From d813fdbc0935c7e5be8ff22017fec66ba4ff7b73 Mon Sep 17 00:00:00 2001
From: David Maicher <mail@dmaicher.de>
Date: Tue, 30 Jul 2024 18:41:34 +0200
Subject: [PATCH] prevent calling ->end() on root node (#45)

---
 src/Node/Node.php | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/Node/Node.php b/src/Node/Node.php
index a28809e..4415ced 100644
--- a/src/Node/Node.php
+++ b/src/Node/Node.php
@@ -152,8 +152,12 @@ public function child(?string $label = null): self
         return $child;
     }
 
-    public function end(): ?self
+    public function end(): self
     {
+        if ($this->parent === null) {
+            throw new \LogicException('Cannot call end() on root node');
+        }
+
         return $this->parent;
     }