projects / rustc.git / blame
| Commit | Line | Data |
|---|---|---|
| b7449926 | 1 | error[E0038]: the trait `Tr` cannot be made into an object |
| dc9dc135 | 2 | --> $DIR/trait-object-safety.rs:15:22 |
| b7449926 | 3 | | |
| 29967ef6 XL |
4 | LL | let _: &dyn Tr = &St; |
| 5 | | ^^^ `Tr` cannot be made into an object | |
| 6 | | | |
| 7 | 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> | |
| 8 | --> $DIR/trait-object-safety.rs:4:8 | |
| 9 | | | |
| 74b04a01 XL |
10 | LL | trait Tr { |
| 11 | | -- this trait cannot be made into an object... | |
| e1599b0c | 12 | LL | fn foo(); |
| 29967ef6 | 13 | | ^^^ ...because associated function `foo` has no `self` parameter |
| 1b1a35ee | 14 | = note: required because of the requirements on the impl of `CoerceUnsized<&dyn Tr>` for `&St` |
| e74abb32 | 15 | = note: required by cast to type `&dyn Tr` |
| 29967ef6 XL |
16 | help: consider turning `foo` into a method by giving it a `&self` argument |
| 17 | | | |
| 18 | LL | fn foo(&self); | |
| 19 | | ^^^^^ | |
| 20 | help: alternatively, consider constraining `foo` so it does not apply to trait objects | |
| 74b04a01 XL |
21 | | |
| 22 | LL | fn foo() where Self: Sized; | |
| 23 | | ^^^^^^^^^^^^^^^^^ | |
| b7449926 XL |
24 | |
| 25 | error[E0038]: the trait `Tr` cannot be made into an object | |
| 0731742a | 26 | --> $DIR/trait-object-safety.rs:15:12 |
| b7449926 | 27 | | |
| 29967ef6 XL |
28 | LL | let _: &dyn Tr = &St; |
| 29 | | ^^^^^^^ `Tr` cannot be made into an object | |
| 30 | | | |
| 31 | 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> | |
| 32 | --> $DIR/trait-object-safety.rs:4:8 | |
| 33 | | | |
| 74b04a01 XL |
34 | LL | trait Tr { |
| 35 | | -- this trait cannot be made into an object... | |
| e1599b0c | 36 | LL | fn foo(); |
| 29967ef6 XL |
37 | | ^^^ ...because associated function `foo` has no `self` parameter |
| 38 | help: consider turning `foo` into a method by giving it a `&self` argument | |
| 74b04a01 | 39 | | |
| 29967ef6 XL |
40 | LL | fn foo(&self); |
| 41 | | ^^^^^ | |
| 42 | help: alternatively, consider constraining `foo` so it does not apply to trait objects | |
| 74b04a01 XL |
43 | | |
| 44 | LL | fn foo() where Self: Sized; | |
| 45 | | ^^^^^^^^^^^^^^^^^ | |
| b7449926 XL |
46 | |
| 47 | error: aborting due to 2 previous errors | |
| 48 | ||
| 49 | For more information about this error, try `rustc --explain E0038`. |