Method getNextBox

Exercises/NoModules/Chapter 19/Soln19_05/Truckload.cpp:80–88

Only thing we changed was adding "Iterator::" to the member's qualification

// Only thing we changed was adding "Iterator::" to the member's qualification
SharedBox Truckload::Iterator::getNextBox()
{
  if (!m_current)                                 // If there's no current...
    return getFirstBox();                         // ...return the 1st Box

  m_current = m_current->m_next;                  // Move to the next package

  return m_current? m_current->m_box : nullptr;   // Return its box (or nullptr...).
}

void Truckload::addBox(SharedBox box)
{