Introduce generic Flagged xpr, remove already Lazy.h and Temporary.h

Rename DefaultLostFlagMask --> HerediraryBits

Eigen/src/Core/Flagged.h

@@ -0,0 +1,106 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra. Eigen itself is part of the KDE project.
+//
+// Copyright (C) 2008 Benoit Jacob <jacob@math.jussieu.fr>
+//
+// Eigen is free software; you can redistribute it and/or
+// modify it under the terms of the GNU Lesser General Public
+// License as published by the Free Software Foundation; either
+// version 3 of the License, or (at your option) any later version.
+//
+// Alternatively, you can redistribute it and/or
+// modify it under the terms of the GNU General Public License as
+// published by the Free Software Foundation; either version 2 of
+// the License, or (at your option) any later version.
+//
+// Eigen is distributed in the hope that it will be useful, but WITHOUT ANY
+// WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+// FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License or the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU Lesser General Public
+// License and a copy of the GNU General Public License along with
+// Eigen. If not, see <http://www.gnu.org/licenses/>.
+
+#ifndef EIGEN_FLAGGED_H
+#define EIGEN_FLAGGED_H
+
+/** \class Flagged
+  *
+  * \brief Expression with modified flags
+  *
+  * \param ExpressionType the type of the object of which we are modifying the flags
+  * \param Added the flags added to the expression
+  * \param Removed the flags removed from the expression (has priority over Added).
+  *
+  * This class represents an expression whose flags have been modified
+  * It is the return type of MatrixBase::flagged()
+  * and most of the time this is the only way it is used.
+  *
+  * \sa MatrixBase::flagged()
+  */
+template<typename ExpressionType, unsigned int Added, unsigned int Removed>
+struct ei_traits<Flagged<ExpressionType, Added, Removed> >
+{
+  typedef typename ExpressionType::Scalar Scalar;
+  enum {
+    RowsAtCompileTime = ExpressionType::RowsAtCompileTime,
+    ColsAtCompileTime = ExpressionType::ColsAtCompileTime,
+    MaxRowsAtCompileTime = ExpressionType::MaxRowsAtCompileTime,
+    MaxColsAtCompileTime = ExpressionType::MaxColsAtCompileTime,
+    Flags = (ExpressionType::Flags | Added) & ~Removed,
+    CoeffReadCost = ExpressionType::CoeffReadCost
+  };
+};
+
+template<typename ExpressionType, unsigned int Added, unsigned int Removed> class Flagged
+  : public MatrixBase<Flagged<ExpressionType, Added, Removed> >
+{
+  public:
+
+    EIGEN_GENERIC_PUBLIC_INTERFACE(Flagged)
+
+    inline Flagged(const ExpressionType& matrix) : m_expression(matrix) {}
+
+  private:
+
+    inline int _rows() const { return m_expression.rows(); }
+    inline int _cols() const { return m_expression.cols(); }
+
+    inline const Scalar _coeff(int row, int col) const
+    {
+      return m_expression.coeff(row, col);
+    }
+
+    inline Scalar& _coeffRef(int row, int col)
+    {
+      return m_expression.const_cast_derived().coeffRef(row, col);
+    }
+
+    template<int LoadMode>
+    inline const PacketScalar _packetCoeff(int row, int col) const
+    {
+      return m_expression.template packetCoeff<LoadMode>(row, col);
+    }
+
+    template<int LoadMode>
+    inline void _writePacketCoeff(int row, int col, const PacketScalar& x)
+    {
+      m_expression.const_cast_derived().template writePacketCoeff<LoadMode>(row, col, x);
+    }
+
+  protected:
+    const ExpressionType m_expression;
+};
+
+/** \returns an expression of the temporary version of *this.
+  */
+template<typename Derived>
+template<unsigned int Added, unsigned int Removed>
+inline const Flagged<Derived, Added, Removed>
+MatrixBase<Derived>::flagged() const
+{
+  return Flagged<Derived, Added, Removed>(derived());
+}
+
+#endif // EIGEN_FLAGGED_H