front_inserter

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

template<class Container> 
   front_insert_iterator<Container> front_inserter( 
      Container& _Cont 
   );

Parameters

• _Cont
  The container object whose front is having an element inserted.

Return Value

A front_insert_iterator associated with the container object _Cont.

Remarks

The member function front_insert_iterator of the front_insert_iterator class may also be used.

Within the Standard Template Library, the argument must refer to one of the two sequence containers that have the member function push_back: deque Class or list Class.

Example

// iterator_front_inserter.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 ( 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 template function to insert an element
   front_insert_iterator< list < int> > Iter(L);
   *Iter = 100;

   // Alternatively, you may use the front_insert member function
   front_inserter ( L ) = 200;

   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:
 ( -1 0 1 2 3 4 5 6 7 8 ).
After the front insertions, the list L is:
 ( 200 100 -1 0 1 2 3 4 5 6 7 8 ).

Requirements

Header: <iterator>

Namespace: std

See Also

Reference

Standard Template Library