[rustc.git] / src / test / ui / builtin-superkinds / builtin-superkinds-capabilities.rs

// 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);
}
Commit	Line	Data
416331ca	1	// run-pass
1a4d82fc JJ	2	// Tests "capabilities" granted by traits that inherit from super-
	3	// builtin-kinds, e.g., if a trait requires Send to implement, then
	4	// at usage site of that trait, we know we have the Send capability.
	5
c34b1796	6
1a4d82fc JJ	7	use std::sync::mpsc::{channel, Sender, Receiver};
	8
	9	trait Foo : Send { }
	10
	11	impl <T: Send> Foo for T { }
	12
85aaf69f	13	fn foo<T: Foo + 'static>(val: T, chan: Sender<T>) {
1a4d82fc JJ	14	chan.send(val).unwrap();
	15	}
	16
	17	pub fn main() {
c34b1796	18	let (tx, rx): (Sender<isize>, Receiver<isize>) = channel();
85aaf69f	19	foo(31337, tx);
62682a34	20	assert_eq!(rx.recv().unwrap(), 31337);
1a4d82fc	21	}