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vendor/symfony/framework-bundle/DependencyInjection/Compiler/TemplatingPass.php

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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\Bundle\FrameworkBundle\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Compiler\CompilerPassInterface;
+
+class TemplatingPass implements CompilerPassInterface
+{
+    public function process(ContainerBuilder $container)
+    {
+        if ($container->hasDefinition('templating')) {
+            return;
+        }
+
+        if ($container->hasDefinition('templating.engine.php')) {
+            $helpers = array();
+            foreach ($container->findTaggedServiceIds('templating.helper') as $id => $attributes) {
+                if (isset($attributes[0]['alias'])) {
+                    $helpers[$attributes[0]['alias']] = $id;
+                }
+            }
+
+            if (count($helpers) > 0) {
+                $definition = $container->getDefinition('templating.engine.php');
+                $definition->addMethodCall('setHelpers', array($helpers));
+            }
+        }
+    }
+}