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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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date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 a dyn-compatible 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 a dyn-compatible 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 a dyn-compatible 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`.
|
