public member function

std::list::pop_front

<list>
void pop_front ( );
Delete first element
Removes the first element in the list container, effectively reducing the list size by one.

This calls the removed element's destructor.

Parameters

none

Return value

none

Example

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// list::pop_front
#include <iostream>
#include <list>
using namespace std;

int main ()
{
  list<int> mylist;
  mylist.push_back (100);
  mylist.push_back (200);
  mylist.push_back (300);

  cout << "Popping out the elements in mylist:";
  while (!mylist.empty())
  {
    cout << " " << mylist.front();
    mylist.pop_front();
  }

  cout << "\nFinal size of mylist is " << int(mylist.size()) << endl;

  return 0;
}

Output:
Popping out the elements in mylist: 100 200 300
Final size of mylist is 0

Complexity

Constant.

See also

list::pop_back
Delete last element (public member function)
list::push_front
Insert element at beginning (public member function)
list::erase
Erase elements (public member function)

C++