move the strides API to DenseCoeffsBase,

and various fixes to make stuff compile after my big changes

Eigen/src/Core/Coeffs.h

@@ -213,6 +213,7 @@ class DenseCoeffsBase : public EigenBase<Derived>
       return derived().template packet<LoadMode>(index);
     }
 
+  protected:
     void coeffRef();
     void coeffRefByOuterInner();
     void writePacket();
@@ -221,6 +222,11 @@ class DenseCoeffsBase : public EigenBase<Derived>
     void copyCoeffByOuterInner();
     void copyPacket();
     void copyPacketByOuterInner();
+    void stride();
+    void innerStride();
+    void outerStride();
+    void rowStride();
+    void colStride();
 };
 
 template<typename Derived>
@@ -238,6 +244,12 @@ class DenseCoeffsBase<Derived, true> : public DenseCoeffsBase<Derived, false>
     using Base::derived;
     using Base::rowIndexByOuterInner;
     using Base::colIndexByOuterInner;
+    using Base::operator[];
+    using Base::operator();
+    using Base::x;
+    using Base::y;
+    using Base::z;
+    using Base::w;
 
     /** Short version: don't use this function, use
       * \link operator()(int,int) \endlink instead.
@@ -485,6 +497,48 @@ class DenseCoeffsBase<Derived, true> : public DenseCoeffsBase<Derived, false>
       derived().copyPacket<OtherDerived, StoreMode, LoadMode>(row, col, other);
     }
 #endif
+
+    /** \returns the pointer increment between two consecutive elements within a slice in the inner direction.
+      *
+      * \sa outerStride(), rowStride(), colStride()
+      */
+    inline int innerStride() const
+    {
+      return derived().innerStride();
+    }
+
+    /** \returns the pointer increment between two consecutive inner slices (for example, between two consecutive columns
+      *          in a column-major matrix).
+      *
+      * \sa innerStride(), rowStride(), colStride()
+      */
+    inline int outerStride() const
+    {
+      return derived().outerStride();
+    }
+
+    inline int stride() const
+    {
+      return Derived::IsVectorAtCompileTime ? innerStride() : outerStride();
+    }
+
+    /** \returns the pointer increment between two consecutive rows.
+      *
+      * \sa innerStride(), outerStride(), colStride()
+      */
+    inline int rowStride() const
+    {
+      return Derived::IsRowMajor ? outerStride() : innerStride();
+    }
+
+    /** \returns the pointer increment between two consecutive columns.
+      *
+      * \sa innerStride(), outerStride(), rowStride()
+      */
+    inline int colStride() const
+    {
+      return Derived::IsRowMajor ? innerStride() : outerStride();
+    }
 };
 
 template<typename Derived, bool JustReturnZero>

Eigen/src/Core/CwiseUnaryView.h

@@ -91,7 +91,7 @@ class CwiseUnaryView : ei_no_assignment_operator,
   protected:
     // FIXME changed from MatrixType::Nested because of a weird compilation error with sun CC
     const typename ei_nested<MatrixType>::type m_matrix;
-    const ViewOp m_functor;
+    ViewOp m_functor;
 };
 
 template<typename ViewOp, typename MatrixType>
@@ -102,6 +102,8 @@ class CwiseUnaryViewImpl<ViewOp,MatrixType,Dense>
 
   public:
 
+    typedef typename ei_dense_xpr_base< CwiseUnaryView<ViewOp, MatrixType> >::type Base;
+
     inline int innerStride() const
     {
       return derived().nestedExpression().innerStride() * sizeof(typename ei_traits<MatrixType>::Scalar) / sizeof(Scalar);
@@ -112,15 +114,14 @@ class CwiseUnaryViewImpl<ViewOp,MatrixType,Dense>
       return derived().nestedExpression().outerStride();
     }
 
-    typedef typename ei_dense_xpr_base<CwiseUnaryView<ViewOp, MatrixType> >::type Base;
     EIGEN_DENSE_PUBLIC_INTERFACE(Derived)
 
-    EIGEN_STRONG_INLINE const Scalar coeff(int row, int col) const
+    EIGEN_STRONG_INLINE CoeffReturnType coeff(int row, int col) const
     {
       return derived().functor()(derived().nestedExpression().coeff(row, col));
     }
 
-    EIGEN_STRONG_INLINE const Scalar coeff(int index) const
+    EIGEN_STRONG_INLINE CoeffReturnType coeff(int index) const
     {
       return derived().functor()(derived().nestedExpression().coeff(index));
     }

Eigen/src/Core/DenseBase.h

@@ -102,6 +102,12 @@ template<typename Derived> class DenseBase
     using Base::y;
     using Base::z;
     using Base::w;
+    using Base::stride;
+    using Base::innerStride;
+    using Base::outerStride;
+    using Base::rowStride;
+    using Base::colStride;
+    using Base::CoeffReturnType;
 
 #endif // not EIGEN_PARSED_BY_DOXYGEN
 
@@ -246,9 +252,6 @@ template<typename Derived> class DenseBase
     }
 
 #ifndef EIGEN_PARSED_BY_DOXYGEN
-    /** \internal the return type of coeff()
-      */
-    typedef typename ei_meta_if<ei_has_direct_access<Derived>::ret, const Scalar&, Scalar>::ret CoeffReturnType;
 
     /** \internal Represents a matrix with all coefficients equal to one another*/
     typedef CwiseNullaryOp<ei_scalar_constant_op<Scalar>,Derived> ConstantReturnType;
@@ -301,48 +304,6 @@ template<typename Derived> class DenseBase
     Derived& lazyAssign(const DenseBase<OtherDerived>& other);
 #endif // not EIGEN_PARSED_BY_DOXYGEN
 
-    /** \returns the pointer increment between two consecutive elements within a slice in the inner direction.
-      *
-      * \sa outerStride(), rowStride(), colStride()
-      */
-    inline int innerStride() const
-    {
-      return derived().innerStride();
-    }
-
-    /** \returns the pointer increment between two consecutive inner slices (for example, between two consecutive columns
-      *          in a column-major matrix).
-      *
-      * \sa innerStride(), rowStride(), colStride()
-      */
-    inline int outerStride() const
-    {
-      return derived().outerStride();
-    }
-
-    inline int stride() const
-    {
-      return IsVectorAtCompileTime ? innerStride() : outerStride();
-    }
-
-    /** \returns the pointer increment between two consecutive rows.
-      *
-      * \sa innerStride(), outerStride(), colStride()
-      */
-    inline int rowStride() const
-    {
-      return IsRowMajor ? outerStride() : innerStride();
-    }
-
-    /** \returns the pointer increment between two consecutive columns.
-      *
-      * \sa innerStride(), outerStride(), rowStride()
-      */
-    inline int colStride() const
-    {
-      return IsRowMajor ? innerStride() : outerStride();
-    }
-
     CommaInitializer<Derived> operator<< (const Scalar& s);
 
     template<unsigned int Added,unsigned int Removed>

Eigen/src/Core/Functors.h

@@ -290,7 +290,6 @@ struct ei_scalar_real_op {
   EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_real_op)
   typedef typename NumTraits<Scalar>::Real result_type;
   EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return ei_real(a); }
-  EIGEN_STRONG_INLINE result_type& operator() (Scalar& a) const { return ei_real_ref(a); }
 };
 template<typename Scalar>
 struct ei_functor_traits<ei_scalar_real_op<Scalar> >
@@ -306,12 +305,41 @@ struct ei_scalar_imag_op {
   EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_imag_op)
   typedef typename NumTraits<Scalar>::Real result_type;
   EIGEN_STRONG_INLINE result_type operator() (const Scalar& a) const { return ei_imag(a); }
-  EIGEN_STRONG_INLINE result_type& operator() (Scalar& a) const { return ei_imag_ref(a); }
 };
 template<typename Scalar>
 struct ei_functor_traits<ei_scalar_imag_op<Scalar> >
 { enum { Cost = 0, PacketAccess = false }; };
 
+/** \internal
+  * \brief Template functor to extract the real part of a complex as a reference
+  *
+  * \sa class CwiseUnaryOp, MatrixBase::real()
+  */
+template<typename Scalar>
+struct ei_scalar_real_ref_op {
+  EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_real_ref_op)
+  typedef typename NumTraits<Scalar>::Real result_type;
+  EIGEN_STRONG_INLINE result_type& operator() (const Scalar& a) const { return ei_real_ref(*const_cast<Scalar*>(&a)); }
+};
+template<typename Scalar>
+struct ei_functor_traits<ei_scalar_real_ref_op<Scalar> >
+{ enum { Cost = 0, PacketAccess = false }; };
+
+/** \internal
+  * \brief Template functor to extract the imaginary part of a complex as a reference
+  *
+  * \sa class CwiseUnaryOp, MatrixBase::imag()
+  */
+template<typename Scalar>
+struct ei_scalar_imag_ref_op {
+  EIGEN_EMPTY_STRUCT_CTOR(ei_scalar_imag_ref_op)
+  typedef typename NumTraits<Scalar>::Real result_type;
+  EIGEN_STRONG_INLINE result_type& operator() (Scalar& a) const { return ei_imag_ref(*const_cast<Scalar*>(&a)); }
+};
+template<typename Scalar>
+struct ei_functor_traits<ei_scalar_imag_ref_op<Scalar> >
+{ enum { Cost = 0, PacketAccess = false }; };
+
 /** \internal
   *
   * \brief Template functor to compute the exponential of a scalar

Eigen/src/plugins/CommonCwiseUnaryOps.h

@@ -43,13 +43,13 @@ typedef typename ei_meta_if<NumTraits<Scalar>::IsComplex,
                   >::ret RealReturnType;
 /** \internal the return type of real() */
 typedef typename ei_meta_if<NumTraits<Scalar>::IsComplex,
-                    CwiseUnaryView<ei_scalar_real_op<Scalar>, Derived>,
+                    CwiseUnaryView<ei_scalar_real_ref_op<Scalar>, Derived>,
                     Derived&
                   >::ret NonConstRealReturnType;
 /** \internal the return type of imag() const */
 typedef CwiseUnaryOp<ei_scalar_imag_op<Scalar>, Derived> ImagReturnType;
 /** \internal the return type of imag() */
-typedef CwiseUnaryView<ei_scalar_imag_op<Scalar>, Derived> NonConstImagReturnType;
+typedef CwiseUnaryView<ei_scalar_imag_ref_op<Scalar>, Derived> NonConstImagReturnType;
 
 #endif // not EIGEN_PARSED_BY_DOXYGEN