| // Copyright 2013 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // 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::comm::{channel, Sender}; |
| |
| trait Bar : Send { } |
| trait Foo : Bar { } |
| |
| impl <T: Send> Foo for T { } |
| impl <T: Send> Bar for T { } |
| |
| fn foo<T: Foo>(val: T, chan: Sender<T>) { |
| chan.send(val); |
| } |
| |
| pub fn main() { |
| let (tx, rx) = channel(); |
| foo(31337i, tx); |
| assert!(rx.recv() == 31337i); |
| } |
