Another big refactoring change:

* add a new Eigen2Support module including Cwise, Flagged, and some other deprecated stuff
* add a few cwiseXxx functions
* adapt a few modules to use cwiseXxx instead of the .cwise() prefix

Eigen/src/Core/Cwise.h

@@ -1,186 +0,0 @@
-// This file is part of Eigen, a lightweight C++ template library
-// for linear algebra.
-//
-// Copyright (C) 2008 Gael Guennebaud <g.gael@free.fr>
-// Copyright (C) 2008 Benoit Jacob <jacob.benoit.1@gmail.com>
-//
-// 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_CWISE_H
-#define EIGEN_CWISE_H
-
-/** \internal
-  * convenient macro to defined the return type of a cwise binary operation */
-#define EIGEN_CWISE_BINOP_RETURN_TYPE(OP) \
-    CwiseBinaryOp<OP<typename ei_traits<ExpressionType>::Scalar>, ExpressionType, OtherDerived>
-
-#define EIGEN_CWISE_PRODUCT_RETURN_TYPE \
-    CwiseBinaryOp< \
-      ei_scalar_product_op< \
-        typename ei_scalar_product_traits< \
-          typename ei_traits<ExpressionType>::Scalar, \
-          typename ei_traits<OtherDerived>::Scalar \
-        >::ReturnType \
-      >, \
-      ExpressionType, \
-      OtherDerived \
-    >
-
-/** \internal
-  * convenient macro to defined the return type of a cwise unary operation */
-#define EIGEN_CWISE_UNOP_RETURN_TYPE(OP) \
-    CwiseUnaryOp<OP<typename ei_traits<ExpressionType>::Scalar>, ExpressionType>
-
-/** \internal
-  * convenient macro to defined the return type of a cwise comparison to a scalar */
-#define EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(OP) \
-    CwiseBinaryOp<OP<typename ei_traits<ExpressionType>::Scalar>, ExpressionType, \
-        NestByValue<typename ExpressionType::ConstantReturnType> >
-
-/** \class Cwise
-  *
-  * \brief Pseudo expression providing additional coefficient-wise operations
-  *
-  * \param ExpressionType the type of the object on which to do coefficient-wise operations
-  *
-  * This class represents an expression with additional coefficient-wise features.
-  * It is the return type of MatrixBase::cwise()
-  * and most of the time this is the only way it is used.
-  *
-  * Note that some methods are defined in the \ref Array_Module array module.
-  *
-  * Example: \include MatrixBase_cwise_const.cpp
-  * Output: \verbinclude MatrixBase_cwise_const.out
-  *
-  * \sa MatrixBase::cwise() const, MatrixBase::cwise()
-  */
-template<typename ExpressionType, template<typename> class StorageBase> class Cwise
-{
-  public:
-
-    typedef typename ei_traits<ExpressionType>::Scalar Scalar;
-    typedef typename ei_meta_if<ei_must_nest_by_value<ExpressionType>::ret,
-        ExpressionType, const ExpressionType&>::ret ExpressionTypeNested;
-    typedef CwiseUnaryOp<ei_scalar_add_op<Scalar>, ExpressionType> ScalarAddReturnType;
-
-    inline Cwise(const ExpressionType& matrix) : m_matrix(matrix) {}
-
-    /** \internal */
-    inline const ExpressionType& _expression() const { return m_matrix; }
-
-    template<typename OtherDerived>
-    const EIGEN_CWISE_PRODUCT_RETURN_TYPE
-    operator*(const AnyMatrixBase<OtherDerived> &other) const;
-
-    template<typename OtherDerived>
-    const EIGEN_CWISE_BINOP_RETURN_TYPE(ei_scalar_quotient_op)
-    operator/(const StorageBase<OtherDerived> &other) const;
-
-    template<typename OtherDerived>
-    const EIGEN_CWISE_BINOP_RETURN_TYPE(ei_scalar_min_op)
-    min(const StorageBase<OtherDerived> &other) const;
-
-    template<typename OtherDerived>
-    const EIGEN_CWISE_BINOP_RETURN_TYPE(ei_scalar_max_op)
-    max(const StorageBase<OtherDerived> &other) const;
-
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_abs_op)      abs() const;
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_abs2_op)     abs2() const;
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_square_op)   square() const;
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_cube_op)     cube() const;
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_inverse_op)  inverse() const;
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_sqrt_op)     sqrt() const;
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_exp_op)      exp() const;
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_log_op)      log() const;
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_cos_op)      cos() const;
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_sin_op)      sin() const;
-    const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_pow_op)      pow(const Scalar& exponent) const;
-
-    const ScalarAddReturnType
-    operator+(const Scalar& scalar) const;
-
-    /** \relates Cwise */
-    friend const ScalarAddReturnType
-    operator+(const Scalar& scalar, const Cwise& mat)
-    { return mat + scalar; }
-
-    ExpressionType& operator+=(const Scalar& scalar);
-
-    const ScalarAddReturnType
-    operator-(const Scalar& scalar) const;
-
-    ExpressionType& operator-=(const Scalar& scalar);
-
-    template<typename OtherDerived>
-    inline ExpressionType& operator*=(const StorageBase<OtherDerived> &other);
-
-    template<typename OtherDerived>
-    inline ExpressionType& operator/=(const StorageBase<OtherDerived> &other);
-
-    template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::less)
-    operator<(const StorageBase<OtherDerived>& other) const;
-
-    template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::less_equal)
-    operator<=(const StorageBase<OtherDerived>& other) const;
-
-    template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::greater)
-    operator>(const StorageBase<OtherDerived>& other) const;
-
-    template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::greater_equal)
-    operator>=(const StorageBase<OtherDerived>& other) const;
-
-    template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::equal_to)
-    operator==(const StorageBase<OtherDerived>& other) const;
-
-    template<typename OtherDerived> const EIGEN_CWISE_BINOP_RETURN_TYPE(std::not_equal_to)
-    operator!=(const StorageBase<OtherDerived>& other) const;
-
-    // comparisons to a scalar value
-    const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::less)
-    operator<(Scalar s) const;
-
-    const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::less_equal)
-    operator<=(Scalar s) const;
-
-    const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::greater)
-    operator>(Scalar s) const;
-
-    const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::greater_equal)
-    operator>=(Scalar s) const;
-
-    const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::equal_to)
-    operator==(Scalar s) const;
-
-    const EIGEN_CWISE_COMP_TO_SCALAR_RETURN_TYPE(std::not_equal_to)
-    operator!=(Scalar s) const;
-
-    // allow to extend Cwise outside Eigen
-    #ifdef EIGEN_CWISE_PLUGIN
-    #include EIGEN_CWISE_PLUGIN
-    #endif
-
-  protected:
-    ExpressionTypeNested m_matrix;
-
-  private:
-    Cwise& operator=(const Cwise&);
-};
-
-#endif // EIGEN_CWISE_H

Eigen/src/Core/CwiseBinaryOp.h

@@ -169,22 +169,6 @@ class CwiseBinaryOpImpl<BinaryOp, Lhs, Rhs, Dense>
     }
 };
 
-/**\returns an expression of the difference of \c *this and \a other
-  *
-  * \note If you want to substract a given scalar from all coefficients, see Cwise::operator-().
-  *
-  * \sa class CwiseBinaryOp, MatrixBase::operator-=(), Cwise::operator-()
-  */
-template<typename Derived>
-template<typename OtherDerived>
-EIGEN_STRONG_INLINE const CwiseBinaryOp<ei_scalar_difference_op<typename ei_traits<Derived>::Scalar>,
-                                 Derived, OtherDerived>
-MatrixBase<Derived>::operator-(const MatrixBase<OtherDerived> &other) const
-{
-  return CwiseBinaryOp<ei_scalar_difference_op<Scalar>,
-                       Derived, OtherDerived>(derived(), other.derived());
-}
-
 /** replaces \c *this by \c *this - \a other.
   *
   * \returns a reference to \c *this
@@ -197,22 +181,6 @@ MatrixBase<Derived>::operator-=(const MatrixBase<OtherDerived> &other)
   return *this = *this - other;
 }
 
-/** \relates MatrixBase
-  *
-  * \returns an expression of the sum of \c *this and \a other
-  *
-  * \note If you want to add a given scalar to all coefficients, see Cwise::operator+().
-  *
-  * \sa class CwiseBinaryOp, MatrixBase::operator+=(), Cwise::operator+()
-  */
-template<typename Derived>
-template<typename OtherDerived>
-EIGEN_STRONG_INLINE const CwiseBinaryOp<ei_scalar_sum_op<typename ei_traits<Derived>::Scalar>, Derived, OtherDerived>
-MatrixBase<Derived>::operator+(const MatrixBase<OtherDerived> &other) const
-{
-  return CwiseBinaryOp<ei_scalar_sum_op<Scalar>, Derived, OtherDerived>(derived(), other.derived());
-}
-
 /** replaces \c *this by \c *this + \a other.
   *
   * \returns a reference to \c *this
@@ -225,111 +193,4 @@ MatrixBase<Derived>::operator+=(const MatrixBase<OtherDerived>& other)
   return *this = *this + other;
 }
 
-/** \returns an expression of the Schur product (coefficient wise product) of *this and \a other
-  *
-  * Example: \include Cwise_product.cpp
-  * Output: \verbinclude Cwise_product.out
-  *
-  * \sa class CwiseBinaryOp, operator/(), square()
-  */
-template<typename ExpressionType,template <typename> class StorageBase>
-template<typename OtherDerived>
-EIGEN_STRONG_INLINE const EIGEN_CWISE_PRODUCT_RETURN_TYPE
-Cwise<ExpressionType,StorageBase>::operator*(const AnyMatrixBase<OtherDerived> &other) const
-{
-  return EIGEN_CWISE_PRODUCT_RETURN_TYPE(_expression(), other.derived());
-}
-
-/** \returns an expression of the coefficient-wise quotient of *this and \a other
-  *
-  * Example: \include Cwise_quotient.cpp
-  * Output: \verbinclude Cwise_quotient.out
-  *
-  * \sa class CwiseBinaryOp, operator*(), inverse()
-  */
-template<typename ExpressionType,template <typename> class StorageBase>
-template<typename OtherDerived>
-EIGEN_STRONG_INLINE const EIGEN_CWISE_BINOP_RETURN_TYPE(ei_scalar_quotient_op)
-Cwise<ExpressionType,StorageBase>::operator/(const StorageBase<OtherDerived> &other) const
-{
-  return EIGEN_CWISE_BINOP_RETURN_TYPE(ei_scalar_quotient_op)(_expression(), other.derived());
-}
-
-/** Replaces this expression by its coefficient-wise product with \a other.
-  *
-  * Example: \include Cwise_times_equal.cpp
-  * Output: \verbinclude Cwise_times_equal.out
-  *
-  * \sa operator*(), operator/=()
-  */
-template<typename ExpressionType,template <typename> class StorageBase>
-template<typename OtherDerived>
-inline ExpressionType& Cwise<ExpressionType,StorageBase>::operator*=(const StorageBase<OtherDerived> &other)
-{
-  return m_matrix.const_cast_derived() = *this * other;
-}
-
-/** Replaces this expression by its coefficient-wise quotient by \a other.
-  *
-  * Example: \include Cwise_slash_equal.cpp
-  * Output: \verbinclude Cwise_slash_equal.out
-  *
-  * \sa operator/(), operator*=()
-  */
-template<typename ExpressionType,template <typename> class StorageBase>
-template<typename OtherDerived>
-inline ExpressionType& Cwise<ExpressionType,StorageBase>::operator/=(const StorageBase<OtherDerived> &other)
-{
-  return m_matrix.const_cast_derived() = *this / other;
-}
-
-/** \returns an expression of the coefficient-wise min of *this and \a other
-  *
-  * Example: \include Cwise_min.cpp
-  * Output: \verbinclude Cwise_min.out
-  *
-  * \sa class CwiseBinaryOp
-  */
-template<typename ExpressionType,template <typename> class StorageBase>
-template<typename OtherDerived>
-EIGEN_STRONG_INLINE const EIGEN_CWISE_BINOP_RETURN_TYPE(ei_scalar_min_op)
-Cwise<ExpressionType,StorageBase>::min(const StorageBase<OtherDerived> &other) const
-{
-  return EIGEN_CWISE_BINOP_RETURN_TYPE(ei_scalar_min_op)(_expression(), other.derived());
-}
-
-/** \returns an expression of the coefficient-wise max of *this and \a other
-  *
-  * Example: \include Cwise_max.cpp
-  * Output: \verbinclude Cwise_max.out
-  *
-  * \sa class CwiseBinaryOp
-  */
-template<typename ExpressionType,template <typename> class StorageBase>
-template<typename OtherDerived>
-EIGEN_STRONG_INLINE const EIGEN_CWISE_BINOP_RETURN_TYPE(ei_scalar_max_op)
-Cwise<ExpressionType,StorageBase>::max(const StorageBase<OtherDerived> &other) const
-{
-  return EIGEN_CWISE_BINOP_RETURN_TYPE(ei_scalar_max_op)(_expression(), other.derived());
-}
-
-/** \returns an expression of a custom coefficient-wise operator \a func of *this and \a other
-  *
-  * The template parameter \a CustomBinaryOp is the type of the functor
-  * of the custom operator (see class CwiseBinaryOp for an example)
-  *
-  * Here is an example illustrating the use of custom functors:
-  * \include class_CwiseBinaryOp.cpp
-  * Output: \verbinclude class_CwiseBinaryOp.out
-  *
-  * \sa class CwiseBinaryOp, MatrixBase::operator+, MatrixBase::operator-, Cwise::operator*, Cwise::operator/
-  */
-template<typename Derived>
-template<typename CustomBinaryOp, typename OtherDerived>
-EIGEN_STRONG_INLINE const CwiseBinaryOp<CustomBinaryOp, Derived, OtherDerived>
-MatrixBase<Derived>::binaryExpr(const MatrixBase<OtherDerived> &other, const CustomBinaryOp& func) const
-{
-  return CwiseBinaryOp<CustomBinaryOp, Derived, OtherDerived>(derived(), other.derived(), func);
-}
-
 #endif // EIGEN_CWISE_BINARY_OP_H

Eigen/src/Core/CwiseBinaryOps.h

@@ -0,0 +1,139 @@
+/** \returns an expression of the difference of \c *this and \a other
+  *
+  * \note If you want to substract a given scalar from all coefficients, see Cwise::operator-().
+  *
+  * \sa class CwiseBinaryOp, MatrixBase::operator-=()
+  */
+template<typename OtherDerived>
+EIGEN_STRONG_INLINE const CwiseBinaryOp<ei_scalar_difference_op<typename ei_traits<Derived>::Scalar>,
+                                 Derived, OtherDerived>
+operator-(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const
+{
+  return CwiseBinaryOp<ei_scalar_difference_op<Scalar>,
+                       Derived, OtherDerived>(derived(), other.derived());
+}
+
+/** \returns an expression of the sum of \c *this and \a other
+  *
+  * \note If you want to add a given scalar to all coefficients, see Cwise::operator+().
+  *
+  * \sa class CwiseBinaryOp, MatrixBase::operator+=()
+  */
+template<typename OtherDerived>
+EIGEN_STRONG_INLINE const CwiseBinaryOp<ei_scalar_sum_op<typename ei_traits<Derived>::Scalar>, Derived, OtherDerived>
+operator+(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const
+{
+  return CwiseBinaryOp<ei_scalar_sum_op<Scalar>, Derived, OtherDerived>(derived(), other.derived());
+}
+
+/** \returns an expression of a custom coefficient-wise operator \a func of *this and \a other
+  *
+  * The template parameter \a CustomBinaryOp is the type of the functor
+  * of the custom operator (see class CwiseBinaryOp for an example)
+  *
+  * Here is an example illustrating the use of custom functors:
+  * \include class_CwiseBinaryOp.cpp
+  * Output: \verbinclude class_CwiseBinaryOp.out
+  *
+  * \sa class CwiseBinaryOp, MatrixBase::operator+, MatrixBase::operator-, MatrixBase::cwiseProduct
+  */
+template<typename CustomBinaryOp, typename OtherDerived>
+EIGEN_STRONG_INLINE const CwiseBinaryOp<CustomBinaryOp, Derived, OtherDerived>
+binaryExpr(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other, const CustomBinaryOp& func = CustomBinaryOp()) const
+{
+  return CwiseBinaryOp<CustomBinaryOp, Derived, OtherDerived>(derived(), other.derived(), func);
+}
+
+/** \returns an expression of the Schur product (coefficient wise product) of *this and \a other
+  *
+  * Example: \include MatrixBase_cwiseProduct.cpp
+  * Output: \verbinclude MatrixBase_cwiseProduct.out
+  *
+  * \sa class CwiseBinaryOp, cwiseAbs2
+  */
+template<typename OtherDerived>
+EIGEN_STRONG_INLINE const CwiseBinaryOp<ei_scalar_product_op<Scalar>, Derived, OtherDerived>
+cwiseProduct(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const
+{
+  return CwiseBinaryOp<ei_scalar_product_op<Scalar>, Derived, OtherDerived>(derived(), other.derived());
+}
+
+/** \returns an expression of the coefficient-wise == operator of *this and \a other
+  *
+  * \warning this performs an exact comparison, which is generally a bad idea with floating-point types.
+  * In order to check for equality between two vectors or matrices with floating-point coefficients, it is
+  * generally a far better idea to use a fuzzy comparison as provided by MatrixBase::isApprox() and
+  * MatrixBase::isMuchSmallerThan().
+  *
+  * Example: \include MatrixBase_cwiseEqual.cpp
+  * Output: \verbinclude MatrixBase_cwiseEqual.out
+  *
+  * \sa MatrixBase::cwiseNotEqual(), MatrixBase::isApprox(), MatrixBase::isMuchSmallerThan()
+  */
+template<typename OtherDerived>
+inline const CwiseBinaryOp<std::equal_to<Scalar>, Derived, OtherDerived>
+cwiseEqual(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const
+{
+  return CwiseBinaryOp<std::equal_to<Scalar>, Derived, OtherDerived>(derived(), other.derived());
+}
+
+/** \returns an expression of the coefficient-wise != operator of *this and \a other
+  *
+  * \warning this performs an exact comparison, which is generally a bad idea with floating-point types.
+  * In order to check for equality between two vectors or matrices with floating-point coefficients, it is
+  * generally a far better idea to use a fuzzy comparison as provided by MatrixBase::isApprox() and
+  * MatrixBase::isMuchSmallerThan().
+  *
+  * Example: \include MatrixBase_cwiseNotEqual.cpp
+  * Output: \verbinclude MatrixBase_cwiseNotEqual.out
+  *
+  * \sa MatrixBase::cwiseEqual(), MatrixBase::isApprox(), MatrixBase::isMuchSmallerThan()
+  */
+template<typename OtherDerived>
+inline const CwiseBinaryOp<std::not_equal_to<Scalar>, Derived, OtherDerived>
+cwiseNotEqual(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const
+{
+  return CwiseBinaryOp<std::not_equal_to<Scalar>, Derived, OtherDerived>(derived(), other.derived());
+}
+
+/** \returns an expression of the coefficient-wise min of *this and \a other
+  *
+  * Example: \include MatrixBase_cwiseMin.cpp
+  * Output: \verbinclude MatrixBase_cwiseMin.out
+  *
+  * \sa class CwiseBinaryOp, max()
+  */
+template<typename OtherDerived>
+EIGEN_STRONG_INLINE const CwiseBinaryOp<ei_scalar_min_op<Scalar>, Derived, OtherDerived>
+cwiseMin(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const
+{
+  return CwiseBinaryOp<ei_scalar_min_op<Scalar>, Derived, OtherDerived>(derived(), other.derived());
+}
+
+/** \returns an expression of the coefficient-wise max of *this and \a other
+  *
+  * Example: \include MatrixBase_cwiseMax.cpp
+  * Output: \verbinclude MatrixBase_cwiseMax.out
+  *
+  * \sa class CwiseBinaryOp, min()
+  */
+template<typename OtherDerived>
+EIGEN_STRONG_INLINE const CwiseBinaryOp<ei_scalar_max_op<Scalar>, Derived, OtherDerived>
+cwiseMax(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const
+{
+  return CwiseBinaryOp<ei_scalar_max_op<Scalar>, Derived, OtherDerived>(derived(), other.derived());
+}
+
+/** \returns an expression of the coefficient-wise quotient of *this and \a other
+  *
+  * Example: \include MatrixBase_cwiseQuotient.cpp
+  * Output: \verbinclude MatrixBase_cwiseQuotient.out
+  *
+  * \sa class CwiseBinaryOp, cwiseProduct(), cwiseInverse()
+  */
+template<typename OtherDerived>
+EIGEN_STRONG_INLINE const CwiseBinaryOp<ei_scalar_quotient_op<Scalar>, Derived, OtherDerived>
+cwiseQuotient(const EIGEN_CURRENT_STORAGE_BASE_CLASS<OtherDerived> &other) const
+{
+  return CwiseBinaryOp<ei_scalar_quotient_op<Scalar>, Derived, OtherDerived>(derived(), other.derived());
+}

Eigen/src/Core/CwiseUnaryOp.h

@@ -128,60 +128,4 @@ class CwiseUnaryOpImpl<UnaryOp,MatrixType,Dense> : public MatrixBase<CwiseUnaryO
     }
 };
 
-/** \returns an expression of the coefficient-wise absolute value of \c *this
-  *
-  * Example: \include Cwise_abs.cpp
-  * Output: \verbinclude Cwise_abs.out
-  *
-  * \sa abs2()
-  */
-template<typename ExpressionType,template <typename> class StorageBase>
-EIGEN_STRONG_INLINE const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_abs_op)
-Cwise<ExpressionType,StorageBase>::abs() const
-{
-  return _expression();
-}
-
-/** \returns an expression of the coefficient-wise squared absolute value of \c *this
-  *
-  * Example: \include Cwise_abs2.cpp
-  * Output: \verbinclude Cwise_abs2.out
-  *
-  * \sa abs(), square()
-  */
-template<typename ExpressionType,template <typename> class StorageBase>
-EIGEN_STRONG_INLINE const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_abs2_op)
-Cwise<ExpressionType,StorageBase>::abs2() const
-{
-  return _expression();
-}
-
-/** \returns an expression of the coefficient-wise exponential of *this.
-  *
-  * Example: \include Cwise_exp.cpp
-  * Output: \verbinclude Cwise_exp.out
-  *
-  * \sa pow(), log(), sin(), cos()
-  */
-template<typename ExpressionType,template <typename> class StorageBase>
-inline const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_exp_op)
-Cwise<ExpressionType,StorageBase>::exp() const
-{
-  return _expression();
-}
-
-/** \returns an expression of the coefficient-wise logarithm of *this.
-  *
-  * Example: \include Cwise_log.cpp
-  * Output: \verbinclude Cwise_log.out
-  *
-  * \sa exp()
-  */
-template<typename ExpressionType,template <typename> class StorageBase>
-inline const EIGEN_CWISE_UNOP_RETURN_TYPE(ei_scalar_log_op)
-Cwise<ExpressionType,StorageBase>::log() const
-{
-  return _expression();
-}
-
 #endif // EIGEN_CWISE_UNARY_OP_H

Eigen/src/Core/CwiseUnaryOps.h

@@ -156,26 +156,58 @@ real() { return derived(); }
 EIGEN_STRONG_INLINE NonConstImagReturnType
 imag() { return derived(); }
 
-/** \returns a Cwise wrapper of *this providing additional coefficient-wise operations
+/** \returns an expression of the coefficient-wise absolute value of \c *this
   *
-  * Example: \include MatrixBase_cwise_const.cpp
-  * Output: \verbinclude MatrixBase_cwise_const.out
+  * Example: \include MatrixBase_cwiseAbs.cpp
+  * Output: \verbinclude MatrixBase_cwiseAbs.out
   *
-  * \sa class Cwise, cwise()
+  * \sa cwiseAbs2()
   */
-inline const Cwise<Derived,EIGEN_CURRENT_STORAGE_BASE_CLASS> cwise() const
-{
-  return derived();
-}
+EIGEN_STRONG_INLINE const CwiseUnaryOp<ei_scalar_abs_op<Scalar>,Derived>
+cwiseAbs() const { return derived(); }
 
-/** \returns a Cwise wrapper of *this providing additional coefficient-wise operations
+/** \returns an expression of the coefficient-wise squared absolute value of \c *this
   *
-  * Example: \include MatrixBase_cwise.cpp
-  * Output: \verbinclude MatrixBase_cwise.out
+  * Example: \include MatrixBase_cwiseAbs2.cpp
+  * Output: \verbinclude MatrixBase_cwiseAbs2.out
   *
-  * \sa class Cwise, cwise() const
+  * \sa cwiseAbs()
   */
-inline Cwise<Derived,EIGEN_CURRENT_STORAGE_BASE_CLASS> cwise()
+EIGEN_STRONG_INLINE const CwiseUnaryOp<ei_scalar_abs2_op<Scalar>,Derived>
+cwiseAbs2() const { return derived(); }
+
+/** \returns an expression of the coefficient-wise square root of *this.
+  *
+  * Example: \include MatrixBase_cwiseSqrt.cpp
+  * Output: \verbinclude MatrixBase_cwiseSqrt.out
+  *
+  * \sa cwisePow(), cwiseSquare()
+  */
+inline const CwiseUnaryOp<ei_scalar_sqrt_op<Scalar>,Derived>
+cwiseSqrt() const { return derived(); }
+
+/** \returns an expression of the coefficient-wise inverse of *this.
+  *
+  * Example: \include MatrixBase_cwiseInverse.cpp
+  * Output: \verbinclude MatrixBase_cwiseInverse.out
+  *
+  * \sa cwiseProduct()
+  */
+inline const CwiseUnaryOp<ei_scalar_inverse_op<Scalar>,Derived>
+cwiseInverse() const { return derived(); }
+
+/** \returns an expression of the coefficient-wise == operator of \c *this and a scalar \a s
+  *
+  * \warning this performs an exact comparison, which is generally a bad idea with floating-point types.
+  * In order to check for equality between two vectors or matrices with floating-point coefficients, it is
+  * generally a far better idea to use a fuzzy comparison as provided by MatrixBase::isApprox() and
+  * MatrixBase::isMuchSmallerThan().
+  *
+  * \sa cwiseEqual(const MatrixBase<OtherDerived> &) const
+  */
+inline const CwiseUnaryOp<std::binder1st<std::equal_to<Scalar> >,Derived>
+cwiseEqual(Scalar s) const
 {
-  return derived();
+  return CwiseUnaryOp<std::binder1st<std::equal_to<Scalar> >,Derived>
+          (derived(), std::bind1st(std::equal_to<Scalar>(), s));
 }

Eigen/src/Core/DiagonalMatrix.h

@@ -68,6 +68,12 @@ class DiagonalBase : public AnyMatrixBase<Derived>
     template<typename MatrixDerived>
     const DiagonalProduct<MatrixDerived, Derived, OnTheLeft>
     operator*(const MatrixBase<MatrixDerived> &matrix) const;
+
+    inline const DiagonalWrapper<NestByValue<CwiseUnaryOp<ei_scalar_inverse_op<Scalar>, DiagonalVectorType> > >
+    inverse() const
+    {
+      return diagonal().cwiseInverse().nestByValue();
+    }
 };
 
 template<typename Derived>

Eigen/src/Core/Dot.h

@@ -279,7 +279,7 @@ MatrixBase<Derived>::dot(const MatrixBase<OtherDerived>& other) const
 template<typename Derived>
 inline typename NumTraits<typename ei_traits<Derived>::Scalar>::Real MatrixBase<Derived>::squaredNorm() const
 {
-  return ei_real((*this).cwise().abs2().sum());
+  return ei_real((*this).cwiseAbs2().sum());
 }
 
 /** \returns the \em l2 norm of *this, i.e., for vectors, the square root of the dot product of *this with itself.

Eigen/src/Core/Flagged.h

@@ -1,149 +0,0 @@
-// This file is part of Eigen, a lightweight C++ template library
-// for linear algebra.
-//
-// Copyright (C) 2008 Benoit Jacob <jacob.benoit.1@gmail.com>
-//
-// 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
-
-/** \deprecated it is only used by lazy() which is deprecated
-  *
-  * \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> > : ei_traits<ExpressionType>
-{
-  enum { Flags = (ExpressionType::Flags | Added) & ~Removed };
-};
-
-template<typename ExpressionType, unsigned int Added, unsigned int Removed> class Flagged
-  : public MatrixBase<Flagged<ExpressionType, Added, Removed> >
-{
-  public:
-
-    EIGEN_GENERIC_PUBLIC_INTERFACE(Flagged)
-    typedef typename ei_meta_if<ei_must_nest_by_value<ExpressionType>::ret,
-        ExpressionType, const ExpressionType&>::ret ExpressionTypeNested;
-    typedef typename ExpressionType::InnerIterator InnerIterator;
-
-    inline Flagged(const ExpressionType& matrix) : m_matrix(matrix) {}
-
-    inline int rows() const { return m_matrix.rows(); }
-    inline int cols() const { return m_matrix.cols(); }
-    inline int stride() const { return m_matrix.stride(); }
-
-    inline const Scalar coeff(int row, int col) const
-    {
-      return m_matrix.coeff(row, col);
-    }
-
-    inline Scalar& coeffRef(int row, int col)
-    {
-      return m_matrix.const_cast_derived().coeffRef(row, col);
-    }
-
-    inline const Scalar coeff(int index) const
-    {
-      return m_matrix.coeff(index);
-    }
-
-    inline Scalar& coeffRef(int index)
-    {
-      return m_matrix.const_cast_derived().coeffRef(index);
-    }
-
-    template<int LoadMode>
-    inline const PacketScalar packet(int row, int col) const
-    {
-      return m_matrix.template packet<LoadMode>(row, col);
-    }
-
-    template<int LoadMode>
-    inline void writePacket(int row, int col, const PacketScalar& x)
-    {
-      m_matrix.const_cast_derived().template writePacket<LoadMode>(row, col, x);
-    }
-
-    template<int LoadMode>
-    inline const PacketScalar packet(int index) const
-    {
-      return m_matrix.template packet<LoadMode>(index);
-    }
-
-    template<int LoadMode>
-    inline void writePacket(int index, const PacketScalar& x)
-    {
-      m_matrix.const_cast_derived().template writePacket<LoadMode>(index, x);
-    }
-
-    const ExpressionType& _expression() const { return m_matrix; }
-
-  protected:
-    ExpressionTypeNested m_matrix;
-};
-
-/** \deprecated it is only used by lazy() which is deprecated
-  *
-  * \returns an expression of *this with added flags
-  *
-  * Example: \include MatrixBase_marked.cpp
-  * Output: \verbinclude MatrixBase_marked.out
-  *
-  * \sa class Flagged, extract(), part()
-  */
-template<typename Derived>
-template<unsigned int Added>
-inline const Flagged<Derived, Added, 0>
-MatrixBase<Derived>::marked() const
-{
-  return derived();
-}
-
-/** \deprecated use MatrixBase::noalias()
-  * 
-  * \returns an expression of *this with the EvalBeforeAssigningBit flag removed.
-  *
-  * Example: \include MatrixBase_lazy.cpp
-  * Output: \verbinclude MatrixBase_lazy.out
-  *
-  * \sa class Flagged, marked()
-  */
-template<typename Derived>
-inline const Flagged<Derived, 0, EvalBeforeAssigningBit>
-MatrixBase<Derived>::lazy() const
-{
-  return derived();
-}
-
-#endif // EIGEN_FLAGGED_H

Eigen/src/Core/Fuzzy.h

@@ -54,7 +54,7 @@ bool MatrixBase<Derived>::isApprox(
 {
   const typename ei_nested<Derived,2>::type nested(derived());
   const typename ei_nested<OtherDerived,2>::type otherNested(other.derived());
-  return (nested - otherNested).cwise().abs2().sum() <= prec * prec * std::min(nested.cwise().abs2().sum(), otherNested.cwise().abs2().sum());
+  return (nested - otherNested).cwiseAbs2().sum() <= prec * prec * std::min(nested.cwiseAbs2().sum(), otherNested.cwiseAbs2().sum());
 }
 
 /** \returns \c true if the norm of \c *this is much smaller than \a other,
@@ -76,7 +76,7 @@ bool MatrixBase<Derived>::isMuchSmallerThan(
   RealScalar prec
 ) const
 {
-  return cwise().abs2().sum() <= prec * prec * other * other;
+  return cwiseAbs2().sum() <= prec * prec * other * other;
 }
 
 /** \returns \c true if the norm of \c *this is much smaller than the norm of \a other,
@@ -96,7 +96,7 @@ bool MatrixBase<Derived>::isMuchSmallerThan(
   RealScalar prec
 ) const
 {
-  return this->cwise().abs2().sum() <= prec * prec * other.cwise().abs2().sum();
+  return cwiseAbs2().sum() <= prec * prec * other.cwiseAbs2().sum();
 }
 
 #else

Eigen/src/Core/MatrixBase.h

@@ -247,6 +247,7 @@ template<typename Derived> class MatrixBase
 
     #define EIGEN_CURRENT_STORAGE_BASE_CLASS Eigen::MatrixBase
     #include "CwiseUnaryOps.h"
+    #include "CwiseBinaryOps.h"
     #undef EIGEN_CURRENT_STORAGE_BASE_CLASS
 
     /** Copies \a other into *this. \returns a reference to *this. */
@@ -275,12 +276,6 @@ template<typename Derived> class MatrixBase
     template<typename OtherDerived>
     Derived& lazyAssign(const MatrixBase<OtherDerived>& other);
 
-    /** \deprecated because .lazy() is deprecated
-      * Overloaded for cache friendly product evaluation */
-    template<typename OtherDerived>
-    Derived& lazyAssign(const Flagged<OtherDerived, 0, EvalBeforeAssigningBit>& other)
-    { return lazyAssign(other._expression()); }
-
     template<typename ProductDerived, typename Lhs, typename Rhs>
     Derived& lazyAssign(const ProductBase<ProductDerived, Lhs,Rhs>& other);
 
@@ -342,15 +337,6 @@ template<typename Derived> class MatrixBase
     Scalar& z();
     Scalar& w();
 
-
-    template<typename OtherDerived>
-    const CwiseBinaryOp<ei_scalar_sum_op<typename ei_traits<Derived>::Scalar>, Derived, OtherDerived>
-    operator+(const MatrixBase<OtherDerived> &other) const;
-
-    template<typename OtherDerived>
-    const CwiseBinaryOp<ei_scalar_difference_op<typename ei_traits<Derived>::Scalar>, Derived, OtherDerived>
-    operator-(const MatrixBase<OtherDerived> &other) const;
-
     template<typename OtherDerived>
     Derived& operator+=(const MatrixBase<OtherDerived>& other);
     template<typename OtherDerived>
@@ -373,14 +359,6 @@ template<typename Derived> class MatrixBase
     const DiagonalProduct<Derived, DiagonalDerived, OnTheRight>
     operator*(const DiagonalBase<DiagonalDerived> &diagonal) const;
 
-    template<typename OtherDerived>
-    typename ei_plain_matrix_type_column_major<OtherDerived>::type
-    solveTriangular(const MatrixBase<OtherDerived>& other) const;
-
-    template<typename OtherDerived>
-    void solveTriangularInPlace(const MatrixBase<OtherDerived>& other) const;
-
-
     template<typename OtherDerived>
     Scalar dot(const MatrixBase<OtherDerived>& other) const;
     RealScalar squaredNorm() const;
@@ -542,11 +520,11 @@ template<typename Derived> class MatrixBase
 
     template<typename OtherDerived>
     inline bool operator==(const MatrixBase<OtherDerived>& other) const
-    { return (cwise() == other).all(); }
+    { return cwiseEqual(other).all(); }
 
     template<typename OtherDerived>
     inline bool operator!=(const MatrixBase<OtherDerived>& other) const
-    { return (cwise() != other).any(); }
+    { return cwiseNotEqual(other).all(); }
 
 
     /** \returns the matrix or vector obtained by evaluating this expression.
@@ -560,10 +538,6 @@ template<typename Derived> class MatrixBase
     template<typename OtherDerived>
     void swap(MatrixBase<OtherDerived> EIGEN_REF_TO_TEMPORARY other);
 
-    template<unsigned int Added>
-    const Flagged<Derived, Added, 0> marked() const;
-    const Flagged<Derived, 0, EvalBeforeAssigningBit> lazy() const;
-
     NoAlias<Derived,Eigen::MatrixBase > noalias();
 
     /** \returns number of elements to skip to pass from one row (resp. column) to another
@@ -575,12 +549,6 @@ template<typename Derived> class MatrixBase
 
     inline const NestByValue<Derived> nestByValue() const;
 
-
-    template<typename CustomBinaryOp, typename OtherDerived>
-    const CwiseBinaryOp<CustomBinaryOp, Derived, OtherDerived>
-    binaryExpr(const MatrixBase<OtherDerived> &other, const CustomBinaryOp& func = CustomBinaryOp()) const;
-
-
     Scalar sum() const;
     Scalar mean() const;
     Scalar trace() const;
@@ -736,6 +704,33 @@ template<typename Derived> class MatrixBase
     #include EIGEN_MATRIXBASE_PLUGIN
     #endif
 
+#ifdef EIGEN2_SUPPORT
+    /** \deprecated because .lazy() is deprecated
+      * Overloaded for cache friendly product evaluation */
+    template<typename OtherDerived>
+    Derived& lazyAssign(const Flagged<OtherDerived, 0, EvalBeforeAssigningBit>& other)
+    { return lazyAssign(other._expression()); }
+
+    template<unsigned int Added>
+    const Flagged<Derived, Added, 0> marked() const;
+    const Flagged<Derived, 0, EvalBeforeAssigningBit> lazy() const;
+
+    inline const Cwise<Derived> cwise() const;
+    inline Cwise<Derived> cwise();
+
+    // a workaround waiting the Array class
+    inline const Cwise<Derived> array() const { return cwise(); }
+    // a workaround waiting the Array class
+    inline Cwise<Derived> array() { return cwise(); }
+
+    template<typename OtherDerived>
+    typename ei_plain_matrix_type_column_major<OtherDerived>::type
+    solveTriangular(const MatrixBase<OtherDerived>& other) const;
+
+    template<typename OtherDerived>
+    void solveTriangularInPlace(const MatrixBase<OtherDerived>& other) const;
+#endif
+
   protected:
     /** Default constructor. Do nothing. */
     MatrixBase()

Eigen/src/Core/Product.h

@@ -170,7 +170,7 @@ class GeneralProduct<Lhs, Rhs, InnerProduct>
 
     EIGEN_STRONG_INLINE Scalar value() const
     {
-      return (m_lhs.transpose().cwise()*m_rhs).sum();
+      return (m_lhs.transpose().cwiseProduct(m_rhs)).sum();
     }
 
     template<typename Dest> void scaleAndAddTo(Dest& dst, Scalar alpha) const
@@ -403,7 +403,7 @@ template<> struct ei_gemv_selector<OnTheRight,RowMajor,false>
     // TODO makes sure rhs is sequentially stored in memory, otherwise use a temp
     const int rows = prod.rows();
     for(int i=0; i<rows; ++i)
-      dest.coeffRef(i) += alpha * (prod.lhs().row(i).cwise() * prod.rhs().transpose()).sum();
+      dest.coeffRef(i) += alpha * (prod.lhs().row(i).cwiseProduct(prod.rhs().transpose())).sum();
   }
 };
 
@@ -431,7 +431,7 @@ MatrixBase<Derived>::operator*(const MatrixBase<OtherDerived> &other) const
   };
   // note to the lost user:
   //    * for a dot product use: v1.dot(v2)
-  //    * for a coeff-wise product use: v1.cwise()*v2
+  //    * for a coeff-wise product use: v1.cwiseProduct(v2)
   EIGEN_STATIC_ASSERT(ProductIsValid || !(AreVectors && SameSizes),
     INVALID_VECTOR_VECTOR_PRODUCT__IF_YOU_WANTED_A_DOT_OR_COEFF_WISE_PRODUCT_YOU_MUST_USE_THE_EXPLICIT_FUNCTIONS)
   EIGEN_STATIC_ASSERT(ProductIsValid || !(SameSizes && !AreVectors),

Eigen/src/Core/SolveTriangular.h

@@ -78,8 +78,7 @@ struct ei_triangular_solver_selector<Lhs,Rhs,OnTheLeft,Mode,NoUnrolling,RowMajor
         int i = IsLowerTriangular ? pi+k : pi-k-1;
         int s = IsLowerTriangular ? pi : i+1;
         if (k>0)
-          other.coeffRef(i) -= ((lhs.row(i).segment(s,k).transpose())
-                              .cwise()*(other.segment(s,k))).sum();
+          other.coeffRef(i) -= (lhs.row(i).segment(s,k).transpose().cwiseProduct(other.segment(s,k))).sum();
 
         if(!(Mode & UnitDiagBit))
           other.coeffRef(i) /= lhs.coeff(i,i);
@@ -180,8 +179,7 @@ struct ei_triangular_solver_unroller<Lhs,Rhs,Mode,Index,Size,false> {
   static void run(const Lhs& lhs, Rhs& rhs)
   {
     if (Index>0)
-      rhs.coeffRef(I) -=      ((lhs.row(I).template segment<Index>(S).transpose())
-                      .cwise()*(rhs.template segment<Index>(S))).sum();
+      rhs.coeffRef(I) -=      ((lhs.row(I).template segment<Index>(S).transpose()).cwiseProduct(rhs.template segment<Index>(S))).sum();
 
     if(!(Mode & UnitDiagBit))
       rhs.coeffRef(I) /= lhs.coeff(I,I);

Eigen/src/Core/StableNorm.h

@@ -28,7 +28,7 @@
 template<typename ExpressionType, typename Scalar>
 inline void ei_stable_norm_kernel(const ExpressionType& bl, Scalar& ssq, Scalar& scale, Scalar& invScale)
 {
-  Scalar max = bl.cwise().abs().maxCoeff();
+  Scalar max = bl.cwiseAbs().maxCoeff();
   if (max>scale)
   {
     ssq = ssq * ei_abs2(scale/max);
@@ -182,7 +182,7 @@ template<typename Derived>
 inline typename NumTraits<typename ei_traits<Derived>::Scalar>::Real
 MatrixBase<Derived>::hypotNorm() const
 {
-  return this->cwise().abs().redux(ei_scalar_hypot_op<RealScalar>());
+  return this->cwiseAbs().redux(ei_scalar_hypot_op<RealScalar>());
 }
 
 #endif // EIGEN_STABLENORM_H

Eigen/src/Core/util/ForwardDeclarations.h

@@ -60,7 +60,6 @@ template<typename MatrixType, int PacketAccess = AsRequested> class Map;
 template<typename Derived> class TriangularBase;
 template<typename MatrixType, unsigned int Mode> class TriangularView;
 template<typename MatrixType, unsigned int Mode> class SelfAdjointView;
-template<typename ExpressionType, template <typename> class StorageBase> class Cwise;
 template<typename ExpressionType> class WithFormat;
 template<typename MatrixType> struct CommaInitializer;
 template<typename Derived> class ReturnByValue;
@@ -146,4 +145,8 @@ template<typename Scalar,int Dim> class Translation;
 template<typename Scalar> class UniformScaling;
 template<typename MatrixType,int Direction> class Homogeneous;
 
+#ifdef EIGEN2_SUPPORT
+template<typename ExpressionType> class Cwise;
+#endif
+
 #endif // EIGEN_FORWARDDECLARATIONS_H