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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/async-await/async-block-control-flow-static-semantics.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/async-await/async-block-control-flow-static-semantics.rs')
-rw-r--r-- | tests/ui/async-await/async-block-control-flow-static-semantics.rs | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/tests/ui/async-await/async-block-control-flow-static-semantics.rs b/tests/ui/async-await/async-block-control-flow-static-semantics.rs new file mode 100644 index 000000000..bc9d12793 --- /dev/null +++ b/tests/ui/async-await/async-block-control-flow-static-semantics.rs @@ -0,0 +1,65 @@ +// Test that `async { .. }` blocks: +// 1. do not allow `break` expressions. +// 2. get targeted by `return` and not the parent function. +// 3. get targeted by `?` and not the parent function. +// +// edition:2018 + +fn main() {} + +use core::future::Future; + +fn return_targets_async_block_not_fn() -> u8 { + //~^ ERROR mismatched types + let block = async { + return 0u8; + }; + let _: &dyn Future<Output = ()> = █ + //~^ ERROR to be a future that resolves to `()`, but it resolves to `u8` +} + +async fn return_targets_async_block_not_async_fn() -> u8 { + //~^ ERROR mismatched types [E0308] + let block = async { + return 0u8; + }; + let _: &dyn Future<Output = ()> = █ + //~^ ERROR to be a future that resolves to `()`, but it resolves to `u8` +} + +fn no_break_in_async_block() { + async { + break 0u8; //~ ERROR `break` inside of an `async` block + }; +} + +fn no_break_in_async_block_even_with_outer_loop() { + loop { + async { + break 0u8; //~ ERROR `break` inside of an `async` block + }; + } +} + +struct MyErr; +fn err() -> Result<u8, MyErr> { + Err(MyErr) +} + +fn rethrow_targets_async_block_not_fn() -> Result<u8, MyErr> { + //~^ ERROR mismatched types + let block = async { + err()?; + Ok(()) + }; + let _: &dyn Future<Output = Result<(), MyErr>> = █ +} + +fn rethrow_targets_async_block_not_async_fn() -> Result<u8, MyErr> { + //~^ ERROR mismatched types + let block = async { + err()?; + Ok(()) + }; + let _: &dyn Future<Output = Result<(), MyErr>> = █ +} |