Re: add_dependency assert problem

thanks for Ryan Pavlik reply.
define virtual destructor in class base can't resolve this problem.

i am not know the luabind-inside work well, it looks like luabind hold the
'object_rep'(b.member), every time call the b.member in lua will use the
same 'object_rep'. so the m_dependency_cnt is overflow.
how should i avoid it ? (not define the base print function with 'virtual'
or remove any one('derived_warp', 'base') in the ' class_<derived,
derived_warp, base>("derived") ' well be ok, but the "derived" in lua will
not meet my needs)

------------------------------
>
> Message: 6
> Date: Wed, 17 Aug 2011 09:52:45 -0500
> From: Ryan Pavlik <[email protected]>
> Subject: Re: [luabind] add_dependency assert problem
> To: [email protected]
> Message-ID:
>        <CABMFTE8-AJ+ha34QWd+xAKRJZrv72wGEEg=ZyGVyfzD=vddcQg@mail.gmail.com
> >
> Content-Type: text/plain; charset="utf-8"
>
> Try this: Define a virtual destructor in class base. It can be trivial:
> that
> is, ~base() {}
>
>
> On Wed, Aug 17, 2011 at 5:22 AM, ? <[email protected]> wrote:
>
> > hi, all:
> >
> > i get *assertion* error in *object_rep*.cpp -- "assert(m_dependency_cnt <
> > sizeof(object_rep));" when i use luabind like this example:
> >
> > ----------------------
> >
> > class base
> > {
> > public:
> >     virtual void print() {}             // if not use 'virtual', the
> > m_dependency_cnt will not bigger than sizeof(object_rep)
> > };
> >
> > class derived : public base {};
> > class derived_wrap : public derived, public wrap_base {};
> >
> > class holder
> > {
> > public:
> >     base* member;
> >
> >     holder(base* p) : member(p) {}
> > };
> >
> > module(L)
> > [
> >     class_<base>("base")
> >         .def(constructor<>())
> >         .def("print", &base::print),
> >
> >     class_<derived, derived_wrap, base>("derived")    // i want the
> > "derived" in lua can be derived and also have base class "print" function
> >         .def(constructor<>()),
> >
> >     class_<holder>("holder")
> >         .def(constructor<base*>())
> >         .def_readonly("member", &holder::member)
> > ];
> >
> > luaL_dostring(L,
> >     "a = derived() "
> >     "b = holder(a) "
> >     "for i = 1, 100 do "
> >     "    b.member:print() "
> >     "end "
> > );
> >
> > ----------------------
> >
> > any ideas? thanks in advance
> >
> > onlyfeng
> > [email protected]
> >
> >
> >
> >
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>
> --
> Ryan Pavlik
> HCI Graduate Student
> Virtual Reality Applications Center
> Iowa State University
>
> [email protected]
> http://academic.cleardefinition.com
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