From fe85b7ebc69d98d65c0d70b189416c384408b6f7 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 3 Feb 2012 23:18:26 +0100
Subject: fix several const qualifier issues: double ones, meaningless ones,
 some missing ones, etc. (note that const qualifiers are set by
 internall::nested)

---
 Eigen/src/Core/Swap.h | 9 +++++++++
 1 file changed, 9 insertions(+)

(limited to 'Eigen/src/Core/Swap.h')

diff --git a/Eigen/src/Core/Swap.h b/Eigen/src/Core/Swap.h
index 5fdd36e3b..4bf23c8c1 100644
--- a/Eigen/src/Core/Swap.h
+++ b/Eigen/src/Core/Swap.h
@@ -52,6 +52,15 @@ template<typename ExpressionType> class SwapWrapper
     inline Index cols() const { return m_expression.cols(); }
     inline Index outerStride() const { return m_expression.outerStride(); }
     inline Index innerStride() const { return m_expression.innerStride(); }
+    
+    typedef typename internal::conditional<
+                       internal::is_lvalue<ExpressionType>::value,
+                       Scalar,
+                       const Scalar
+                     >::type ScalarWithConstIfNotLvalue;
+                     
+    inline ScalarWithConstIfNotLvalue* data() { return m_expression.data(); }
+    inline const Scalar* data() const { return m_expression.data(); }
 
     inline Scalar& coeffRef(Index row, Index col)
     {
-- 
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