ANCHOR_WORD_END  1421 ext/mbstring/oniguruma/regcomp.c   case ANCHOR_WORD_END:       r = add_opcode(reg, OP_WORD_END);       break;
ANCHOR_WORD_END  6172 ext/mbstring/oniguruma/regcomp.c     case ANCHOR_WORD_END:        fputs("word end", f);       break;
ANCHOR_WORD_END  3262 ext/mbstring/oniguruma/regparse.c       tok->u.anchor = ANCHOR_WORD_END;