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//@ run-pass
// 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);
}
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