allow_zero       1114 ext/pcre/pcrelib/pcre_exec.c     allow_zero = FALSE;
allow_zero       1189 ext/pcre/pcrelib/pcre_exec.c       if (allow_zero || matched_once)
allow_zero       1216 ext/pcre/pcrelib/pcre_exec.c     allow_zero = FALSE;
allow_zero       1252 ext/pcre/pcrelib/pcre_exec.c     if (matched_once || allow_zero)
allow_zero       1883 ext/pcre/pcrelib/pcre_exec.c     allow_zero = TRUE;