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From: "sstrasser at systemhaus-gruppe dot de" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/13495] New: Impossible "friend"-ship to nested template Date: Sat, 27 Dec 2003 07:46:00 -0000 [thread overview] Message-ID: <20031227022232.13495.sstrasser@systemhaus-gruppe.de> (raw) [-- Warning: decoded text below may be mangled, UTF-8 assumed --] [-- Attachment #1: Type: text/plain, Size: 1540 bytes --] Hi. I don´t exactly know what the correct syntax to do this is, since I couldn´t look up in the specification, but it looks like a bug because a) I couldn´t figure out a way to do this with GCC b) I could figure out a way which does work with MSVC but doesn´t with GCC so here it is: a template class which contains a nested class which itself is no template but inherits the template parameter: template<typename T> class A{ public: class B{}; }; class A<T>::B should be friend of another class: template<typename T> class OtherClass{ XXX }; A<T>::B is a dependent type, so using it requires the 'typename'-keyword. ("implicit typename deprecated") a) XXX == friend typename A<T>::B; doesn´t work because it requires the 'class'-keyword because it´s a class friendship b) XXX == friend class A<T>::B; doesn´t work because A<T>::B is a dependent typename, which requires the 'typename' keyword. c) XXX == friend typename class A<T>::B; or d) XXX == friend class typename A<T>::B pass out with parse error. MSVC compiles a) (wrongly) and c) (possibly correct) Thank you, Stefan -- Summary: Impossible "friend"-ship to nested template Product: gcc Version: 3.3 Status: UNCONFIRMED Severity: minor Priority: P2 Component: c++ AssignedTo: unassigned at gcc dot gnu dot org ReportedBy: sstrasser at systemhaus-gruppe dot de CC: gcc-bugs at gcc dot gnu dot org http://gcc.gnu.org/bugzilla/show_bug.cgi?id=13495
next reply other threads:[~2003-12-27 2:22 UTC|newest] Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top 2003-12-27 7:46 sstrasser at systemhaus-gruppe dot de [this message] 2003-12-27 16:45 ` [Bug c++/13495] Friendship to class nested withint a template is broken giovannibajo at libero dot it 2004-02-23 15:40 ` lerdsuwa at gcc dot gnu dot org 2004-08-30 15:33 ` giovannibajo at libero dot it 2004-08-31 10:56 ` lerdsuwa at gcc dot gnu dot org 2004-09-04 15:59 ` lerdsuwa at gcc dot gnu dot org 2004-09-06 15:56 ` lerdsuwa at gcc dot gnu dot org 2004-10-20 16:21 ` [Bug c++/13495] Friendship to class nested within " cvs-commit at gcc dot gnu dot org 2004-10-20 16:25 ` lerdsuwa at gcc dot gnu dot org
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