Re: Multiple namespaces are working now, was Re: [Wxlua-users] wxLua packaging

[John L. <jla...@gm...>]

On 2/14/06, klaas.holwerda <kho...@xs...> wrote:
> >>But this does not work, when run from the run script menu, it still
> >>calls function that are wrong.
> >
> >I've changed wxluacan to use the "wxluacan" namespace and everything
> >seems to work properly. Please let me know if there are other
> >problems.
> >
> I did update from cvs, and in the wxluacan sample in the menu ->
> ModifyObjects->Run Script.
> And you run the script in wxCanlua.acripts/incircles.lua.
>
> I get still the same error:
> attempt to call field `getCan` ( a nil value ).
> Do you not get this?

No, it works on two different machines in MSW and Linux. It adds some
rects and an ellipse. Try doing another checkout maybe?

> >I also changed the interface file and removed %delete for the classes.
> >It's meant only for classes that lua itself will delete, like wxColour
> >for example.
> >
> But what if both can happen? Can an object not be created in lua and/or C=
++?
> Like here i can imagine one wants to create a wxlCan in lua script, and
> add objects to it in lua.
> But in the sample it is all added to C++ instead.

Well, you can always remove the pointers from the wxLuaState, but
that's not so elegant.

> >If I
> >understand correctly the c++ AddObject function takes ownership of the
> >pointer and deletes it in the destructor.
> >
> Yes, as i say, i can imagine that for a class both can happen.
> I would say this is a perfect use of smart pointers. In that case Lua
> and C++ can hold a smrtPtr to the object, who releases it last will
> delete the object.
> So making the wxLuaState::m_pTrackedList a smart pointer list, will
> already solve it.
> Since then i would use for say the object in a canvas smart pointers
> too, and all will be fine, no matter if Lua or C++ releases its smrtPtr
> to the object first.
> I think  it would make thinks easier.

I'm still a little sketchy about smart pointers. Does the template
code work in MSVC 6? The last I tried templates VC6 couldn't handle
them and I gave up.

Your smart pointer class is just a single header file right?

Regards,
    John Labenski