From 12d59465cb78ba058192ec4ce3039aa097bf2696 Mon Sep 17 00:00:00 2001
From: Christoph Hertzberg <chtz@informatik.uni-bremen.de>
Date: Tue, 30 Sep 2014 14:57:54 +0200
Subject: bug #884: Copy constructor of Ref shall never malloc, constructing
 from other RefBase shall only malloc if the memory layout is incompatible.

---
 Eigen/src/Core/Ref.h | 9 +++++++++
 1 file changed, 9 insertions(+)

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

diff --git a/Eigen/src/Core/Ref.h b/Eigen/src/Core/Ref.h
index 09921c9e7..2653f2bbe 100644
--- a/Eigen/src/Core/Ref.h
+++ b/Eigen/src/Core/Ref.h
@@ -232,6 +232,15 @@ template<typename TPlainObjectType, int Options, typename StrideType> class Ref<
       construct(expr.derived(), typename Traits::template match<Derived>::type());
     }
 
+    inline Ref(const Ref& other) : Base(other) {
+      // copy constructor shall not copy the m_object, to avoid unnecessary malloc and copy
+    }
+
+    template<typename OtherRef>
+    inline Ref(const RefBase<OtherRef>& other) {
+      construct(other.derived(), typename Traits::template match<OtherRef>::type());
+    }
+
   protected:
 
     template<typename Expression>
-- 
cgit v1.2.3