59 lines
1.1 KiB
Rust
59 lines
1.1 KiB
Rust
// run-pass
|
|
// Test that the lifetime of the enclosing `&` is used for the object
|
|
// lifetime bound.
|
|
|
|
// pretty-expanded FIXME #23616
|
|
|
|
#![allow(dead_code)]
|
|
|
|
use std::fmt::Display;
|
|
|
|
trait Test {
|
|
fn foo(&self) { }
|
|
}
|
|
|
|
struct Ref<'a,T:'a+?Sized> {
|
|
r: &'a T
|
|
}
|
|
|
|
struct Ref2<'a,'b,T:'a+'b+?Sized> {
|
|
a: &'a T,
|
|
b: &'b T
|
|
}
|
|
|
|
struct SomeStruct<'a> {
|
|
t: Ref<'a, dyn Test>,
|
|
u: Ref<'a, dyn Test+'a>,
|
|
}
|
|
|
|
fn a<'a>(t: Ref<'a, dyn Test>, mut ss: SomeStruct<'a>) {
|
|
ss.t = t;
|
|
}
|
|
|
|
fn b<'a>(t: Ref<'a, dyn Test>, mut ss: SomeStruct<'a>) {
|
|
ss.u = t;
|
|
}
|
|
|
|
fn c<'a>(t: Ref<'a, dyn Test+'a>, mut ss: SomeStruct<'a>) {
|
|
ss.t = t;
|
|
}
|
|
|
|
fn d<'a>(t: Ref<'a, dyn Test+'a>, mut ss: SomeStruct<'a>) {
|
|
ss.u = t;
|
|
}
|
|
|
|
fn e<'a>(_: Ref<'a, dyn Display+'static>) {}
|
|
fn g<'a, 'b>(_: Ref2<'a, 'b, dyn Display+'static>) {}
|
|
|
|
|
|
fn main() {
|
|
// Inside a function body, we can just infer all
|
|
// lifetimes, to allow Ref<'tmp, Display+'static>
|
|
// and Ref2<'tmp, 'tmp, Display+'static>.
|
|
let x = &0 as &(dyn Display+'static);
|
|
let r: Ref<dyn Display> = Ref { r: x };
|
|
let r2: Ref2<dyn Display> = Ref2 { a: x, b: x };
|
|
e(r);
|
|
g(r2);
|
|
}
|