From 8f249e8b5459ed79914db7847cebd3a40458bd8b Mon Sep 17 00:00:00 2001
From: Benoit Jacob <jacob.benoit.1@gmail.com>
Date: Fri, 30 Apr 2010 14:28:35 -0400
Subject: [PATCH] fix compilation: const (T&) != const T& , use ei_makeconst

---
 Eigen/src/Core/MathFunctions.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/Eigen/src/Core/MathFunctions.h b/Eigen/src/Core/MathFunctions.h
index 74dda7139..c24665a4b 100644
--- a/Eigen/src/Core/MathFunctions.h
+++ b/Eigen/src/Core/MathFunctions.h
@@ -161,7 +161,7 @@ struct ei_real_ref_retval
 };
 
 template<typename Scalar>
-inline const EIGEN_MATHFUNC_RETVAL(real_ref, Scalar) ei_real_ref(const Scalar& x)
+inline typename ei_makeconst< EIGEN_MATHFUNC_RETVAL(real_ref, Scalar) >::type ei_real_ref(const Scalar& x)
 {
   return ei_real_ref_impl<Scalar>::run(x);
 }
@@ -213,7 +213,7 @@ struct ei_imag_ref_retval
 };
 
 template<typename Scalar>
-inline const EIGEN_MATHFUNC_RETVAL(imag_ref, Scalar) ei_imag_ref(const Scalar& x)
+inline typename ei_makeconst< EIGEN_MATHFUNC_RETVAL(imag_ref, Scalar) >::type ei_imag_ref(const Scalar& x)
 {
   return ei_imag_ref_impl<Scalar>::run(x);
 }