public virtual object SingleElement()
{
if (1 != Size())
{
throw new InvalidOperationException();
}
return(_tree.Key());
}
public override int Compare(Tree tree)
{
return _function.Compare(_object, tree.Key());
}
public override int Compare(Tree tree)
{
return(_function.Compare(_object, tree.Key()));
}
protected override object CurrentValue(Tree tree)
{
return tree.Key();
}
public void Visit(object obj)
{
Tree tree = (Tree)obj;
visitor.Visit(tree.Key());
}
protected override object CurrentValue(Tree tree)
{
return(tree.Key());
}