Function class_add

components/ScriptModule-LUA/lua_tinker/lua_tinker.h:785–810

	// class init
	template<typename T>
	void class_add(lua_State* L, const char* name) 
	{ 
        // 通过类名设置类table
        // 如果该类没有注册，在lua中是获取不到类信息的
        class_name<T>::name(name);

        lua_newtable(L);

        lua_pushstring(L, "__name");
        lua_pushstring(L, name);
        lua_rawset(L, -3);

        lua_pushstring(L, "__index");
        lua_pushcclosure(L, meta_get, 0);
        lua_rawset(L, -3);

        lua_pushstring(L, "__newindex");
        lua_pushcclosure(L, meta_set, 0);
        lua_rawset(L, -3);

        lua_pushstring(L, "__gc");
        lua_pushcclosure(L, destroyer<T>, 0);
        lua_rawset(L, -3);

        lua_setglobal(L, name);
    }

	// Tinker Class Inheritence
	template<typename T, typename P>