| // Copyright 2015 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. |
| |
| // This test ensures that each pointer type `P<X>` is covariant in `X`. |
| |
| use std::rc::Rc; |
| use std::sync::Arc; |
| |
| fn a<'r>(x: Box<&'static str>) -> Box<&'r str> { |
| x |
| } |
| |
| fn b<'r, 'w>(x: &'w &'static str) -> &'w &'r str { |
| x |
| } |
| |
| fn c<'r>(x: Arc<&'static str>) -> Arc<&'r str> { |
| x |
| } |
| |
| fn d<'r>(x: Rc<&'static str>) -> Rc<&'r str> { |
| x |
| } |
| |
| fn main() {} |
