src/tools/rustfmt/tests/source/configs/match_arm_indent/nested.rs

// rustfmt-match_arm_indent: false

fn r#match() {
    match value {
        Arm::Prev => f(),
        // inline match
        ModeratelyLongOption(n) => match n {
            A => f(),
            B => {
                1;
                2;
                3;
            }
            AnotherLongerOption => {
                1;
                2;
            }
            _ if there || is || a || guard => {
                nothing_changes();
            }
        },
        Arm::Next => {
            1;
            2;
            3;
        }
    }
}

// things which break up the nested match arm
fn r#break() {
    match value {
        Arm::Prev => f(),
        // inline match
        ModeratelyLongOption(n) => #[attr] match n {
            A => f(),
            B => c(),
            C => 1,
        },
        Arm::Next => n(),
        Two | Patterns => /* inline comment */ match val {
            C => 3,
            D => func(),
        }
        Arm::Last => l(),
    }
}

fn parens() {
    let result = Some(Other(match value { Option1 => 1, Option2 => {stuff(); 2}}));
}

fn silly() {
    match value {
        Inner(i1) => match i1 {
            Inner(i2) => match i2 {
                Inner(i3) => match i3 {
                    Inner(i4) => match i4 {
                        Inner => "it's a readability tradeoff, really"
                    }
                }
            }
        }
    }
}