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https://github.com/rust-lang/rust
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40 lines
987 B
Rust
40 lines
987 B
Rust
// Check that or-patterns with consistent bindings across arms are allowed.
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//@ edition:2018
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//@ check-pass
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fn main() {
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// One level:
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let (Ok(a) | Err(a)) = Ok(0);
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let (Ok(ref a) | Err(ref a)) = Ok(0);
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let (Ok(ref mut a) | Err(ref mut a)) = Ok(0);
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// Two levels:
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enum Tri<S, T, U> {
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V1(S),
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V2(T),
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V3(U),
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}
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use Tri::*;
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let (Ok((V1(a) | V2(a) | V3(a), b)) | Err(Ok((a, b)) | Err((a, b)))): Result<_, Result<_, _>> =
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Ok((V1(1), 1));
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let (Ok((V1(a) | V2(a) | V3(a), ref b)) | Err(Ok((a, ref b)) | Err((a, ref b)))): Result<
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_,
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Result<_, _>,
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> = Ok((V1(1), 1));
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// Three levels:
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let (
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a,
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Err((ref mut b, ref c, d))
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| Ok((
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Ok(V1((ref c, d)) | V2((d, ref c)) | V3((ref c, Ok((_, d)) | Err((d, _)))))
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| Err((ref c, d)),
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ref mut b,
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)),
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): (_, Result<_, _>) = (1, Ok((Ok(V3((1, Ok::<_, (i32, i32)>((1, 1))))), 1)));
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}
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