From e670e00e3bfada70fb515a2c2179b4332c6609f7 Mon Sep 17 00:00:00 2001
From: Manohar Paluri <balamanohar@gmail.com>
Date: Mon, 1 Mar 2010 18:08:18 +0000
Subject: [PATCH] added const Tensor3expression

---
 cpp/Tensor3.h | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/cpp/Tensor3.h b/cpp/Tensor3.h
index 5959eaa11..64b3e33ea 100644
--- a/cpp/Tensor3.h
+++ b/cpp/Tensor3.h
@@ -46,6 +46,14 @@ namespace tensors {
 			return Tensor3Expression<Tensor3, Index<N1, I> , Index<N2, J> , Index<N3,
 					K> > (*this);
 		}
+
+		/** convert to expression */
+		template<char I, char J, char K> Tensor3Expression<const Tensor3, Index<N1, I> ,
+				Index<N2, J> , Index<N3, K> > operator()(const Index<N1, I>& i,
+				const Index<N2, J>& j, const Index<N3, K>& k) const {
+			return Tensor3Expression<const Tensor3, Index<N1, I> , Index<N2, J> , Index<N3,
+					K> > (*this);
+		}
 	}; // Tensor3
 
 	/** Rank 3 permutation tensor */