blob: a9fa2da569f85e08be827526537979842450d504 (
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
|
error[E0271]: type mismatch resolving `<Foo<()> as FooLike>::Output == <T as impl_trait::Trait>::Assoc`
--> $DIR/bound-normalization-fail.rs:25:32
|
LL | fn foo_fail<T: Trait>() -> impl FooLike<Output = T::Assoc> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type mismatch resolving `<Foo<()> as FooLike>::Output == <T as impl_trait::Trait>::Assoc`
LL |
LL | Foo(())
| ------- return type was inferred to be `Foo<()>` here
|
note: expected this to be `()`
--> $DIR/bound-normalization-fail.rs:14:19
|
LL | type Output = T;
| ^
= note: expected unit type `()`
found associated type `<T as impl_trait::Trait>::Assoc`
help: consider constraining the associated type `<T as impl_trait::Trait>::Assoc` to `()`
|
LL | fn foo_fail<T: Trait<Assoc = ()>>() -> impl FooLike<Output = T::Assoc> {
| ++++++++++++
error[E0658]: `impl Trait` return type cannot contain a projection or `Self` that references lifetimes from a parent scope
--> $DIR/bound-normalization-fail.rs:41:41
|
LL | fn foo2_fail<'a, T: Trait<'a>>() -> impl FooLike<Output = T::Assoc> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
= note: see issue #103532 <https://github.com/rust-lang/rust/issues/103532> for more information
= help: add `#![feature(impl_trait_projections)]` to the crate attributes to enable
error[E0271]: type mismatch resolving `<Foo<()> as FooLike>::Output == <T as lifetimes::Trait<'a>>::Assoc`
--> $DIR/bound-normalization-fail.rs:41:41
|
LL | fn foo2_fail<'a, T: Trait<'a>>() -> impl FooLike<Output = T::Assoc> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ type mismatch resolving `<Foo<()> as FooLike>::Output == <T as lifetimes::Trait<'a>>::Assoc`
...
LL | Foo(())
| ------- return type was inferred to be `Foo<()>` here
|
note: expected this to be `()`
--> $DIR/bound-normalization-fail.rs:14:19
|
LL | type Output = T;
| ^
= note: expected unit type `()`
found associated type `<T as lifetimes::Trait<'a>>::Assoc`
help: consider constraining the associated type `<T as lifetimes::Trait<'a>>::Assoc` to `()`
|
LL | fn foo2_fail<'a, T: Trait<'a, Assoc = ()>>() -> impl FooLike<Output = T::Assoc> {
| ++++++++++++
error: aborting due to 3 previous errors
Some errors have detailed explanations: E0271, E0658.
For more information about an error, try `rustc --explain E0271`.
|
