template<class classT, typename ...method_arg_types>
class func2;

template<class classT, typename ...method_arg_types>
func2<classT, method_arg_types...>
func(classT *instance, void(classT::*method)(method_arg_types...))
{
    return func2<classT, method_arg_types...>(instance, method);
}

template<class classT, typename ...method_arg_types>
class func2 {
    friend func2<classT, method_arg_types...> func<classT, method_arg_types...>(classT *instance, void(classT::*method)(method_arg_types...));
public:
    using method_type = void(classT::*)(method_arg_types...);

    func2(classT *instance, method_type method)
        : m_instance(instance), m_method(method)
    {
    }

    void operator()(method_arg_types&& ...method_args) {
        (m_instance->*m_method)(std::forward(method_args...));
    };

private:
    method_type m_method;
    classT *m_instance;
};