ONIG_SYN_OP_DECIMAL_BACKREF  667 regint.h          ONIG_SYN_OP_DECIMAL_BACKREF | \
ONIG_SYN_OP_DECIMAL_BACKREF  674 regint.h           ONIG_SYN_OP_POSIX_BRACKET | ONIG_SYN_OP_DECIMAL_BACKREF | \
ONIG_SYN_OP_DECIMAL_BACKREF 3410 regparse.c           if (IS_SYNTAX_OP(syn, ONIG_SYN_OP_DECIMAL_BACKREF) && 
ONIG_SYN_OP_DECIMAL_BACKREF   91 regsyntax.c        ONIG_SYN_OP_QMARK_ZERO_ONE | ONIG_SYN_OP_DECIMAL_BACKREF |
ONIG_SYN_OP_DECIMAL_BACKREF  114 regsyntax.c        ONIG_SYN_OP_ESC_LTGT_WORD_BEGIN_END | ONIG_SYN_OP_DECIMAL_BACKREF )