From aafbceccc76dccb75963dd4f596fd1f10ee34b03 Mon Sep 17 00:00:00 2001
From: Jonathan Wakely <boost@kayari.org>
Date: Fri, 5 Jun 2020 19:29:27 +0100
Subject: [PATCH] Make index::detail::rtree::visitors::insert base class public

Fixes #721
---
 include/boost/geometry/index/detail/rtree/visitors/insert.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/geometry/index/detail/rtree/visitors/insert.hpp b/include/boost/geometry/index/detail/rtree/visitors/insert.hpp
index 2d324cb7f4..5709a930cc 100644
--- a/include/boost/geometry/index/detail/rtree/visitors/insert.hpp
+++ b/include/boost/geometry/index/detail/rtree/visitors/insert.hpp
@@ -265,7 +265,7 @@ struct insert_traverse_data
 // Default insert visitor
 template <typename Element, typename MembersHolder>
 class insert
-    : MembersHolder::visitor
+    : public MembersHolder::visitor
 {
 protected:
     typedef typename MembersHolder::box_type box_type;