1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
|
//@ build-pass
#![allow(dead_code)]
#![allow(unused_variables)]
use std::any::TypeId;
use std::rc::Rc;
type Fp<T> = Rc<T>;
struct Engine;
trait Component: 'static {}
impl Component for Engine {}
trait Env {
fn get_component_type_id(&self, type_id: TypeId) -> Option<Fp<dyn Component>>;
}
impl<'a> dyn Env + 'a {
fn get_component<T: Component>(&self) -> Option<Fp<T>> {
let x = self.get_component_type_id(TypeId::of::<T>());
None
}
}
trait Figment {
fn init(&mut self, env: &dyn Env);
}
struct MyFigment;
impl Figment for MyFigment {
fn init(&mut self, env: &dyn Env) {
let engine = env.get_component::<Engine>();
}
}
fn main() {}
|
