prevent calling ->end() on root node (#45)

dmaicher · Jul 30, 2024 · d813fdb · d813fdb
1 parent 2e52bd5
commit d813fdb
Showing 1 changed file with 5 additions and 1 deletion.
diff --git 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;
     }