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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\HttpKernel\Controller\ArgumentResolver;
use Symfony\Component\HttpFoundation\Request;
use Symfony\Component\HttpKernel\Controller\ArgumentValueResolverInterface;
use Symfony\Component\HttpKernel\ControllerMetadata\ArgumentMetadata;
/**
* Yields the default value defined in the action signature when no value has been given.
*
* @author Iltar van der Berg <kjarli@gmail.com>
*/
final class DefaultValueResolver implements ArgumentValueResolverInterface
{
/**
* {@inheritdoc}
*/
public function supports(Request $request, ArgumentMetadata $argument): bool
{
return $argument->hasDefaultValue() || (null !== $argument->getType() && $argument->isNullable() && !$argument->isVariadic());
}
/**
* {@inheritdoc}
*/
public function resolve(Request $request, ArgumentMetadata $argument): iterable
{
yield $argument->hasDefaultValue() ? $argument->getDefaultValue() : null;
}
}