr; st(cl *p) { cl_ptr = p; } void func(void) { cl_ptr->func(); } void func2(void) { cl_ptr->data++; } }; st s; }; int main() { cl c; return c; } --------------------------- I compiled this with GCC 2.95.4, and I got an error about func() and data being private. But GCC 3.3.3pre doesn't give any errors. I've also compiled this with VC++ 6 and it gives an error. But VC++ 7 doesn't. Since the later versions are supposed to be more standards conforming, this suggests that this access is allowed. But reading the standard seems to say otherwise. So is the newer versions of the compilers wrong, or am I misinterpreting the standard? Thanks in advance. --jc -- Francis Glassborow ACCU Author of 'You Can Do It!' see http://www.spellen.org/youcandoit For project ideas and contributions: http://www.spellen.org/youcandoit/projects --- [ comp.std.c++ is moderated. To submit articles, try just posting with ] [ your news-reader. If that fails, use mailto:std-c++@ncar.ucar.edu ] [ --- Please see the FAQ before posting. --- ] [ FAQ: http://www.jamesd.demon.co.uk/csc/faq.html ] 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, library and standards 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.