c++ - Is my code creating a deep or shallow copy of my object? -

i have code takes stack made of external pointer , internal pointers linked lists, can't tell if it's making deep or shallow copy though. if don't have enough information i'm sorry, think need tell though. thank you!

void stackclass::operator =(const stackclass& orig) {     //stack = nullptr;     node* temp = orig.stack;     if (!orig.isempty())     {         while (temp != null)         {             stack = orig.stack;    // sets thew new stack equal old stack's value             temp = temp->next;         } // end while loop     } // end if     else     {         stack = nullptr;          // sets empty list because there's no values     } // end else } 

in case it's copying pointer i.e shallow copy in effect.

deep copy means rather copying pointer explicitly allocate memory new pointer , store contents of passed in pointer code happens missing...