1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
// Copyright 2015 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
// 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,Test>,
u: Ref<'a,Test+'a>,
}
fn a<'a>(t: Ref<'a,Test>, mut ss: SomeStruct<'a>) {
ss.t = t;
}
fn b<'a>(t: Ref<'a,Test>, mut ss: SomeStruct<'a>) {
ss.u = t;
}
fn c<'a>(t: Ref<'a,Test+'a>, mut ss: SomeStruct<'a>) {
ss.t = t;
}
fn d<'a>(t: Ref<'a,Test+'a>, mut ss: SomeStruct<'a>) {
ss.u = t;
}
fn e<'a>(_: Ref<'a, Display+'static>) {}
fn g<'a, 'b>(_: Ref2<'a, 'b, 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 &(Display+'static);
let r: Ref<Display> = Ref { r: x };
let r2: Ref2<Display> = Ref2 { a: x, b: x };
e(r);
g(r2);
}
|
