mirror of https://github.com/rust-lang/rust
38 lines
628 B
Rust
38 lines
628 B
Rust
//@ 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);
|
|
}
|