This is an unofficial snapshot of the ISO/IEC JTC1 SC22 WG21 Core Issues List revision 112e. See http://www.open-std.org/jtc1/sc22/wg21/ for the official list.
The standard prohibits a class template from having the same name as one of its template parameters (13.8.2 [temp.local] paragraph 4) . This prohibits
template <class X> class X;for the reason that the template name would hide the parameter, and such hiding is in general prohibited.
Presumably, we should also prohibit
template <template <class T> class T> struct A;for the same reason.