mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-01 06:51:58 +00:00
21 lines
595 B
Rust
21 lines
595 B
Rust
// 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 lifetime may not live long enough
|
|
}
|
|
|
|
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() { }
|