rust/tests/target/expr.rs

// rustfmt-normalize_comments: true
// rustfmt-wrap_comments: true
// Test expressions

fn foo() -> bool {
    let referenced = &5;

    let very_long_variable_name = (a + first + simple + test);
    let very_long_variable_name =
        (a + first + simple + test + AAAAAAAAAAAAA + BBBBBBBBBBBBBBBBB + b + c);

    let is_internalxxxx =
        self.source_map.span_to_filename(s) == self.source_map.span_to_filename(m.inner);

    let some_val = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa * bbbb
        / (bbbbbb - function_call(x, *very_long_pointer, y))
        + 1000;

    some_ridiculously_loooooooooooooooooooooong_function(
        10000 * 30000000000 + 40000 / 1002200000000 - 50000 * sqrt(-1),
        trivial_value,
    );
    (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        + a
        + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        + aaaaa);

    {
        for _ in 0..10 {}
    }

    {
        {
            {
                {}
            }
        }
    }

    if 1 + 2 > 0 {
        let result = 5;
        result
    } else {
        4
    };

    if let Some(x) = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa {
        // Nothing
    }

    if let Some(x) =
        (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa)
    {}

    if let (
        some_very_large,
        tuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuple,
    ) = 1 + 2 + 3
    {}

    if let (
        some_very_large,
        tuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuple,
    ) = 1111 + 2222
    {}

    if let (
        some_very_large,
        tuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuple,
    ) = 1 + 2 + 3
    {}

    if let ast::ItemKind::Trait(_, unsafety, ref generics, ref type_param_bounds, ref trait_items) =
        item.node
    {
        // nothing
    }

    let test = if true { 5 } else { 3 };

    if cond() {
        something();
    } else if different_cond() {
        something_else();
    } else {
        // Check subformatting
        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
            + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
    }

    // #2884
    let _ = [0; {
        struct Foo;
        impl Foo {
            const fn get(&self) -> usize {
                5
            }
        };
        Foo.get()
    }];
}

fn bar() {
    let range =
        (111111111 + 333333333333333333 + 1111 + 400000000000000000)..(2222 + 2333333333333333);

    let another_range = 5..some_func(a, b /* comment */);

    for _ in 1.. {
        call_forever();
    }

    syntactically_correct(
        loop {
            sup('?');
        },
        if cond { 0 } else { 1 },
    );

    let third = ..10;
    let infi_range = ..;
    let foo = 1..;
    let bar = 5;
    let nonsense = (10..0)..(0..10);

    loop {
        if true {
            break;
        }
    }

    let x = (
        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa && aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa,
        a,
    );
}

fn baz() {
    unsafe /* {}{}{}{{{{}} */ {
        let foo = 1u32;
    }

    unsafe /* very looooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooong
            * comment */ {
    }

    unsafe /* So this is a very long comment.
            * Multi-line, too.
            * Will it still format correctly? */ {
    }

    unsafe {
        // Regular unsafe block
    }

    unsafe { foo() }

    unsafe {
        foo();
    }

    // #2289
    let identifier_0 = unsafe { this_is_58_chars_long_and_line_is_93_chars_long_xxxxxxxxxx };
    let identifier_1 = unsafe { this_is_59_chars_long_and_line_is_94_chars_long_xxxxxxxxxxx };
    let identifier_2 = unsafe { this_is_65_chars_long_and_line_is_100_chars_long_xxxxxxxxxxxxxxxx };
    let identifier_3 =
        unsafe { this_is_66_chars_long_and_line_is_101_chars_long_xxxxxxxxxxxxxxxxx };
}

// Test some empty blocks.
fn qux() {
    {}
    // FIXME this one could be done better.
    { /* a block with a comment */ }
    {}
    {
        // A block with a comment.
    }
}

fn issue184(source: &str) {
    for c in source.chars() {
        if index < 'a' {
            continue;
        }
    }
}

fn arrays() {
    let x = [
        0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 0, 7, 8, 9, 0, 1, 2, 3, 4, 5,
        6, 7, 8, 9, 0,
    ];

    let y = [/* comment */ 1, 2 /* post comment */, 3];

    let xy = [
        strukt {
            test123: value_one_two_three_four,
            turbo: coolio(),
        },
        // comment
        1,
    ];

    let a = WeightedChoice::new(&mut [
        Weighted {
            weightweight: x,
            item: 0,
        },
        Weighted {
            weightweight: 1,
            item: 1,
        },
        Weighted {
            weightweight: x,
            item: 2,
        },
        Weighted {
            weightweight: 1,
            item: 3,
        },
    ]);

    let z = [
        xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,
        yyyyyyyyyyyyyyyyyyyyyyyyyyy,
        zzzzzzzzzzzzzzzzzz,
        q,
    ];

    [1 + 3, 4, 5, 6, 7, 7, fncall::<Vec<_>>(3 - 1)]
}

fn returns() {
    aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        && return;

    return aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        + aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa;
}

fn addrof() {
    &mut (aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb);
    &(aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
        + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb);

    // raw reference operator
    &raw const a;
    &raw mut b;
}

fn casts() {
    fn unpack(packed: u32) -> [u16; 2] {
        [(packed >> 16) as u16, (packed >> 0) as u16]
    }

    let some_trait_xxx = xxxxxxxxxxx + xxxxxxxxxxxxx as SomeTraitXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX;
    let slightly_longer_trait =
        yyyyyyyyy + yyyyyyyyyyy as SomeTraitYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYYY;
}

fn indices() {
    let x = (aaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb + cccccccccccccccc)
        [x + y + z];
    let y = (aaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb + cccccccccccccccc)
        [xxxxx + yyyyy + zzzzz];
    let z = xxxxxxxxxx
        .x()
        .y()
        .zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz()[aaaaa];
    let z = xxxxxxxxxx
        .x()
        .y()
        .zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz()
        [aaaaa];
}

fn repeats() {
    let x = [aaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb + cccccccccccccccc;
        x + y + z];
    let y = [aaaaaaaaaaaaaaaaaaaaaaaaaaaa + bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb + cccccccccccccccc;
        xxxxx + yyyyy + zzzzz];
}

fn blocks() {
    if 1 + 1 == 2 {
        println!("yay arithmetix!");
    };
}

fn issue767() {
    if false {
        if false {
        } else {
            // A let binding here seems necessary to trigger it.
            let _ = ();
        }
    } else if let false = false {
    }
}

fn ranges() {
    let x = aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa..bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;
    let y =
        aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa..=bbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbbb;
    let z = ..=x;

    // #1766
    let x = [0. ..10.0];
    let x = [0. ..=10.0];

    a..=b

    // the expr below won't compile because inclusive ranges need a defined end
    // let a = 0 ..= ;
}

fn if_else() {
    let exact = diff / (if size == 0 { 1 } else { size });

    let cx = tp1.x + any * radius * if anticlockwise { 1.0 } else { -1.0 };
}

fn complex_if_else() {
    if let Some(x) = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx {
    } else if let Some(x) = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx {
        ha();
    } else if xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx + xxxxxxxx {
        yo();
    } else if let Some(x) = xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
    {
        ha();
    } else if xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx + xxxxxxxxx
    {
        yo();
    }
}

fn issue1106() {
    {
        if let hir::ItemEnum(ref enum_def, ref generics) =
            self.ast_map.expect_item(enum_node_id).node
        {}
    }

    for entry in WalkDir::new(path)
        .into_iter()
        .filter_entry(|entry| exclusions.filter_entry(entry))
    {}
}

fn issue1570() {
    a_very_long_function_name({ some_func(1, { 1 }) })
}

fn issue1714() {
    v = &mut { v }[mid..];
    let (left, right) = { v }.split_at_mut(mid);
}

// Multi-lined index should be put on the next line if it fits in one line.
fn issue1749() {
    {
        {
            {
                if self.shape[(r as f32 + self.x_offset) as usize]
                    [(c as f32 + self.y_offset) as usize]
                    != 0
                {
                    // hello
                }
            }
        }
    }
}

// #1172
fn newlines_between_list_like_expr() {
    foo(
        xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,
        yyyyyyyyyyyyyyyyyyyyyyyyyyyyyy,
        zzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,
    );

    vec![
        xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx,
        yyyyyyyyyyyyyyyyyyyyyyyyyyyyyy,
        zzzzzzzzzzzzzzzzzzzzzzzzzzzzzz,
    ];

    match x {
        xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
        | yyyyyyyyyyyyyyyyyyyyyyyyyyyyyy
        | zzzzzzzzzzzzzzzzzzzzzzzzzzzzzz => foo(a, b, c),
        _ => bar(),
    };
}

fn issue2178() {
    Ok(result
        .iter()
        .map(|item| ls_util::rls_to_location(item))
        .collect())
}

// #2493
impl Foo {
    fn bar(&self) {
        {
            let x = match () {
                () => {
                    let i;
                    i == self
                        .install_config
                        .storage
                        .experimental_compressed_block_size as usize
                }
            };
        }
    }
}

fn dots() {
    .. .. ..; // (.. (.. (..)))
    ..= ..= ..;
    (..).. ..; // ((..) .. (..))
}

// #2676
// A function call with a large single argument.
fn foo() {
    let my_var = Mutex::new(
        RpcClientType::connect(server_iddd).chain_err(|| "Unable to create RPC client")?,
    );
}

// #2704
// Method call with prefix and suffix.
fn issue2704() {
    // We should not combine the callee with a multi-lined method call.
    let requires = requires.set(
        &requires0
            .concat(&requires1)
            .concat(&requires2)
            .distinct_total(),
    );
    let requires = requires.set(
        requires0
            .concat(&requires1)
            .concat(&requires2)
            .distinct_total() as u32,
    );
    let requires = requires.set(
        requires0
            .concat(&requires1)
            .concat(&requires2)
            .distinct_total()?,
    );
    let requires = requires.set(
        !requires0
            .concat(&requires1)
            .concat(&requires2)
            .distinct_total(),
    );
    // We should combine a small callee with an argument.
    bar(vec![22]
        .into_iter()
        .map(|x| x * 2)
        .filter(|_| true)
        .collect());
    // But we should not combine a long callee with an argument.
    barrrr(
        vec![22]
            .into_iter()
            .map(|x| x * 2)
            .filter(|_| true)
            .collect(),
    );
}

// #2782
fn issue2782() {
    {
        let f = {
            let f = {
                {
                    match f {
                        F(f, _) => loop {
                            let f = {
                                match f {
                                    F(f, _) => match f {
                                        F(f, _) => loop {
                                            let f = {
                                                let f = {
                                                    match f {
                                                        '-' => F(f, ()),
                                                    }
                                                };
                                            };
                                        },
                                    },
                                }
                            };
                        },
                    }
                }
            };
        };
    }
}

fn issue_2802() {
    function_to_fill_this_line(some_arg, some_arg, some_arg)
        * a_very_specific_length(specific_length_arg)
        * very_specific_length(Foo {
            a: some_much_much_longer_value,
        })
        * some_value
}

fn issue_3003() {
    let mut path: PathBuf = [
        env!("CARGO_MANIFEST_DIR"),
        "tests",
        "support",
        "dejavu-fonts-ttf-2.37",
        "ttf",
    ]
    .iter()
    .collect();
}

fn issue3226() {
    {
        {
            {
                return Err(
                    ErrorKind::ManagementInterfaceError("Server exited unexpectedly").into(),
                );
            }
        }
    }
    {
        {
            {
                break Err(
                    ErrorKind::ManagementInterfaceError("Server exited unexpectedlyy").into(),
                );
            }
        }
    }
}

// #3457
fn issue3457() {
    {
        {
            {
                {
                    {
                        {
                            {
                                {
                                    {
                                        {
                                            {
                                                {
                                                    {
                                                        {
                                                            {
                                                                {
                                                                    {
                                                                        {
                                                                            {
                                                                                {
                                                                                    {
                                                                                        {
                                                                                            {
                                                                                                {
                                                                                                    println!("Test");
                                                                                                }
                                                                                            }
                                                                                        }
                                                                                    }
                                                                                }
                                                                            }
                                                                        }
                                                                    }
                                                                }
                                                            }
                                                        }
                                                    }
                                                }
                                            }
                                        }
                                    }
                                }
                            }
                        }
                    }
                }
            }
        }
    }
}

// #3498
static REPRO: &[usize] = &[
    #[cfg(feature = "zero")]
    0,
];

fn overflow_with_attr() {
    foo(
        #[cfg(feature = "zero")]
        0,
    );
    foobar(
        #[cfg(feature = "zero")]
        0,
    );
    foobar(
        x,
        y,
        #[cfg(feature = "zero")]
        {},
    );
}

// https://github.com/rust-lang/rustfmt/issues/3765
fn foo() {
    async {
        // Do
        // some
        // work
    }
    .await;

    async {
        // Do
        // some
        // work
    }
    .await;
}

fn underscore() {
    _ = 1;
    _;
    [_, a, _] = [1, 2, 3];
    (a, _) = (8, 9);
    TupleStruct(_, a) = TupleStruct(2, 2);

    let _: usize = foo(_, _);
}