public string ToIndent()
{
Action<Node> na;
Action<List<Node>> nsa = null;
const string ind = " ";
FList<string> inds = new FList<string>();
StringBuilder b = new StringBuilder();
na = delegate(Node n)
{
if (n.Leaf != null)
{
b
.Append(inds.Deriv(Cty.ToLine))
.Append(n.Leaf)
.AppendLine();
}
else if (n.Branches != null)
{
if (n != this) inds.Add(ind);
nsa(n.Branches);
if (n != this) inds.RemoveAt(inds.Count - 1);
}
};
nsa = delegate(List<Node> ns)
{
if (ns.Count == 0) return;
bool isPrevBranch = ns[0].Branches != null;
na(ns[0]);
for (int i = 1; i < ns.Count; i++)
{
if (isPrevBranch && ns[i].Branches != null)
{
b
.Append(inds.Deriv(Cty.ToLine))
.Append(ind)
.AppendLine();
}
isPrevBranch = ns[i].Branches != null;
na(ns[i]);
}
};
na(this);
return b.ToString();
}