im confused. I kow how a while loop works and what it does but im stumped on this line while(true)... while what is true??? i dont get it. here is the code that is in question copied from the fps tutorial ai sript.

function Start () {
    // Auto setup player as target through tags
    if (target == null && GameObject.FindWithTag("Player"))
       target = GameObject.FindWithTag("Player").transform;

       animation["idle"].wrapMode = WrapMode.Loop;

    Patrol();
}

function Patrol () {
    var curWayPoint = AutoWayPoint.FindClosest(transform.position);
    while (true) {
       var waypointPosition = curWayPoint.transform.position;
       // Are we close to a waypoint? -> pick the next one!
       if (Vector3.Distance(waypointPosition, transform.position) < pickNextWaypointDistance)
         curWayPoint = PickNextWaypoint (curWayPoint);

       // Attack the player and wait until
       // - player is killed
       // - player is out of sight     
       if (CanSeeTarget ())
         yield StartCoroutine("AttackPlayer");

       // Move towards our target
       MoveTowards(waypointPosition);


       yield;
    }
}

so what is going on here can someone please explain.