public FormulaNode()
{
key = string.Empty;
parent = null;
childs = new List <FormulaNode>();
type = FormulaNodeType.None;
}
public FormulaNode(string k, FormulaNode p, List <FormulaNode> list, FormulaNodeType t)
{
key = k;
parent = p;
childs = list;
type = t;
p.childs.Add(this);
}
