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test derived from #74961
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src/test/ui/generator/yielding-in-match-guards.rs
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29
src/test/ui/generator/yielding-in-match-guards.rs
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// check-pass
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// edition:2018
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// This test is derived from
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// https://github.com/rust-lang/rust/issues/74961#issuecomment-666893845
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// by @SNCPlay42
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// This test demonstrates that, in `async fn g()`,
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// indeed a temporary borrow `y` from `x` is live
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// while `f().await` is being evaluated.
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// Thus, `&'_ A` should be included in type signature
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// of the underlying generator.
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#[derive(PartialEq, Eq)]
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struct A;
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async fn f() -> A {
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A
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}
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async fn g() {
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let x = A;
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match x {
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y if f().await == y => {}
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_ => {}
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}
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}
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fn main() {}
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