C++ templates, need fresh eyes

[Guppy]

template <typename T,int (T::*memberFunction) (lua_State *L)>
class luaMemberFunction: public luaType{
 public:
	 luaMemberFunction(T* _objectPtr):objectPtr(_objectPtr){}
	 virtual void push() {
		 lua_pushlightuserdata( Leadwerks::Interpreter::L, objectPtr );
		 lua_pushcclosure(Leadwerks::Interpreter::L,forwarder,1);
	 }
	 T* objectPtr;
	 static int forwarder(lua_State *L){
		 //return ((T*)lua_touserdata( L, lua_upvalueindex(1) ))->*memberFunction(L);
		 return ((T*)lua_touserdata( L, lua_upvalueindex(1) )).*memberFunction(L);
	 }
};

 

called else where as

luaType temp= new luaMemberFunction<eventForwarder,&eventForwarder::testMemberFunction>(this);

 

produces this error

 

../../Source/util/lua_tablehelper.h|91|error: must use ‘.*’ or ‘->*’ to call pointer-to-member function in ‘&MyGUI::eventForwarder::testMemberFunction (...)’, e.g. ‘(... ->* &MyGUI::eventForwarder::testMemberFunction) (...)’|

 

As you can properly tell from the comment above I've tried both - I feel like I'm missing something obvious but after two hours of starting at the code I'm still at a loss.

[Guppy]

It should be

return (((T*)lua_touserdata( L, lua_upvalueindex(1) ))->*memberFunction)(L); 

 

I'd like to thank the forum for playing the part of rubber duck