René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Add a way to resize StackFutures","articleBody":"It'd be helpful to have a way to shrink (or less commonly, grow) a `StackFuture`. For example, sometimes you have an object that implements a trait and needs to forward calls to another object that implements the same trait. Right now that's impossible with `StackFuture` without boxing the child future because otherwise you'd have to have a future contain a future that's the same size as itself. That said, there will usually be some extra space so we might be able to dynamically shrink a `StackFuture`. \r\n\r\nThe signature would probably be something like:\r\n```rust\r\nfn resize\u003cconst NEW_SIZE: usize\u003e(self) -\u003e Result\u003cStackFuture\u003cT, NEW_SIZE\u003e, Self\u003e;\r\n```\r\n\r\nThen using this would look something like:\r\n```rust\r\nimpl Foo for MyObject {\r\n    fn bar(\u0026self) -\u003e StackFuture\u003c(), 1000\u003e {\r\n        match self.sub_object.bar().resize::\u003c{500}\u003e() {\r\n            Ok(f) =\u003e f.await,\r\n            Err(original) =\u003e Box::pin(original).await,\r\n        }\r\n    }\r\n}\r\n```\r\nThe idea here is we'd try to fit the future into a smaller container, but if it doesn't fit then the `resize` returns the original future and we can either decide to pay the allocation cost (as we did in this example) or give up.","author":{"url":"https://github.com/eholk","@type":"Person","name":"eholk"},"datePublished":"2022-08-08T19:17:20.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":5},"url":"https://github.com/6/stackfuture/issues/6"}