PCRE_MATCH_EMPTY 9579 ext/pcre/pcrelib/pcre_compile.c     re->flags |= PCRE_MATCH_EMPTY;
PCRE_MATCH_EMPTY  236 ext/pcre/pcrelib/pcre_fullinfo.c   *((int *)where) = (re->flags & PCRE_MATCH_EMPTY) != 0;