From 1ce50a8258d879b4a7d80727845261f83c9b8114 Mon Sep 17 00:00:00 2001
From: Manohar Paluri <balamanohar@gmail.com>
Date: Fri, 28 Aug 2009 14:55:33 +0000
Subject: [PATCH] changed  get_delta to const ( using find operator of a map
 instead of []  )

---
 cpp/ConstrainedChordalBayesNet.h | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/cpp/ConstrainedChordalBayesNet.h b/cpp/ConstrainedChordalBayesNet.h
index 4deffe83a..39dcd6f35 100644
--- a/cpp/ConstrainedChordalBayesNet.h
+++ b/cpp/ConstrainedChordalBayesNet.h
@@ -51,7 +51,12 @@ public:
 	ChordalBayesNet convert() const;
 
 	/** get delta functions by key */
-	DeltaFunction::shared_ptr get_delta(const std::string& key) {return delta_nodes[key];}
+	DeltaFunction::shared_ptr get_delta(const std::string& key) const
+	{
+		const_delta_iterator cg = delta_nodes.find(key);
+		assert( cg != delta_nodes.end() );
+		return cg->second;
+	}
 
 	/** check equality */
 	bool equals(const ConstrainedChordalBayesNet& cbn) const;