| // 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. |
| |
| // Check that the `'_` in `dyn Trait + '_` acts like ordinary elision, |
| // and not like an object lifetime default. |
| // |
| // cc #48468 |
| |
| fn a<T>(items: &[T]) -> Box<dyn Iterator<Item=&T>> { |
| // ^^^^^^^^^^^^^^^^^^^^^ bound *here* defaults to `'static` |
| Box::new(items.iter()) //~ ERROR cannot infer an appropriate lifetime |
| } |
| |
| fn b<T>(items: &[T]) -> Box<dyn Iterator<Item=&T> + '_> { |
| Box::new(items.iter()) // OK, equivalent to c |
| } |
| |
| fn c<'a, T>(items: &'a [T]) -> Box<dyn Iterator<Item=&'a T> + 'a> { |
| Box::new(items.iter()) // OK, equivalent to b |
| } |
| |
| fn main() { } |
