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