diff options
Diffstat (limited to 'tests/ui/coherence')
5 files changed, 108 insertions, 30 deletions
diff --git a/tests/ui/coherence/coherence-impl-trait-for-marker-trait-negative.rs b/tests/ui/coherence/coherence-impl-trait-for-marker-trait-negative.rs index 50d9a480a..98f1558b7 100644 --- a/tests/ui/coherence/coherence-impl-trait-for-marker-trait-negative.rs +++ b/tests/ui/coherence/coherence-impl-trait-for-marker-trait-negative.rs @@ -12,19 +12,26 @@ auto trait Marker2 {} trait Object: Marker1 {} // A supertrait marker is illegal... -impl !Marker1 for dyn Object + Marker2 { } //~ ERROR E0371 +impl !Marker1 for dyn Object + Marker2 {} //~ ERROR E0371 + //~^ ERROR 0321 // ...and also a direct component. -impl !Marker2 for dyn Object + Marker2 { } //~ ERROR E0371 - -// But implementing a marker if it is not present is OK. -impl !Marker2 for dyn Object {} // OK +impl !Marker2 for dyn Object + Marker2 {} //~ ERROR E0371 + //~^ ERROR 0321 // A non-principal trait-object type is orphan even in its crate. impl !Send for dyn Marker2 {} //~ ERROR E0117 -// And impl'ing a remote marker for a local trait object is forbidden -// by one of these special orphan-like rules. +// Implementing a marker for a local trait object is forbidden by a special +// orphan-like rule. +impl !Marker2 for dyn Object {} //~ ERROR E0321 impl !Send for dyn Object {} //~ ERROR E0321 impl !Send for dyn Object + Marker2 {} //~ ERROR E0321 -fn main() { } +// Blanket impl that applies to dyn Object is equally problematic. +auto trait Marker3 {} +impl<T: ?Sized> !Marker3 for T {} //~ ERROR E0321 + +auto trait Marker4 {} +impl<T> !Marker4 for T {} // okay + +fn main() {} diff --git a/tests/ui/coherence/coherence-impl-trait-for-marker-trait-negative.stderr b/tests/ui/coherence/coherence-impl-trait-for-marker-trait-negative.stderr index c364c707f..ea38afc40 100644 --- a/tests/ui/coherence/coherence-impl-trait-for-marker-trait-negative.stderr +++ b/tests/ui/coherence/coherence-impl-trait-for-marker-trait-negative.stderr @@ -1,17 +1,41 @@ error[E0371]: the object type `(dyn Object + Marker2 + 'static)` automatically implements the trait `Marker1` --> $DIR/coherence-impl-trait-for-marker-trait-negative.rs:15:1 | -LL | impl !Marker1 for dyn Object + Marker2 { } +LL | impl !Marker1 for dyn Object + Marker2 {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Object + Marker2 + 'static)` automatically implements trait `Marker1` +error[E0321]: traits with a default impl, like `Marker1`, cannot be implemented for trait object `(dyn Object + Marker2 + 'static)` + --> $DIR/coherence-impl-trait-for-marker-trait-negative.rs:15:1 + | +LL | impl !Marker1 for dyn Object + Marker2 {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: a trait object implements `Marker1` if and only if `Marker1` is one of the trait object's trait bounds + error[E0371]: the object type `(dyn Object + Marker2 + 'static)` automatically implements the trait `Marker2` - --> $DIR/coherence-impl-trait-for-marker-trait-negative.rs:17:1 + --> $DIR/coherence-impl-trait-for-marker-trait-negative.rs:18:1 | -LL | impl !Marker2 for dyn Object + Marker2 { } +LL | impl !Marker2 for dyn Object + Marker2 {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Object + Marker2 + 'static)` automatically implements trait `Marker2` +error[E0321]: traits with a default impl, like `Marker2`, cannot be implemented for trait object `(dyn Object + Marker2 + 'static)` + --> $DIR/coherence-impl-trait-for-marker-trait-negative.rs:18:1 + | +LL | impl !Marker2 for dyn Object + Marker2 {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: a trait object implements `Marker2` if and only if `Marker2` is one of the trait object's trait bounds + +error[E0321]: traits with a default impl, like `Marker2`, cannot be implemented for trait object `(dyn Object + 'static)` + --> $DIR/coherence-impl-trait-for-marker-trait-negative.rs:26:1 + | +LL | impl !Marker2 for dyn Object {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: a trait object implements `Marker2` if and only if `Marker2` is one of the trait object's trait bounds + error[E0117]: only traits defined in the current crate can be implemented for arbitrary types - --> $DIR/coherence-impl-trait-for-marker-trait-negative.rs:23:1 + --> $DIR/coherence-impl-trait-for-marker-trait-negative.rs:22:1 | LL | impl !Send for dyn Marker2 {} | ^^^^^^^^^^^^^^^----------- @@ -33,7 +57,15 @@ error[E0321]: cross-crate traits with a default impl, like `Send`, can only be i LL | impl !Send for dyn Object + Marker2 {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't implement cross-crate trait with a default impl for non-struct/enum type -error: aborting due to 5 previous errors +error[E0321]: traits with a default impl, like `Marker3`, cannot be implemented for generic type `T` + --> $DIR/coherence-impl-trait-for-marker-trait-negative.rs:32:1 + | +LL | impl<T: ?Sized> !Marker3 for T {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: a trait object implements `Marker3` if and only if `Marker3` is one of the trait object's trait bounds + +error: aborting due to 9 previous errors Some errors have detailed explanations: E0117, E0321, E0371. For more information about an error, try `rustc --explain E0117`. diff --git a/tests/ui/coherence/coherence-impl-trait-for-marker-trait-positive.rs b/tests/ui/coherence/coherence-impl-trait-for-marker-trait-positive.rs index faac6d983..db2e2b450 100644 --- a/tests/ui/coherence/coherence-impl-trait-for-marker-trait-positive.rs +++ b/tests/ui/coherence/coherence-impl-trait-for-marker-trait-positive.rs @@ -12,19 +12,26 @@ auto trait Marker2 {} trait Object: Marker1 {} // A supertrait marker is illegal... -impl Marker1 for dyn Object + Marker2 { } //~ ERROR E0371 +impl Marker1 for dyn Object + Marker2 {} //~ ERROR E0371 + //~^ ERROR E0321 // ...and also a direct component. -impl Marker2 for dyn Object + Marker2 { } //~ ERROR E0371 - -// But implementing a marker if it is not present is OK. -impl Marker2 for dyn Object {} // OK +impl Marker2 for dyn Object + Marker2 {} //~ ERROR E0371 + //~^ ERROR E0321 // A non-principal trait-object type is orphan even in its crate. unsafe impl Send for dyn Marker2 {} //~ ERROR E0117 -// And impl'ing a remote marker for a local trait object is forbidden -// by one of these special orphan-like rules. +// Implementing a marker for a local trait object is forbidden by a special +// orphan-like rule. +impl Marker2 for dyn Object {} //~ ERROR E0321 unsafe impl Send for dyn Object {} //~ ERROR E0321 unsafe impl Send for dyn Object + Marker2 {} //~ ERROR E0321 -fn main() { } +// Blanket impl that applies to dyn Object is equally problematic. +auto trait Marker3 {} +impl<T: ?Sized> Marker3 for T {} //~ ERROR E0321 + +auto trait Marker4 {} +impl<T> Marker4 for T {} // okay + +fn main() {} diff --git a/tests/ui/coherence/coherence-impl-trait-for-marker-trait-positive.stderr b/tests/ui/coherence/coherence-impl-trait-for-marker-trait-positive.stderr index b80429794..2a8713bc3 100644 --- a/tests/ui/coherence/coherence-impl-trait-for-marker-trait-positive.stderr +++ b/tests/ui/coherence/coherence-impl-trait-for-marker-trait-positive.stderr @@ -1,17 +1,41 @@ error[E0371]: the object type `(dyn Object + Marker2 + 'static)` automatically implements the trait `Marker1` --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:15:1 | -LL | impl Marker1 for dyn Object + Marker2 { } +LL | impl Marker1 for dyn Object + Marker2 {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Object + Marker2 + 'static)` automatically implements trait `Marker1` +error[E0321]: traits with a default impl, like `Marker1`, cannot be implemented for trait object `(dyn Object + Marker2 + 'static)` + --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:15:1 + | +LL | impl Marker1 for dyn Object + Marker2 {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: a trait object implements `Marker1` if and only if `Marker1` is one of the trait object's trait bounds + error[E0371]: the object type `(dyn Object + Marker2 + 'static)` automatically implements the trait `Marker2` - --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:17:1 + --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:18:1 | -LL | impl Marker2 for dyn Object + Marker2 { } +LL | impl Marker2 for dyn Object + Marker2 {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `(dyn Object + Marker2 + 'static)` automatically implements trait `Marker2` +error[E0321]: traits with a default impl, like `Marker2`, cannot be implemented for trait object `(dyn Object + Marker2 + 'static)` + --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:18:1 + | +LL | impl Marker2 for dyn Object + Marker2 {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: a trait object implements `Marker2` if and only if `Marker2` is one of the trait object's trait bounds + +error[E0321]: traits with a default impl, like `Marker2`, cannot be implemented for trait object `(dyn Object + 'static)` + --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:26:1 + | +LL | impl Marker2 for dyn Object {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: a trait object implements `Marker2` if and only if `Marker2` is one of the trait object's trait bounds + error[E0117]: only traits defined in the current crate can be implemented for arbitrary types - --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:23:1 + --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:22:1 | LL | unsafe impl Send for dyn Marker2 {} | ^^^^^^^^^^^^^^^^^^^^^----------- @@ -33,7 +57,15 @@ error[E0321]: cross-crate traits with a default impl, like `Send`, can only be i LL | unsafe impl Send for dyn Object + Marker2 {} | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ can't implement cross-crate trait with a default impl for non-struct/enum type -error: aborting due to 5 previous errors +error[E0321]: traits with a default impl, like `Marker3`, cannot be implemented for generic type `T` + --> $DIR/coherence-impl-trait-for-marker-trait-positive.rs:32:1 + | +LL | impl<T: ?Sized> Marker3 for T {} + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: a trait object implements `Marker3` if and only if `Marker3` is one of the trait object's trait bounds + +error: aborting due to 9 previous errors Some errors have detailed explanations: E0117, E0321, E0371. For more information about an error, try `rustc --explain E0117`. diff --git a/tests/ui/coherence/issue-85026.stderr b/tests/ui/coherence/issue-85026.stderr index a5da19bbf..fb6e99765 100644 --- a/tests/ui/coherence/issue-85026.stderr +++ b/tests/ui/coherence/issue-85026.stderr @@ -1,16 +1,16 @@ error[E0785]: cannot define inherent `impl` for a dyn auto trait - --> $DIR/issue-85026.rs:5:6 + --> $DIR/issue-85026.rs:5:1 | LL | impl dyn AutoTrait {} - | ^^^^^^^^^^^^^ impl requires at least one non-auto trait + | ^^^^^^^^^^^^^^^^^^ impl requires at least one non-auto trait | = note: define and implement a new trait or type instead error[E0785]: cannot define inherent `impl` for a dyn auto trait - --> $DIR/issue-85026.rs:8:6 + --> $DIR/issue-85026.rs:8:1 | LL | impl dyn Unpin {} - | ^^^^^^^^^ impl requires at least one non-auto trait + | ^^^^^^^^^^^^^^ impl requires at least one non-auto trait | = note: define and implement a new trait or type instead |