gistfile1.txt

struct ContainerFoo(i32, i32);

struct ContainerBar(i64, i64);

trait Contains {
    type A;
    type B;

    fn contains(&self, &Self::A, &Self::B) -> bool;
}

impl Contains for ContainerFoo {
    type A = i32;
    type B = i32;

    fn contains(&self, number_1: &i32, number_2: &i32) -> bool {
        (&self.0 == number_1) && (&self.1 == number_2)
    }
}

impl Contains for ContainerBar {
    type A = i64;
    type B = i64;

    fn contains(&self, number_1: &i64, number_2: &i64) -> bool {
        (&self.0 == number_1) && (&self.1 == number_2)
    }
}

struct FooBar<'a, Ta: 'a, Tb: 'a> {
  pub container: &'a Contains<A=Ta, B=Tb>,
}

fn main() {
    let number_1 = 3;
    let number_2 = 10;

    let foobar = FooBar {
      container: &ContainerFoo(number_1, number_2),
    };

    println!("Does container contain {} and {}: {}",
        &number_1, &number_2,
        foobar.container.contains(&number_1, &number_2));
}