From abc8c010807f0706b80bc0ef13303b6485473a57 Mon Sep 17 00:00:00 2001
From: Hauke Heibel <hauke.heibel@gmail.com>
Date: Sat, 20 Feb 2010 15:53:57 +0100
Subject: [PATCH] Renamed PlainMatrixType to PlainObject (Array != Matrix).
 Renamed ReturnByValue::ReturnMatrixType ReturnByValue::ReturnType (again,
 Array != Matrix).

---
 Eigen/src/Array/Array.h                       |  2 +-
 Eigen/src/Array/ArrayBase.h                   |  4 +--
 Eigen/src/Array/VectorwiseOp.h                |  2 +-
 Eigen/src/Cholesky/LDLT.h                     |  2 +-
 Eigen/src/Cholesky/LLT.h                      |  8 ++---
 Eigen/src/Core/DenseStorageBase.h             | 10 +++---
 Eigen/src/Core/Dot.h                          |  2 +-
 Eigen/src/Core/EigenBase.h                    |  6 ++--
 Eigen/src/Core/Flagged.h                      |  2 +-
 Eigen/src/Core/Matrix.h                       |  2 +-
 Eigen/src/Core/MatrixBase.h                   | 31 +++++++++----------
 Eigen/src/Core/PermutationMatrix.h            |  2 +-
 Eigen/src/Core/ProductBase.h                  | 14 ++++-----
 Eigen/src/Core/ReturnByValue.h                | 16 +++++-----
 Eigen/src/Core/SelfAdjointView.h              |  6 ++--
 Eigen/src/Core/SelfCwiseBinaryOp.h            |  8 ++---
 Eigen/src/Core/TriangularMatrix.h             |  2 +-
 Eigen/src/Core/products/CoeffBasedProduct.h   | 14 ++++-----
 Eigen/src/Core/util/BlasUtil.h                |  4 +--
 Eigen/src/Core/util/XprHelper.h               |  6 ++--
 Eigen/src/Eigen2Support/TriangularSolver.h    |  2 +-
 .../src/Eigenvalues/SelfAdjointEigenSolver.h  |  4 +--
 Eigen/src/Geometry/Homogeneous.h              |  8 ++---
 Eigen/src/Geometry/OrthoMethods.h             |  6 ++--
 Eigen/src/Householder/Householder.h           |  4 +--
 Eigen/src/LU/FullPivLU.h                      |  6 ++--
 Eigen/src/LU/Inverse.h                        |  4 +--
 Eigen/src/LU/PartialPivLU.h                   |  8 ++---
 Eigen/src/QR/ColPivHouseholderQR.h            |  8 ++---
 Eigen/src/QR/FullPivHouseholderQR.h           |  6 ++--
 Eigen/src/QR/HouseholderQR.h                  |  6 ++--
 Eigen/src/SVD/SVD.h                           |  4 +--
 Eigen/src/SVD/UpperBidiagonalization.h        |  4 +--
 Eigen/src/Sparse/SparseMatrixBase.h           |  4 +--
 Eigen/src/Sparse/SparseSelfAdjointView.h      |  4 +--
 Eigen/src/misc/Image.h                        |  2 +-
 Eigen/src/misc/Kernel.h                       |  2 +-
 Eigen/src/misc/Solve.h                        |  4 +--
 disabled/SkylineMatrix.h                      |  6 ++--
 test/lu.cpp                                   |  4 +--
 .../src/MatrixFunctions/MatrixExponential.h   |  4 +--
 .../src/MatrixFunctions/MatrixFunction.h      |  4 +--
 42 files changed, 123 insertions(+), 124 deletions(-)

diff --git a/Eigen/src/Array/Array.h b/Eigen/src/Array/Array.h
index 77d0c41ac..5a398d849 100644
--- a/Eigen/src/Array/Array.h
+++ b/Eigen/src/Array/Array.h
@@ -41,7 +41,7 @@ class Array
     EIGEN_DENSE_PUBLIC_INTERFACE(Array)
 
     enum { Options = _Options };
-    typedef typename Base::PlainMatrixType PlainMatrixType;
+    typedef typename Base::PlainObject PlainObject;
 
   protected:
     using Base::m_storage;
diff --git a/Eigen/src/Array/ArrayBase.h b/Eigen/src/Array/ArrayBase.h
index 21f6fefb1..97807e5fc 100644
--- a/Eigen/src/Array/ArrayBase.h
+++ b/Eigen/src/Array/ArrayBase.h
@@ -97,7 +97,7 @@ template<typename Derived> class ArrayBase
     /** \internal the plain matrix type corresponding to this expression. Note that is not necessarily
       * exactly the return type of eval(): in the case of plain matrices, the return type of eval() is a const
       * reference to a matrix, not a matrix! It is however guaranteed that the return type of eval() is either
-      * PlainMatrixType or const PlainMatrixType&.
+      * PlainObject or const PlainObject&.
       */
     typedef Array<typename ei_traits<Derived>::Scalar,
                 ei_traits<Derived>::RowsAtCompileTime,
@@ -105,7 +105,7 @@ template<typename Derived> class ArrayBase
                 AutoAlign | (ei_traits<Derived>::Flags&RowMajorBit ? RowMajor : ColMajor),
                 ei_traits<Derived>::MaxRowsAtCompileTime,
                 ei_traits<Derived>::MaxColsAtCompileTime
-          > PlainMatrixType;
+          > PlainObject;
 
 
     /** \internal Represents a matrix with all coefficients equal to one another*/
diff --git a/Eigen/src/Array/VectorwiseOp.h b/Eigen/src/Array/VectorwiseOp.h
index 697a07d32..06d999b14 100644
--- a/Eigen/src/Array/VectorwiseOp.h
+++ b/Eigen/src/Array/VectorwiseOp.h
@@ -462,7 +462,7 @@ template<typename ExpressionType, int Direction> class VectorwiseOp
 
     const Homogeneous<ExpressionType,Direction> homogeneous() const;
 
-    typedef typename ExpressionType::PlainMatrixType CrossReturnType;
+    typedef typename ExpressionType::PlainObject CrossReturnType;
     template<typename OtherDerived>
     const CrossReturnType cross(const MatrixBase<OtherDerived>& other) const;
 
diff --git a/Eigen/src/Cholesky/LDLT.h b/Eigen/src/Cholesky/LDLT.h
index b794b0c43..ceb818f19 100644
--- a/Eigen/src/Cholesky/LDLT.h
+++ b/Eigen/src/Cholesky/LDLT.h
@@ -319,7 +319,7 @@ bool LDLT<MatrixType>::solveInPlace(MatrixBase<Derived> &bAndX) const
   * \returns the Cholesky decomposition with full pivoting without square root of \c *this
   */
 template<typename Derived>
-inline const LDLT<typename MatrixBase<Derived>::PlainMatrixType>
+inline const LDLT<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::ldlt() const
 {
   return derived();
diff --git a/Eigen/src/Cholesky/LLT.h b/Eigen/src/Cholesky/LLT.h
index 8a149a316..474b82406 100644
--- a/Eigen/src/Cholesky/LLT.h
+++ b/Eigen/src/Cholesky/LLT.h
@@ -299,20 +299,20 @@ bool LLT<MatrixType,_UpLo>::solveInPlace(MatrixBase<Derived> &bAndX) const
   * \returns the LLT decomposition of \c *this
   */
 template<typename Derived>
-inline const LLT<typename MatrixBase<Derived>::PlainMatrixType>
+inline const LLT<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::llt() const
 {
-  return LLT<PlainMatrixType>(derived());
+  return LLT<PlainObject>(derived());
 }
 
 /** \cholesky_module
   * \returns the LLT decomposition of \c *this
   */
 template<typename MatrixType, unsigned int UpLo>
-inline const LLT<typename SelfAdjointView<MatrixType, UpLo>::PlainMatrixType, UpLo>
+inline const LLT<typename SelfAdjointView<MatrixType, UpLo>::PlainObject, UpLo>
 SelfAdjointView<MatrixType, UpLo>::llt() const
 {
-  return LLT<PlainMatrixType,UpLo>(m_matrix);
+  return LLT<PlainObject,UpLo>(m_matrix);
 }
 
 #endif // EIGEN_LLT_H
diff --git a/Eigen/src/Core/DenseStorageBase.h b/Eigen/src/Core/DenseStorageBase.h
index 530ddcd07..6245b8007 100644
--- a/Eigen/src/Core/DenseStorageBase.h
+++ b/Eigen/src/Core/DenseStorageBase.h
@@ -44,7 +44,7 @@ class DenseStorageBase : public _Base<Derived>
   public:
     enum { Options = _Options };
     typedef _Base<Derived> Base;
-    typedef typename Base::PlainMatrixType PlainMatrixType;
+    typedef typename Base::PlainObject PlainObject;
     typedef typename Base::Scalar Scalar;
     typedef typename Base::PacketScalar PacketScalar;
     using Base::RowsAtCompileTime;
@@ -544,7 +544,7 @@ struct ei_conservative_resize_like_impl
   {
     if (_this.rows() == rows && _this.cols() == cols) return;
     EIGEN_STATIC_ASSERT_DYNAMIC_SIZE(Derived)
-    typename Derived::PlainMatrixType tmp(rows,cols);
+    typename Derived::PlainObject tmp(rows,cols);
     const int common_rows = std::min(rows, _this.rows());
     const int common_cols = std::min(cols, _this.cols());
     tmp.block(0,0,common_rows,common_cols) = _this.block(0,0,common_rows,common_cols);
@@ -563,7 +563,7 @@ struct ei_conservative_resize_like_impl
     EIGEN_STATIC_ASSERT_DYNAMIC_SIZE(Derived)
     EIGEN_STATIC_ASSERT_DYNAMIC_SIZE(OtherDerived)
 
-    typename Derived::PlainMatrixType tmp(other);
+    typename Derived::PlainObject tmp(other);
     const int common_rows = std::min(tmp.rows(), _this.rows());
     const int common_cols = std::min(tmp.cols(), _this.cols());
     tmp.block(0,0,common_rows,common_cols) = _this.block(0,0,common_rows,common_cols);
@@ -577,7 +577,7 @@ struct ei_conservative_resize_like_impl<Derived,OtherDerived,true>
   static void run(DenseBase<Derived>& _this, int size)
   {
     if (_this.size() == size) return;
-    typename Derived::PlainMatrixType tmp(size);
+    typename Derived::PlainObject tmp(size);
     const int common_size = std::min<int>(_this.size(),size);
     tmp.segment(0,common_size) = _this.segment(0,common_size);
     _this.derived().swap(tmp);
@@ -588,7 +588,7 @@ struct ei_conservative_resize_like_impl<Derived,OtherDerived,true>
     if (_this.rows() == other.rows() && _this.cols() == other.cols()) return;
 
     // segment(...) will check whether Derived/OtherDerived are vectors!
-    typename Derived::PlainMatrixType tmp(other);
+    typename Derived::PlainObject tmp(other);
     const int common_size = std::min<int>(_this.size(),tmp.size());
     tmp.segment(0,common_size) = _this.segment(0,common_size);
     _this.derived().swap(tmp);
diff --git a/Eigen/src/Core/Dot.h b/Eigen/src/Core/Dot.h
index f0c520b1f..201bd23ca 100644
--- a/Eigen/src/Core/Dot.h
+++ b/Eigen/src/Core/Dot.h
@@ -299,7 +299,7 @@ inline typename NumTraits<typename ei_traits<Derived>::Scalar>::Real MatrixBase<
   * \sa norm(), normalize()
   */
 template<typename Derived>
-inline const typename MatrixBase<Derived>::PlainMatrixType
+inline const typename MatrixBase<Derived>::PlainObject
 MatrixBase<Derived>::normalized() const
 {
   typedef typename ei_nested<Derived>::type Nested;
diff --git a/Eigen/src/Core/EigenBase.h b/Eigen/src/Core/EigenBase.h
index 8b302b663..cf1ce4376 100644
--- a/Eigen/src/Core/EigenBase.h
+++ b/Eigen/src/Core/EigenBase.h
@@ -37,7 +37,7 @@
   */
 template<typename Derived> struct EigenBase
 {
-//   typedef typename ei_plain_matrix_type<Derived>::type PlainMatrixType;
+//   typedef typename ei_plain_matrix_type<Derived>::type PlainObject;
 
   /** \returns a reference to the derived object */
   Derived& derived() { return *static_cast<Derived*>(this); }
@@ -61,7 +61,7 @@ template<typename Derived> struct EigenBase
   {
     // This is the default implementation,
     // derived class can reimplement it in a more optimized way.
-    typename Dest::PlainMatrixType res(rows(),cols());
+    typename Dest::PlainObject res(rows(),cols());
     evalTo(res);
     dst += res;
   }
@@ -71,7 +71,7 @@ template<typename Derived> struct EigenBase
   {
     // This is the default implementation,
     // derived class can reimplement it in a more optimized way.
-    typename Dest::PlainMatrixType res(rows(),cols());
+    typename Dest::PlainObject res(rows(),cols());
     evalTo(res);
     dst -= res;
   }
diff --git a/Eigen/src/Core/Flagged.h b/Eigen/src/Core/Flagged.h
index 7f42a1e73..0044fe7cb 100644
--- a/Eigen/src/Core/Flagged.h
+++ b/Eigen/src/Core/Flagged.h
@@ -109,7 +109,7 @@ template<typename ExpressionType, unsigned int Added, unsigned int Removed> clas
     const ExpressionType& _expression() const { return m_matrix; }
 
     template<typename OtherDerived>
-    typename ExpressionType::PlainMatrixType solveTriangular(const MatrixBase<OtherDerived>& other) const;
+    typename ExpressionType::PlainObject solveTriangular(const MatrixBase<OtherDerived>& other) const;
 
     template<typename OtherDerived>
     void solveTriangularInPlace(const MatrixBase<OtherDerived>& other) const;
diff --git a/Eigen/src/Core/Matrix.h b/Eigen/src/Core/Matrix.h
index 1c43340a6..44a0ef7d1 100644
--- a/Eigen/src/Core/Matrix.h
+++ b/Eigen/src/Core/Matrix.h
@@ -139,7 +139,7 @@ class Matrix
 
     EIGEN_DENSE_PUBLIC_INTERFACE(Matrix)
 
-    typedef typename Base::PlainMatrixType PlainMatrixType;
+    typedef typename Base::PlainObject PlainObject;
 
     enum { NeedsToAlign = (!(Options&DontAlign))
                           && SizeAtCompileTime!=Dynamic && ((sizeof(Scalar)*SizeAtCompileTime)%16)==0 };
diff --git a/Eigen/src/Core/MatrixBase.h b/Eigen/src/Core/MatrixBase.h
index 122a2271b..9c62163ba 100644
--- a/Eigen/src/Core/MatrixBase.h
+++ b/Eigen/src/Core/MatrixBase.h
@@ -121,7 +121,7 @@ template<typename Derived> class MatrixBase
       *
       * This is not necessarily exactly the return type of eval(). In the case of plain matrices,
       * the return type of eval() is a const reference to a matrix, not a matrix! It is however guaranteed
-      * that the return type of eval() is either PlainMatrixType or const PlainMatrixType&.
+      * that the return type of eval() is either PlainObject or const PlainObject&.
       */
     typedef Matrix<typename ei_traits<Derived>::Scalar,
                 ei_traits<Derived>::RowsAtCompileTime,
@@ -129,8 +129,7 @@ template<typename Derived> class MatrixBase
                 AutoAlign | (ei_traits<Derived>::Flags&RowMajorBit ? RowMajor : ColMajor),
                 ei_traits<Derived>::MaxRowsAtCompileTime,
                 ei_traits<Derived>::MaxColsAtCompileTime
-          > PlainMatrixType;
-    // typedef typename ei_plain_matrix_type<Derived>::type PlainMatrixType;
+          > PlainObject;
 
 #ifndef EIGEN_PARSED_BY_DOXYGEN
     /** \internal Represents a matrix with all coefficients equal to one another*/
@@ -212,7 +211,7 @@ template<typename Derived> class MatrixBase
     RealScalar stableNorm() const;
     RealScalar blueNorm() const;
     RealScalar hypotNorm() const;
-    const PlainMatrixType normalized() const;
+    const PlainObject normalized() const;
     void normalize();
 
     const AdjointReturnType adjoint() const;
@@ -301,9 +300,9 @@ template<typename Derived> class MatrixBase
 
 /////////// LU module ///////////
 
-    const FullPivLU<PlainMatrixType> fullPivLu() const;
-    const PartialPivLU<PlainMatrixType> partialPivLu() const;
-    const PartialPivLU<PlainMatrixType> lu() const;
+    const FullPivLU<PlainObject> fullPivLu() const;
+    const PartialPivLU<PlainObject> partialPivLu() const;
+    const PartialPivLU<PlainObject> lu() const;
     const ei_inverse_impl<Derived> inverse() const;
     template<typename ResultType>
     void computeInverseAndDetWithCheck(
@@ -322,29 +321,29 @@ template<typename Derived> class MatrixBase
 
 /////////// Cholesky module ///////////
 
-    const LLT<PlainMatrixType>  llt() const;
-    const LDLT<PlainMatrixType> ldlt() const;
+    const LLT<PlainObject>  llt() const;
+    const LDLT<PlainObject> ldlt() const;
 
 /////////// QR module ///////////
 
-    const HouseholderQR<PlainMatrixType> householderQr() const;
-    const ColPivHouseholderQR<PlainMatrixType> colPivHouseholderQr() const;
-    const FullPivHouseholderQR<PlainMatrixType> fullPivHouseholderQr() const;
+    const HouseholderQR<PlainObject> householderQr() const;
+    const ColPivHouseholderQR<PlainObject> colPivHouseholderQr() const;
+    const FullPivHouseholderQR<PlainObject> fullPivHouseholderQr() const;
 
     EigenvaluesReturnType eigenvalues() const;
     RealScalar operatorNorm() const;
 
 /////////// SVD module ///////////
 
-    SVD<PlainMatrixType> svd() const;
+    SVD<PlainObject> svd() const;
 
 /////////// Geometry module ///////////
 
     template<typename OtherDerived>
-    PlainMatrixType cross(const MatrixBase<OtherDerived>& other) const;
+    PlainObject cross(const MatrixBase<OtherDerived>& other) const;
     template<typename OtherDerived>
-    PlainMatrixType cross3(const MatrixBase<OtherDerived>& other) const;
-    PlainMatrixType unitOrthogonal(void) const;
+    PlainObject cross3(const MatrixBase<OtherDerived>& other) const;
+    PlainObject unitOrthogonal(void) const;
     Matrix<Scalar,3,1> eulerAngles(int a0, int a1, int a2) const;
     const ScalarMultipleReturnType operator*(const UniformScaling<Scalar>& s) const;
     enum {
diff --git a/Eigen/src/Core/PermutationMatrix.h b/Eigen/src/Core/PermutationMatrix.h
index 2d97c9c38..fcd2e46cc 100644
--- a/Eigen/src/Core/PermutationMatrix.h
+++ b/Eigen/src/Core/PermutationMatrix.h
@@ -280,7 +280,7 @@ operator*(const PermutationMatrix<SizeAtCompileTime, MaxSizeAtCompileTime> &perm
 template<typename PermutationType, typename MatrixType, int Side>
 struct ei_traits<ei_permut_matrix_product_retval<PermutationType, MatrixType, Side> >
 {
-  typedef typename MatrixType::PlainMatrixType ReturnMatrixType;
+  typedef typename MatrixType::PlainObject ReturnType;
 };
 
 template<typename PermutationType, typename MatrixType, int Side>
diff --git a/Eigen/src/Core/ProductBase.h b/Eigen/src/Core/ProductBase.h
index 481e7c760..789aecfb6 100644
--- a/Eigen/src/Core/ProductBase.h
+++ b/Eigen/src/Core/ProductBase.h
@@ -88,7 +88,7 @@ class ProductBase : public MatrixBase<Derived>
 
   public:
 
-    typedef typename Base::PlainMatrixType PlainMatrixType;
+    typedef typename Base::PlainObject PlainObject;
 
     ProductBase(const Lhs& lhs, const Rhs& rhs)
       : m_lhs(lhs), m_rhs(rhs)
@@ -116,8 +116,8 @@ class ProductBase : public MatrixBase<Derived>
     const _LhsNested& lhs() const { return m_lhs; }
     const _RhsNested& rhs() const { return m_rhs; }
 
-    // Implicit convertion to the nested type (trigger the evaluation of the product)
-    operator const PlainMatrixType& () const
+    // Implicit conversion to the nested type (trigger the evaluation of the product)
+    operator const PlainObject& () const
     {
       m_result.resize(m_lhs.rows(), m_rhs.cols());
       this->evalTo(m_result);
@@ -139,7 +139,7 @@ class ProductBase : public MatrixBase<Derived>
     const LhsNested m_lhs;
     const RhsNested m_rhs;
 
-    mutable PlainMatrixType m_result;
+    mutable PlainObject m_result;
 
   private:
 
@@ -152,10 +152,10 @@ class ProductBase : public MatrixBase<Derived>
 
 // here we need to overload the nested rule for products
 // such that the nested type is a const reference to a plain matrix
-template<typename Lhs, typename Rhs, int Mode, int N, typename PlainMatrixType>
-struct ei_nested<GeneralProduct<Lhs,Rhs,Mode>, N, PlainMatrixType>
+template<typename Lhs, typename Rhs, int Mode, int N, typename PlainObject>
+struct ei_nested<GeneralProduct<Lhs,Rhs,Mode>, N, PlainObject>
 {
-  typedef PlainMatrixType const& type;
+  typedef PlainObject const& type;
 };
 
 template<typename NestedProduct>
diff --git a/Eigen/src/Core/ReturnByValue.h b/Eigen/src/Core/ReturnByValue.h
index 920269365..d375f0b5c 100644
--- a/Eigen/src/Core/ReturnByValue.h
+++ b/Eigen/src/Core/ReturnByValue.h
@@ -31,7 +31,7 @@
   */
 template<typename Derived>
 struct ei_traits<ReturnByValue<Derived> >
-  : public ei_traits<typename ei_traits<Derived>::ReturnMatrixType>
+  : public ei_traits<typename ei_traits<Derived>::ReturnType>
 {
   enum {
     // FIXME had to remove the DirectAccessBit for usage like
@@ -42,7 +42,7 @@ struct ei_traits<ReturnByValue<Derived> >
     // The fact that I had to do that shows that when doing xpr.block() with a non-direct-access xpr,
     // even if xpr has the EvalBeforeNestingBit, the block() doesn't use direct access on the evaluated
     // xpr.
-    Flags = (ei_traits<typename ei_traits<Derived>::ReturnMatrixType>::Flags
+    Flags = (ei_traits<typename ei_traits<Derived>::ReturnType>::Flags
              | EvalBeforeNestingBit) & ~DirectAccessBit
   };
 };
@@ -51,18 +51,18 @@ struct ei_traits<ReturnByValue<Derived> >
  * So the only way that nesting it in an expression can work, is by evaluating it into a plain matrix.
  * So ei_nested always gives the plain return matrix type.
  */
-template<typename Derived,int n,typename PlainMatrixType>
-struct ei_nested<ReturnByValue<Derived>, n, PlainMatrixType>
+template<typename Derived,int n,typename PlainObject>
+struct ei_nested<ReturnByValue<Derived>, n, PlainObject>
 {
-  typedef typename ei_traits<Derived>::ReturnMatrixType type;
+  typedef typename ei_traits<Derived>::ReturnType type;
 };
 
 template<typename Derived> class ReturnByValue
-  : public ei_traits<Derived>::ReturnMatrixType::template MakeBase<ReturnByValue<Derived> >::Type
+  : public ei_traits<Derived>::ReturnType::template MakeBase<ReturnByValue<Derived> >::Type
 {
   public:
-    typedef typename ei_traits<Derived>::ReturnMatrixType ReturnMatrixType;
-    typedef typename ReturnMatrixType::template MakeBase<ReturnByValue<Derived> >::Type Base;
+    typedef typename ei_traits<Derived>::ReturnType ReturnType;
+    typedef typename ReturnType::template MakeBase<ReturnByValue<Derived> >::Type Base;
     EIGEN_DENSE_PUBLIC_INTERFACE(ReturnByValue)
 
     template<typename Dest>
diff --git a/Eigen/src/Core/SelfAdjointView.h b/Eigen/src/Core/SelfAdjointView.h
index 6d01ee495..c3c5b17ff 100644
--- a/Eigen/src/Core/SelfAdjointView.h
+++ b/Eigen/src/Core/SelfAdjointView.h
@@ -68,7 +68,7 @@ template<typename MatrixType, unsigned int UpLo> class SelfAdjointView
     enum {
       Mode = ei_traits<SelfAdjointView>::Mode
     };
-    typedef typename MatrixType::PlainMatrixType PlainMatrixType;
+    typedef typename MatrixType::PlainObject PlainObject;
 
     inline SelfAdjointView(const MatrixType& matrix) : m_matrix(matrix)
     { ei_assert(ei_are_flags_consistent<Mode>::ret); }
@@ -146,8 +146,8 @@ template<typename MatrixType, unsigned int UpLo> class SelfAdjointView
 
 /////////// Cholesky module ///////////
 
-    const LLT<PlainMatrixType, UpLo> llt() const;
-    const LDLT<PlainMatrixType> ldlt() const;
+    const LLT<PlainObject, UpLo> llt() const;
+    const LDLT<PlainObject> ldlt() const;
 
   protected:
     const typename MatrixType::Nested m_matrix;
diff --git a/Eigen/src/Core/SelfCwiseBinaryOp.h b/Eigen/src/Core/SelfCwiseBinaryOp.h
index 7ae2e82a4..d2690b66b 100644
--- a/Eigen/src/Core/SelfCwiseBinaryOp.h
+++ b/Eigen/src/Core/SelfCwiseBinaryOp.h
@@ -124,8 +124,8 @@ template<typename Derived>
 inline Derived& DenseBase<Derived>::operator*=(const Scalar& other)
 {
   SelfCwiseBinaryOp<ei_scalar_product_op<Scalar>, Derived> tmp(derived());
-  typedef typename Derived::PlainMatrixType PlainMatrixType;
-  tmp = PlainMatrixType::Constant(rows(),cols(),other);
+  typedef typename Derived::PlainObject PlainObject;
+  tmp = PlainObject::Constant(rows(),cols(),other);
   return derived();
 }
 
@@ -133,8 +133,8 @@ template<typename Derived>
 inline Derived& DenseBase<Derived>::operator/=(const Scalar& other)
 {
   SelfCwiseBinaryOp<typename ei_meta_if<NumTraits<Scalar>::HasFloatingPoint,ei_scalar_product_op<Scalar>,ei_scalar_quotient_op<Scalar> >::ret, Derived> tmp(derived());
-  typedef typename Derived::PlainMatrixType PlainMatrixType;
-  tmp = PlainMatrixType::Constant(rows(),cols(), NumTraits<Scalar>::HasFloatingPoint ? Scalar(1)/other : other);
+  typedef typename Derived::PlainObject PlainObject;
+  tmp = PlainObject::Constant(rows(),cols(), NumTraits<Scalar>::HasFloatingPoint ? Scalar(1)/other : other);
   return derived();
 }
 
diff --git a/Eigen/src/Core/TriangularMatrix.h b/Eigen/src/Core/TriangularMatrix.h
index 859f10298..7d978b800 100644
--- a/Eigen/src/Core/TriangularMatrix.h
+++ b/Eigen/src/Core/TriangularMatrix.h
@@ -148,7 +148,7 @@ template<typename _MatrixType, unsigned int _Mode> class TriangularView
     typedef TriangularBase<TriangularView> Base;
     typedef typename ei_traits<TriangularView>::Scalar Scalar;
     typedef _MatrixType MatrixType;
-    typedef typename MatrixType::PlainMatrixType DenseMatrixType;
+    typedef typename MatrixType::PlainObject DenseMatrixType;
     typedef typename MatrixType::Nested MatrixTypeNested;
     typedef typename ei_cleantype<MatrixTypeNested>::type _MatrixTypeNested;
 
diff --git a/Eigen/src/Core/products/CoeffBasedProduct.h b/Eigen/src/Core/products/CoeffBasedProduct.h
index f030d59b5..3343b1875 100644
--- a/Eigen/src/Core/products/CoeffBasedProduct.h
+++ b/Eigen/src/Core/products/CoeffBasedProduct.h
@@ -109,7 +109,7 @@ class CoeffBasedProduct
 
     typedef MatrixBase<CoeffBasedProduct> Base;
     EIGEN_DENSE_PUBLIC_INTERFACE(CoeffBasedProduct)
-    typedef typename Base::PlainMatrixType PlainMatrixType;
+    typedef typename Base::PlainObject PlainObject;
 
   private:
 
@@ -181,8 +181,8 @@ class CoeffBasedProduct
       return res;
     }
 
-    // Implicit convertion to the nested type (trigger the evaluation of the product)
-    operator const PlainMatrixType& () const
+    // Implicit conversion to the nested type (trigger the evaluation of the product)
+    operator const PlainObject& () const
     {
       m_result.lazyAssign(*this);
       return m_result;
@@ -205,15 +205,15 @@ class CoeffBasedProduct
     const LhsNested m_lhs;
     const RhsNested m_rhs;
 
-    mutable PlainMatrixType m_result;
+    mutable PlainObject m_result;
 };
 
 // here we need to overload the nested rule for products
 // such that the nested type is a const reference to a plain matrix
-template<typename Lhs, typename Rhs, int N, typename PlainMatrixType>
-struct ei_nested<CoeffBasedProduct<Lhs,Rhs,EvalBeforeNestingBit|EvalBeforeAssigningBit>, N, PlainMatrixType>
+template<typename Lhs, typename Rhs, int N, typename PlainObject>
+struct ei_nested<CoeffBasedProduct<Lhs,Rhs,EvalBeforeNestingBit|EvalBeforeAssigningBit>, N, PlainObject>
 {
-  typedef PlainMatrixType const& type;
+  typedef PlainObject const& type;
 };
 
 /***************************************************************************
diff --git a/Eigen/src/Core/util/BlasUtil.h b/Eigen/src/Core/util/BlasUtil.h
index 3777464dc..2ca463d5d 100644
--- a/Eigen/src/Core/util/BlasUtil.h
+++ b/Eigen/src/Core/util/BlasUtil.h
@@ -166,7 +166,7 @@ template<typename XprType> struct ei_blas_traits
   };
   typedef typename ei_meta_if<int(ActualAccess)==HasDirectAccess,
     ExtractType,
-    typename _ExtractType::PlainMatrixType
+    typename _ExtractType::PlainObject
     >::ret DirectLinearAccessType;
   static inline ExtractType extract(const XprType& x) { return x; }
   static inline Scalar extractScalarFactor(const XprType&) { return Scalar(1); }
@@ -227,7 +227,7 @@ struct ei_blas_traits<Transpose<NestedXpr> >
   typedef Transpose<typename Base::_ExtractType> _ExtractType;
   typedef typename ei_meta_if<int(Base::ActualAccess)==HasDirectAccess,
     ExtractType,
-    typename ExtractType::PlainMatrixType
+    typename ExtractType::PlainObject
     >::ret DirectLinearAccessType;
   enum {
     IsTransposed = Base::IsTransposed ? 0 : 1
diff --git a/Eigen/src/Core/util/XprHelper.h b/Eigen/src/Core/util/XprHelper.h
index 4884557e5..a54ddd155 100644
--- a/Eigen/src/Core/util/XprHelper.h
+++ b/Eigen/src/Core/util/XprHelper.h
@@ -147,7 +147,7 @@ template<typename T, typename StorageType = typename ei_traits<T>::StorageType>
 template<typename T> struct ei_eval<T,Dense>
 {
   typedef typename ei_plain_matrix_type<T>::type type;
-//   typedef typename T::PlainMatrixType type;
+//   typedef typename T::PlainObject type;
 //   typedef T::Matrix<typename ei_traits<T>::Scalar,
 //                 ei_traits<T>::RowsAtCompileTime,
 //                 ei_traits<T>::ColsAtCompileTime,
@@ -256,7 +256,7 @@ struct ei_ref_selector
   * const Matrix3d&, because the internal logic of ei_nested determined that since a was already a matrix, there was no point
   * in copying it into another matrix.
   */
-template<typename T, int n=1, typename PlainMatrixType = typename ei_eval<T>::type> struct ei_nested
+template<typename T, int n=1, typename PlainObject = typename ei_eval<T>::type> struct ei_nested
 {
   enum {
     CostEval   = (n+1) * int(NumTraits<typename ei_traits<T>::Scalar>::ReadCost),
@@ -266,7 +266,7 @@ template<typename T, int n=1, typename PlainMatrixType = typename ei_eval<T>::ty
   typedef typename ei_meta_if<
     ( int(ei_traits<T>::Flags) & EvalBeforeNestingBit ) ||
     ( int(CostEval) <= int(CostNoEval) ),
-      PlainMatrixType,
+      PlainObject,
       typename ei_ref_selector<T>::type
   >::ret type;
 };
diff --git a/Eigen/src/Eigen2Support/TriangularSolver.h b/Eigen/src/Eigen2Support/TriangularSolver.h
index 94b92577e..833dd58d2 100644
--- a/Eigen/src/Eigen2Support/TriangularSolver.h
+++ b/Eigen/src/Eigen2Support/TriangularSolver.h
@@ -37,7 +37,7 @@ const unsigned int UnitLowerTriangular = UnitLower;
 
 template<typename ExpressionType, unsigned int Added, unsigned int Removed>
 template<typename OtherDerived>
-typename ExpressionType::PlainMatrixType
+typename ExpressionType::PlainObject
 Flagged<ExpressionType,Added,Removed>::solveTriangular(const MatrixBase<OtherDerived>& other) const
 {
   return m_matrix.template triangularView<Added>.solve(other.derived());
diff --git a/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h b/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h
index 960e9b417..e8e9bea97 100644
--- a/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h
+++ b/Eigen/src/Eigenvalues/SelfAdjointEigenSolver.h
@@ -276,7 +276,7 @@ inline Matrix<typename NumTraits<typename ei_traits<Derived>::Scalar>::Real, ei_
 MatrixBase<Derived>::eigenvalues() const
 {
   ei_assert(Flags&SelfAdjoint);
-  return SelfAdjointEigenSolver<typename Derived::PlainMatrixType>(eval(),false).eigenvalues();
+  return SelfAdjointEigenSolver<typename Derived::PlainObject>(eval(),false).eigenvalues();
 }
 
 template<typename Derived, bool IsSelfAdjoint>
@@ -296,7 +296,7 @@ template<typename Derived> struct ei_operatorNorm_selector<Derived, false>
   static inline typename NumTraits<typename ei_traits<Derived>::Scalar>::Real
   operatorNorm(const MatrixBase<Derived>& m)
   {
-    typename Derived::PlainMatrixType m_eval(m);
+    typename Derived::PlainObject m_eval(m);
     // FIXME if it is really guaranteed that the eigenvalues are already sorted,
     // then we don't need to compute a maxCoeff() here, comparing the 1st and last ones is enough.
     return ei_sqrt(
diff --git a/Eigen/src/Geometry/Homogeneous.h b/Eigen/src/Geometry/Homogeneous.h
index 76ca66c57..2b8b9cf8e 100644
--- a/Eigen/src/Geometry/Homogeneous.h
+++ b/Eigen/src/Geometry/Homogeneous.h
@@ -213,9 +213,9 @@ struct ei_traits<ei_homogeneous_left_product_impl<Homogeneous<MatrixType,Vertica
   typedef Matrix<typename ei_traits<MatrixType>::Scalar,
                  Lhs::RowsAtCompileTime,
                  MatrixType::ColsAtCompileTime,
-                 MatrixType::PlainMatrixType::Options,
+                 MatrixType::PlainObject::Options,
                  Lhs::MaxRowsAtCompileTime,
-                 MatrixType::MaxColsAtCompileTime> ReturnMatrixType;
+                 MatrixType::MaxColsAtCompileTime> ReturnType;
 };
 
 template<typename MatrixType,typename Lhs>
@@ -251,9 +251,9 @@ struct ei_traits<ei_homogeneous_right_product_impl<Homogeneous<MatrixType,Horizo
   typedef Matrix<typename ei_traits<MatrixType>::Scalar,
                  MatrixType::RowsAtCompileTime,
                  Rhs::ColsAtCompileTime,
-                 MatrixType::PlainMatrixType::Options,
+                 MatrixType::PlainObject::Options,
                  MatrixType::MaxRowsAtCompileTime,
-                 Rhs::MaxColsAtCompileTime> ReturnMatrixType;
+                 Rhs::MaxColsAtCompileTime> ReturnType;
 };
 
 template<typename MatrixType,typename Rhs>
diff --git a/Eigen/src/Geometry/OrthoMethods.h b/Eigen/src/Geometry/OrthoMethods.h
index c10b6abf4..265507eb9 100644
--- a/Eigen/src/Geometry/OrthoMethods.h
+++ b/Eigen/src/Geometry/OrthoMethods.h
@@ -35,7 +35,7 @@
   */
 template<typename Derived>
 template<typename OtherDerived>
-inline typename MatrixBase<Derived>::PlainMatrixType
+inline typename MatrixBase<Derived>::PlainObject
 MatrixBase<Derived>::cross(const MatrixBase<OtherDerived>& other) const
 {
   EIGEN_STATIC_ASSERT_VECTOR_SPECIFIC_SIZE(Derived,3)
@@ -79,7 +79,7 @@ struct ei_cross3_impl {
   */
 template<typename Derived>
 template<typename OtherDerived>
-inline typename MatrixBase<Derived>::PlainMatrixType
+inline typename MatrixBase<Derived>::PlainObject
 MatrixBase<Derived>::cross3(const MatrixBase<OtherDerived>& other) const
 {
   EIGEN_STATIC_ASSERT_VECTOR_SPECIFIC_SIZE(Derived,4)
@@ -210,7 +210,7 @@ struct ei_unitOrthogonal_selector<Derived,2>
   * \sa cross()
   */
 template<typename Derived>
-typename MatrixBase<Derived>::PlainMatrixType
+typename MatrixBase<Derived>::PlainObject
 MatrixBase<Derived>::unitOrthogonal() const
 {
   EIGEN_STATIC_ASSERT_VECTOR_ONLY(Derived)
diff --git a/Eigen/src/Householder/Householder.h b/Eigen/src/Householder/Householder.h
index d86e287fa..9d1383543 100644
--- a/Eigen/src/Householder/Householder.h
+++ b/Eigen/src/Householder/Householder.h
@@ -99,7 +99,7 @@ void MatrixBase<Derived>::applyHouseholderOnTheLeft(
   const Scalar& tau,
   Scalar* workspace)
 {
-  Map<Matrix<Scalar, 1, Base::ColsAtCompileTime, PlainMatrixType::Options, 1, Base::MaxColsAtCompileTime> > tmp(workspace,cols());
+  Map<Matrix<Scalar, 1, Base::ColsAtCompileTime, PlainObject::Options, 1, Base::MaxColsAtCompileTime> > tmp(workspace,cols());
   Block<Derived, EssentialPart::SizeAtCompileTime, Derived::ColsAtCompileTime> bottom(derived(), 1, 0, rows()-1, cols());
   tmp.noalias() = essential.adjoint() * bottom;
   tmp += this->row(0);
@@ -114,7 +114,7 @@ void MatrixBase<Derived>::applyHouseholderOnTheRight(
   const Scalar& tau,
   Scalar* workspace)
 {
-  Map<Matrix<Scalar, Base::RowsAtCompileTime, 1, PlainMatrixType::Options, Base::MaxRowsAtCompileTime, 1> > tmp(workspace,rows());
+  Map<Matrix<Scalar, Base::RowsAtCompileTime, 1, PlainObject::Options, Base::MaxRowsAtCompileTime, 1> > tmp(workspace,rows());
   Block<Derived, Derived::RowsAtCompileTime, EssentialPart::SizeAtCompileTime> right(derived(), 0, 1, rows(), cols()-1);
   tmp.noalias() = right * essential.conjugate();
   tmp += this->col(0);
diff --git a/Eigen/src/LU/FullPivLU.h b/Eigen/src/LU/FullPivLU.h
index 72e878223..1129293d5 100644
--- a/Eigen/src/LU/FullPivLU.h
+++ b/Eigen/src/LU/FullPivLU.h
@@ -630,7 +630,7 @@ struct ei_solve_retval<FullPivLU<_MatrixType>, Rhs>
       return;
     }
 
-    typename Rhs::PlainMatrixType c(rhs().rows(), rhs().cols());
+    typename Rhs::PlainObject c(rhs().rows(), rhs().cols());
 
     // Step 1
     c = dec().permutationP() * rhs();
@@ -670,10 +670,10 @@ struct ei_solve_retval<FullPivLU<_MatrixType>, Rhs>
   * \sa class FullPivLU
   */
 template<typename Derived>
-inline const FullPivLU<typename MatrixBase<Derived>::PlainMatrixType>
+inline const FullPivLU<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::fullPivLu() const
 {
-  return FullPivLU<PlainMatrixType>(eval());
+  return FullPivLU<PlainObject>(eval());
 }
 
 #endif // EIGEN_LU_H
diff --git a/Eigen/src/LU/Inverse.h b/Eigen/src/LU/Inverse.h
index 36392c8d8..e20da70d6 100644
--- a/Eigen/src/LU/Inverse.h
+++ b/Eigen/src/LU/Inverse.h
@@ -238,7 +238,7 @@ struct ei_compute_inverse_and_det_with_check<MatrixType, ResultType, 4>
 template<typename MatrixType>
 struct ei_traits<ei_inverse_impl<MatrixType> >
 {
-  typedef typename MatrixType::PlainMatrixType ReturnMatrixType;
+  typedef typename MatrixType::PlainObject ReturnType;
 };
 
 template<typename MatrixType>
@@ -327,7 +327,7 @@ inline void MatrixBase<Derived>::computeInverseAndDetWithCheck(
   typedef typename ei_meta_if<
     RowsAtCompileTime == 2,
     typename ei_cleantype<typename ei_nested<Derived, 2>::type>::type,
-    PlainMatrixType
+    PlainObject
   >::ret MatrixType;
   ei_compute_inverse_and_det_with_check<MatrixType, ResultType>::run
     (derived(), absDeterminantThreshold, inverse, determinant, invertible);
diff --git a/Eigen/src/LU/PartialPivLU.h b/Eigen/src/LU/PartialPivLU.h
index 809e4aad6..ed2354d78 100644
--- a/Eigen/src/LU/PartialPivLU.h
+++ b/Eigen/src/LU/PartialPivLU.h
@@ -442,10 +442,10 @@ struct ei_solve_retval<PartialPivLU<_MatrixType>, Rhs>
   * \sa class PartialPivLU
   */
 template<typename Derived>
-inline const PartialPivLU<typename MatrixBase<Derived>::PlainMatrixType>
+inline const PartialPivLU<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::partialPivLu() const
 {
-  return PartialPivLU<PlainMatrixType>(eval());
+  return PartialPivLU<PlainObject>(eval());
 }
 
 /** \lu_module
@@ -457,10 +457,10 @@ MatrixBase<Derived>::partialPivLu() const
   * \sa class PartialPivLU
   */
 template<typename Derived>
-inline const PartialPivLU<typename MatrixBase<Derived>::PlainMatrixType>
+inline const PartialPivLU<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::lu() const
 {
-  return PartialPivLU<PlainMatrixType>(eval());
+  return PartialPivLU<PlainObject>(eval());
 }
 
 #endif // EIGEN_PARTIALLU_H
diff --git a/Eigen/src/QR/ColPivHouseholderQR.h b/Eigen/src/QR/ColPivHouseholderQR.h
index bf28605dd..1219f1918 100644
--- a/Eigen/src/QR/ColPivHouseholderQR.h
+++ b/Eigen/src/QR/ColPivHouseholderQR.h
@@ -441,7 +441,7 @@ struct ei_solve_retval<ColPivHouseholderQR<_MatrixType>, Rhs>
       return;
     }
 
-    typename Rhs::PlainMatrixType c(rhs());
+    typename Rhs::PlainObject c(rhs());
 
     // Note that the matrix Q = H_0^* H_1^*... so its inverse is Q^* = (H_0 H_1 ...)^T
     c.applyOnTheLeft(householderSequence(
@@ -458,7 +458,7 @@ struct ei_solve_retval<ColPivHouseholderQR<_MatrixType>, Rhs>
        .solveInPlace(c.corner(TopLeft, nonzero_pivots, c.cols()));
 
 
-    typename Rhs::PlainMatrixType d(c);
+    typename Rhs::PlainObject d(c);
     d.corner(TopLeft, nonzero_pivots, c.cols())
       = dec().matrixQR()
        .corner(TopLeft, nonzero_pivots, nonzero_pivots)
@@ -486,10 +486,10 @@ typename ColPivHouseholderQR<MatrixType>::HouseholderSequenceType ColPivHousehol
   * \sa class ColPivHouseholderQR
   */
 template<typename Derived>
-const ColPivHouseholderQR<typename MatrixBase<Derived>::PlainMatrixType>
+const ColPivHouseholderQR<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::colPivHouseholderQr() const
 {
-  return ColPivHouseholderQR<PlainMatrixType>(eval());
+  return ColPivHouseholderQR<PlainObject>(eval());
 }
 
 
diff --git a/Eigen/src/QR/FullPivHouseholderQR.h b/Eigen/src/QR/FullPivHouseholderQR.h
index 1ec60aeaf..07be47f47 100644
--- a/Eigen/src/QR/FullPivHouseholderQR.h
+++ b/Eigen/src/QR/FullPivHouseholderQR.h
@@ -352,7 +352,7 @@ struct ei_solve_retval<FullPivHouseholderQR<_MatrixType>, Rhs>
       return;
     }
 
-    typename Rhs::PlainMatrixType c(rhs());
+    typename Rhs::PlainObject c(rhs());
 
     Matrix<Scalar,1,Rhs::ColsAtCompileTime> temp(rhs().cols());
     for (int k = 0; k < dec().rank(); ++k)
@@ -413,10 +413,10 @@ typename FullPivHouseholderQR<MatrixType>::MatrixQType FullPivHouseholderQR<Matr
   * \sa class FullPivHouseholderQR
   */
 template<typename Derived>
-const FullPivHouseholderQR<typename MatrixBase<Derived>::PlainMatrixType>
+const FullPivHouseholderQR<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::fullPivHouseholderQr() const
 {
-  return FullPivHouseholderQR<PlainMatrixType>(eval());
+  return FullPivHouseholderQR<PlainObject>(eval());
 }
 
 #endif // EIGEN_FULLPIVOTINGHOUSEHOLDERQR_H
diff --git a/Eigen/src/QR/HouseholderQR.h b/Eigen/src/QR/HouseholderQR.h
index b6b07ea63..4709e4b77 100644
--- a/Eigen/src/QR/HouseholderQR.h
+++ b/Eigen/src/QR/HouseholderQR.h
@@ -221,7 +221,7 @@ struct ei_solve_retval<HouseholderQR<_MatrixType>, Rhs>
     const int rank = std::min(rows, cols);
     ei_assert(rhs().rows() == rows);
 
-    typename Rhs::PlainMatrixType c(rhs());
+    typename Rhs::PlainObject c(rhs());
 
     // Note that the matrix Q = H_0^* H_1^*... so its inverse is Q^* = (H_0 H_1 ...)^T
     c.applyOnTheLeft(householderSequence(
@@ -246,10 +246,10 @@ struct ei_solve_retval<HouseholderQR<_MatrixType>, Rhs>
   * \sa class HouseholderQR
   */
 template<typename Derived>
-const HouseholderQR<typename MatrixBase<Derived>::PlainMatrixType>
+const HouseholderQR<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::householderQr() const
 {
-  return HouseholderQR<PlainMatrixType>(eval());
+  return HouseholderQR<PlainObject>(eval());
 }
 
 
diff --git a/Eigen/src/SVD/SVD.h b/Eigen/src/SVD/SVD.h
index c308ff3ee..fa3b82ce2 100644
--- a/Eigen/src/SVD/SVD.h
+++ b/Eigen/src/SVD/SVD.h
@@ -555,10 +555,10 @@ void SVD<MatrixType>::computeScalingRotation(ScalingType *scaling, RotationType
   * \returns the SVD decomposition of \c *this
   */
 template<typename Derived>
-inline SVD<typename MatrixBase<Derived>::PlainMatrixType>
+inline SVD<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::svd() const
 {
-  return SVD<PlainMatrixType>(derived());
+  return SVD<PlainObject>(derived());
 }
 
 #endif // EIGEN_SVD_H
diff --git a/Eigen/src/SVD/UpperBidiagonalization.h b/Eigen/src/SVD/UpperBidiagonalization.h
index a2cb44733..0a63b4265 100644
--- a/Eigen/src/SVD/UpperBidiagonalization.h
+++ b/Eigen/src/SVD/UpperBidiagonalization.h
@@ -141,10 +141,10 @@ UpperBidiagonalization<_MatrixType>& UpperBidiagonalization<_MatrixType>::comput
   * \sa class Bidiagonalization
   */
 template<typename Derived>
-const UpperBidiagonalization<typename MatrixBase<Derived>::PlainMatrixType>
+const UpperBidiagonalization<typename MatrixBase<Derived>::PlainObject>
 MatrixBase<Derived>::bidiagonalization() const
 {
-  return UpperBidiagonalization<PlainMatrixType>(eval());
+  return UpperBidiagonalization<PlainObject>(eval());
 }
 #endif
 
diff --git a/Eigen/src/Sparse/SparseMatrixBase.h b/Eigen/src/Sparse/SparseMatrixBase.h
index 7bf4ef836..cf1a5d7bf 100644
--- a/Eigen/src/Sparse/SparseMatrixBase.h
+++ b/Eigen/src/Sparse/SparseMatrixBase.h
@@ -109,7 +109,7 @@ template<typename Derived> class SparseMatrixBase : public EigenBase<Derived>
                         Transpose<Derived>
                      >::ret AdjointReturnType;
 
-    typedef SparseMatrix<Scalar, Flags&RowMajorBit ? RowMajor : ColMajor> PlainMatrixType;
+    typedef SparseMatrix<Scalar, Flags&RowMajorBit ? RowMajor : ColMajor> PlainObject;
 
     #define EIGEN_CURRENT_STORAGE_BASE_CLASS Eigen::SparseMatrixBase
     #include "../plugins/CommonCwiseUnaryOps.h"
@@ -396,7 +396,7 @@ template<typename Derived> class SparseMatrixBase : public EigenBase<Derived>
     template<typename OtherDerived> Scalar dot(const SparseMatrixBase<OtherDerived>& other) const;
     RealScalar squaredNorm() const;
     RealScalar norm()  const;
-//     const PlainMatrixType normalized() const;
+//     const PlainObject normalized() const;
 //     void normalize();
 
     Transpose<Derived> transpose() { return derived(); }
diff --git a/Eigen/src/Sparse/SparseSelfAdjointView.h b/Eigen/src/Sparse/SparseSelfAdjointView.h
index 039e5c725..f3d4fbcbd 100644
--- a/Eigen/src/Sparse/SparseSelfAdjointView.h
+++ b/Eigen/src/Sparse/SparseSelfAdjointView.h
@@ -93,8 +93,8 @@ template<typename MatrixType, unsigned int UpLo> class SparseSelfAdjointView
     template<typename DerivedU>
     SparseSelfAdjointView& rankUpdate(const MatrixBase<DerivedU>& u, Scalar alpha = Scalar(1));
 
-    // const SparseLLT<PlainMatrixType, UpLo> llt() const;
-    // const SparseLDLT<PlainMatrixType, UpLo> ldlt() const;
+    // const SparseLLT<PlainObject, UpLo> llt() const;
+    // const SparseLDLT<PlainObject, UpLo> ldlt() const;
 
   protected:
 
diff --git a/Eigen/src/misc/Image.h b/Eigen/src/misc/Image.h
index 2f39d6b9d..1d63d8143 100644
--- a/Eigen/src/misc/Image.h
+++ b/Eigen/src/misc/Image.h
@@ -40,7 +40,7 @@ struct ei_traits<ei_image_retval_base<DecompositionType> >
     MatrixType::Options,
     MatrixType::MaxRowsAtCompileTime, // the image matrix will consist of columns from the original matrix,
     MatrixType::MaxColsAtCompileTime  // so it has the same number of rows and at most as many columns.
-  > ReturnMatrixType;
+  > ReturnType;
 };
 
 template<typename _DecompositionType> struct ei_image_retval_base
diff --git a/Eigen/src/misc/Kernel.h b/Eigen/src/misc/Kernel.h
index 908c408e9..497b42eab 100644
--- a/Eigen/src/misc/Kernel.h
+++ b/Eigen/src/misc/Kernel.h
@@ -42,7 +42,7 @@ struct ei_traits<ei_kernel_retval_base<DecompositionType> >
     MatrixType::MaxColsAtCompileTime, // see explanation for 2nd template parameter
     MatrixType::MaxColsAtCompileTime // the kernel is a subspace of the domain space,
                                      // whose dimension is the number of columns of the original matrix
-  > ReturnMatrixType;
+  > ReturnType;
 };
 
 template<typename _DecompositionType> struct ei_kernel_retval_base
diff --git a/Eigen/src/misc/Solve.h b/Eigen/src/misc/Solve.h
index 4ab0775fc..028716aa2 100644
--- a/Eigen/src/misc/Solve.h
+++ b/Eigen/src/misc/Solve.h
@@ -35,9 +35,9 @@ struct ei_traits<ei_solve_retval_base<DecompositionType, Rhs> >
   typedef Matrix<typename Rhs::Scalar,
                  MatrixType::ColsAtCompileTime,
                  Rhs::ColsAtCompileTime,
-                 Rhs::PlainMatrixType::Options,
+                 Rhs::PlainObject::Options,
                  MatrixType::MaxColsAtCompileTime,
-                 Rhs::MaxColsAtCompileTime> ReturnMatrixType;
+                 Rhs::MaxColsAtCompileTime> ReturnType;
 };
 
 template<typename _DecompositionType, typename Rhs> struct ei_solve_retval_base
diff --git a/disabled/SkylineMatrix.h b/disabled/SkylineMatrix.h
index 03d17dac2..640f676bd 100644
--- a/disabled/SkylineMatrix.h
+++ b/disabled/SkylineMatrix.h
@@ -62,7 +62,7 @@ class BandMatrix : public MultiplierBase<BandMatrix<_Scalar,Supers,Subs,Options>
       MaxColsAtCompileTime = ei_traits<BandMatrix>::MaxColsAtCompileTime
     };
     typedef typename ei_traits<BandMatrix>::Scalar Scalar;
-    typedef Matrix<Scalar,RowsAtCompileTime,ColsAtCompileTime> PlainMatrixType;
+    typedef Matrix<Scalar,RowsAtCompileTime,ColsAtCompileTime> PlainObject;
     
   protected:
     enum {
@@ -125,9 +125,9 @@ class BandMatrix : public MultiplierBase<BandMatrix<_Scalar,Supers,Subs,Options>
 //     inline VectorBlock<DataType,Size> subDiagonal()
 //     { return VectorBlock<DataType,Size>(m_data,0,m_size.value()); }
 
-    PlainMatrixType toDense() const
+    PlainObject toDense() const
     {
-      PlainMatrixType res(rows(),cols());
+      PlainObject res(rows(),cols());
       res.setZero();
       res.diagonal() = diagonal();
       for (int i=1; i<=supers();++i)
diff --git a/test/lu.cpp b/test/lu.cpp
index 45308ff82..568db8230 100644
--- a/test/lu.cpp
+++ b/test/lu.cpp
@@ -51,8 +51,8 @@ template<typename MatrixType> void lu_non_invertible()
     cols2 = cols = MatrixType::ColsAtCompileTime;
   }
 
-  typedef typename ei_kernel_retval_base<FullPivLU<MatrixType> >::ReturnMatrixType KernelMatrixType;
-  typedef typename ei_image_retval_base<FullPivLU<MatrixType> >::ReturnMatrixType ImageMatrixType;
+  typedef typename ei_kernel_retval_base<FullPivLU<MatrixType> >::ReturnType KernelMatrixType;
+  typedef typename ei_image_retval_base<FullPivLU<MatrixType> >::ReturnType ImageMatrixType;
   typedef Matrix<typename MatrixType::Scalar, Dynamic, Dynamic> DynamicMatrixType;
   typedef Matrix<typename MatrixType::Scalar, MatrixType::ColsAtCompileTime, MatrixType::ColsAtCompileTime>
           CMatrixType;
diff --git a/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h b/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h
index 39c23cdc5..2c761e648 100644
--- a/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h
+++ b/unsupported/Eigen/src/MatrixFunctions/MatrixExponential.h
@@ -313,7 +313,7 @@ template<typename Derived> struct MatrixExponentialReturnValue
     inline void evalTo(ResultType& result) const
     {
       const typename ei_eval<Derived>::type srcEvaluated = m_src.eval();
-      MatrixExponential<typename Derived::PlainMatrixType> me(srcEvaluated);
+      MatrixExponential<typename Derived::PlainObject> me(srcEvaluated);
       me.compute(result);
     }
 
@@ -327,7 +327,7 @@ template<typename Derived> struct MatrixExponentialReturnValue
 template<typename Derived>
 struct ei_traits<MatrixExponentialReturnValue<Derived> >
 {
-  typedef typename Derived::PlainMatrixType ReturnMatrixType;
+  typedef typename Derived::PlainObject ReturnType;
 };
 
 /** \ingroup MatrixFunctions_Module
diff --git a/unsupported/Eigen/src/MatrixFunctions/MatrixFunction.h b/unsupported/Eigen/src/MatrixFunctions/MatrixFunction.h
index d63bcbce9..12322a256 100644
--- a/unsupported/Eigen/src/MatrixFunctions/MatrixFunction.h
+++ b/unsupported/Eigen/src/MatrixFunctions/MatrixFunction.h
@@ -516,7 +516,7 @@ template<typename Derived> class MatrixFunctionReturnValue
     inline void evalTo(ResultType& result) const
     {
       const typename ei_eval<Derived>::type Aevaluated = m_A.eval();
-      MatrixFunction<typename Derived::PlainMatrixType> mf(Aevaluated, m_f);
+      MatrixFunction<typename Derived::PlainObject> mf(Aevaluated, m_f);
       mf.compute(result);
     }
 
@@ -531,7 +531,7 @@ template<typename Derived> class MatrixFunctionReturnValue
 template<typename Derived>
 struct ei_traits<MatrixFunctionReturnValue<Derived> >
 {
-  typedef typename Derived::PlainMatrixType ReturnMatrixType;
+  typedef typename Derived::PlainObject ReturnType;
 };