blob: f6b19e7adf512f3b95ca960411d775f0bc7e852f (
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
|
// compile-flags: -Ztrait-solver=next
#![feature(specialization)]
//~^ WARN the feature `specialization` is incomplete
trait Default {
type Id;
fn intu(&self) -> &Self::Id;
}
impl<T> Default for T {
default type Id = T;
// This will be fixed by #111994
fn intu(&self) -> &Self::Id { //~ ERROR type annotations needed
self
}
}
fn transmute<T: Default<Id = U>, U: Copy>(t: T) -> U {
*t.intu()
}
use std::num::NonZeroU8;
fn main() {
let s = transmute::<u8, Option<NonZeroU8>>(0); // this call should then error
assert_eq!(s, None);
}
|
