RECC_XDIGIT      1574 src/regex-emacs.c     if (!memcmp (beg, "xdigit", 6))    return RECC_XDIGIT;
RECC_XDIGIT      1607 src/regex-emacs.c     case RECC_XDIGIT: return ISXDIGIT (ch) != 0;
RECC_XDIGIT      1638 src/regex-emacs.c     case RECC_ASCII: case RECC_DIGIT: case RECC_XDIGIT: case RECC_CNTRL: