ONIG_OPTION_FIND_NOT_EMPTY  344 include/ruby/oniguruma.h #define ONIG_OPTION_NEGATE_SINGLELINE    (ONIG_OPTION_FIND_NOT_EMPTY     << 1)
ONIG_OPTION_FIND_NOT_EMPTY  321 regint.h       #define IS_FIND_NOT_EMPTY(option) ((option) & ONIG_OPTION_FIND_NOT_EMPTY)
ONIG_OPTION_FIND_NOT_EMPTY  323 regint.h                 (ONIG_OPTION_FIND_LONGEST | ONIG_OPTION_FIND_NOT_EMPTY))