From f5a05e7ed159d771545767c430d12263e205ec87 Mon Sep 17 00:00:00 2001
From: Benoit Jacob <jacob.benoit.1@gmail.com>
Date: Sun, 21 Dec 2008 20:55:46 +0000
Subject: unfuck v.cwise()*w where v is real and w is complex

---
 Eigen/src/Core/Functors.h | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

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

diff --git a/Eigen/src/Core/Functors.h b/Eigen/src/Core/Functors.h
index 6784ea946..347f1b252 100644
--- a/Eigen/src/Core/Functors.h
+++ b/Eigen/src/Core/Functors.h
@@ -348,11 +348,15 @@ template<typename Scalar>
 struct ei_functor_traits<ei_scalar_identity_op<Scalar> >
 { enum { Cost = NumTraits<Scalar>::AddCost, PacketAccess = false, IsRepeatable = true }; };
 
-// FIXME quick hack:
 // all functors allow linear access, except ei_scalar_identity_op. So we fix here a quick meta
 // to indicate whether a functor allows linear access, just always answering 'yes' except for
 // ei_scalar_identity_op.
 template<typename Functor> struct ei_functor_has_linear_access { enum { ret = 1 }; };
 template<typename Scalar> struct ei_functor_has_linear_access<ei_scalar_identity_op<Scalar> > { enum { ret = 0 }; };
 
+// in CwiseBinaryOp, we require the Lhs and Rhs to have the same scalar type, except for multiplication
+// where we only require them to have the same _real_ scalar type so one may multiply, say, float by complex<float>.
+template<typename Functor> struct ei_functor_allows_mixing_real_and_complex { enum { ret = 0 }; };
+template<typename Scalar> struct ei_functor_allows_mixing_real_and_complex<ei_scalar_product_op<Scalar> > { enum { ret = 1 }; };
+
 #endif // EIGEN_FUNCTORS_H
-- 
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