Luabind: derived classes!

Hello again,

Intro: The way I ve implemented Lua in my project is considering that the
API can be compiled with or witout Lua. To achieve this, I ve created a
dummy Script class, so I don't propagate lua in the entire project.

I did condensed my work a big deal, so here it is:

.cpp

 

Script *CreateScript(const Char *in_name, const Char *in_path)

{

        Script *l_script;

 

#if SUPPORT_LUA

        l_script = new LUA_Script();

#else

        l_script = new Script();

#endif

        return l_script;

}

 

class Object

{

        Object() {}

        void AddScript(Script *in_script);

        /// SNIP...

};

 

class Script: public Object

{

        /// SNIP...

};

 

class LUA_Script: public Script

{

        /// SNIP...

};

 

Luabind

 

Int Expose_Objects(lua_State* in_lua)

{

        module(in_lua)

        [

               def("CreateScript", &CreateScript)

               ,

               class_<Object>("Object")

               .def("AddScript", &Object::AddScript)

               ,

               class_<LUA_Script, Object>("Script")

               .def(constructor<>())

        ];

        return 0;

}

 

.lua

 

myScript = CreateScript("Test", "test.ai");

 

myObject = Object();

myObject:AddScript(myScript);

 



The bottleneck is right here:

if I do use new Script(); it will work but it won't have any Lua
functionalities.
when new LUA_Script(); is called I get:

No matching overload found, candidates:
void AddScript(Object&,Script*)

CreateScript creates a LUA_Script* and return a Script* but when passed in
myObject:AddScript(myScript); it is considered to be a LUA_Script wich it is
indeed. but there is no C++ match.

In pure C++ this would be legal but Luabind doesn't seem to like that at
all, any elegant way to make this work?

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