From 5cab2dcf6116eee02a53b28e87b1bd77f070dd32 Mon Sep 17 00:00:00 2001
From: Jeremiah Willcock <jewillco@osl.iu.edu>
Date: Wed, 20 Jun 2012 16:37:50 +0000
Subject: [PATCH] Changed grid_graph_index_map to use raw pointer to graph
 based on suggestion by Sergey Mitsyn

[SVN r79017]
---
 include/boost/graph/grid_graph.hpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/boost/graph/grid_graph.hpp b/include/boost/graph/grid_graph.hpp
index f63f3d01..7bb37324 100644
--- a/include/boost/graph/grid_graph.hpp
+++ b/include/boost/graph/grid_graph.hpp
@@ -17,7 +17,6 @@
 #include <boost/array.hpp>
 #include <boost/bind.hpp>
 #include <boost/limits.hpp>
-#include <boost/make_shared.hpp>
 #include <boost/graph/graph_traits.hpp>
 #include <boost/graph/properties.hpp>
 #include <boost/iterator/counting_iterator.hpp>
@@ -63,14 +62,14 @@ namespace boost {
     grid_graph_index_map() { }
 
     grid_graph_index_map(const Graph& graph) :
-      m_graph(make_shared<Graph>(graph)) { }
+      m_graph(&graph) { }
 
     value_type operator[](key_type key) const {
       return (m_graph->index_of(key));
     }
 
   protected:
-    shared_ptr<Graph> m_graph;
+    const Graph* m_graph;
   };
 
   template<BOOST_GRID_GRAPH_TEMPLATE_PARAMS>