Freedom Dates

没有人应该把我认为是展示书面日期的正确方式弄错了。 ——乔治·华盛顿将军

freedom-dates 库提供了一组方便的工具，用于处理 freedom 格式 的日期。也就是说，它将类似 "2023-02-08" 的共产格式日期表示形式解放为类似 "2/8/23" 的自由格式。

    let communism = "2023-02-08T12:00:00-07:00";

    let freedom = FreedomDate::liberate(communism).unwrap();
    
    assert_eq!("2/7/23", &result.to_string());

由于自由诞生于1776年7月4日（《7/4/76》），因此在此之前的日期既不有效也不可表示。如果您尝试解放这样的日期，您将获得一个 FreedomError::PreCreation 错误。尝试解放“过于”共产的日期将导致一个 FreedomError::TooCommunist 错误。

    let bad_communism = "Comrade, today is the eighth of Februrary, in the year 2023.";
    let pre_history = "1775-07-04";

    let too_communist = FreedomDate::liberate(bad_communism).unwrap_err();
    let pre_historic_nonsense = FreedomDate::liberate(pre_history).unwrap_err();

    println!("'{bad_communism}' is impossible to comprehend: `{too_communist}`\n");

    println!("'{pre_history}' is not a real date: `{pre_historic_nonsense}`\n");

将打印出来

'Comrade, today is the eighth of Februrary, in the year 2023.' is impossible to comprehend: I't speak your crazy Communism-language! 'Comrade, today is the eighth of Februrary, in the year 2023.'

    // `From<u64>` is implemented for FreedomDates
    let birthday_of_freedom: FreedomDate = 0.into();
    println!("The Birthday of Freedom is {birthday_of_freedom}\n");

    let one_day = Duration::days(1);
    let day_after_freedom = birthday_of_freedom + one_day;
    println!(
        "The day after Freedom was born, {day_after_freedom}, {} seconds had passed.",
        day_after_freedom.freedomstamp()
    );