private static T _assemble <T>(IEnumerable <Tuple <NodeIndex, T> > dic, Action <T, T> addAction)
{
var seq = dic.OrderBy(x => x.Item1, Tree.NodeIndex.GetPostorderComparer());
var vst = new ElementScroller <Tuple <NodeIndex, T> >(seq);
foreach (var tr in vst.GetSequence())
{
vst.MoveTo(tr)
.MaybeNext(x => tr.Item1.CurrentDepth > x.Item1.CurrentDepth)
.TrueOrNot(r => addAction(r.Current.Item2, tr.Item2));
}
return(vst.Current.Item2);
}
private static U convert <T, U>(T self, Func <T, U> generator, Action <U, U> addAction)
where T : IReadOnlyTreeNode <T>
{
if (generator == null)
{
throw new ArgumentNullException("generator");
}
if (addAction == null)
{
throw new ArgumentNullException("addAction");
}
var t = self.Postorder().Select(x => Tuple.Create(x, generator(x)));
var vst = new ElementScroller <Tuple <T, U> >(t);
foreach (var tr in vst.GetSequence())
{
vst.MoveTo(tr)
.MaybeNext(x => x.Item1.Children.Contains(tr.Item1))
.TrueOrNot(r => addAction(r.Current.Item2, tr.Item2));
}
return(vst.Current.Item2);
}