System Verilog Queue Example

module queues;
byte qu [$] ;

initial
  begin
    qu.push_front(1);
    qu.push_front(2);
    qu.push_front(3);
    qu.push_back(4);
    qu.push_back(5);

    foreach(qu[i])begin
      $display(i,qu[i]);
    end

    qu.delete(3);                                          //Delete element at index 3

    $display(" %d ",qu.pop_front() );       // pop_front operation removes first element
    $display(" %d ",qu.size() );

    foreach(qu[i])begin
      $display(i,qu[i]);
    end

    $display(" %d ",qu.pop_back() );    // pop_back operation removes last element

    foreach(qu[i])begin
      $display(i,qu[i]);
    end

  $display(" %d ",qu.size() );
  end
endmodule

OUTPUT:

0 3
1 2
2 1
3 4
4 5

3
3  //pop front

0 2
1 1
2 5

5 //pop back

0 2
1 1

2