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Diffstat (limited to 'tests/ui/impl-trait/bound-normalization-fail.stderr')
-rw-r--r-- | tests/ui/impl-trait/bound-normalization-fail.stderr | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/tests/ui/impl-trait/bound-normalization-fail.stderr b/tests/ui/impl-trait/bound-normalization-fail.stderr new file mode 100644 index 000000000..f04a753a0 --- /dev/null +++ b/tests/ui/impl-trait/bound-normalization-fail.stderr @@ -0,0 +1,55 @@ +error[E0271]: type mismatch resolving `<Foo<()> as FooLike>::Output == <T as 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 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 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 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`. |