1
2
3

let o: Option<u32> = Some(200u32);
let r: Result<u32,()> = o.ok_or(());
assert_eq!(r, Ok(200u32));

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2
3

let r: Result<u32,()> = Ok(200u32);
let o: Option<u32> = r.ok();
assert_eq!(o, Some(200u32));

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2
3
4
5
6

let foo = 4;

match foo {
    x @ 0..=5 => assert_eq!(x,4),
    y @ _ => panic!("{}-too many!", y)
}

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2
3
4
5
6

let point: (u32,u32) = (1, 2);

match point {
    (1, y @ _) => assert_eq!(y,2),
    _ => {}
}

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2
3
4
5

let point: (u32,u32) = (1, 2);
let mypoint @ (x, _) = point;

assert_eq!(x,1);
assert_eq(mypoint,point);

1
2

let foo = vec!['1','2'];
assert!(matches!(foo.len(), 0..=1));

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2
3

let bar = Some(4);

assert!(matches!(bar, Some(x) if x > 2));

1
2

let hello = "Hello, rustbites!";
println!("{}", hello);