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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug c++/53856] New: Default argument allowed on member defined outside of class template Date: Wed, 04 Jul 2012 16:39:00 -0000 [thread overview] Message-ID: <bug-53856-4@http.gcc.gnu.org/bugzilla/> (raw) http://gcc.gnu.org/bugzilla/show_bug.cgi?id=53856 Bug #: 53856 Summary: Default argument allowed on member defined outside of class template Classification: Unclassified Product: gcc Version: 4.8.0 Status: UNCONFIRMED Keywords: accepts-invalid Severity: normal Priority: P3 Component: c++ AssignedTo: unassigned@gcc.gnu.org ReportedBy: redi@gcc.gnu.org template<typename T> struct A { struct B; }; template<typename T = int> struct A<T>::B { int i; }; int main() { A<int>::B b = { }; return b.i; } This should be rejected according to [temp.param]/9 "A default template-argument shall not be specified in the template-parameter-lists of the definition of a member of a class template that appears outside of the member’s class." All versions of G++ since at least 3.4 accept the code above. Comeau online rejects it: "ComeauTest.c", line 7: error: a default template argument cannot be specified on the declaration of a member of a class template outside of its class template<typename T = int> ^ As does Clang++ bug2.cc:7:19: error: cannot add a default template argument to the definition of a member of a class template template<typename T = int> ^ ~~~ Solaris CC accepts it.
next reply other threads:[~2012-07-04 16:39 UTC|newest] Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top 2012-07-04 16:39 redi at gcc dot gnu.org [this message] 2012-07-04 16:44 ` [Bug c++/53856] " redi at gcc dot gnu.org 2015-09-22 17:33 ` paolo.carlini at oracle dot com 2015-10-05 21:44 ` paolo at gcc dot gnu.org 2015-10-05 21:44 ` paolo.carlini at oracle dot com
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