ONIG_OPTIMIZE_EXACT_IC 4894 ext/mbstring/oniguruma/regcomp.c     reg->optimize = ONIG_OPTIMIZE_EXACT_IC;
ONIG_OPTIMIZE_EXACT_IC 3140 ext/mbstring/oniguruma/regexec.c   case ONIG_OPTIMIZE_EXACT_IC:
ONIG_OPTIMIZE_EXACT_IC 3263 ext/mbstring/oniguruma/regexec.c   case ONIG_OPTIMIZE_EXACT_IC: