blob: a3d6916cbf76085cae19df64fe314ef457fcd434 (
plain)
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
|
// run-pass
#![allow(non_upper_case_globals)]
#![allow(dead_code)]
#![allow(unused_assignments)]
#![allow(unused_variables)]
// Test a scenario where we generate a constraint like `?1 <: &?2`.
// In such a case, it is important that we instantiate `?1` with `&?3`
// where `?3 <: ?2`, and not with `&?2`. This is a regression test for
// #18653. The important thing is that we build.
use std::cell::RefCell;
enum Wrap<A> {
WrapSome(A),
WrapNone
}
use Wrap::*;
struct T;
struct U;
trait Get<T: ?Sized> {
fn get(&self) -> &T;
}
impl Get<dyn MyShow + 'static> for Wrap<T> {
fn get(&self) -> &(dyn MyShow + 'static) {
static x: usize = 42;
&x
}
}
impl Get<usize> for Wrap<U> {
fn get(&self) -> &usize {
static x: usize = 55;
&x
}
}
trait MyShow { fn dummy(&self) { } }
impl<'a> MyShow for &'a (dyn MyShow + 'a) { }
impl MyShow for usize { }
fn constrain<'a>(rc: RefCell<&'a (dyn MyShow + 'a)>) { }
fn main() {
let mut collection: Wrap<_> = WrapNone;
{
let __arg0 = Get::get(&collection);
let __args_cell = RefCell::new(__arg0);
constrain(__args_cell);
}
collection = WrapSome(T);
}
|
