1  
       2  int ary[4];
       3  extern int unb[];
       4  typedef int z[0];
       5  
       6  
       7  template<typename _Tp>
       8  struct __aligned_membuf
       9  {
      10    unsigned char _M_storage[sizeof(_Tp)];
      11    _Tp bob[5];
      12  
      13    typedef _Tp ary[5];
      14    typedef const ary c_ary;
      15  };