kylebarron commented on PR #660:
URL:
https://github.com/apache/arrow-rs-object-store/pull/660#issuecomment-4068145779
> @kylebarron Thanks for your response.
>
> 1. Some issue with line endings apparently
> 2. Perhaps I am just doing something incorrect then. My use case is the
following:
>
> ```
> pub struct MyStream {
> pub store: Option<Arc<dyn ObjectStore>>,
> pub path: Option<Path>,
> pub state: Option<Pin<Box<dyn Future<Output = Result<GetResult,
object_store::Error>> + Send + 'static>>>
> ...
> }
>
> impl<'a> Stream for MyStream<'a> {
> type Item = Result<Bytes>;
>
> fn poll_next(mut self: Pin<&mut Self>, cx: &mut Context<'_>) ->
Poll<Option<Self::Item>> {
> ...
> let store = self.store.as_ref().unwrap().clone();
> let path = self.path.clone();
> let fut = Box::pin( store.get(&path));
> ^^^^"...cannot outlive `static...."
> self.state.replace(fut);
> self.poll_next(cx)
> ...
> }
> }
> ```
>
> 3. Gotcha
I don't usually work at the `poll_next` level; it's much too confusing for
90% of work that you can get done with higher level constructs.
That said, I think you might want your stream to itself have a `'static`
lifetime
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