use cc3316::Country;

let a3_str = "USA";

match Country::from_a3(a3_str) {
    Ok(code) => {
        // `Display` is implemented, displaying the Alpha-2 code.
        
        // `Debug` is implementented, diplaying the Country enum value.
        println!("{:?}", code); // "Country::US"
        // `alpha2()` returns the recommended general-purpose alpha-2 code.
        println!("  Alpha-2 code: {}", code.alpha2()); // "US"
        // `alpha3()` returns the alpha-3 code which is more closely related to 
        // the country name.
        println!("  Alpha-3 code: {}", code.alpha3()); // "USA"
        // `numeric()` returns the numeric code which can be useful if you need 
        // to avoid using Latin script.
        println!("  Numeric code: {}", code.numeric()); // 840
        // `country_data()` returns a reference to the underlying basic 
        // `CountryData` which includes the Alpha-2/-3 & numeric code.
        //
        // CountryData("US", "USA", 840) for `code`.
        println!("  Country data: {:?}", code.country_data()); 
    }
    Err(err) => panic!("Unable to parse country code `{}`: {}.", a3_str, err),
}