From 360a79d6f8ba5dbbc10857c6fbdcc73d98818e0e Mon Sep 17 00:00:00 2001
From: Gael Guennebaud <g.gael@free.fr>
Date: Fri, 6 Apr 2012 00:22:13 +0200
Subject: [PATCH] Replicate now makes use of the cost model to evaluate its
 nested expression (transplanted from 311c5b87a3cba60dd83273212228b5ce800d398c
 )

---
 Eigen/src/Core/Replicate.h | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Eigen/src/Core/Replicate.h b/Eigen/src/Core/Replicate.h
index d2f9712db..4c171f8d5 100644
--- a/Eigen/src/Core/Replicate.h
+++ b/Eigen/src/Core/Replicate.h
@@ -48,7 +48,10 @@ struct traits<Replicate<MatrixType,RowFactor,ColFactor> >
   typedef typename MatrixType::Scalar Scalar;
   typedef typename traits<MatrixType>::StorageKind StorageKind;
   typedef typename traits<MatrixType>::XprKind XprKind;
-  typedef typename nested<MatrixType>::type MatrixTypeNested;
+  enum {
+    Factor = (RowFactor==Dynamic || ColFactor==Dynamic) ? Dynamic : RowFactor*ColFactor
+  };
+  typedef typename nested<MatrixType,Factor>::type MatrixTypeNested;
   typedef typename remove_reference<MatrixTypeNested>::type _MatrixTypeNested;
   enum {
     RowsAtCompileTime = RowFactor==Dynamic || int(MatrixType::RowsAtCompileTime)==Dynamic
@@ -72,6 +75,8 @@ struct traits<Replicate<MatrixType,RowFactor,ColFactor> >
 template<typename MatrixType,int RowFactor,int ColFactor> class Replicate
   : public internal::dense_xpr_base< Replicate<MatrixType,RowFactor,ColFactor> >::type
 {
+    typedef typename internal::traits<Replicate>::MatrixTypeNested MatrixTypeNested;
+    typedef typename internal::traits<Replicate>::_MatrixTypeNested _MatrixTypeNested;
   public:
 
     typedef typename internal::dense_xpr_base<Replicate>::type Base;
@@ -124,7 +129,7 @@ template<typename MatrixType,int RowFactor,int ColFactor> class Replicate
 
 
   protected:
-    const typename MatrixType::Nested m_matrix;
+    const MatrixTypeNested m_matrix;
     const internal::variable_if_dynamic<Index, RowFactor> m_rowFactor;
     const internal::variable_if_dynamic<Index, ColFactor> m_colFactor;
 };