From c036482969f4d05777a3047590569da2c4f42930 Mon Sep 17 00:00:00 2001
From: Sebastian Ahlman <sebastian.ahlman@gmail.com>
Date: Thu, 19 Mar 2020 13:31:44 +0200
Subject: [PATCH] Tree is declared as a struct, so it needs to be
 forward-declared as a struct too.

---
 include/behaviortree_cpp_v3/tree_node.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/behaviortree_cpp_v3/tree_node.h b/include/behaviortree_cpp_v3/tree_node.h
index 7d94f6eb3..272a89742 100644
--- a/include/behaviortree_cpp_v3/tree_node.h
+++ b/include/behaviortree_cpp_v3/tree_node.h
@@ -153,7 +153,7 @@ class TreeNode
     friend class BehaviorTreeFactory;
     friend class DecoratorNode;
     friend class ControlNode;
-    friend class Tree;
+    friend struct Tree;
 
     // Only BehaviorTreeFactory should call this
     void setRegistrationID(StringView ID)