From 1cb59e478137a1399214a1a5caddf1871556a53a Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Tue, 9 Feb 2010 11:27:30 +0100
Subject: [PATCH] fix nesting lazy prod by ref

---
 Eigen/src/Core/NoAlias.h | 4 ++--
 Eigen/src/Core/Product.h | 2 +-
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/Eigen/src/Core/NoAlias.h b/Eigen/src/Core/NoAlias.h
index 9d6cab7f9..30ddbeb3c 100644
--- a/Eigen/src/Core/NoAlias.h
+++ b/Eigen/src/Core/NoAlias.h
@@ -72,11 +72,11 @@ class NoAlias
 
     template<typename Lhs, typename Rhs, int NestingFlags>
     EIGEN_STRONG_INLINE ExpressionType& operator+=(const CoeffBasedProduct<Lhs,Rhs,NestingFlags>& other)
-    { return m_expression.derived() += CoeffBasedProduct<Lhs,Rhs,0>(other.lhs(), other.rhs()); }
+    { return m_expression.derived() += CoeffBasedProduct<Lhs,Rhs,NestByRefBit>(other.lhs(), other.rhs()); }
 
     template<typename Lhs, typename Rhs, int NestingFlags>
     EIGEN_STRONG_INLINE ExpressionType& operator-=(const CoeffBasedProduct<Lhs,Rhs,NestingFlags>& other)
-    { return m_expression.derived() -= CoeffBasedProduct<Lhs,Rhs,0>(other.lhs(), other.rhs()); }
+    { return m_expression.derived() -= CoeffBasedProduct<Lhs,Rhs,NestByRefBit>(other.lhs(), other.rhs()); }
 #endif
 
   protected:
diff --git a/Eigen/src/Core/Product.h b/Eigen/src/Core/Product.h
index e643b2ea7..07aeae165 100644
--- a/Eigen/src/Core/Product.h
+++ b/Eigen/src/Core/Product.h
@@ -146,7 +146,7 @@ struct ProductReturnType<Lhs,Rhs,LazyCoeffBasedProductMode>
 {
   typedef typename ei_nested<Lhs, Rhs::ColsAtCompileTime, typename ei_plain_matrix_type<Lhs>::type >::type LhsNested;
   typedef typename ei_nested<Rhs, Lhs::RowsAtCompileTime, typename ei_plain_matrix_type<Rhs>::type >::type RhsNested;
-  typedef CoeffBasedProduct<LhsNested, RhsNested, 0> Type;
+  typedef CoeffBasedProduct<LhsNested, RhsNested, NestByRefBit> Type;
 };