From 6d432eae5df88fe249d4db10c31647fa27872c8e Mon Sep 17 00:00:00 2001
From: Rasmus Munk Larsen <rmlarsen@google.com>
Date: Wed, 5 Jun 2019 16:42:27 -0700
Subject: [PATCH] Make is_valid_index_type return false for float and double
 when EIGEN_HAS_TYPE_TRAITS is off.

---
 Eigen/src/Core/util/XprHelper.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Eigen/src/Core/util/XprHelper.h b/Eigen/src/Core/util/XprHelper.h
index bbad66d33..9568b87b1 100644
--- a/Eigen/src/Core/util/XprHelper.h
+++ b/Eigen/src/Core/util/XprHelper.h
@@ -44,7 +44,7 @@ template<typename T> struct is_valid_index_type
     internal::is_integral<T>::value || __is_enum(T)
 #else
     // without C++11, we use is_convertible to Index instead of is_integral in order to treat enums as Index.
-    internal::is_convertible<T,Index>::value
+    internal::is_convertible<T,Index>::value && !internal::is_same<T,float>::value && !is_same<T,double>::value
 #endif
   };
 };