public override Tree Evaluate(Tree tree, TregexMatcher tregex)
{
int newIndex = Coindexer.GenerateIndex();
foreach (TsurgeonMatcher child in ChildMatcher)
{
Tree node = child.Evaluate(tree, tregex);
node.Label().SetValue(node.Label().Value() + CoindexationIntroductionString + newIndex);
}
return(tree);
}
/// <summary>
/// Returns null if one of the surgeries eliminates the tree entirely.
/// The operated-on tree is not to be trusted in this instance.
/// </summary>
public override Tree Evaluate(Tree tree, TregexMatcher tregex)
{
if (Coindexer != null)
{
Coindexer.SetLastIndex(tree);
}
foreach (TsurgeonMatcher child in ChildMatcher)
{
tree = child.Evaluate(tree, tregex);
if (tree == null)
{
return(null);
}
}
return(tree);
}
