multimap::swap

Exchanges the elements of two multimaps.

void swap(
   multimap<Key, Type, Traits, Allocator>& _Right
);

Parameters

• _Right
  The multimap providing the elements to be swapped, or the multimap whose elements are to be exchanged with those of the multimap _Left.

Remarks

The member function invalidates no references, pointers, or iterators that designate elements in the two multimaps whose elements are being exchanged.

Example

// multimap_swap.cpp
// compile with: /EHsc
#include <map>
#include <iostream>

int main( )
{
   using namespace std;
   multimap <int, int> m1, m2, m3;
   multimap <int, int>::iterator m1_Iter;
   typedef pair <int, int> Int_Pair;

   m1.insert ( Int_Pair ( 1, 10 ) );
   m1.insert ( Int_Pair ( 2, 20 ) );
   m1.insert ( Int_Pair ( 3, 30 ) );
   m2.insert ( Int_Pair ( 10, 100 ) );
   m2.insert ( Int_Pair ( 20, 200 ) );
   m3.insert ( Int_Pair ( 30, 300 ) );

   cout << "The original multimap m1 is:";
   for ( m1_Iter = m1.begin( ); m1_Iter != m1.end( ); m1_Iter++ )
      cout << " " << m1_Iter -> second;
   cout   << "." << endl;

   // This is the member function version of swap
   m1.swap( m2 );

   cout << "After swapping with m2, multimap m1 is:";
   for ( m1_Iter = m1.begin( ); m1_Iter != m1.end( ); m1_Iter++ )
      cout << " " << m1_Iter -> second;
   cout  << "." << endl;

   // This is the specialized template version of swap
   swap( m1, m3 );

   cout << "After swapping with m3, multimap m1 is:";
   for ( m1_Iter = m1.begin( ); m1_Iter != m1.end( ); m1_Iter++ )
      cout << " " << m1_Iter -> second;
   cout   << "." << endl;
}

The original multimap m1 is: 10 20 30.
After swapping with m2, multimap m1 is: 100 200.
After swapping with m3, multimap m1 is: 300.

Requirements

Header: <map>

Namespace: std

See Also

Reference

multimap Class

Standard Template Library