Is it possible to pass a set of values to a variadic template declaration similar to how the fibonacci series is solved

I am looking for a solution with templates which allows me to pass values as template parameters just like its done by specializing templates with particular data types. For ex.

template <std::string... Args>
struct MOptional
{
    MOptional()
    {
        possibilities.push_back(std::forward(Args)...);
    }

    std::vector<std::string> possibilities;
};

The way I want to use it is something like this.

MOptional<"string1", "string2", "string3"> optional;

and so the possibilities field in the class should get auto populated with string1,string2 and string3. I know I could do it with a constructor but I am looking for something like the above. I would like the number of strings to be variable.

Obviously this code doesn't compile but just to convey how I want it...

Any Ideas ?