From e57fe4ab2ffd9a85e123367aa2ccb6c8979089f8 Mon Sep 17 00:00:00 2001
From: acxz <17132214+acxz@users.noreply.github.com>
Date: Sun, 20 Jun 2021 19:03:33 -0400
Subject: [PATCH] add comment for purpose of variable

---
 gtsam/base/treeTraversal/parallelTraversalTasks.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gtsam/base/treeTraversal/parallelTraversalTasks.h b/gtsam/base/treeTraversal/parallelTraversalTasks.h
index 5501abe46..dc1b45906 100644
--- a/gtsam/base/treeTraversal/parallelTraversalTasks.h
+++ b/gtsam/base/treeTraversal/parallelTraversalTasks.h
@@ -45,6 +45,7 @@ namespace gtsam {
         tbb::task_group& tg;
         bool makeNewTasks;
 
+        // Keep track of order phase across multiple calls to the same functor
         mutable bool isPostOrderPhase;
 
         PreOrderTask(const boost::shared_ptr<NODE>& treeNode, const boost::shared_ptr<DATA>& myData,