--- /dev/null
+<?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\DependencyInjection\Argument;
+
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Represents a service wrapped in a memoizing closure.
+ *
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class ServiceClosureArgument implements ArgumentInterface
+{
+ private $values;
+
+ public function __construct(Reference $reference)
+ {
+ $this->values = array($reference);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getValues()
+ {
+ return $this->values;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function setValues(array $values)
+ {
+ if (array(0) !== array_keys($values) || !($values[0] instanceof Reference || null === $values[0])) {
+ throw new InvalidArgumentException('A ServiceClosureArgument must hold one and only one Reference.');
+ }
+
+ $this->values = $values;
+ }
+}