Function col

include/Eigen/Eigen/src/SparseCore/SparseBlock.h:487–487

  inline Index outer()  const { return EvalIterator::outer() - (XprIsRowMajor ? m_block.startRow() : m_block.startCol()); }
  inline Index row()    const { return EvalIterator::row()   - m_block.startRow(); }
  inline Index col()    const { return EvalIterator::col()   - m_block.startCol(); }

  inline operator bool() const { return EvalIterator::operator bool() && EvalIterator::index() < m_end; }
};