rust/tests/ui/wf/ice-hir-wf-check-anon-const-issue-122989.stderr
2024-06-05 22:25:42 +01:00

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warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:2:20
|
LL | trait Foo<const N: Bar<2>> {
| ^^^^^^
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
= note: `#[warn(bare_trait_objects)]` on by default
help: if this is an object-safe trait, use `dyn`
|
LL | trait Foo<const N: dyn Bar<2>> {
| +++
warning: trait objects without an explicit `dyn` are deprecated
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:11:20
|
LL | trait Bar<const M: Foo<2>> {}
| ^^^^^^
|
= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
help: if this is an object-safe trait, use `dyn`
|
LL | trait Bar<const M: dyn Foo<2>> {}
| +++
error[E0391]: cycle detected when computing type of `Foo::N`
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:2:11
|
LL | trait Foo<const N: Bar<2>> {
| ^^^^^^^^^^^^^^^
|
note: ...which requires computing type of `Bar::M`...
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:11:11
|
LL | trait Bar<const M: Foo<2>> {}
| ^^^^^^^^^^^^^^^
= note: ...which again requires computing type of `Foo::N`, completing the cycle
note: cycle used when computing explicit predicates of trait `Foo`
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:2:1
|
LL | trait Foo<const N: Bar<2>> {
| ^^^^^^^^^^^^^^^^^^^^^^^^^^
= note: see https://rustc-dev-guide.rust-lang.org/overview.html#queries and https://rustc-dev-guide.rust-lang.org/query.html for more information
error[E0038]: the trait `Foo` cannot be made into an object
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:2:24
|
LL | trait Foo<const N: Bar<2>> {
| ^ `Foo` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:8:8
|
LL | trait Foo<const N: Bar<2>> {
| --- this trait cannot be made into an object...
...
LL | fn func() {}
| ^^^^ ...because associated function `func` has no `self` parameter
help: consider turning `func` into a method by giving it a `&self` argument
|
LL | fn func(&self) {}
| +++++
help: alternatively, consider constraining `func` so it does not apply to trait objects
|
LL | fn func() where Self: Sized {}
| +++++++++++++++++
error: `(dyn Bar<2> + 'static)` is forbidden as the type of a const generic parameter
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:2:20
|
LL | trait Foo<const N: Bar<2>> {
| ^^^^^^
|
= note: the only supported types are integers, `bool` and `char`
error[E0038]: the trait `Foo` cannot be made into an object
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:11:11
|
LL | trait Bar<const M: Foo<2>> {}
| ^^^^^^^^^^^^^^^ `Foo` cannot be made into an object
|
note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:8:8
|
LL | trait Foo<const N: Bar<2>> {
| --- this trait cannot be made into an object...
...
LL | fn func() {}
| ^^^^ ...because associated function `func` has no `self` parameter
help: consider turning `func` into a method by giving it a `&self` argument
|
LL | fn func(&self) {}
| +++++
help: alternatively, consider constraining `func` so it does not apply to trait objects
|
LL | fn func() where Self: Sized {}
| +++++++++++++++++
error: `(dyn Foo<2> + 'static)` is forbidden as the type of a const generic parameter
--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:11:20
|
LL | trait Bar<const M: Foo<2>> {}
| ^^^^^^
|
= note: the only supported types are integers, `bool` and `char`
error: aborting due to 5 previous errors; 2 warnings emitted
Some errors have detailed explanations: E0038, E0391.
For more information about an error, try `rustc --explain E0038`.