From 4056db01e79eea090e0cb3688e614d2779672d72 Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 25 Jun 2010 13:52:23 +0200
Subject: [PATCH] use const Scalar& instead of Scalar for function arguments

---
 Eigen/src/plugins/ArrayCwiseUnaryOps.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Eigen/src/plugins/ArrayCwiseUnaryOps.h b/Eigen/src/plugins/ArrayCwiseUnaryOps.h
index fc54005f7..9695bf921 100644
--- a/Eigen/src/plugins/ArrayCwiseUnaryOps.h
+++ b/Eigen/src/plugins/ArrayCwiseUnaryOps.h
@@ -149,7 +149,7 @@ cube() const
 
 #define EIGEN_MAKE_SCALAR_CWISE_UNARY_OP(METHOD_NAME,FUNCTOR) \
   inline const CwiseUnaryOp<std::binder2nd<FUNCTOR<Scalar> >,Derived> \
-  METHOD_NAME(Scalar s) const { \
+  METHOD_NAME(const Scalar& s) const { \
     return CwiseUnaryOp<std::binder2nd<FUNCTOR<Scalar> >,Derived> \
             (derived(), std::bind2nd(FUNCTOR<Scalar>(), s)); \
   }