The following code:
trait ClientResponse: DeserializeOwned + Send + Sized {}
struct ClientMsg {
...
resp: oneshot::Sender<Box<dyn ClientResponse>>
}
async fn client_thread(rx: mpsc::Receiver<ClientMsg>, client: reqwest::Client, base_url: Url) -> Result<(), Box<dyn Error>> {
while let Some(msg) = rx.recv().await {
...
let response = client.get(url).send().await?.json().await?;
msg.resp.send(response);
}
}
Fails with error:
error[E0038]: the trait `ClientResponse` cannot be made into an object
--> src/main.rs:16:11
|
16 | resp: oneshot::Sender<Box<dyn ClientResponse>>
| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ `ClientResponse` 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>
--> src/main.rs:12:23
|
12 | trait ClientResponse: DeserializeOwned + Send + Sized {}
| -------------- ^^^^^^^^^^^^^^^^ ^^^^^ ...because it requires `Self: Sized`
| | |
| | ...because it requires `Self: Sized`
| this trait cannot be made into an object...
As you can see, I tried adding the Sized trait as a super trait after reading the compiler error, but it still gives me the same error. I'm not sure how else to approach this problem, since I want a client thread that can deserialize responses into types decided by the senders.
