| //@ run-pass |
| // Tests "transitivity" of super-builtin-kinds on traits. Here, if |
| // we have a Foo, we know we have a Bar, and if we have a Bar, we |
| // know we have a Send. So if we have a Foo we should know we have |
| // a Send. Basically this just makes sure rustc is using |
| // each_bound_trait_and_supertraits in type_contents correctly. |
| |
| |
| use std::sync::mpsc::{channel, Sender}; |
| |
| trait Bar : Send { } |
| trait Foo : Bar { } |
| |
| impl <T: Send> Foo for T { } |
| impl <T: Send> Bar for T { } |
| |
| fn foo<T: Foo + 'static>(val: T, chan: Sender<T>) { |
| chan.send(val).unwrap(); |
| } |
| |
| pub fn main() { |
| let (tx, rx) = channel(); |
| foo(31337, tx); |
| assert_eq!(rx.recv().unwrap(), 31337); |
| } |
