I recently saw the `error_mancer` crate [1] that automatically generates error types for each function so that error definitions and functions are adjacent to e

I recently saw the `error_mancer` crate [1] that automatically generates error types for each function so that error definitions and functions are adjacent to each other. While it wouldn't be sufficient for all cases, I quite liked its approach. [1] https://crates.io/crates/error_mancer https://crates.io/crates/error_mancer