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|
// 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
match (a, b, c) {
(x, y, z) => {
println!("{} {} {}", x, y, z);
},
}
// Lint
match (a, b, c) {
(x, y, z) => 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
match a {
_ => println!("whatever"),
}
// Lint
match a {
_ => {
let x = 29;
println!("x has a value of {}", x);
},
}
// Lint
match a {
_ => {
let e = 5 * a;
if e >= 5 {
println!("e is superior to 5");
}
},
}
// Lint
let p = Point { x: 0, y: 7 };
match p {
Point { x, y } => println!("Coords: ({}, {})", x, y),
}
// Lint
match p {
Point { x: x1, y: y1 } => println!("Coords: ({}, {})", x1, y1),
}
// Lint
let x = 5;
match x {
ref r => println!("Got a reference to {}", r),
}
// Lint
let mut x = 5;
match x {
ref mut mr => println!("Got a mutable reference to {}", mr),
}
// Lint
let product = match coords() {
Point { x, y } => x * y,
};
// Lint
let v = vec![Some(1), Some(2), Some(3), Some(4)];
#[allow(clippy::let_and_return)]
let _ = v
.iter()
.map(|i| match i.unwrap() {
unwrapped => 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;
match match y {
0 => 1,
_ => 2,
} {
_ => 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"),
}
}
|
