rust/src/test/compile-fail/non-exhaustive-match.rs

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enum t { a, b, }
fn main() {
let x = a;
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match x { b => { } } //~ ERROR non-exhaustive patterns
match true { //~ ERROR non-exhaustive patterns
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true => {}
}
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match @some(10) { //~ ERROR non-exhaustive patterns
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@none => {}
}
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match (2, 3, 4) { //~ ERROR non-exhaustive patterns
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(_, _, 4) => {}
}
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match (a, a) { //~ ERROR non-exhaustive patterns
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(a, b) => {}
(b, a) => {}
}
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match a { //~ ERROR b not covered
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a => {}
}
// This is exhaustive, though the algorithm got it wrong at one point
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match (a, b) {
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(a, _) => {}
(_, a) => {}
(b, b) => {}
}
}