blob: b9e65ed283935798e5de53005040564aaa1dff8e (
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
|
//@ compile-flags: --crate-type=lib
//@ revisions: current next current_sized_hierarchy next_sized_hierarchy
//@ ignore-compare-mode-next-solver (explicit revisions)
//@[current] check-pass
//@[next] check-pass
//@[next] compile-flags: -Znext-solver
//@[next_sized_hierarchy] compile-flags: -Znext-solver
#![cfg_attr(any(current_sized_hierarchy, next_sized_hierarchy), feature(sized_hierarchy))]
// Test that we avoid incomplete inference when normalizing. Without this,
// `Trait`'s implicit `MetaSized` supertrait requires proving `T::Assoc<_>: MetaSized`
// before checking the `new` arguments, resulting in eagerly constraining the inference
// var to `u32`. This is undesirable and would breaking code.
pub trait Trait {
type Assoc<G>: OtherTrait<G>;
}
pub trait OtherTrait<R> {
fn new(r: R) -> R {
r
}
}
pub fn function<T: Trait>()
where
T::Assoc<[u32; 1]>: Clone,
{
let _x = T::Assoc::new(());
//[next_sized_hierarchy]~^ ERROR mismatched types
//[current_sized_hierarchy]~^^ ERROR mismatched types
}
|
