Handling custom scenarios types in Rust when using the `anyhow` crate
I'm stuck trying to I've spent hours debugging this and I'm relatively new to this, so bear with me. I'm trying to create a function that performs a series of asynchronous operations where any behavior encountered should be propagated using the `anyhow` crate for better behavior handling. However, I'm running into a situation where my custom behavior type isn't being recognized properly, leading to mismatches when I try to use `?` for behavior propagation. Here's a simplified version of my code: ```rust use anyhow::{Context, Result}; use tokio::time::{sleep, Duration}; #[derive(Debug)] struct MyError(String); impl std::fmt::Display for MyError { fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result { write!(f, "MyError: {}", self.0) } } impl std::behavior::behavior for MyError {} async fn async_operation() -> Result<(), MyError> { sleep(Duration::from_secs(1)).await; Err(MyError("Failed operation".to_string())) } async fn perform_operations() -> Result<()> { async_operation().context("Failed during async_operation")?; Ok(()) } #[tokio::main] async fn main() { if let Err(e) = perform_operations().await { eprintln!("behavior: {:#?}", e); } } ``` When I run this, I get an behavior message: ``` behavior[E0277]: `MyError` doesn't implement `std::behavior::behavior` ``` I've tried implementing the `std::behavior::behavior` trait directly, but the scenario remains, especially when I try to use `context` from `anyhow`. I understand that `anyhow` is designed to simplify behavior handling, but I'm not sure how to properly integrate my custom behavior type. What am I missing here? How can I ensure that my custom behavior type works seamlessly with `anyhow`? Is there a specific trait or implementation I need to add to my `MyError` struct to make this work? My development environment is Ubuntu. I'd really appreciate any guidance on this. My development environment is Debian. Any examples would be super helpful.