From e7d8ba747c7b161eff59959d4d2a5acf788ee00e Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Thu, 10 Oct 2019 17:41:47 +0200
Subject: bug #1752: make is_convertible equivalent to the std c++11 equivalent
 and fallback to std::is_convertible when c++11 is enabled.

---
 test/meta.cpp | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'test/meta.cpp')

diff --git a/test/meta.cpp b/test/meta.cpp
index 51395acd0..b432d9316 100644
--- a/test/meta.cpp
+++ b/test/meta.cpp
@@ -87,8 +87,12 @@ EIGEN_DECLARE_TEST(meta)
   STATIC_CHECK(( internal::is_convertible<const Matrix3f&,const Matrix3f&>::value ));
   STATIC_CHECK((!internal::is_convertible<const Matrix3f&,Matrix3f&>::value ));
   STATIC_CHECK((!internal::is_convertible<const Matrix3f,Matrix3f&>::value ));
-  STATIC_CHECK(( internal::is_convertible<Matrix3f,Matrix3f&>::value )); // std::is_convertible returns false here though Matrix3f from; Matrix3f& to = from; is valid.
-  //STATIC_CHECK((!internal::is_convertible<Matrix3f,Matrix3d>::value )); //does not work because the conversion is prevented by a static assertion
+  STATIC_CHECK(!( internal::is_convertible<Matrix3f,Matrix3f&>::value ));
+
+  STATIC_CHECK(!( internal::is_convertible<int,int&>::value ));
+  STATIC_CHECK(( internal::is_convertible<const int,const int& >::value ));
+
+  //STATIC_CHECK((!internal::is_convertible<Matrix3f,Matrix3d>::value )); //does not even compile because the conversion is prevented by a static assertion
   STATIC_CHECK((!internal::is_convertible<Array33f,int>::value ));
   STATIC_CHECK((!internal::is_convertible<MatrixXf,float>::value ));
   {
-- 
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