/**
* @param Item $item
* @return bool
*/
public function hasItem(Item $item)
{
/** @var \ArrayIterator|Item[] $items */
$items = new \ArrayIterator($this->items->getArrayCopy());
foreach ($items as $currentItem) {
$matches = true;
$matches = $matches && $item->getRule() === $currentItem->getRule();
$matches = $matches && $item->getEntryPosition() === $currentItem->getEntryPosition();
$matches = $matches && $item->getInputPosition() === $currentItem->getInputPosition();
if ($matches) {
return true;
}
}
return false;
}
/**
* @param State $state
* @param Token[] $input
* @param Item $item
* @param TokenReference $tokenReference
*/
private function scan(State $state, $input, Item $item, TokenReference $tokenReference)
{
$inputPosition = $state->getSets()->key();
if (!array_key_exists($inputPosition, $input)) {
return;
}
$token = $input[$inputPosition];
if ($tokenReference->matchesToken($token)) {
$nextInputPosition = $inputPosition + 1;
if (!array_key_exists($nextInputPosition, $state->getSets())) {
$state->addSet(new Set());
}
$nextSet = $state->getSets()[$nextInputPosition];
$nextSet->addItem(new Item($item->getRule(), $item->getEntryPosition() + 1, $item->getInputPosition()));
}
}
