--- /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\Loader\Configurator\Traits;
+
+use Symfony\Component\DependencyInjection\Exception\InvalidArgumentException;
+
+trait TagTrait
+{
+ /**
+ * Adds a tag for this definition.
+ *
+ * @param string $name The tag name
+ * @param array $attributes An array of attributes
+ *
+ * @return $this
+ */
+ final public function tag($name, array $attributes = array())
+ {
+ if (!is_string($name) || '' === $name) {
+ throw new InvalidArgumentException(sprintf('The tag name for service "%s" must be a non-empty string.', $this->id));
+ }
+
+ foreach ($attributes as $attribute => $value) {
+ if (!is_scalar($value) && null !== $value) {
+ throw new InvalidArgumentException(sprintf('A tag attribute must be of a scalar-type for service "%s", tag "%s", attribute "%s".', $this->id, $name, $attribute));
+ }
+ }
+
+ $this->definition->addTag($name, $attributes);
+
+ return $this;
+ }
+}