While going through the auto_ptr implementation, i come across one query. The auto_ptr_ref struct is specifically designed for copying the non const auto_ptr s. I am not able to understand the exact need of this auto_ptr_ref in copy construcotr and assignment operator of auto_ptr class. It would be of great help if some one clarifies it .... thanks in advance -sanjay
http://www.cplusplus.com/reference/std/memory/auto_ptr_ref/ Also try Googling; you are not likely to be the first person in computing history to ask this question http://lmgtfy.com/?q=auto_ptr_ref