From 13ce0e59f0e2fbbd7fb244d192f19a0799a0b101 Mon Sep 17 00:00:00 2001
From: Richard Roberts <richard.jw.roberts@gmail.com>
Date: Thu, 22 Mar 2012 17:46:39 +0000
Subject: [PATCH] Added typedef for const shared_ptr

---
 gtsam/nonlinear/Values.h | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/gtsam/nonlinear/Values.h b/gtsam/nonlinear/Values.h
index bdd1739da..76bcfdfb0 100644
--- a/gtsam/nonlinear/Values.h
+++ b/gtsam/nonlinear/Values.h
@@ -84,6 +84,9 @@ namespace gtsam {
     /// A shared_ptr to this class
     typedef boost::shared_ptr<Values> shared_ptr;
 
+    /// A const shared_ptr to this class
+    typedef boost::shared_ptr<const Values> const_shared_ptr;
+
     /// A key-value pair, which you get by dereferencing iterators
     struct KeyValuePair {
       const Key key; ///< The key