From ef3ad5fc463058051dc80ebb9c2006361804363a Mon Sep 17 00:00:00 2001
From: Jackson Campolattaro <jackcamp@vt.edu>
Date: Tue, 30 Jun 2020 12:26:12 -0400
Subject: [PATCH] Use const ref to split criterion function

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

diff --git a/Octree/include/CGAL/Octree.h b/Octree/include/CGAL/Octree.h
index 72e16d79cca..4bf02272394 100644
--- a/Octree/include/CGAL/Octree.h
+++ b/Octree/include/CGAL/Octree.h
@@ -173,7 +173,7 @@ namespace CGAL {
         m_root.unsplit();
       }
 
-      void refine(std::function<bool(const Node &)> split_criterion) {
+      void refine(const std::function<bool(const Node &)> &split_criterion) {
 
         // create a side length map
         for (int i = 0; i <= (int) 10; i++)