From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/generator/yielding-in-match-guards.rs | 53 ++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 tests/ui/generator/yielding-in-match-guards.rs (limited to 'tests/ui/generator/yielding-in-match-guards.rs') diff --git a/tests/ui/generator/yielding-in-match-guards.rs b/tests/ui/generator/yielding-in-match-guards.rs new file mode 100644 index 000000000..4e89fc975 --- /dev/null +++ b/tests/ui/generator/yielding-in-match-guards.rs @@ -0,0 +1,53 @@ +// build-pass +// edition:2018 + +// This test is derived from +// https://github.com/rust-lang/rust/issues/72651#issuecomment-668720468 + +// This test demonstrates that, in `async fn g()`, +// indeed a temporary borrow `y` from `x` is live +// while `f().await` is being evaluated. +// Thus, `&'_ u8` should be included in type signature +// of the underlying generator. + +#![feature(if_let_guard)] + +async fn f() -> u8 { 1 } +async fn foo() -> [bool; 10] { [false; 10] } + +pub async fn g(x: u8) { + match x { + y if f().await == y => (), + _ => (), + } +} + +// #78366: check the reference to the binding is recorded even if the binding is not autorefed + +async fn h(x: usize) { + match x { + y if foo().await[y] => (), + _ => (), + } +} + +async fn i(x: u8) { + match x { + y if f().await == y + 1 => (), + _ => (), + } +} + +async fn j(x: u8) { + match x { + y if let (1, 42) = (f().await, y) => (), + _ => (), + } +} + +fn main() { + let _ = g(10); + let _ = h(9); + let _ = i(8); + let _ = j(7); +} -- cgit v1.2.3