http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50929
--- Comment #3 from Daniel Krügler <daniel.kruegler at googlemail dot com> 2011-10-31 08:24:58 UTC --- (In reply to comment #2) > That's a shame, and rather annoying. I read pages and pages of the standard to > try to understand this one. Do you know where this is explained? Actually this is already required in C++03 (modulo perfect forwarding), see [class.copy], footnote 106: "Because a template constructor is never a copy constructor, the presence of such a template does not suppress the implicit declaration of a copy constructor. Template constructors participate in overload resolution with other constructors, including copy constructors, and a template constructor may be used to copy an object if it provides a better match than other constructors." In C++11 this is just part of the general description of initialization semantics in N3290, [dcl.init] p16.
