| // Tests "capabilities" granted by traits that inherit from super- |
| // builtin-kinds, e.g., if a trait requires Send to implement, then |
| // at usage site of that trait, we know we have the Send capability. |
| |
| |
| use std::sync::mpsc::{channel, Sender, Receiver}; |
| |
| trait Foo : Send { } |
| |
| impl <T: Send> Foo for T { } |
| |
| fn foo<T: Foo + 'static>(val: T, chan: Sender<T>) { |
| chan.send(val).unwrap(); |
| } |
| |
| pub fn main() { |
| let (tx, rx): (Sender<isize>, Receiver<isize>) = channel(); |
| foo(31337, tx); |
| assert_eq!(rx.recv().unwrap(), 31337); |
| } |
