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void test() {
//  Free function works fine
//  auto d = make_delegate(&myFreeFunction);

//  But member methods will create an error
    A a;
    auto d = make_delegate(&A::simple, a);

    Service s;
    s.registerDelegate(d);
//  Error (active)  a reference of type "ServiceDelegate &" (not
//  const-qualified) cannot be initialized with a value of type
//  "dlgt::delegate<void (A::*)()>"

//  Error   C2664   'void Service::registerDelegate(ServiceDelegate &)': cannot
//  convert argument 1 from 'dlgt::delegate<void (__cdecl A::* )(void)>' to
//  'ServiceDelegate &'

    s.notifyDelegate();
}

template<typename return_type, typename... params>
class Delegate<return_type(params...) const>
        : public BaseDelegate<return_type, params...>
{
    typedef BaseDelegate<return_type, params...> Base;
public:
    Delegate(void* callee, typename Base::Pointer2Function function)
        : Base(callee, function)
    { }
};

    template<return_type(T::*Func)(params...) const>
    inline static Delegate<return_type(params...) const> CreateC(T* o)
    {
        return Delegate<return_type(params...) const>(o, &DelegateFactory::MethodCallerC<Func>);
    }

#ifndef _MSC_VER
template<typename return_type, typename... params>
class Delegate<return_type(params...) const>
        : public BaseDelegate<return_type, params...>
{
    typedef BaseDelegate<return_type, params...> Base;
public:
    Delegate(void* callee, typename Base::Pointer2Function function)
        : Base(callee, function)
    { }
};
#endif

#ifdef _MSC_VER
    template<return_type(T::*Func)(params...) const>
    inline static Delegate<return_type(params...)/* const*/> CreateC(T* o)
    {
        return Delegate<return_type(params...)/* const*/>(o, &DelegateFactory::MethodCallerC<Func>);
    }
#else
    template<return_type(T::*Func)(params...) const>
    inline static Delegate<return_type(params...) const> CreateC(T* o)
    {
        return Delegate<return_type(params...) const>(o, &DelegateFactory::MethodCallerC<Func>);
    }
#endif