Antlr4.Runtime.BufferedTokenStream.Consume C# (CSharp) Method

        public virtual void Consume()
        {
            bool skipEofCheck;
            if (p >= 0)
            {
                if (fetchedEOF)
                {
                    // the last token in tokens is EOF. skip check if p indexes any
                    // fetched token except the last.
                    skipEofCheck = p < tokens.Count - 1;
                }
                else
                {
                    // no EOF token in tokens. skip check if p indexes a fetched token.
                    skipEofCheck = p < tokens.Count;
                }
            }
            else
            {
                // not yet initialized
                skipEofCheck = false;
            }
            if (!skipEofCheck && LA(1) == IntStreamConstants.EOF)
            {
                throw new InvalidOperationException("cannot consume EOF");
            }
            if (Sync(p + 1))
            {
                p = AdjustSeekIndex(p + 1);
            }
        }