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admin/phpMyAdmin/vendor/symfony/dependency-injection/Compiler/RemoveUnusedDefinitionsPass.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\Component\DependencyInjection\Compiler;
+
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Reference;
+
+/**
+ * Removes unused service definitions from the container.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ * @author Nicolas Grekas <p@tchwork.com>
+ */
+class RemoveUnusedDefinitionsPass extends AbstractRecursivePass implements RepeatablePassInterface
+{
+    private $connectedIds = [];
+
+    /**
+     * {@inheritdoc}
+     */
+    public function setRepeatedPass(RepeatedPass $repeatedPass)
+    {
+        @trigger_error(sprintf('The "%s()" method is deprecated since Symfony 4.2.', __METHOD__), \E_USER_DEPRECATED);
+    }
+
+    /**
+     * Processes the ContainerBuilder to remove unused definitions.
+     */
+    public function process(ContainerBuilder $container)
+    {
+        try {
+            $this->enableExpressionProcessing();
+            $this->container = $container;
+            $connectedIds = [];
+            $aliases = $container->getAliases();
+
+            foreach ($aliases as $id => $alias) {
+                if ($alias->isPublic()) {
+                    $this->connectedIds[] = (string) $aliases[$id];
+                }
+            }
+
+            foreach ($container->getDefinitions() as $id => $definition) {
+                if ($definition->isPublic()) {
+                    $connectedIds[$id] = true;
+                    $this->processValue($definition);
+                }
+            }
+
+            while ($this->connectedIds) {
+                $ids = $this->connectedIds;
+                $this->connectedIds = [];
+                foreach ($ids as $id) {
+                    if (!isset($connectedIds[$id]) && $container->hasDefinition($id)) {
+                        $connectedIds[$id] = true;
+                        $this->processValue($container->getDefinition($id));
+                    }
+                }
+            }
+
+            foreach ($container->getDefinitions() as $id => $definition) {
+                if (!isset($connectedIds[$id])) {
+                    $container->removeDefinition($id);
+                    $container->resolveEnvPlaceholders(!$definition->hasErrors() ? serialize($definition) : $definition);
+                    $container->log($this, sprintf('Removed service "%s"; reason: unused.', $id));
+                }
+            }
+        } finally {
+            $this->container = null;
+            $this->connectedIds = [];
+        }
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function processValue($value, $isRoot = false)
+    {
+        if (!$value instanceof Reference) {
+            return parent::processValue($value, $isRoot);
+        }
+
+        if (ContainerBuilder::IGNORE_ON_UNINITIALIZED_REFERENCE !== $value->getInvalidBehavior()) {
+            $this->connectedIds[] = (string) $value;
+        }
+
+        return $value;
+    }
+}