rust/tests/ui/regions/regions-issue-22246.rs

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// run-pass
#![allow(unused_imports)]
// Regression test for issue #22246 -- we should be able to deduce
// that `&'a B::Owned` implies that `B::Owned : 'a`.
// pretty-expanded FIXME #23616
#![allow(dead_code)]
use std::ops::Deref;
pub trait ToOwned: Sized {
type Owned: Borrow<Self>;
fn to_owned(&self) -> Self::Owned;
}
pub trait Borrow<Borrowed> {
fn borrow(&self) -> &Borrowed;
}
pub struct Foo<B:ToOwned> {
owned: B::Owned
}
fn foo<B:ToOwned>(this: &Foo<B>) -> &B {
this.owned.borrow()
}
fn main() { }