rust/tests/source/chains.rs

// Test chain formatting.

fn main() {
    // Don't put chains on a single line if it wasn't so in source.
    let a = b .c
    .d.1
                .foo(|x| x + 1);

    bbbbbbbbbbbbbbbbbbb.ccccccccccccccccccccccccccccccccccccc
                       .ddddddddddddddddddddddddddd();

    bbbbbbbbbbbbbbbbbbb.ccccccccccccccccccccccccccccccccccccc.ddddddddddddddddddddddddddd.eeeeeeee();

    // Test case where first chain element isn't a path, but is shorter than
    // the size of a tab.
    x()
        .y(|| match cond() { true => (), false => () });

    loong_func()
        .quux(move || if true {
            1
        } else {
            2
        });

    some_fuuuuuuuuunction()
        .method_call_a(aaaaa, bbbbb, |c| {
            let x = c;
            x
        });

    some_fuuuuuuuuunction().method_call_a(aaaaa, bbbbb, |c| {
        let x = c;
        x
    }).method_call_b(aaaaa, bbbbb, |c| {
        let x = c;
        x
    });

    fffffffffffffffffffffffffffffffffff(a,
                                        {
                                            SCRIPT_TASK_ROOT
                                            .with(|root| {
                                                *root.borrow_mut()  =   Some(&script_task);
                                            });
                                        });                                        

    let suuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuum = xxxxxxx
        .map(|x| x + 5)
        .map(|x| x / 2)
        .fold(0, |acc, x| acc + x);

    aaaaaaaaaaaaaaaa.map(|x| {
                         x += 1;
                         x
                     }).filter(some_mod::some_filter)
}

fn floaters() {
    let z = Foo {
        field1: val1,
        field2: val2,
    };

    let x = Foo {
        field1: val1,
        field2: val2,
    }.method_call().method_call();

    let y = if cond {
                val1
            } else {
                val2
            }
                .method_call();

    {
        match x {
            PushParam => {
                // params are 1-indexed
                stack.push(mparams[match cur.to_digit(10) {
                    Some(d) => d as usize - 1,
                    None => return Err("bad param number".to_owned()),
                }]
                               .clone());
            }
        }
    }

    if cond { some(); } else { none(); }
        .bar()
        .baz();

    Foo { x: val } .baz(|| { /*force multiline    */    }) .quux(); 

    Foo { y: i_am_multi_line, z: ok }
        .baz(|| {
            // force multiline
        })
        .quux(); 

    a + match x { true => "yay!", false => "boo!" }.bar()
}