# errlog errlog is a simple log library based on anyhow, it wraps file name and line number for your error message. Add the errlog dependencies into your Cargo.toml, then import errlog macro use errlog::{elog, AnyContext, AnyResult}; Now you can use it in function that return `AnyResult` such as return Err(elog!("Unkown file type")); or File:open(filepath).context(elog!("Cannot open file {}", filepath))?;