Pass a function to an object as creation parameter

I am creating an object of tesla, that comes from the struct of Car.

The way each car gets energy to work is different, in the case of a Tesla, we plug in a cable and pass electricity, in the case of a Honda, we insert oil into a tank. I want my car struct to have a property of get_energy with a Fn datatype, so that when I create a new car I can pass in a function that will be called when I call tesla.get_energy()… the creation of tesla would ideally be something like let tesla = Car(get_energy: || => {grab_cable(), insert_cable(), pass_electricty()}) which would look different from the creation of a Honda. Can I somehow do that?

>Solution :

For the love of god I hope I’m not answering an undergrad’s homework.

But assuming good faith, this is my approach. I would probably store that function/closure and box it. It will look like this.

struct Foo {
    pub foo: Box<dyn Fn(usize) -> usize>,
}

impl Foo {
    fn new(foo: impl Fn(usize) -> usize + 'static) -> Self {
        Self { foo: Box::new(foo) }
    }
}

fn main() {
    let foo = Foo {
        foo: Box::new(|a| a + 1),
    };
    (foo.foo)(42);
    
    (Foo::new(|a| a + 1).foo)(42);
}

I of course stole it from here How do I store a closure in a struct in Rust?. Not going to flag the question yet because I’m not used to stackoverflow.