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
|
// run-pass
#![allow(non_camel_case_types)]
#![allow(dead_code)]
struct pair<A,B> {
a: A, b: B
}
trait Invokable<A> {
fn f(&self) -> (A, u16);
}
struct Invoker<A> {
a: A,
b: u16,
}
impl<A:Clone> Invokable<A> for Invoker<A> {
fn f(&self) -> (A, u16) {
(self.a.clone(), self.b)
}
}
fn f<A:Clone + 'static>(a: A, b: u16) -> Box<dyn Invokable<A>+'static> {
Box::new(Invoker {
a: a,
b: b,
}) as Box<dyn Invokable<A>+'static>
}
pub fn main() {
let (a, b) = f(22_u64, 44u16).f();
println!("a={} b={}", a, b);
assert_eq!(a, 22u64);
assert_eq!(b, 44u16);
}
|
