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<?php
/**
* This file is part of Railt package.
*
* For the full copyright and license information, please view the LICENSE
* file that was distributed with this source code.
*/
declare(strict_types=1);
namespace Railt\Compiler\Reader\Resolver;
use Railt\Compiler\Exception\GrammarException;
use Railt\Io\Readable;
use Railt\Lexer\TokenInterface;
* Class RuleResolver
class RuleResolver implements ResolverInterface
{
* @var array|string[]
private $rules = [];
* @var string|null
private $current;
private $keep = [];
private $delegates = [];
public function resolve(Readable $readable, TokenInterface $token): void
if ($this->next($readable, $token)) {
return;
}
* @param Readable $readable
* @param TokenInterface $token
* @return bool
* @throws \Railt\Io\Exception\ExternalFileException
private function next(Readable $readable, TokenInterface $token): bool
if ($token->name() === 'T_NODE_DEFINITION') {
$this->current = $token->value(1);
return true;
if ($this->current === null) {
$error = \sprintf('Unprocessed production %s', $token->value(0));
throw (new GrammarException($error))->throwsIn($readable, $token->offset());
return false;
railt /
compiler
