ron 0.8.0

#[derive(Debug, PartialEq, serde::Deserialize, serde::Serialize)]
struct MaybeFields {
    f1: i64,
    f2: Option<i64>,
    f3: Option<Option<i64>>,
}

#[test]
fn test_recursive_implicit_some() {
    // Test case provided by d86leader in
    //  https://github.com/ron-rs/ron/issues/367#issue-1147920589

    let x1: std::result::Result<MaybeFields, _> =
        ron::from_str("#![enable(implicit_some)]\n(f1: 1)");
    let x2: std::result::Result<MaybeFields, _> =
        ron::from_str("#![enable(implicit_some)]\n(f1: 1, f2: None, f3: None)");
    let x3: std::result::Result<MaybeFields, _> =
        ron::from_str("#![enable(implicit_some)]\n(f1: 1, f2: 2, f3: 3)");
    let x4: std::result::Result<MaybeFields, _> =
        ron::from_str("#![enable(implicit_some)]\n(f1: 1, f2: 2, f3: Some(3))");
    let x5: std::result::Result<MaybeFields, _> =
        ron::from_str("#![enable(implicit_some)]\n(f1: 1, f2: 2, f3: Some(Some(3)))");
    let x6: std::result::Result<MaybeFields, _> =
        ron::from_str("#![enable(implicit_some)]\n(f1: 1, f2: 2, f3: Some(None))");

    assert_eq!(
        x1,
        Ok(MaybeFields {
            f1: 1,
            f2: None,
            f3: None
        })
    );
    assert_eq!(
        x2,
        Ok(MaybeFields {
            f1: 1,
            f2: None,
            f3: None
        })
    );
    assert_eq!(
        x3,
        Ok(MaybeFields {
            f1: 1,
            f2: Some(2),
            f3: Some(Some(3))
        })
    );
    assert_eq!(
        x4,
        Ok(MaybeFields {
            f1: 1,
            f2: Some(2),
            f3: Some(Some(3))
        })
    );
    assert_eq!(
        x5,
        Ok(MaybeFields {
            f1: 1,
            f2: Some(2),
            f3: Some(Some(3))
        })
    );
    assert_eq!(
        x6,
        Ok(MaybeFields {
            f1: 1,
            f2: Some(2),
            f3: Some(None)
        })
    );
}

#[test]
fn test_nested_implicit_some() {
    assert_eq!(
        ron::from_str::<Option<Option<Option<u32>>>>("#![enable(implicit_some)]\n5"),
        Ok(Some(Some(Some(5))))
    );
    assert_eq!(
        ron::from_str::<Option<Option<Option<u32>>>>("#![enable(implicit_some)]\nNone"),
        Ok(None)
    );
    assert_eq!(
        ron::from_str::<Option<Option<Option<u32>>>>("#![enable(implicit_some)]\nSome(5)"),
        Ok(Some(Some(Some(5))))
    );
    assert_eq!(
        ron::from_str::<Option<Option<Option<u32>>>>("#![enable(implicit_some)]\nSome(None)"),
        Ok(Some(None))
    );
    assert_eq!(
        ron::from_str::<Option<Option<Option<u32>>>>("#![enable(implicit_some)]\nSome(Some(5))"),
        Ok(Some(Some(Some(5))))
    );
    assert_eq!(
        ron::from_str::<Option<Option<Option<u32>>>>("#![enable(implicit_some)]\nSome(Some(None))"),
        Ok(Some(Some(None)))
    );
    assert_eq!(
        ron::from_str::<Option<Option<Option<u32>>>>(
            "#![enable(implicit_some)]\nSome(Some(Some(5)))"
        ),
        Ok(Some(Some(Some(5))))
    );
}