class Module{
   ...
	protected:
	   void RegisterFonction(Callback2<ValueMap&, Command&> cb, const String& commandName){
	      handlers.Add(ToLower(commandName),cb);
	   }
	private:
	   ArrayMap<String, Callback2<ValueMap&, Command&>> handlers;
   ...
};
#define REGISTER(FonctionName) RegisterFonction((&CLASSNAME::FonctionName), #FonctionName);
class Info : public Module{
	public:
	   typedef Info CLASSNAME;


	   Info(TheBot& _bot) : Module(_bot){
		REGISTER(Uptime);
	   }
		
	   void Uptime(ValueMap& payload, Command& dispatched){
		   ...
	   }
};

error: no viable conversion from 'void (Upp::Info::*)(Upp::ValueMap &, Upp::Command &)' to 'Callback2<Upp::ValueMap &, Upp::Command &>' (aka 'CallbackN<Upp::ValueMap &, Upp::Command &>')

#define REGISTER(FonctionName) RegisterFonction([&](ValueMap& payload, Command& dispatched){FonctionName(payload,dispatched);}, #FonctionName);