public function compare(Operator $op)
{
if ($this->priority < $op->getPriority()) {
return -1;
} else {
if ($this->priority > $op->getPriority()) {
return 1;
} else {
return 0;
}
}
}
/**
* Return true if this operator has lower priority of operator $o.
*
* @param \oat\beeme\Operator $o
* @return boolean
*/
public function hasLowerPriority(Operator $o)
{
$hasLowerPriority1 = Operator::O_LEFT_ASSOCIATIVE == $this->getAssociativity() && $this->getPriority() <= $o->getPriority();
$hasLowerPriority2 = Operator::O_RIGHT_ASSOCIATIVE == $this->getAssociativity() && $this->getPriority() < $o->getPriority();
return $hasLowerPriority1 || $hasLowerPriority2;
}
/**
* Return true if this operator has lower priority of operator $o.
*
* @param \Math\Operator $o
* @return boolean
*/
public function hasLowerPriority(Operator $o)
{
$hasLowerPriority = Operator::O_LEFT_ASSOCIATIVE == $o->getAssociativity() && $this->getPriority() == $o->getPriority() || $this->getPriority() < $o->getPriority();
return $hasLowerPriority;
}
/**
* @param Operator $operator
* @return int
*/
public function comparePriority(Operator $operator)
{
return $this->priority - $operator->getPriority();
}
