Code shared from the Rust Playground

playground.rs

pub trait Point{
    type Identifier: PartialEq;

    fn id(&self) -> Self::Identifier;
}

#[derive(Debug)]
pub struct Connection<T: Point> {
    pub to: T
}

impl<T: Point> Connection<T> {
    pub fn is_connected_to(&self, point: T) -> bool
    {
        self.to.id() == point.id()
    }
}


pub fn main() {
    #[derive(Debug)]
	struct SimplePoint;
	impl Point for SimplePoint{
	    type Identifier = char;
	    
	    fn id(&self) -> char { return 'A' }
	}
	
	let a = SimplePoint {};
	
	let conn = Connection {
	    to: a
	};
	
    println!("conn: {:?}", conn);
}