template<typename T>
struct EventHandler {
    void pushEvent(T& ) {}
};
 
template<typename... EventHandlers>
struct _EventsHandler;
 
template<typename EventHandler>
struct _EventsHandler<EventHandler> : EventHandler
{
    using EventHandler::pushEvent;
};
 
template<typename EventHandler, typename... EventHandlers>
struct _EventsHandler<EventHandler, EventHandlers...> : EventHandler, _EventsHandler<EventHandlers...>
{
    using EventHandler::pushEvent;
    using _EventsHandler<EventHandlers...>::pushEvent;
};
 
using EventHandlerType = _EventsHandler<EventHandler<int>, EventHandler<float>, EventHandler<char>>;
 
int main()
{
    EventHandlerType test;
 
    int msp = 1;
    test.pushEvent(msp);
 
    return 0;
}
 

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