b855308521
Add test checking that it is possible to capture fields of a multi-variant enum, when remaining variants are visibly uninhabited (under the `exhaustive_patterns` feature gate).
21 lines
472 B
Rust
21 lines
472 B
Rust
// Test precise capture of a multi-variant enum (when remaining variants are
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// visibly uninhabited).
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// edition:2021
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// run-pass
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#![feature(exhaustive_patterns)]
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#![feature(never_type)]
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pub fn main() {
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let mut r = Result::<!, (u32, u32)>::Err((0, 0));
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let mut f = || {
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let Err((ref mut a, _)) = r;
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*a = 1;
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};
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let mut g = || {
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let Err((_, ref mut b)) = r;
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*b = 2;
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};
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f();
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g();
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assert_eq!(r, Err((1, 2)));
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}
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