mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-23 07:14:28 +00:00
105 lines
5.2 KiB
Plaintext
105 lines
5.2 KiB
Plaintext
error[E0658]: `?Trait` is not permitted in trait object types
|
|
--> $DIR/trait-object-trait-parens.rs:8:24
|
|
|
|
|
LL | let _: Box<(Obj) + (?Sized) + (for<'a> Trait<'a>)>;
|
|
| ^^^^^^^^
|
|
|
|
|
= help: add `#![feature(more_maybe_bounds)]` to the crate attributes to enable
|
|
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
|
|
|
|
error[E0658]: `?Trait` is not permitted in trait object types
|
|
--> $DIR/trait-object-trait-parens.rs:13:16
|
|
|
|
|
LL | let _: Box<?Sized + (for<'a> Trait<'a>) + (Obj)>;
|
|
| ^^^^^^
|
|
|
|
|
= help: add `#![feature(more_maybe_bounds)]` to the crate attributes to enable
|
|
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
|
|
|
|
error[E0658]: `?Trait` is not permitted in trait object types
|
|
--> $DIR/trait-object-trait-parens.rs:18:44
|
|
|
|
|
LL | let _: Box<for<'a> Trait<'a> + (Obj) + (?Sized)>;
|
|
| ^^^^^^^^
|
|
|
|
|
= help: add `#![feature(more_maybe_bounds)]` to the crate attributes to enable
|
|
= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
|
|
|
|
warning: trait objects without an explicit `dyn` are deprecated
|
|
--> $DIR/trait-object-trait-parens.rs:8:16
|
|
|
|
|
LL | let _: Box<(Obj) + (?Sized) + (for<'a> Trait<'a>)>;
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
= 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 | let _: Box<dyn (Obj) + (?Sized) + (for<'a> Trait<'a>)>;
|
|
| +++
|
|
|
|
error[E0225]: only auto traits can be used as additional traits in a trait object
|
|
--> $DIR/trait-object-trait-parens.rs:8:35
|
|
|
|
|
LL | let _: Box<(Obj) + (?Sized) + (for<'a> Trait<'a>)>;
|
|
| ----- ^^^^^^^^^^^^^^^^^^^ additional non-auto trait
|
|
| |
|
|
| first non-auto trait
|
|
|
|
|
= help: consider creating a new trait with all of these as supertraits and using that trait here instead: `trait NewTrait: Obj + for<'a> Trait<'a> {}`
|
|
= note: auto-traits like `Send` and `Sync` are traits that have special properties; for more information on them, visit <https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits>
|
|
|
|
warning: trait objects without an explicit `dyn` are deprecated
|
|
--> $DIR/trait-object-trait-parens.rs:13:16
|
|
|
|
|
LL | let _: Box<?Sized + (for<'a> Trait<'a>) + (Obj)>;
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
= 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 | let _: Box<dyn ?Sized + (for<'a> Trait<'a>) + (Obj)>;
|
|
| +++
|
|
|
|
error[E0225]: only auto traits can be used as additional traits in a trait object
|
|
--> $DIR/trait-object-trait-parens.rs:13:47
|
|
|
|
|
LL | let _: Box<?Sized + (for<'a> Trait<'a>) + (Obj)>;
|
|
| ------------------- ^^^^^ additional non-auto trait
|
|
| |
|
|
| first non-auto trait
|
|
|
|
|
= help: consider creating a new trait with all of these as supertraits and using that trait here instead: `trait NewTrait: for<'a> Trait<'a> + Obj {}`
|
|
= note: auto-traits like `Send` and `Sync` are traits that have special properties; for more information on them, visit <https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits>
|
|
|
|
warning: trait objects without an explicit `dyn` are deprecated
|
|
--> $DIR/trait-object-trait-parens.rs:18:16
|
|
|
|
|
LL | let _: Box<for<'a> Trait<'a> + (Obj) + (?Sized)>;
|
|
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
|
|
|
|
|
= 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 | let _: Box<dyn for<'a> Trait<'a> + (Obj) + (?Sized)>;
|
|
| +++
|
|
|
|
error[E0225]: only auto traits can be used as additional traits in a trait object
|
|
--> $DIR/trait-object-trait-parens.rs:18:36
|
|
|
|
|
LL | let _: Box<for<'a> Trait<'a> + (Obj) + (?Sized)>;
|
|
| ----------------- ^^^^^ additional non-auto trait
|
|
| |
|
|
| first non-auto trait
|
|
|
|
|
= help: consider creating a new trait with all of these as supertraits and using that trait here instead: `trait NewTrait: for<'a> Trait<'a> + Obj {}`
|
|
= note: auto-traits like `Send` and `Sync` are traits that have special properties; for more information on them, visit <https://doc.rust-lang.org/reference/special-types-and-traits.html#auto-traits>
|
|
|
|
error: aborting due to 6 previous errors; 3 warnings emitted
|
|
|
|
Some errors have detailed explanations: E0225, E0658.
|
|
For more information about an error, try `rustc --explain E0225`.
|