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vendor/symfony/config/Definition/Builder/EnumNodeDefinition.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\Config\Definition\Builder;
+
+use Symfony\Component\Config\Definition\EnumNode;
+
+/**
+ * Enum Node Definition.
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class EnumNodeDefinition extends ScalarNodeDefinition
+{
+    private array $values;
+    private string $enumFqcn;
+
+    /**
+     * @return $this
+     */
+    public function values(array $values): static
+    {
+        if (!$values) {
+            throw new \InvalidArgumentException('->values() must be called with at least one value.');
+        }
+
+        $this->values = $values;
+
+        return $this;
+    }
+
+    /**
+     * @param class-string<\UnitEnum> $enumFqcn
+     *
+     * @return $this
+     */
+    public function enumFqcn(string $enumFqcn): static
+    {
+        if (!enum_exists($enumFqcn)) {
+            throw new \InvalidArgumentException(\sprintf('The enum class "%s" does not exist.', $enumFqcn));
+        }
+
+        $this->enumFqcn = $enumFqcn;
+
+        return $this;
+    }
+
+    /**
+     * Instantiate a Node.
+     *
+     * @throws \RuntimeException
+     */
+    protected function instantiateNode(): EnumNode
+    {
+        if (!isset($this->values) && !isset($this->enumFqcn)) {
+            throw new \RuntimeException('You must call either ->values() or ->enumFqcn() on enum nodes.');
+        }
+
+        if (isset($this->values) && isset($this->enumFqcn)) {
+            throw new \RuntimeException('You must call either ->values() or ->enumFqcn() on enum nodes but not both.');
+        }
+
+        return new EnumNode($this->name, $this->parent, $this->values ?? [], $this->pathSeparator, $this->enumFqcn ?? null);
+    }
+}