mirror of
https://github.com/rust-lang/rust.git
synced 2025-11-03 22:49:17 +00:00
31 lines
512 B
Rust
31 lines
512 B
Rust
// run-pass
|
|
// Tests that you can use a fn lifetime parameter as part of
|
|
// the value for a type parameter in a bound.
|
|
|
|
|
|
trait GetRef<'a> {
|
|
fn get(&self) -> &'a isize;
|
|
}
|
|
|
|
#[derive(Copy, Clone)]
|
|
struct Box<'a> {
|
|
t: &'a isize
|
|
}
|
|
|
|
impl<'a> GetRef<'a> for Box<'a> {
|
|
fn get(&self) -> &'a isize {
|
|
self.t
|
|
}
|
|
}
|
|
|
|
impl<'a> Box<'a> {
|
|
fn add<'b,G:GetRef<'b>>(&self, g2: G) -> isize {
|
|
*self.t + *g2.get()
|
|
}
|
|
}
|
|
|
|
pub fn main() {
|
|
let b1 = Box { t: &3 };
|
|
assert_eq!(b1.add(b1), 6);
|
|
}
|