Rust Starter Kit 2020(wiki.alopex.li)

    #[derive(Debug, Snafu)]
    enum Error {
        #[snafu(display("Unable to read configuration from {}: {}", path.display(), source))]
        ReadConfiguration { source: io::Error, path: PathBuf },
    
        #[snafu(display("Unable to write configuration to {}: {}", path.display(), source))]
        WriteConfiguration { source: io::Error, path: PathBuf },
    }
    
    type Result<T, E = Error> = std::result::Result<T, E>;
    
    fn example(path: &Path) -> Result<()> {
        let data = fs::read_to_string(path).context(ReadConfiguration { path })?;
        fs::write(data, path).context(WriteConfiguration { path })?;
        Ok(())
    }