rust/tests/ui/dyn-compatibility/undispatchable-receiver-and-wc-references-Self.stderr
2024-10-10 01:13:29 +02:00

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error[E0038]: the trait `Fetcher` cannot be made into an object
--> $DIR/undispatchable-receiver-and-wc-references-Self.rs:19:21
|
LL | fn get<'a>(self: &'a Box<Self>) -> Pin<Box<dyn Future<Output = Vec<u8>> + 'a>>
| ------------- help: consider changing method `get`'s `self` parameter to be `&self`: `&Self`
...
LL | fn fetcher() -> Box<dyn Fetcher> {
| ^^^^^^^^^^^ `Fetcher` cannot be made into an object
|
note: for a trait to be "dyn-compatible" 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/undispatchable-receiver-and-wc-references-Self.rs:11:22
|
LL | pub trait Fetcher: Send + Sync {
| ------- this trait cannot be made into an object...
LL | fn get<'a>(self: &'a Box<Self>) -> Pin<Box<dyn Future<Output = Vec<u8>> + 'a>>
| ^^^^^^^^^^^^^ ...because method `get`'s `self` parameter cannot be dispatched on
error[E0038]: the trait `Fetcher` cannot be made into an object
--> $DIR/undispatchable-receiver-and-wc-references-Self.rs:25:19
|
LL | fn get<'a>(self: &'a Box<Self>) -> Pin<Box<dyn Future<Output = Vec<u8>> + 'a>>
| ------------- help: consider changing method `get`'s `self` parameter to be `&self`: `&Self`
...
LL | let fetcher = fetcher();
| ^^^^^^^^^ `Fetcher` cannot be made into an object
|
note: for a trait to be "dyn-compatible" 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/undispatchable-receiver-and-wc-references-Self.rs:11:22
|
LL | pub trait Fetcher: Send + Sync {
| ------- this trait cannot be made into an object...
LL | fn get<'a>(self: &'a Box<Self>) -> Pin<Box<dyn Future<Output = Vec<u8>> + 'a>>
| ^^^^^^^^^^^^^ ...because method `get`'s `self` parameter cannot be dispatched on
error[E0038]: the trait `Fetcher` cannot be made into an object
--> $DIR/undispatchable-receiver-and-wc-references-Self.rs:27:13
|
LL | fn get<'a>(self: &'a Box<Self>) -> Pin<Box<dyn Future<Output = Vec<u8>> + 'a>>
| ------------- help: consider changing method `get`'s `self` parameter to be `&self`: `&Self`
...
LL | let _ = fetcher.get();
| ^^^^^^^^^^^^^ `Fetcher` cannot be made into an object
|
note: for a trait to be "dyn-compatible" 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/undispatchable-receiver-and-wc-references-Self.rs:11:22
|
LL | pub trait Fetcher: Send + Sync {
| ------- this trait cannot be made into an object...
LL | fn get<'a>(self: &'a Box<Self>) -> Pin<Box<dyn Future<Output = Vec<u8>> + 'a>>
| ^^^^^^^^^^^^^ ...because method `get`'s `self` parameter cannot be dispatched on
error: aborting due to 3 previous errors
For more information about this error, try `rustc --explain E0038`.