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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/generator/yielding-in-match-guards.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/generator/yielding-in-match-guards.rs')
-rw-r--r-- | src/test/ui/generator/yielding-in-match-guards.rs | 53 |
1 files changed, 53 insertions, 0 deletions
diff --git a/src/test/ui/generator/yielding-in-match-guards.rs b/src/test/ui/generator/yielding-in-match-guards.rs new file mode 100644 index 000000000..4e89fc975 --- /dev/null +++ b/src/test/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); +} |