src/tools/rustfmt/tests/target/expr-block.rs

// Test expressions with block formatting.

fn arrays() {
    [];
    let empty = [];

    let foo = [a_long_name, a_very_lng_name, a_long_name];

    let foo = [
        a_long_name,
        a_very_lng_name,
        a_long_name,
        a_very_lng_name,
        a_long_name,
        a_very_lng_name,
        a_long_name,
        a_very_lng_name,
    ];

    vec![
        a_long_name,
        a_very_lng_name,
        a_long_name,
        a_very_lng_name,
        a_long_name,
        a_very_lng_name,
        a_very_lng_name,
    ];

    [
        a_long_name,
        a_very_lng_name,
        a_long_name,
        a_very_lng_name,
        a_long_name,
        a_very_lng_name,
        a_very_lng_name,
    ]
}

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 { weight: x, item: 0 },
        Weighted { weight: 1, item: 1 },
        Weighted { weight: x, item: 2 },
        Weighted { weight: 1, item: 3 },
    ]);

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

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

fn function_calls() {
    let items = itemize_list(
        context.source_map,
        args.iter(),
        ")",
        |item| item.span.lo(),
        |item| item.span.hi(),
        |item| {
            item.rewrite(
                context,
                Shape {
                    width: remaining_width,
                    ..nested_shape
                },
            )
        },
        span.lo(),
        span.hi(),
    );

    itemize_list(
        context.source_map,
        args.iter(),
        ")",
        |item| item.span.lo(),
        |item| item.span.hi(),
        |item| {
            item.rewrite(
                context,
                Shape {
                    width: remaining_width,
                    ..nested_shape
                },
            )
        },
        span.lo(),
        span.hi(),
    )
}

fn macros() {
    baz!(
        do_not, add, trailing, commas, inside, of, function, like, macros, even, if_they, are, long
    );

    baz!(one_item_macro_which_is_also_loooooooooooooooooooooooooooooooooooooooooooooooong);

    let _ = match option {
        None => baz!(
            function,
            like,
            macro_as,
            expression,
            which,
            is,
            loooooooooooooooong
        ),
        Some(p) => baz!(one_item_macro_as_expression_which_is_also_loooooooooooooooong),
    };
}

fn issue_1450() {
    if selfstate
        .compare_exchandsfasdsdfgsdgsdfgsdfgsdfgsdfgsdfgfsfdsage_weak(
            STATE_PARKED,
            STATE_UNPARKED,
            Release,
            Relaxed,
            Release,
            Relaxed,
        )
        .is_ok()
    {
        return;
    }
}

fn foo() {
    if real_total <= limit
        && !pre_line_comments
        && !items.into_iter().any(|item| item.as_ref().is_multiline())
    {
        DefinitiveListTactic::Horizontal
    }
}

fn combine_block() {
    foo(Bar {
        x: value,
        y: value2,
    });

    foo((Bar {
        x: value,
        y: value2,
    },));

    foo((
        1,
        2,
        3,
        Bar {
            x: value,
            y: value2,
        },
    ));

    foo((1, 2, 3, |x| {
        let y = x + 1;
        let z = y + 1;
        z
    }));

    let opt = Some(Struct(
        long_argument_one,
        long_argument_two,
        long_argggggggg,
    ));

    do_thing(|param| {
        action();
        foo(param)
    });

    do_thing(x, |param| {
        action();
        foo(param)
    });

    do_thing(
        x,
        (1, 2, 3, |param| {
            action();
            foo(param)
        }),
    );

    Ok(some_function(
        lllllllllong_argument_one,
        lllllllllong_argument_two,
        lllllllllllllllllllllllllllllong_argument_three,
    ));

    foo(
        thing,
        bar(
            param2,
            pparam1param1param1param1param1param1param1param1param1param1aram1,
            param3,
        ),
    );

    foo.map_or(|| {
        Ok(SomeStruct {
            f1: 0,
            f2: 0,
            f3: 0,
        })
    });

    match opt {
        Some(x) => somefunc(anotherfunc(
            long_argument_one,
            long_argument_two,
            long_argument_three,
        )),
        Some(x) => |x| {
            let y = x + 1;
            let z = y + 1;
            z
        },
        Some(x) => (1, 2, |x| {
            let y = x + 1;
            let z = y + 1;
            z
        }),
        Some(x) => SomeStruct {
            f1: long_argument_one,
            f2: long_argument_two,
            f3: long_argument_three,
        },
        None => Ok(SomeStruct {
            f1: long_argument_one,
            f2: long_argument_two,
            f3: long_argument_three,
        }),
    };

    match x {
        y => func(xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx),
        _ => func(
            x,
            yyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyyy,
            zzz,
        ),
    }
}

fn issue_1862() {
    foo(
        /* bar = */ None,
        something_something,
        /* baz = */ None,
        /* This comment waaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay too long to be kept on the same line */
        None,
        /* com */
        this_last_arg_is_tooooooooooooooooooooooooooooooooo_long_to_be_kept_with_the_pre_comment,
    )
}

fn issue_3025() {
    foo(
        // This describes the argument below.
        /* bar = */ None,
        // This describes the argument below.
        something_something,
        // This describes the argument below. */
        None,
        // This describes the argument below.
        /* This comment waaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaay too long to be kept on the same line */
        None,
        // This describes the argument below.
        /* com */
        this_last_arg_is_tooooooooooooooooooooooooooooooooo_long_to_be_kept_with_the_pre_comment,
    )
}

fn issue_1878() {
    let channel: &str = seq
        .next_element()?
        .ok_or_else(|| de::Error::invalid_length(2, &self))?;
}