check_next        203 lib/lua/llex.c   if (check_next(ls, "Ee"))  /* `E'? */
check_next        204 lib/lua/llex.c     check_next(ls, "+-");  /* optional exponent sign */
check_next        402 lib/lua/llex.c         if (check_next(ls, ".")) {
check_next        403 lib/lua/llex.c           if (check_next(ls, "."))