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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-07 05:48:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-07 05:48:48 +0000 |
commit | ef24de24a82fe681581cc130f342363c47c0969a (patch) | |
tree | 0d494f7e1a38b95c92426f58fe6eaa877303a86c /tests/coverage/coroutine.rs | |
parent | Releasing progress-linux version 1.74.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-ef24de24a82fe681581cc130f342363c47c0969a.tar.xz rustc-ef24de24a82fe681581cc130f342363c47c0969a.zip |
Merging upstream version 1.75.0+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/coverage/coroutine.rs')
-rw-r--r-- | tests/coverage/coroutine.rs | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/tests/coverage/coroutine.rs b/tests/coverage/coroutine.rs new file mode 100644 index 000000000..86d19af6f --- /dev/null +++ b/tests/coverage/coroutine.rs @@ -0,0 +1,30 @@ +#![feature(coroutines, coroutine_trait)] + +use std::ops::{Coroutine, CoroutineState}; +use std::pin::Pin; + +// The following implementation of a function called from a `yield` statement +// (apparently requiring the Result and the `String` type or constructor) +// creates conditions where the `coroutine::StateTransform` MIR transform will +// drop all `Counter` `Coverage` statements from a MIR. `simplify.rs` has logic +// to handle this condition, and still report dead block coverage. +fn get_u32(val: bool) -> Result<u32, String> { + if val { Ok(1) } else { Err(String::from("some error")) } +} + +fn main() { + let is_true = std::env::args().len() == 1; + let mut coroutine = || { + yield get_u32(is_true); + return "foo"; + }; + + match Pin::new(&mut coroutine).resume(()) { + CoroutineState::Yielded(Ok(1)) => {} + _ => panic!("unexpected return from resume"), + } + match Pin::new(&mut coroutine).resume(()) { + CoroutineState::Complete("foo") => {} + _ => panic!("unexpected return from resume"), + } +} |