rust/tests/ui/regions/regions-early-bound-used-in-bound-method.rs
2024-02-16 20:02:50 +00:00

31 lines
513 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);
}