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backend/vendor/symfony/config/Definition/Builder/TreeBuilder.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\NodeInterface;
+
+/**
+ * This is the entry class for building a config tree.
+ *
+ * @template T of 'array'|'variable'|'scalar'|'string'|'boolean'|'integer'|'float'|'enum' = 'array'
+ *
+ * @author Johannes M. Schmitt <schmittjoh@gmail.com>
+ */
+class TreeBuilder implements NodeParentInterface
+{
+    protected ?NodeInterface $tree = null;
+    /**
+     * @var NodeDefinition<$this>|null
+     */
+    protected ?NodeDefinition $root = null;
+
+    /**
+     * @param T $type
+     */
+    public function __construct(string $name, string $type = 'array', ?NodeBuilder $builder = null)
+    {
+        $builder ??= new NodeBuilder();
+        $this->root = $builder->node($name, $type)->setParent($this);
+    }
+
+    /**
+     * @return (
+     *    T is 'array' ? ArrayNodeDefinition<$this>
+     *    : (T is 'variable' ? VariableNodeDefinition<$this>
+     *    : (T is 'scalar' ? ScalarNodeDefinition<$this>
+     *    : (T is 'string' ? StringNodeDefinition<$this>
+     *    : (T is 'boolean' ? BooleanNodeDefinition<$this>
+     *    : (T is 'integer' ? IntegerNodeDefinition<$this>
+     *    : (T is 'float' ? FloatNodeDefinition<$this>
+     *    : (T is 'enum' ? EnumNodeDefinition<$this>
+     *    : NodeDefinition<$this>)))))))
+     * )
+     */
+    public function getRootNode(): NodeDefinition
+    {
+        return $this->root;
+    }
+
+    public function buildTree(): NodeInterface
+    {
+        return $this->tree ??= $this->root->getNode(true);
+    }
+
+    public function setPathSeparator(string $separator): void
+    {
+        // unset last built as changing path separator changes all nodes
+        $this->tree = null;
+
+        $this->root->setPathSeparator($separator);
+    }
+}