Re: return_stl_iterator acting as const?

That didn't seem to do it.  To be clear from my example the class itself
does appear to be acting as a ref, however the STL container contained
WITHIN it seems to being copied to the lua object and *IT* isn't acting as a
reference.

On Mon, Mar 2, 2009 at 2:04 PM, Kristoffer Danielsson <
[email protected]> wrote:

>  If I remember correctly... use boost::ref() on the variables in your call
> to function_call:
>
> function_call(boost::ref(myVar));
>
> ------------------------------
> Date: Mon, 2 Mar 2009 01:09:27 -0800
> From: [email protected]
> To: [email protected]
> Subject: [luabind] return_stl_iterator acting as const?
>
>
> Greetings all,
>
> I'm having a problem setting the value of a class contained within a
> std::vector from lua, I have the following code:
>
> C++:
> class ContainedObject
> {
> public:
>     int value;
> };
>
> class ContainerObject
> {
> public:
>     std::vector<ContainedObject> vec;
>     int containervalue;
> };
>
>
> luabind::module(L)
> [
>     luabind::class<ContainedObject>("ContainedObject")
>     .def(luabind::constructor<>())
>     .def_readwrite("value", &ContainedObject::value),
>
>     luabind::class_<ContainerObject>("ContainerObject")
>     .def_readwrite("containervalue",    &ContainerObject::containervalue)
>     .def_readwrite("vec",            &ContainerObject::vec,
> luabind::return_stl_iterator)
> ];
>
> ContainerObject cont;
> ContainedObject Obj;
>
> Obj.value = 10;
>
> cont.push_back(Obj);
> cont.containervalue = 15;
>
> luabind::call_function<void>(L, "LuaFunction", &cont);
>
> std::cout << cont.containervalue << std::endl;
> std::cout << cont.vec[0].value << std::endl;
>
>
>
> Lua code:
> function LuaFunction( cont )
>     print (cont.containervalue)
>     cont.containervalue = 30
>     for things in cont.vec
>     do
>         print (things.value)
>         things.vlaue = 5
>     end
> end
>
>
> Which prints out:
> 15
> 10
> 30
> 10
> So I am able to modify the containervalue of ContainerObject, but I am not
> able to modify the ContainedObject value.  Any thoughts here?  Is luabind
> making a copy of the vector as it passes it off?  If so is there a by
> reference way possible?
>
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