1 // Copyright 2015 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 // This test ensures that each pointer type `P<X>` is covariant in `X`.
18 fn a<'r>(x: Box<&'static str>) -> Box<&'r str> {
22 fn b<'r, 'w>(x: &'w &'static str) -> &'w &'r str {
26 fn c<'r>(x: Arc<&'static str>) -> Arc<&'r str> {
30 fn d<'r>(x: Rc<&'static str>) -> Rc<&'r str> {