foo.rs

struct Foo<'self> {
    name: ~str,
    ref_bar: &'self Bar     // Bar lives as long as Foo
                            // When Foo is freed, Bar is freed
                            // No memory leaks!
}

struct Bar {
    name: ~str
}

impl Foo {
    // The ref name is valid with the lifetime of Foo
    // if Foo is freed so is the ref_name
    fn get_ref_name<'r> (&'r self) -> &'r~str {
        &self.name
    }
}

fn main() {}