Hyena.Query.QueryListNode.AddChild C# (CSharp) Method

        public void AddChild(QueryNode child)
        {
            child.Parent = this;
            children.Add(child);
        }

        void ParseToken(QueryToken token)
        {
            switch (token.ID)
            {
            case TokenID.OpenParen:
                DepthPush();
                break;

            case TokenID.CloseParen:
                DepthPop();
                break;

            case TokenID.Not:
                NodePush(new QueryListNode(Keyword.Not));
                break;

            case TokenID.Or:
            case TokenID.And:
                // Only push a node if the current_parent is not the same as this token
                if (current_parent.Keyword == Keyword.Not ||
                    current_parent.Keyword == (token.ID == TokenID.Or ? Keyword.And : Keyword.Or))
                {
                    var list = new QueryListNode(token.ID == TokenID.Or ? Keyword.Or : Keyword.And);
                    var p    = current_parent.Parent;

                    if (p != null)
                    {
                        current_parent.Parent.RemoveChild(current_parent);
                    }

                    if (current_parent.Keyword == Keyword.Not || current_parent.ChildCount > 1)
                    {
                        list.AddChild(current_parent);
                    }
                    else
                    {
                        list.TakeChildren(current_parent);
                    }

                    current_parent = p;
                    NodePush(list);
                }
                break;

            case TokenID.Term:
                NodePush(QueryTermNode.ParseUserQuery(field_set, token.Term));
                break;
            }
        }