doc and use sed to clean the class hierarchy instead of

preprocessor directives.

Eigen/src/Sparse/HashMatrix.h

@@ -43,11 +43,7 @@ struct ei_traits<HashMatrix<_Scalar, _Flags> >
 // TODO reimplement this class using custom linked lists
 template<typename _Scalar, int _Flags>
 class HashMatrix
-#ifndef EIGEN_PARSED_BY_DOXYGEN
   : public SparseMatrixBase<HashMatrix<_Scalar, _Flags> >
-#else
-  : public SparseMatrixBase
-#endif
 {
   public:
     EIGEN_GENERIC_PUBLIC_INTERFACE(HashMatrix)

Eigen/src/Sparse/LinkedVectorMatrix.h

@@ -53,11 +53,7 @@ struct LinkedVectorChunk
 
 template<typename _Scalar, int _Flags>
 class LinkedVectorMatrix
-#ifndef EIGEN_PARSED_BY_DOXYGEN
   : public SparseMatrixBase<LinkedVectorMatrix<_Scalar,_Flags> >
-#else
-  : public SparseMatrixBase
-#endif
 {
   public:
     EIGEN_GENERIC_PUBLIC_INTERFACE(LinkedVectorMatrix)

Eigen/src/Sparse/SparseMatrix.h

@@ -53,11 +53,7 @@ struct ei_traits<SparseMatrix<_Scalar, _Flags> >
 
 template<typename _Scalar, int _Flags>
 class SparseMatrix
-#ifndef EIGEN_PARSED_BY_DOXYGEN
   : public SparseMatrixBase<SparseMatrix<_Scalar, _Flags> >
-#else
-  : public SparseMatrixBase
-#endif
 {
   public:
     EIGEN_GENERIC_PUBLIC_INTERFACE(SparseMatrix)

Eigen/src/Sparse/SparseProduct.h

@@ -88,11 +88,7 @@ struct ei_traits<Product<LhsNested, RhsNested, SparseProduct> >
 };
 
 template<typename LhsNested, typename RhsNested> class Product<LhsNested,RhsNested,SparseProduct> : ei_no_assignment_operator,
-#ifndef EIGEN_PARSED_BY_DOXYGEN
   public MatrixBase<Product<LhsNested, RhsNested, SparseProduct> >
-#else
-  public MatrixBase
-#endif
 {
   public: