operator== (<queue>)
Tests if the queue object on the left side of the operator is equal to queue object on the right side.
bool operator==(
const queue <Type, Container>& _Left,
const queue <Type, Container>& _Right,
);
Parameters
_Left
An object of type queue._Right
An object of type queue.
Return Value
true if the queues are not equal; false if queues are equal.
Remarks
The comparison between queue objects is based on a pairwise comparison of their elements. Two queues are equal if they have the same number of elements and their respective elements have the same values. Otherwise, they are unequal.
Example
// queue_op_eq.cpp
// compile with: /EHsc
#include <queue>
#include <list>
#include <iostream>
int main( )
{
using namespace std;
// Declares queues with list base containers
queue <int, list<int> > q1, q2, q3;
// The following line would have caused an error because vector
// does not support pop_front( ) and so cannot be adapted
// by queue as a base container
// queue <int, vector<int> > q1, q2, q3;
q1.push( 1 );
q2.push( 2 );
q3.push( 1 );
if ( q1 != q2 )
cout << "The queues q1 and q2 are not equal." << endl;
else
cout << "The queues q1 and q2 are equal." << endl;
if ( q1 != q3 )
cout << "The queues q1 and q3 are not equal." << endl;
else
cout << "The queues q1 and q3 are equal." << endl;
}
The queues q1 and q2 are not equal. The queues q1 and q3 are equal.
Requirements
Header: <queue>
Namespace: std