C++11 variadic template parameter expansion

I would like to do the following:

template<typename Func>
class FunctionWrapper
{
public:
    typedef decltype(Func()) ReturnType;
    typedef ... ArgsType;

    FunctionWrapper(Func func)
    {
        func_ = func;
    }

    ReturnType operator() (ArgsType args)
    {
        return func_(args);
    }
private:
    Func func_;
};

The problem is I don't know how to deduce the ArgsType from Func type. I'd like to make it work when the function returns/accepts nothing as well.

The usecase would then be:

FunctionWrapper<myFunction> wrapper;
auto result = wrapper(1, 2, 3);