From c16b80746aaa0bb865d55b2d1cefac0f54f7cd3e Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Wed, 19 Feb 2014 11:30:58 +0100
Subject: [PATCH] isApprox must honors nested_eval

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

diff --git a/Eigen/src/Core/Fuzzy.h b/Eigen/src/Core/Fuzzy.h
index f9a88dd3c..9c8d10683 100644
--- a/Eigen/src/Core/Fuzzy.h
+++ b/Eigen/src/Core/Fuzzy.h
@@ -23,8 +23,13 @@ struct isApprox_selector
   static bool run(const Derived& x, const OtherDerived& y, const typename Derived::RealScalar& prec)
   {
     EIGEN_USING_STD_MATH(min);
+#ifdef EIGEN_TEST_EVALUATORS
+    typename internal::nested_eval<Derived,2>::type nested(x);
+    typename internal::nested_eval<OtherDerived,2>::type otherNested(y);
+#else
     typename internal::nested<Derived,2>::type nested(x);
     typename internal::nested<OtherDerived,2>::type otherNested(y);
+#endif
     return (nested - otherNested).cwiseAbs2().sum() <= prec * prec * (min)(nested.cwiseAbs2().sum(), otherNested.cwiseAbs2().sum());
   }
 };