sub refaddr_pp {
    return if not ref $_[0];
    if (    exists $INC{'overload.pm'}  
         && overload::Overloaded($_[0]) ) {
        overload::StrVal($_[0]) =~ /0x(\w+)/;
        return hex $1;
    }
    else {
        return 0 + $_[0];
    }
}