History

Ian Jackson 36b9d11ecb retry-error: Attempts must be AsRef<dyn Error>; print their sources The effect is that everywhere a RetryError is used, the error sources for the contained errors will be Display'd. In tor-hsclient we no longer need to explicitly wrap things up in tor_error::Report.		2023-07-19 14:16:13 +01:00
..
src	retry-error: Attempts must be AsRef<dyn Error>; print their sources	2023-07-19 14:16:13 +01:00
Cargo.toml	retry-error: Introduce a Wrapper type in a test	2023-07-19 14:16:13 +01:00
README.md	Fix sentences	2022-04-27 13:53:23 +01:00
semver.md	retry-error: Attempts must be AsRef<dyn Error>; print their sources	2023-07-19 14:16:13 +01:00

README.md

retry-error

An error attempt to represent multiple failures.

This crate implements [RetryError], a type to use when you retry something a few times, and all those attempts can fail differently each time. Instead of returning only a single error, it records all of the errors received, in case they are different.

This crate is developed as part of Arti, a project to implement Tor in Rust. It's used by higher-level crates that retry operations.

Example

use retry_error::RetryError;

fn some_operation() -> anyhow::Result<bool> {
   unimplemented!(); // example
}

fn example() -> Result<(), RetryError<anyhow::Error>> {
   const N_ATTEMPTS: usize = 10;
   let mut err = RetryError::in_attempt_to("perform an example operation");
   for _ in 0..N_ATTEMPTS {
       match some_operation() {
           Ok(val) => return Ok(()),
           Err(e) => err.push(e),
       }
   }
   // All attempts failed; return all the errors.
   return Err(err);
}

License: MIT OR Apache-2.0