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|
// 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);
}
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