alt_num          3369 ext/mbstring/oniguruma/regcomp.c   int r, n, len, alt_num;
alt_num          3383 ext/mbstring/oniguruma/regcomp.c   alt_num = 1;
alt_num          3419 ext/mbstring/oniguruma/regcomp.c       alt_num *= (n + 1);
alt_num          3420 ext/mbstring/oniguruma/regcomp.c       if (alt_num > THRESHOLD_CASE_FOLD_ALT_FOR_EXPANSION) break;