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[Bug c++/47942] Not possible to initialize a shared_ptr with a class defined in function scope, inheriting from a global scope base class
- From: "redi at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 1 Mar 2011 13:45:36 +0000
- Subject: [Bug c++/47942] Not possible to initialize a shared_ptr with a class defined in function scope, inheriting from a global scope base class
- Auto-submitted: auto-generated
- References: <bug-47942-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47942
--- Comment #3 from Jonathan Wakely <redi at gcc dot gnu.org> 2011-03-01 13:45:26 UTC ---
(In reply to comment #2)
> Your options are either to use C++0x mode (classes without linkage can be used
> as template arguments in C++0x) or to upcast the pointer
It seems that the change to allow local types as template args (see
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2008/n2657.htm for the
proposal) was implemented in GCC 4.5, so you can't rely on that in 4.4
So the best option is:
return BasePtr(static_cast<Base*>(new InlineImpl));