matrix_ref.h

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#ifndef OPEN_WALKER_CORE_MATRIX_REF_H
#define OPEN_WALKER_CORE_MATRIX_REF_H

#include <Eigen/Dense>

namespace ow_core
{
template <typename _Derived, int _Rows, int _Cols>
class MatrixRef : public Eigen::Block<_Derived, _Rows, _Cols>
{
public:
  typedef _Derived Derived;

  enum
  {
    Rows = _Rows,
    Cols = _Cols,
  };

  typedef Eigen::Block<Derived, Rows, Cols> Base;

public:
  explicit MatrixRef(Derived& ref, int startRow = 0, int startCol = 0) : 
    Base(ref, startRow, startCol)
  {
  }

  using Base::operator=;

  std::string toString() const
  {
    std::ostringstream out;
    out << *this;
    return out.str();
  }

private:
  MatrixRef();
};

}  // namespace ow_core

#endif  // OPEN_WALKER_CORE_MATRIX_REF_H