What exactly is a unit node?

[LyTning94]

Recently I have stumbled across multiple places in the SDK where the following code (or something similar) is used:

CLLNode<IDInfo>* pUnitNode;
CvUnit* pLoopUnit;

pUnitNode = headUnitNode();

while (pUnitNode != NULL)
{
	pLoopUnit = ::getUnit(pUnitNode->m_data);
	pUnitNode = nextUnitNode(pUnitNode);
             ...
}

What exactly is a unit node, and how is it different from a UnitTypes or CvUnit* unit instance? I did some research, and found CvSelectionGroup::headUnitNode() and CvPlot::headUnitNode(). Could this be a way to loop through all units on a specific plot or in a specific group?

 

[deanej]

Looks like a linked list of units. No idea what this particular linked list transversal is doing though without more code visible.