// run-rustfix

#![warn(clippy::match_single_binding)]
#![allow(unused_variables, clippy::many_single_char_names, clippy::toplevel_ref_arg)]

struct Point {
    x: i32,
    y: i32,
}

fn coords() -> Point {
    Point { x: 1, y: 2 }
}

macro_rules! foo {
    ($param:expr) => {
        match $param {
            _ => println!("whatever"),
        }
    };
}

fn main() {
    let a = 1;
    let b = 2;
    let c = 3;
    // Lint
    let (x, y, z) = (a, b, c);
    {
        println!("{} {} {}", x, y, z);
    }
    // Lint
    let (x, y, z) = (a, b, c);
    println!("{} {} {}", x, y, z);
    // Ok
    foo!(a);
    // Ok
    match a {
        2 => println!("2"),
        _ => println!("Not 2"),
    }
    // Ok
    let d = Some(5);
    match d {
        Some(d) => println!("{}", d),
        _ => println!("None"),
    }
    // Lint
    println!("whatever");
    // Lint
    {
        let x = 29;
        println!("x has a value of {}", x);
    }
    // Lint
    {
        let e = 5 * a;
        if e >= 5 {
            println!("e is superior to 5");
        }
    }
    // Lint
    let p = Point { x: 0, y: 7 };
    let Point { x, y } = p;
    println!("Coords: ({}, {})", x, y);
    // Lint
    let Point { x: x1, y: y1 } = p;
    println!("Coords: ({}, {})", x1, y1);
    // Lint
    let x = 5;
    let ref r = x;
    println!("Got a reference to {}", r);
    // Lint
    let mut x = 5;
    let ref mut mr = x;
    println!("Got a mutable reference to {}", mr);
    // Lint
    let Point { x, y } = coords();
    let product = x * y;
    // Lint
    let v = vec![Some(1), Some(2), Some(3), Some(4)];
    #[allow(clippy::let_and_return)]
    let _ = v
        .iter()
        .map(|i| {
            let unwrapped = i.unwrap();
            unwrapped
        })
        .collect::<Vec<u8>>();
    // Ok
    let x = 1;
    match x {
        #[cfg(disabled_feature)]
        0 => println!("Disabled branch"),
        _ => println!("Enabled branch"),
    }
    // Lint
    let x = 1;
    let y = 1;
    println!("Single branch");
    // Ok
    let x = 1;
    let y = 1;
    match match y {
        0 => 1,
        _ => 2,
    } {
        #[cfg(disabled_feature)]
        0 => println!("Array index start"),
        _ => println!("Not an array index start"),
    }
    // False negative
    let x = 1;
    match x {
        // =>
        _ => println!("Not an array index start"),
    }
    // Lint (additional curly braces needed, see #6572)
    struct AppendIter<I>
    where
        I: Iterator,
    {
        inner: Option<(I, <I as Iterator>::Item)>,
    }

    #[allow(dead_code)]
    fn size_hint<I: Iterator>(iter: &AppendIter<I>) -> (usize, Option<usize>) {
        match &iter.inner {
            Some((iter, _item)) => {
                let (min, max) = iter.size_hint();
                (min.saturating_add(1), max.and_then(|max| max.checked_add(1)))
            },
            None => (0, Some(0)),
        }
    }
    // Lint (no additional curly braces needed)
    let opt = Some((5, 2));
    let get_tup = || -> (i32, i32) { (1, 2) };
    match opt {
        #[rustfmt::skip]
        Some((first, _second)) => {
            let (a, b) = get_tup();
            println!("a {:?} and b {:?}", a, b);
        },
        None => println!("nothing"),
    }
}