--> $DIR/trait-object-trait-parens.rs:8:35
|
LL | let _: Box<(Obj) + (?Sized) + (for<'a> Trait<'a>)>;
- | ----- ^^^^^^^^^^^^^^^^^^^
- | | |
- | | additional non-auto trait
- | | trait alias used in trait object type (additional use)
+ | ----- ^^^^^^^^^^^^^^^^^^^ additional non-auto trait
+ | |
| first non-auto trait
- | trait alias used in trait object type (first use)
+ |
+ = help: consider creating a new trait with all of these as super-traits 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>
error[E0225]: only auto traits can be used as additional traits in a trait object
--> $DIR/trait-object-trait-parens.rs:12:49
|
LL | let _: Box<(?Sized) + (for<'a> Trait<'a>) + (Obj)>;
- | ------------------- ^^^^^
- | | |
- | | additional non-auto trait
- | | trait alias used in trait object type (additional use)
+ | ------------------- ^^^^^ additional non-auto trait
+ | |
| first non-auto trait
- | trait alias used in trait object type (first use)
+ |
+ = help: consider creating a new trait with all of these as super-traits 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[E0225]: only auto traits can be used as additional traits in a trait object
--> $DIR/trait-object-trait-parens.rs:16:38
|
LL | let _: Box<(for<'a> Trait<'a>) + (Obj) + (?Sized)>;
- | ----------------- ^^^^^
- | | |
- | | additional non-auto trait
- | | trait alias used in trait object type (additional use)
+ | ----------------- ^^^^^ additional non-auto trait
+ | |
| first non-auto trait
- | trait alias used in trait object type (first use)
+ |
+ = help: consider creating a new trait with all of these as super-traits 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
+error: aborting due to 6 previous errors; 3 warnings emitted
For more information about this error, try `rustc --explain E0225`.