1 template<typename _Tp> 2 class new_allocator 3 { 4 public: 5 template<typename _Tp1> new_allocator(const new_allocator<_Tp1> &)6 new_allocator(const new_allocator<_Tp1>&) noexcept { } 7 }; 8 9 extern template class new_allocator<char>; 10