Antlr4.Runtime.Tree.Trees._findAllNodes C# (CSharp) Method

        private static void _findAllNodes(IParseTree t, int index, bool findTokens, IList<IParseTree> nodes)
        {
            // check this node (the root) first
            if (findTokens && t is ITerminalNode)
            {
                ITerminalNode tnode = (ITerminalNode)t;
                if (tnode.Symbol.Type == index)
                {
                    nodes.Add(t);
                }
            }
            else
            {
                if (!findTokens && t is ParserRuleContext)
                {
                    ParserRuleContext ctx = (ParserRuleContext)t;
                    if (ctx.RuleIndex == index)
                    {
                        nodes.Add(t);
                    }
                }
            }
            // check children
            for (int i = 0; i < t.ChildCount; i++)
            {
                _findAllNodes(t.GetChild(i), index, findTokens, nodes);
            }
        }