This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 110b. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
[Voted into the WP at the March, 2011 meeting.]N3092 comment FI 2
It should be allowed to explicitly default an explicit special member function on its first declaration. It is very likely that users will want to default explicit copy constructors without having to write such defaulting outside of the class.
Proposed resolution (November, 2010):
This issue is resolved by the resolution of issue 1135.