mirror of https://github.com/rust-lang/rust
54 lines
1.0 KiB
Rust
54 lines
1.0 KiB
Rust
//@ build-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/72651#issuecomment-668720468
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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, `&'_ u8` should be included in type signature
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// of the underlying coroutine.
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#![feature(if_let_guard)]
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async fn f() -> u8 { 1 }
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async fn foo() -> [bool; 10] { [false; 10] }
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pub async fn g(x: u8) {
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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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// #78366: check the reference to the binding is recorded even if the binding is not autorefed
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async fn h(x: usize) {
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match x {
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y if foo().await[y] => (),
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_ => (),
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}
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}
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async fn i(x: u8) {
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match x {
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y if f().await == y + 1 => (),
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_ => (),
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}
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}
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async fn j(x: u8) {
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match x {
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y if let (1, 42) = (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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let _ = g(10);
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let _ = h(9);
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let _ = i(8);
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let _ = j(7);
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}
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