_M_erase_bucket
void _M_erase_bucket(const size_type __n, _Node* __first, _Node* __last);
void _M_erase_bucket(const size_type __n, _Node* __last);
_M_erase_bucket(__f_bucket, __first._M_cur, __last._M_cur);
_M_erase_bucket(__f_bucket, __first._M_cur, 0);
_M_erase_bucket(__n, 0);
_M_erase_bucket(__l_bucket, __last._M_cur);
_M_erase_bucket(__n, __last);