dynamic dispatch - rust

lib.rs

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mod routing_table;
use std::marker::MarkerTrait;

trait Facade {
  fn add(&mut self)->u32;
  }

struct RoutingNode<'a> {
facade: &'a mut (Facade + 'a),
}

impl<'a> RoutingNode<'a> {
  fn new(my_facade: &'a mut Facade) -> RoutingNode<'a> {
    RoutingNode { facade: my_facade }
  }

  fn get_foo(&'a mut self) -> &'a mut Facade {
    self.facade
  }
  fn add(mut self)->u32 {
     self.facade.add()

  }
}




#[test]
fn facade_implementation() {

  struct MyFacade;
  
  impl Facade for MyFacade {
    fn add(&mut self)->u32 {
      999u32
      }
    } 
  let mut my_facade = MyFacade;
  let mut my_routing = RoutingNode::new(& mut my_facade as & mut Facade);
  assert_eq!(999, my_routing.get_foo().add()); 
}