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vendor/symfony/http-kernel/Controller/ArgumentResolver/DefaultValueResolver.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\HttpKernel\Controller\ArgumentResolver;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpKernel\Controller\ArgumentValueResolverInterface;
+use Symfony\Component\HttpKernel\Controller\ValueResolverInterface;
+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, ValueResolverInterface
+{
+    /**
+     * @deprecated since Symfony 6.2, use resolve() instead
+     */
+    public function supports(Request $request, ArgumentMetadata $argument): bool
+    {
+        @trigger_deprecation('symfony/http-kernel', '6.2', 'The "%s()" method is deprecated, use "resolve()" instead.', __METHOD__);
+
+        return $argument->hasDefaultValue() || (null !== $argument->getType() && $argument->isNullable() && !$argument->isVariadic());
+    }
+
+    public function resolve(Request $request, ArgumentMetadata $argument): array
+    {
+        if ($argument->hasDefaultValue()) {
+            return [$argument->getDefaultValue()];
+        }
+
+        if (null !== $argument->getType() && $argument->isNullable() && !$argument->isVariadic()) {
+            return [null];
+        }
+
+        return [];
+    }
+}