list::const_reference

A type that provides a reference to a const element stored in a list for reading and performing const operations.

typedef typename Allocator::const_reference const_reference;

Remarks

A type const_reference cannot be used to modify the value of an element.

Example

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

int main( ) 
{
   using namespace std;
   list <int> c1;
   
   c1.push_back( 10 );
   c1.push_back( 20 );

   const list <int> c2 = c1;
   const int &i = c2.front( );
   const int &j = c2.back( );
   cout << "The first element is " << i << endl;
   cout << "The second element is " << j << endl;
   
   // The following line would cause an error because c2 is const
   // c2.push_back( 30 );
}

The first element is 10
The second element is 20

Requirements

Header: <list>

Namespace: std

See Also

Reference

list Class

Standard Template Library