public function testComparing()
{
$this->assertEquals(-1, Helper::cmp(-1, 0));
$this->assertEquals(0, Helper::cmp(0, 0));
$this->assertEquals(1, Helper::cmp(0, -1));
}
public static function compare(Token $a, Token $b)
{
$multiplier = $a->isEnd() ? -1 : 1;
if ($a->isStart() && $b->isEnd() || $a->isEnd() && $b->isStart()) {
if ($a->getStart() == $b) {
return 1;
}
if ($a->getEnd() == $b) {
return -1;
} else {
return $multiplier;
}
} elseif (($rule = Helper::cmp($b->rule->priority, $a->rule->priority)) !== 0) {
return $multiplier * $rule;
} else {
return $multiplier * ($a->id < $b->id ? -1 : 1);
}
}