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vendor/symfony/expression-language/Node/NullCoalesceNode.php

@@ -0,0 +1,65 @@
+<?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\ExpressionLanguage\Node;
+
+use Symfony\Component\ExpressionLanguage\Compiler;
+
+/**
+ * @author Fabien Potencier <fabien@symfony.com>
+ *
+ * @internal
+ */
+class NullCoalesceNode extends Node
+{
+    public function __construct(Node $expr1, Node $expr2)
+    {
+        parent::__construct(['expr1' => $expr1, 'expr2' => $expr2]);
+    }
+
+    public function compile(Compiler $compiler): void
+    {
+        $compiler
+            ->raw('((')
+            ->compile($this->nodes['expr1'])
+            ->raw(') ?? (')
+            ->compile($this->nodes['expr2'])
+            ->raw('))')
+        ;
+    }
+
+    public function evaluate(array $functions, array $values): mixed
+    {
+        if ($this->nodes['expr1'] instanceof GetAttrNode) {
+            $this->addNullCoalesceAttributeToGetAttrNodes($this->nodes['expr1']);
+        }
+
+        return $this->nodes['expr1']->evaluate($functions, $values) ?? $this->nodes['expr2']->evaluate($functions, $values);
+    }
+
+    public function toArray(): array
+    {
+        return ['(', $this->nodes['expr1'], ') ?? (', $this->nodes['expr2'], ')'];
+    }
+
+    private function addNullCoalesceAttributeToGetAttrNodes(Node $node): void
+    {
+        if (!$node instanceof GetAttrNode) {
+            return;
+        }
+
+        $node->attributes['is_null_coalesce'] = true;
+
+        foreach ($node->nodes as $node) {
+            $this->addNullCoalesceAttributeToGetAttrNodes($node);
+        }
+    }
+}