From aae19c70ac273a2d40daf18a3cd15c0b0075662b Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 17 Mar 2017 17:33:15 +0100
Subject: update has_ReturnType to be more consistent with other has_ helpers

---
 Eigen/src/Core/util/Meta.h | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

(limited to 'Eigen/src/Core/util/Meta.h')

diff --git a/Eigen/src/Core/util/Meta.h b/Eigen/src/Core/util/Meta.h
index 90eda6e70..8de605500 100755
--- a/Eigen/src/Core/util/Meta.h
+++ b/Eigen/src/Core/util/Meta.h
@@ -433,10 +433,10 @@ struct meta_no  { char a[2]; };
 template <typename T>
 struct has_ReturnType
 {
-  template <typename C> static meta_yes testFunctor(typename C::ReturnType const *);
-  template <typename C> static meta_no testFunctor(...);
+  template <typename C> static meta_yes testFunctor(C const *, typename C::ReturnType const * = 0);
+  template <typename C> static meta_no  testFunctor(...);
 
-  enum { value = sizeof(testFunctor<T>(0)) == sizeof(meta_yes) };
+  enum { value = sizeof(testFunctor<T>(static_cast<T*>(0))) == sizeof(meta_yes) };
 };
 
 template<typename T> const T* return_ptr();
-- 
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