Antlr4.Runtime.ListTokenSource.NextToken C# (CSharp) Method

        public virtual IToken NextToken()
        {
            if (i >= tokens.Count)
            {
                if (eofToken == null)
                {
                    int start = -1;
                    if (tokens.Count > 0)
                    {
                        int previousStop = tokens[tokens.Count - 1].StopIndex;
                        if (previousStop != -1)
                        {
                            start = previousStop + 1;
                        }
                    }
                    int stop = Math.Max(-1, start - 1);
                    eofToken = _factory.Create(Tuple.Create((ITokenSource)this, InputStream), TokenConstants.EOF, "EOF", TokenConstants.DefaultChannel, start, stop, Line, Column);
                }
                return eofToken;
            }
            IToken t = tokens[i];
            if (i == tokens.Count - 1 && t.Type == TokenConstants.EOF)
            {
                eofToken = t;
            }
            i++;
            return t;
        }