Unique pointer and a vector in the class constructor

Hello,

I was mildly surprised when I realized that I cannot initialize the vector directly like in the commented out command, but have to use a default constructor. Surprised because initialization directly via the constructor (i.e. without a unique pointer) works fine. I am doing this right, or is there a better way? Because doing it this way on a class with many vectors bloats the code.

Code:

---

#include <iostream>
#include <memory>
#include <vector>

struct Gauge
{
    std::vector<int> Dial;
    Gauge() = default;
    Gauge(std::vector<int> dial) : Dial(dial) {}
};

int main ()
{
    // auto gauge = std::make_unique<Gauge> ({1,2});
    auto gauge = std::make_unique<Gauge> ();
    gauge->Dial = {1,2};
    std::cout << gauge->Dial[0] << '\n';
}

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I think you may need a std::initializer_list constructor to do that. If you don't go that route, what about:

Code:

---

auto gauge = std::make_unique<Gauge>(std::vector{1, 2});

---

But an initializer_list constructor might be better so as to not expose the internals of the class... but you already have the member variable as public so it might not matter.

Yes, this works! Thank you!