public static Parser <TToken, IEnumerable <T> > Repeat <TToken, T>(
            this Parser <TToken, T> parser,
            int count)
        {
            /*
             * return InternalCombinator.Repeat(parser, count)
             *       .Select(delayedSeq => delayedSeq.AsEnumerable());
             */

            return(InternalCombinator.Repeat_Optimized(parser, count));
        }