| // check-pass | |
| #![allow(dead_code)] | |
| // 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() {} |