/** <summary>
* For every node in this subtree, make sure it's start/stop token's
* are set. Walk depth first, visit bottom up. Only updates nodes
* with at least one token index < 0.
* </summary>
*/
public virtual void SetUnknownTokenBoundaries()
{
if (Children == null)
{
if (startIndex < 0 || stopIndex < 0)
{
startIndex = stopIndex = Token.TokenIndex;
}
return;
}
foreach (ITree childTree in Children)
{
CommonTree commonTree = childTree as CommonTree;
if (commonTree == null)
{
continue;
}
commonTree.SetUnknownTokenBoundaries();
}
if (startIndex >= 0 && stopIndex >= 0)
{
return; // already set
}
if (Children.Count > 0)
{
ITree firstChild = Children[0];
ITree lastChild = Children[Children.Count - 1];
startIndex = firstChild.TokenStartIndex;
stopIndex = lastChild.TokenStopIndex;
}
}
