mirror of
https://github.com/rust-lang/rust.git
synced 2024-11-30 02:33:55 +00:00
45 lines
1.9 KiB
Plaintext
45 lines
1.9 KiB
Plaintext
error[E0038]: the trait `Trait` cannot be made into an object
|
|
--> $DIR/E0038.rs:5:20
|
|
|
|
|
LL | fn call_foo(x: Box<dyn Trait>) {
|
|
| ^^^^^^^^^ `Trait` cannot be made into an object
|
|
|
|
|
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>
|
|
--> $DIR/E0038.rs:2:22
|
|
|
|
|
LL | trait Trait {
|
|
| ----- this trait cannot be made into an object...
|
|
LL | fn foo(&self) -> Self;
|
|
| ^^^^ ...because method `foo` references the `Self` type in its return type
|
|
= help: consider moving `foo` to another trait
|
|
|
|
error[E0038]: the trait `Trait` cannot be made into an object
|
|
--> $DIR/E0038.rs:7:13
|
|
|
|
|
LL | let y = x.foo();
|
|
| ^^^^^^^ `Trait` cannot be made into an object
|
|
|
|
|
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>
|
|
--> $DIR/E0038.rs:2:22
|
|
|
|
|
LL | trait Trait {
|
|
| ----- this trait cannot be made into an object...
|
|
LL | fn foo(&self) -> Self;
|
|
| ^^^^ ...because method `foo` references the `Self` type in its return type
|
|
= help: consider moving `foo` to another trait
|
|
|
|
error[E0277]: the size for values of type `dyn Trait` cannot be known at compilation time
|
|
--> $DIR/E0038.rs:7:9
|
|
|
|
|
LL | let y = x.foo();
|
|
| ^ doesn't have a size known at compile-time
|
|
|
|
|
= help: the trait `Sized` is not implemented for `dyn Trait`
|
|
= note: all local variables must have a statically known size
|
|
= help: unsized locals are gated as an unstable feature
|
|
|
|
error: aborting due to 3 previous errors
|
|
|
|
Some errors have detailed explanations: E0038, E0277.
|
|
For more information about an error, try `rustc --explain E0038`.
|