symfony/src/Symfony/Bundle/FrameworkBundle/DependencyInjection/Compiler/ControllerArgumentValueResolverPass.php

<?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\Bundle\FrameworkBundle\DependencyInjection\Compiler;

use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
use Symfony\Component\DependencyInjection\Compiler\PriorityTaggedServiceTrait;
use Symfony\Component\DependencyInjection\ContainerBuilder;

/**
 * Gathers and configures the argument value resolvers.
 *
 * @author Iltar van der Berg <kjarli@gmail.com>
 */
class ControllerArgumentValueResolverPass implements CompilerPassInterface
{
    use PriorityTaggedServiceTrait;

    public function process(ContainerBuilder $container)
    {
        if (!$container->hasDefinition('argument_resolver')) {
            return;
        }

        $definition = $container->getDefinition('argument_resolver');
        $argumentResolvers = $this->findAndSortTaggedServices('controller.argument_value_resolver', $container);
        $definition->replaceArgument(1, $argumentResolvers);
    }
}