From 3431c052c6238a13138445fee554cbfb4d80b762 Mon Sep 17 00:00:00 2001
From: Hauke Heibel <hauke.heibel@gmail.com>
Date: Thu, 28 Jul 2011 09:35:17 +0200
Subject: [PATCH] Improved compilation errors for Transform
 initialization/assignment with different numeric types.

---
 Eigen/src/Geometry/Transform.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Eigen/src/Geometry/Transform.h b/Eigen/src/Geometry/Transform.h
index 19d012572..c6e12f260 100644
--- a/Eigen/src/Geometry/Transform.h
+++ b/Eigen/src/Geometry/Transform.h
@@ -279,6 +279,9 @@ public:
   template<typename OtherDerived>
   inline explicit Transform(const EigenBase<OtherDerived>& other)
   {
+    EIGEN_STATIC_ASSERT((internal::is_same<Scalar,typename OtherDerived::Scalar>::value),
+      YOU_MIXED_DIFFERENT_NUMERIC_TYPES__YOU_NEED_TO_USE_THE_CAST_METHOD_OF_MATRIXBASE_TO_CAST_NUMERIC_TYPES_EXPLICITLY);
+
     check_template_params();
     internal::transform_construct_from_matrix<OtherDerived,Mode,Options,Dim,HDim>::run(this, other.derived());
   }
@@ -287,6 +290,9 @@ public:
   template<typename OtherDerived>
   inline Transform& operator=(const EigenBase<OtherDerived>& other)
   {
+    EIGEN_STATIC_ASSERT((internal::is_same<Scalar,typename OtherDerived::Scalar>::value),
+      YOU_MIXED_DIFFERENT_NUMERIC_TYPES__YOU_NEED_TO_USE_THE_CAST_METHOD_OF_MATRIXBASE_TO_CAST_NUMERIC_TYPES_EXPLICITLY);
+
     internal::transform_construct_from_matrix<OtherDerived,Mode,Options,Dim,HDim>::run(this, other.derived());
     return *this;
   }