RECC_LOWER       1566 src/regex-emacs.c     if (!memcmp (beg, "lower", 5))     return RECC_LOWER;
RECC_LOWER       1602 src/regex-emacs.c     case RECC_LOWER: return ISLOWER (ch) != 0;
RECC_LOWER       1631 src/regex-emacs.c     case RECC_LOWER: return BIT_LOWER;