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c5598d6a9e
avoid `{type error}` being leaked in user-facing messages,
particularly when using the `adt_const_params` feature
113 lines
4.7 KiB
Plaintext
113 lines
4.7 KiB
Plaintext
warning: trait objects without an explicit `dyn` are deprecated
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:2:20
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LL | trait Foo<const N: Bar<2>> {
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| ^^^^^^
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= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
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= note: `#[warn(bare_trait_objects)]` on by default
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help: if this is a dyn-compatible trait, use `dyn`
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LL | trait Foo<const N: dyn Bar<2>> {
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| +++
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warning: trait objects without an explicit `dyn` are deprecated
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:11:20
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LL | trait Bar<const M: Foo<2>> {}
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| ^^^^^^
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= warning: this is accepted in the current edition (Rust 2015) but is a hard error in Rust 2021!
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= note: for more information, see <https://doc.rust-lang.org/nightly/edition-guide/rust-2021/warnings-promoted-to-error.html>
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help: if this is a dyn-compatible trait, use `dyn`
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LL | trait Bar<const M: dyn Foo<2>> {}
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| +++
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error[E0391]: cycle detected when computing type of `Foo::N`
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:2:11
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LL | trait Foo<const N: Bar<2>> {
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| ^^^^^^^^^^^^^^^
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note: ...which requires computing type of `Bar::M`...
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:11:11
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LL | trait Bar<const M: Foo<2>> {}
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| ^^^^^^^^^^^^^^^
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= note: ...which again requires computing type of `Foo::N`, completing the cycle
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note: cycle used when computing explicit predicates of trait `Foo`
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:2:1
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LL | trait Foo<const N: Bar<2>> {
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| ^^^^^^^^^^^^^^^^^^^^^^^^^^
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= 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
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error[E0038]: the trait `Foo` cannot be made into an object
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:2:24
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LL | trait Foo<const N: Bar<2>> {
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| ^ `Foo` cannot be made into an object
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note: for a trait to be "dyn-compatible" 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>
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:8:8
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LL | trait Foo<const N: Bar<2>> {
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| --- this trait cannot be made into an object...
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...
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LL | fn func() {}
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| ^^^^ ...because associated function `func` has no `self` parameter
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help: consider turning `func` into a method by giving it a `&self` argument
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LL | fn func(&self) {}
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| +++++
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help: alternatively, consider constraining `func` so it does not apply to trait objects
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LL | fn func() where Self: Sized {}
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| +++++++++++++++++
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error: `(dyn Bar<2> + 'static)` is forbidden as the type of a const generic parameter
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:2:20
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LL | trait Foo<const N: Bar<2>> {
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| ^^^^^^
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= note: the only supported types are integers, `bool`, and `char`
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error[E0038]: the trait `Foo` cannot be made into an object
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:11:11
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LL | trait Bar<const M: Foo<2>> {}
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| ^^^^^^^^^^^^^^^ `Foo` cannot be made into an object
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note: for a trait to be "dyn-compatible" 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>
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:8:8
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LL | trait Foo<const N: Bar<2>> {
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| --- this trait cannot be made into an object...
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...
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LL | fn func() {}
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| ^^^^ ...because associated function `func` has no `self` parameter
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help: consider turning `func` into a method by giving it a `&self` argument
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LL | fn func(&self) {}
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| +++++
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help: alternatively, consider constraining `func` so it does not apply to trait objects
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LL | fn func() where Self: Sized {}
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| +++++++++++++++++
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error: `(dyn Foo<2> + 'static)` is forbidden as the type of a const generic parameter
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--> $DIR/ice-hir-wf-check-anon-const-issue-122989.rs:11:20
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LL | trait Bar<const M: Foo<2>> {}
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| ^^^^^^
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= note: the only supported types are integers, `bool`, and `char`
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error: aborting due to 5 previous errors; 2 warnings emitted
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Some errors have detailed explanations: E0038, E0391.
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For more information about an error, try `rustc --explain E0038`.
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