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<?php
/*
* This file is part of the Symfony package.
*
* (c) Fabien Potencier <fabien@symfony.com>
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
namespace Symfony\Component\Yaml;
use Symfony\Component\Yaml\Exception\ParseException;
use Symfony\Component\Yaml\Tag\TaggedValue;
/**
* @internal
*/
final class ParserState
{
public int $maxNestingLevel = Parser::DEFAULT_MAX_NESTING_LEVEL;
public int $currentNestingLevel = 0;
public int $maxAliasesForCollections = Parser::DEFAULT_MAX_ALIASES_FOR_COLLECTIONS;
public int $collectionAliasCount = 0;
public bool $aliasesEnabled = true;
public function reset(): void
{
$this->currentNestingLevel = 0;
$this->collectionAliasCount = 0;
$this->aliasesEnabled = true;
}
public function enterNestingLevel(int $line, ?string $snippet, ?string $filename): void
{
if (++$this->currentNestingLevel > $this->maxNestingLevel) {
--$this->currentNestingLevel;
throw new ParseException(\sprintf('Maximum nesting depth of %d exceeded.', $this->maxNestingLevel), $line, $snippet, $filename);
}
}
public function leaveNestingLevel(): void
{
if ($this->currentNestingLevel > 0) {
--$this->currentNestingLevel;
}
}
public function countAlias(mixed $refValue, int $line, ?string $snippet, ?string $filename): void
{
if (!$this->aliasesEnabled) {
throw new ParseException('Aliases are disabled.', $line, $snippet, $filename);
}
if ($refValue instanceof TaggedValue) {
$refValue = $refValue->getValue();
}
if (!\is_array($refValue) && !$refValue instanceof \stdClass) {
return;
}
if (++$this->collectionAliasCount > $this->maxAliasesForCollections) {
throw new ParseException(\sprintf('Maximum number of collection aliases (%d) exceeded. This limit can be increased via the Parser constructor.', $this->maxAliasesForCollections), $line, $snippet, $filename);
}
}
}