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A helper template function that lets you use inserter(_Cont,_Where) instead of insert_iterator<Container>(_Cont,_Where).
template<class Container>
    insert_iterator<Container> inserter(
        Container& _Cont,
        typename Container::iterator _Where
    );
Parameters
- _Cont 
 The container to which new elements are to be added.
- _Where 
 An iterator locating the point of insertion.
Remarks
The template function returns insert_iterator::insert_iterator<Container>(_Cont, _Where).
Example
// iterator_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 = 2 ; i < 5 ; ++i )  
   {
      L.push_back ( 10 * 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 version to insert an element
   insert_iterator<list <int> > Iter( L, L.begin ( ) );
   *Iter = 1;
   // Alternatively, using the member function to insert an element
   inserter ( L, L.end ( ) ) = 500;
   cout << "After the 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: ( 20 30 40 ). After the insertions, the list L is: ( 1 20 30 40 500 ).
Requirements
Header: <iterator>
Namespace: std