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31 lines
842 B
Rust
31 lines
842 B
Rust
// run-pass
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fn or_at(x: Result<u32, u32>) -> u32 {
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match x {
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Ok(x @ 4) | Err(x @ (6 | 8)) => x,
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Ok(x @ 1 | x @ 2) => x,
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Err(x @ (0..=10 | 30..=40)) if x % 2 == 0 => x + 100,
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Err(x @ 0..=40) => x + 200,
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_ => 500,
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}
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}
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fn main() {
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assert_eq!(or_at(Ok(1)), 1);
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assert_eq!(or_at(Ok(2)), 2);
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assert_eq!(or_at(Ok(3)), 500);
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assert_eq!(or_at(Ok(4)), 4);
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assert_eq!(or_at(Ok(5)), 500);
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assert_eq!(or_at(Ok(6)), 500);
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assert_eq!(or_at(Err(1)), 201);
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assert_eq!(or_at(Err(2)), 102);
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assert_eq!(or_at(Err(3)), 203);
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assert_eq!(or_at(Err(4)), 104);
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assert_eq!(or_at(Err(5)), 205);
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assert_eq!(or_at(Err(6)), 6);
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assert_eq!(or_at(Err(7)), 207);
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assert_eq!(or_at(Err(8)), 8);
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assert_eq!(or_at(Err(20)), 220);
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assert_eq!(or_at(Err(50)), 500);
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}
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