對於exC++在列表中插入一個迭代器指向的對象

Question

假設您有一個指向列表中某個對象的迭代器，並且您希望編寫一個函數來將該迭代器指向的任何對象複製到另一個對象中指定清單。這可能嗎？

例如

std::list<Customer> customer; 
for (customer=customers.begin(); customer!=customers.end(); ++customer){ 
    std::list<Inventory>::iterator tool; 
    for (tool=inventory.begin(); tool!=inventory.end(); ++tool){ 
      tool->addToWaitlist(customer); 
     } 
} 

其中

void addToWaitlist(std::list<Customer>::iterator customer){ 
      std::list<Customer>::iterator person; 
      if (!wait_list.empty()){ 
        for (person=wait_list.begin(); person!=wait_list.end(); ++person){ 
          // Add customer with respect to time stamp 
          //if (customer.getTime() <= person->getTime()){ 
          //  wait_list.insert(person, customer); 
          } 
        } 
      } else { 
        // Add first person to wait list 
        wait_list.push_back(customer); 
      } 
    } 

Answer 1

這是很簡單的：

// given some T and the following lists 
list<T> l1, l2; 
list<T>::iterator objit=l1.begin(); // picked the first item in l1 since it's easy 

// copy the item to l2 
l2.push_back(*objit);