mirror of https://github.com/rust-lang/rust
39 lines
1.0 KiB
Rust
39 lines
1.0 KiB
Rust
use std::mem::zeroed;
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enum Void {}
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fn main() {
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let x: Result<u32, &'static Void> = Ok(23);
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let _ = match x { //~ ERROR non-exhaustive
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Ok(n) => n,
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};
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// This is pretty much instant UB. However, we have no choice -- we need to
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// test matching on a reference to `&Void`; we cannot do anything other than
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// just accept the fact that this is UB if `main` did run, but it doesn't;
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// this test only checks that these are feature-gated.
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let x: &Void = unsafe { zeroed() };
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let _ = match x {}; //~ ERROR non-exhaustive
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let x: (Void,) = unsafe { zeroed() };
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let _ = match x {};
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let x: [Void; 1] = unsafe { zeroed() };
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let _ = match x {};
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let x: &[Void] = unsafe { zeroed() };
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let _ = match x { //~ ERROR non-exhaustive
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&[] => (),
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};
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let x: Void = unsafe { zeroed() };
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let _ = match x {}; // okay
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let x: Result<u32, Void> = Ok(23);
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let _ = match x {
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Ok(x) => x,
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};
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let x: Result<u32, Void> = Ok(23);
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let Ok(x) = x;
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}
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