OP_REF           2010 ext/pcre/pcrelib/pcre_compile.c     case OP_REF:
OP_REF           5057 ext/pcre/pcrelib/pcre_compile.c              *previous == OP_REF ||
OP_REF           6861 ext/pcre/pcrelib/pcre_compile.c         *code++ = ((options & PCRE_CASELESS) != 0)? OP_REFI : OP_REF;
OP_REF           2655 ext/pcre/pcrelib/pcre_exec.c     case OP_REF:
OP_REF            378 ext/pcre/pcrelib/pcre_study.c     case OP_REF:
OP_REF            826 ext/pcre/pcrelib/pcre_study.c       case OP_REF: