Function outer

include/Eigen/src/SparseCore/SparseBlock.h:450–452

    return EvalIterator::index() - convert_index<StorageIndex>(XprIsRowMajor ? m_block.startCol() : m_block.startRow());
  }
  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(); }