front_insert_iterator::front_insert_iterator

Creates an iterator that can insert elements at the front of a specified container object.

explicit front_insert_iterator( 
   Container& _Cont 
);

Parameters

• _Cont
  The container object into which the front_insert_iterator is to insert elements.

Return Value

A front_insert_iterator for the parameter container object.

Example

// front_insert_iterator_front_insert_iterator.cpp
// compile with: /EHsc
#include <iterator>
#include <list>
#include <iostream>

int main( )
{
   using namespace std;
   int i;
   list <int>::iterator L_Iter;

   list<int> L;
   for (i = -1 ; i < 9 ; ++i )  
   {
      L.push_back ( 2 * i );
   }

   cout << "The list L is:\n ( ";
   for ( L_Iter = L.begin( ) ; L_Iter != L.end( ); L_Iter++)
      cout << *L_Iter << " ";
   cout << ")." << endl;

   // Using the member function to insert an element
   front_inserter ( L ) = 20;

   // Alternatively, one may use the template function
   front_insert_iterator< list < int> > Iter(L);
   *Iter = 30;

   cout << "After the front insertions, the list L is:\n ( ";
   for ( L_Iter = L.begin( ) ; L_Iter != L.end( ); L_Iter++)
      cout << *L_Iter << " ";
   cout << ")." << endl;
}

The list L is:
 ( -2 0 2 4 6 8 10 12 14 16 ).
After the front insertions, the list L is:
 ( 30 20 -2 0 2 4 6 8 10 12 14 16 ).

Requirements

Header: <iterator>

Namespace: std

See Also

Reference

front_insert_iterator Class

Standard Template Library