Method MoveNext

libpolys/polys/PolyEnumerator.h:81–107

Advances the position to the next term of the polynomial. returns true if the position marker was successfully advanced to the next term which can be used; false if the position marker has passed the end of the polynomial.

    /// false if the position marker has passed the end of the
    /// polynomial.
    virtual bool MoveNext()
    {
      assume( m_position != NULL );

      {
        const poly p_next = pNext(m_position);

        if (p_next != NULL) // not the last term?
        {
          m_position = p_next;
          assume( IsValid() );
          return true;
        }
      }

      if (m_position == &m_prevposition_struct) // -1 position?
      {
        assume( !IsValid() );
        m_position = m_poly;
        return (m_position != NULL);
      }

      // else: past the end (or an empty polynomial)
      m_position = NULL;
      assume( !IsValid() );
      return false;
    }
};